Fullstack Software Engineer at OneCrew | San Francisco

Join OneCrew as a passionate and skilled Fullstack Software Engineer. In this dynamic role, you will collaborate closely with our co-founders and engineering team to shape and enhance our product and platform as we expand our customer base.Location: This position is located in San Francisco, with an expectation of in-office work at our FiDi office for at least 3 days a week.Your RoleYour main focus will be to create dependable, high-performance systems and features that empower paving contractors to run their businesses with efficiency and confidence.Design, develop, and deploy innovative products and features—including AI-driven automation—that transform how contractors estimate jobs, manage teams, and monitor profitability in real-time.Implement AI-enhanced functionalities that redefine industry standards, offering intelligent estimating, predictive crew optimization, and automated insights that facilitate quicker decision-making for contractors.Take charge of system reliability and performance, ensuring our platform is secure, observable, automated, and scalable to support our growth.Collaborate across engineering, product, and design teams to turn innovative ideas into elegant, user-friendly solutions.Continuously improve our technical standards and processes—from testing and deployment to documentation and code reviews—to enhance our development workflow.Foster a culture of craftsmanship and teamwork, contributing to the growth and learning of our team.Your ProfileYou are a high achiever who sets and maintains rigorous standards for yourself and your peers.You excel in collaborative problem-solving, adept at managing multiple priorities.You pursue simplicity and elegance in your solutions, knowing when to invest time and when to prioritize agility.You balance hands-on involvement with empowering your team to succeed.Qualifications3-6+ years of software engineering experience in a fast-paced environment.Familiarity with the NodeJS, React, AWS, and PostgreSQL tech stack is a plus.Authorization to work in the US is required.What We ProvideA collaborative and innovative work environment.

Role OverviewJoin OpenEvidence as a Fullstack Software Engineer, where you will take ideas from concept to execution, driven by the desire to create impactful solutions that will be utilized and appreciated by millions of discerning users globally.We seek exceptional builders who thrive beyond traditional boundaries. Our engineers engage across diverse products and projects, taking full ownership of their work to maximize impact.About OpenEvidenceOpenEvidence is the leading medical AI platform, recognized globally. In just over a year, we’ve achieved over 40% adoption among US clinicians, driven by product excellence and word-of-mouth referrals. With a valuation of $12 billion and a 30-member engineering team composed of talent from MIT, Harvard, and Stanford, we believe that transformative products stem from a small, dedicated group of autonomous builders who are empowered to take ownership and act swiftly. As we expand our team, we are poised to establish the standard platform for medical AI.If you are a top-tier engineer or scientist eager to shape the forefront of technology and deliver tangible outcomes that can positively influence hundreds of millions of lives, we want to connect with you.Our CultureWe believe in engaging at a world-class level. The journey from 0 to 1 and from 1 to 1000 is akin to a professional sport, where unwavering excellence is our benchmark. We understand that pioneering technologies require complete ownership. Significant achievements occur when individuals commit to making them happen.Who You AreIf your goal is simply to complete tasks from 9 to 5, this position is not for you. If you prefer academic writing, this role isn’t for you either. However, if you are ready to dive in, embrace challenges, and create something from scratch that has a direct impact on countless lives and drives substantial revenue, then you may be the right fit.The ideal candidate is a talented builder—intelligent, ambitious, resourceful, self-directed, meticulous, driven, and humble. Sound rare? It is, which is why we have only found 30 like-minded individuals, and we're eager to discover more.Work EnvironmentAll full-time engineering roles require in-person attendance five days a week in San Francisco or Miami.

Fullstack Software EngineerLocation: San Francisco (Hybrid - In-person 2-3 days per week)Compensation: $140,000 – $190,000 + Meaningful EquityAbout HomeVisionHomeVision is at the forefront of revolutionizing the $13 trillion mortgage industry with our cutting-edge AI-driven software. Our platform, MIRA, streamlines the manual review process of mortgage documents, allowing lenders to expedite loan closures with greater ease, ultimately benefiting borrowers by saving them time, money, and reducing stress. We have successfully transformed appraisal operations for leading lenders across the country, achieving a reduction in review times by over 75%. Our ambitious goal is to expand MIRA's capabilities to cover the entire loan file, automating income, asset, and credit analysis, to create a comprehensive underwriting solution for the industry.At HomeVision, we seek out intelligent, inquisitive, and thoughtful individuals who relish tackling complex challenges and embracing significant responsibilities. Our engineers manage substantial projects from inception to launch, working closely with product, design, and go-to-market teams. We prioritize humility, ownership, transparent communication, and mutual respect. Our ethos revolves around fostering a collaborative environment where we always strive to “do the loving thing” in our interactions with one another and our clients and partners.About the RoleWe are on the lookout for a Fullstack Engineer to integrate into our core product team in San Francisco. In this role, you will collaborate directly with our founders, designers, and machine learning engineers to construct the interfaces and infrastructure that drive MIRA. This is not a role focused on maintaining legacy code; instead, you will be responsible for architecting new features that facilitate understanding and action on complex AI-driven decisions by real users.What You Will DoShip Product End-to-End: Take ownership of features from database schema to user interface components. You'll create the interfaces that underwriters utilize to engage with our AI, rendering complex data intuitive and actionable.Architect for Scale: Design and implement robust solutions using Go and PostgreSQL to manage intricate loan file data, ensuring high availability and minimal latency as we scale to millions of documents.Bridge the AI Gap: Collaborate closely with our ML team to integrate AI services into our core SaaS platform, ensuring seamless transitions between our decisioning models and the user application.Elevate Engineering Culture: Foster continuous improvement by advocating for code reviews, crafting clean design documentation, and enhancing observability (metrics/logging) to maintain high velocity and stability in our production environment.

Join Sciforium, a pioneering AI infrastructure company, as we develop state-of-the-art multimodal AI models along with our proprietary, high-efficiency serving platform. With substantial multi-million-dollar funding and direct support from AMD engineers, our dynamic team is rapidly expanding to build the complete stack that powers cutting-edge AI models and real-time applications.About the RoleThis exciting position invites you to contribute to the essential systems that drive Sciforium’s multimodal AI models. You will play a vital role in constructing the model serving platform, utilizing C++, Python, runtime execution, and distributed infrastructure to establish a fast and reliable engine for real-time AI applications.This role offers hands-on experience in performance engineering, providing insight into how large AI models are optimized and deployed at scale. You will work in close collaboration with ML researchers and seasoned systems engineers. If you are passionate about creating exceptional Developer Experiences, are committed to performance excellence, and seek exposure to the entire AI stack, this position promises impactful work and significant growth opportunities.Your ResponsibilitiesInteractive AI Chat Interface: Design and implement a low-latency, chat-like interface for users to explore our LLMs.Developer Console: Develop the essential UI enabling users to generate API Keys, set budget limits, and visualize real-time usage graphs.Payments & Billing: Integrate Stripe or a similar service to manage complex subscription models.Documentation Portal: Create a dynamic API reference section for users.CLI/SDK Integration: Develop user-friendly client-side wrappers to facilitate seamless connections to our API endpoints.Backend APIs: Construct secure API gateways and implement low-latency streaming solutions.Ideal Candidate ProfileBachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience).3+ years of software engineering experience, focusing on front-end development.Strong proficiency in Typescript and Python.Familiarity with responsive design and UX fundamentals.Excellent collaboration and communication skills, with the ability to work effectively across engineering and ML teams.

About the RoleAs a pivotal technical founder, you will be responsible for crafting the entire product interface of Known. This includes developing an engaging mobile application, establishing backend systems for seamless matching and communication, and implementing API integrations that simplify the dating experience. You will create features that combine stunning user interfaces, intelligent data workflows, and third-party services to deliver a truly enchanting consumer experience.You will collaborate closely with the founding team, which includes experts in AI/ML, product development, and design, to transform innovative product concepts into functional code. This high-ownership position allows you to design systems, make significant technical choices, and directly influence how millions of users interact with Known.ResponsibilitiesDevelop and launch mobile applications using React Native that are fast, enjoyable, and user-friendly, covering everything from onboarding processes to real-time messaging and match exploration.Create and uphold backend services utilizing Node.js/TypeScript, including RESTful APIs, WebSocket connections for real-time chatting, and WebRTC integrations for audio and video functionalities.Integrate third-party solutions such as OpenAI/Anthropic LLMs, Apple/Google Pay, reservation systems, and SMS/push notifications to provide seamless, automated interactions.Collaborate with AI/ML engineers to present model outputs—like compatibility scores, tailored recommendations, and conversational agents—through intuitive user interfaces and efficient APIs.Manage infrastructure and deployments on contemporary cloud platforms, ensuring reliability, security, and scalability as the user base expands.Implement analytics and monitoring to evaluate user engagement, conversion pathways, and overall product health in real-time.Requirements3–5 years of experience in building production-level fullstack or mobile applications, preferably within consumer products or startup environments.Proficient in TypeScript, React, React Native, and Node.js.Demonstrated experience in designing and optimizing RESTful APIs with a focus on performance, security, and maintainability.Solid understanding of Postgres—comfortable with data modeling, query optimization, indexing, and database performance.Familiarity with cloud platforms (AWS, GCP, Vercel) for hosting and deployment.

Position OverviewJoin Onyx, a leading open-source project with a vibrant community of over 300,000 users, contributing to a platform that has garnered more than 13,000 stars on GitHub. As a Fullstack Engineer, you will have the chance to make a significant impact in a project that has the potential to reach millions globally. Your ContributionAs one of the early team members, you will be instrumental in defining our core product. Help us establish Onyx as the premier “GenAI for work” application worldwide. This role is based in our San Francisco office.Your responsibilities will include:Designing a user-friendly interface for our GenAI Chat, Enterprise Search, Agents, and Admin features.Enhancing backend functionalities and APIs to support our growing needs.Refining the search pipeline for better flexibility and quality, developing a semantic understanding of customer organizations, and improving permission and access controls.Implementing cutting-edge NLP techniques, such as LLM-based Knowledge Graphs and StructRAG, to broaden the system’s question-answering capabilities (AI/deep learning experience is not mandatory).Taking ownership of the entire development lifecycle of new features, from ideation to deployment.Collaborating closely with founders and the team to influence product direction and contribute to our engineering strategy. Success Factors1-5 years of practical software engineering experience in developing real-world applications.Proficiency in Typescript, React, NextJS, Python, and relational databases (Postgres).A passion for working in a dynamic startup environment with minimal processes.Strong communication skills and the ability to work collaboratively with both teammates and external stakeholders.⭐ Additional AdvantagesFamiliarity with Docker, Kubernetes, cloud platforms (AWS, GCP, Azure), and both on-premise and cloud deployments.An interest or experience in AI technologies (NLP, Deep Learning, GenAI) and information retrieval.Background as a founder or early engineer at a seed or series-A startup.

About WorkWhileAt WorkWhile, we are dedicated to transforming the lives of hourly workers by providing them with opportunities for better earnings and improved living standards. With over 80 million Americans engaged in hourly employment, the unpredictability of their schedules and minimal benefits often leads to financial uncertainty.Our mission is to revolutionize frontline work by fostering a flexible and efficient labor market. Leveraging AI technology, the WorkWhile platform allows businesses to swiftly connect with top-tier talent, while workers enjoy benefits such as same-day pay, complimentary telehealth services, professional development, and the freedom to select shifts that align with their skills and schedules.With the bold ambition to align interests and eliminate inefficiencies in the labor market, we are poised to disrupt a $650 billion staffing and recruiting industry. Supported by Khosla Ventures and recognized by Inc. 5000 for our remarkable growth, WorkWhile is setting the stage for the future of work.

About WorkWhileWorkWhile is dedicated to transforming the way hourly workers earn a living and improve their quality of life. With over 80 million Americans in hourly jobs facing unpredictable schedules, low wages, and limited benefits, we aim to provide financial stability through innovation.Our mission is to revolutionize frontline work by fostering a more flexible and efficient labor market. Utilizing AI technology, our platform enables businesses to swiftly connect with top-tier talent while offering workers same-day pay, complimentary telehealth services, opportunities for skill enhancement, and the freedom to select shifts that suit their skills and availability.With an ambitious goal to align incentives and address inefficiencies in the labor market, we are disrupting the $650 billion staffing and recruiting sector. Supported by Khosla Ventures and recognized by the Inc. 5000 for our remarkable growth, WorkWhile is reimagining the future of work.

Join Atomic SemiAt Atomic Semi, we are on a mission to revolutionize the semiconductor industry by creating an agile, state-of-the-art semiconductor fabrication facility.Harnessing the power of modern technology and innovative simplifications, we are dedicated to building our own tools for rapid iteration and enhancement.Our dynamic and collaborative team consists of top-notch engineers specializing in various domains such as mechanical, electrical, hardware, and computer engineering. We embrace the philosophy that we can manage everything from atomic elements to architectural designs.With a focus on quality and speed, we believe that smaller and faster is always better. We are committed to inventing solutions that meet our unique requirements, using a range of advanced technologies including 3D printers, sophisticated microscopes, e-beam writers, and a full spectrum of fabrication equipment.Founded by industry visionaries Sam Zeloof and Jim Keller, we are driven by a passion for innovation and excellence.Role OverviewAs a Fullstack Software Engineer, you will play a crucial role in developing our primary web application that operates the fab. Your focus will be on creating user-friendly features that empower process engineers to seamlessly interact with hardware, workflows, and data.

About UsAt doss, we are pioneering the future of operational efficiency with our innovative platform, often referred to as the “Terraform for operators.” We are developing an AI-driven schema layer that powers a customizable data warehouse, enabling physical-goods companies to rapidly adapt their record systems in alignment with the evolving pace of their business operations.Imagine leveraging AI foundation models for seamless schema migrations, achieving real-time observability across operational and financial data, managing complex git versioning for schema and data changes, and creating workflows that are as flexible as infrastructure code.Your RoleCollaborate closely with design teams and fellow engineers to rapidly develop intuitive and lightning-fast web experiences.Play a crucial role in shaping the technical roadmap by prioritizing features that enhance customer-facing experiences.Develop adaptable infrastructure and components that can scale in a composable software environment, similar to tools like Retool, Airtable, Zapier, and Figma.Design a versatile entity-attribute-value (EAV) data model and schema-as-code platform that supports customer instances while ensuring transactional integrity.Your SkillsAbility to initiate and execute projects in ambiguous environments, transitioning from zero to one.Proficient in Typescript, React, NextJS, and Tailwind CSS.Familiarity with GraphQL, Postgres, ORMs, and Node (Express).Comfortable utilizing internal APIs to construct complex front-end interfaces and components.Knowledge of various databases including Postgres, Elasticsearch, DuckDB, and Memgraph.Who You AreTeam Player: You foster positivity, openness, and curiosity within the team.Growth Mindset: You view every challenge as an opportunity to learn and enhance yourself, your team, and the organization.Craftsmanship: You take pride in delivering high-quality work.Customer-Centric: You prioritize the customer experience and aim to create delightful products.Pragmatic: You make informed decisions based on circumstances rather than strict theories.Low Ego: You thrive in collaborative settings where team support is paramount.

About UsAt 3Y Health, we are pioneering AI-driven software solutions to empower healthcare providers and streamline the staggering administrative complexity that consumes 40% of the industry’s revenue. Our comprehensive platform unveils opportunities for clinician entrepreneurs, enabling medical professionals to successfully launch, operate, and expand private practices. By equipping these independent practices with cutting-edge AI and automation, we’re assisting providers in reclaiming their time, nurturing successful businesses, and delivering enhanced outcomes for their communities. Backed by over $200M from esteemed investors such as Founders Fund, General Catalyst, Softbank, and 8VC, we are on a mission to revolutionize healthcare.About the RoleWe are in search of a skilled Fullstack Engineer to help us develop intuitive and high-performance user interfaces that resonate with our providers. The ideal candidate will be a product-oriented engineer with extensive expertise in modern web technologies (React, TypeScript, Node) and a keen eye for design and user interaction excellence. You have a passion for writing clean, modular code and can collaborate effectively with design and product teams to bring beautiful experiences to fruition. Candidates with experience as a founding engineer or founder are especially desirable, as we value a strong sense of ownership, speed, and a commitment to continuous iteration.This position requires a dynamic individual capable of steering architectural decisions and collaborating cross-functionally with engineering, design, and product teams. As a Fullstack Engineer, you will play a key role in delivering scalable systems, collaborating on product development, and shaping the user experience of our practice management platform.ResponsibilitiesDevelop and maintain reusable, high-performing, and accessible frontend components utilizing React and TypeScript.Collaborate closely with designers to create stunning, user-focused experiences.Own the UX refinement and interaction quality; consistently seek opportunities to enhance usability.Partner with backend engineers to define API interfaces, and occasionally implement backend logic as necessary.Shape frontend architectural decisions and advocate for best practices in code modularity and maintainability.Engage in code reviews, technical discussions, and team rituals.Adopt a founder’s mindset—be proactive, product-focused, and eager to take ownership.

Join Influencer Marketing's FutureAt influur, we are pioneering the world's first autonomous AI agent tailored for influencer marketing, designed to transform the way campaigns are developed and executed.This is not just another tool or platform; our agent seamlessly transitions from campaign conception to execution, connecting with 50 influencers within a week—all with minimal human oversight.Why We Matter: With three years of exclusive data on viral influencer content, we are trusted by industry giants like Warner, Sony, and Universal to elevate their top artists. Our roster of backers includes notable figures such as Sofia Vergara and Karol G, as well as esteemed venture capitalists like Point72 Ventures. We are committed to delivering production-ready AI that is already generating substantial revenue.What Sets Us Apart: Our unique advantage lies in our dual capability: we possess both extensive data on influencers and direct connections with them. In the realm of AI, this combination creates an insurmountable competitive edge.Timing is Everything: With AGI agents poised to disrupt the workforce by 2027, we have a crucial 12 to 18 months before the market becomes saturated. We are currently defining the category of social media viral agents.Your Opportunity: We seek passionate young professionals who are ready to invest in a transformative journey. We're offering significant equity for those eager to shape the future of AI in influencer marketing and secure a substantial stake in it.

About Ivo Inc. Ivo Inc. builds generative AI technology for the legal sector. Based in San Francisco, the team focuses on practical solutions that help legal professionals work more efficiently. The company’s platform automates and streamlines contract analysis, document editing, and risk detection for in-house legal teams. Recent Engineering Projects AI agents that integrate with MS Word for automated document editing (2023) Shifting from generic embeddings to agentic RAG for better accuracy (2023) Large-scale LLM-based legal fact extraction (2024) Legal assistant for searching large contract databases with high precision (2024) Clustering legal documents from the same source for improved organization (2025) Automatic deviation analysis to surface hidden risks in contract archives (2025) System for merging contracts and amendments into unified composite contracts (2025) Role Overview: Staff Software Engineer - Fullstack This role focuses on designing and building full-stack features using generative AI. Staff Engineers at Ivo work across the stack and partner closely with product, design, and legal experts. What You Will Do Design and implement full-stack generative AI features Build high-performance user interfaces and backend systems that process millions of legal contracts Create and maintain data pipelines that coordinate LLMs, data extraction, and clustering at scale Work with designers, legal professionals, and engineers to improve legal workflows with AI Our Mission Ivo’s goal is to help in-house legal teams reclaim time from repetitive work. The team uses advanced LLMs to automate tedious legal tasks, so lawyers can focus on higher-value work. The platform’s impact is clear: Ivo holds an 85% trial win rate, the highest in the market, and receives consistently positive user feedback.

Calling All Ambitious Fullstack Engineers!At Silver.dev, we are on the lookout for talented fullstack engineers who aspire to relocate to San Francisco. Our clients are ready to sponsor immigration visas, including O1, J1, and potentially L1 visas, tailored to the unique skills and profiles of exceptional candidates.This journey is not for the faint of heart. It demands resilience, unwavering dedication, and the ability to outperform local talent in quality and innovation. Only the most skilled and determined individuals will succeed in this competitive environment.If you believe you have what it takes, we invite you to join Silver.dev and showcase your expertise.

About KreaAt Krea, we are revolutionizing the world of creativity through next-generation AI tools designed specifically for creatives. Our mission is to empower artistic expression by making AI intuitive and manageable, ensuring it enhances rather than replaces human creativity.We envision AI as a versatile medium that enables self-expression across diverse formats including text, images, video, sound, and even 3D. At Krea, we are dedicated to developing smarter tools that harness this exciting medium effectively.Your Role:Develop and sustain APIs and user interface flows for web and mobile applications using Svelte/SvelteKit and TypeScript.Create engaging and responsive front-end experiences, including drag-and-drop functionality, real-time canvas interactions, and seamless UI animations.Enhance front-end performance by minimizing render latency, utilizing virtual DOM techniques for profiling, and ensuring smooth WebSocket image streams.Design and maintain backend services using Node.js, along with database models incorporating Postgres and Redis caching strategies.Initiate a Public API project aimed at making Krea's AI models accessible to millions of developers.Troubleshoot HTTP/3 and WebSocket issues from both client and server perspectives.Drive real-time image and video generation pipelines with low-latency APIs.Improve system observability and alerting using OpenTelemetry tools.Implement enterprise-level features such as Audit Logs, SAML/SSO, and SCIM provisioning.Bonus: Scale our infrastructure architecture by leveraging your deep understanding of AWS EKS GPU clusters or Kubernetes operators.

About FormalAt Formal, we are revolutionizing data security with our cutting-edge platform designed to empower teams to effortlessly understand and manage their data.We are developing an advanced protocol-aware reverse-proxy for data stores and APIs that enables organizations to gain real-time insights into their data. This innovative approach allows teams to monitor how sensitive data is stored, accessed, and utilized, thereby enforcing strict least privilege policies through techniques such as data masking, filtering, and anonymization.Our solutions have earned the trust of industry leaders like Ramp, Gusto, and Notion, who rely on us for data security, compliance, data quality management, and infrastructure access.Backed by top-tier venture capital firms, including Thrive Capital and Y Combinator, we also enjoy the support of angel investors who are executives and founders from renowned companies like Datadog, Clickhouse, Plaid, and Vanta.About the RoleFormal is committed to assembling an exceptional engineering team, and we seek passionate individuals who are eager to make a significant impact on our product and company growth.The ideal candidate possesses a profound knowledge of building scalable systems, a strong sense of ownership, and thrives on overseeing projects from their inception to full-scale production.Our current technology stack includes Typescript, NextJS, Shadcn, Vercel, and Golang.Your ResponsibilitiesDrive continuous improvements in the performance and reliability of our frontend application through code optimization and enhancement identification.Elevate existing features by integrating user feedback and executing enhancements to usability and design.Assume ownership of the frontend architecture, ensuring it is scalable, maintainable, and aligned with industry best practices.Lead initiatives that you believe will significantly impact Formal's success.Key QualificationsDemonstrated experience in software development for data-intensive platforms.Strong proficiency in modern frameworks (e.g., React, Vue.js) and backend languages (we utilize Go). Familiarity with streaming data processing frameworks like Apache Kafka and Google Pub/Sub.Experience with essential infrastructure components such as Kubernetes.

About DEUNA DEUNA is an innovative and fast-growing startup that is transforming global commerce with our cutting-edge AI-driven orchestration and payments platform, ATHIA. This powerful tool is designed to assist large enterprises in enhancing approval rates, minimizing costs, and discovering new revenue streams. Created by the talented team behind DEUNA—the fastest-growing Commerce OS in Latin America—ATHIA seamlessly integrates payment intelligence, checkout optimization, and data orchestration into one cohesive solution.With extensive integrations across more than 300 PSPs and alternative payment methods, and with over 20% of Mexico’s digital economy flowing through our platform, we simplify global payments through a single integration and centralized reconciliation process.As we rapidly expand into the U.S. market to address the pressing needs of large retailers, marketplaces, airlines, and quick-service restaurants (QSRs), we invite you to join us in shaping the future of payments! Visit https://www.deuna.com/ to learn more about us!

About NiumNium is at the forefront of global infrastructure for real-time cross-border payments. Our mission is to shape the future of payments by providing the infrastructure needed for instantaneous money transfers across the globe. Our platform empowers banks, Fintechs, and global enterprises to move money effortlessly, anywhere.With dual headquarters in San Francisco and Singapore and a presence in 14 markets worldwide, we are embarking on a thrilling phase of growth. In July 2025, we achieved record revenue and transaction volumes, marking our largest month in a decade. Nium currently manages nearly $50 billion in payments annually, primarily for enterprise clients, while maintaining a robust financial position.Now is an exciting time to join our team as we continue to innovate and expand.Our payout network spans over 190 countries and 100 currencies, facilitating real-time transfers to accounts, wallets, and cards. We support local collections in 35 markets and have a card issuance business active in 34 countries. With regulatory licenses in more than 40 markets, we simplify the onboarding process for our partners, enabling them to scale globally. Our commitment to growth and innovation has earned us accolades as one of CNBC’s World’s Top Fintech Companies 2025, along with several awards for our cross-border payment solutions.In 2024, we secured $50 million in Series E funding, achieving a valuation of $1.4 billion to further enhance our network and product offerings. With the B2B payments market expected to reach $175 trillion by 2030, Nium presents ambitious builders with the opportunity to redefine the landscape of global money movement.

Join Mercor: Pioneering AI and Labor Market IntegrationAt Mercor, we operate at the forefront of labor markets and artificial intelligence (AI) research. Collaborating with esteemed AI laboratories and businesses, we deliver the invaluable human intelligence needed for AI evolution.Our extensive network of talent trains cutting-edge AI models, similar to the way educators guide students—by imparting insights, experience, and context that coding alone cannot convey. Currently, over 30,000 experts in our network collectively generate more than $2 million daily.Mercor is pioneering a new realm of work where expertise accelerates AI progress. To realize this vision, we seek an ambitious, dynamic, and dedicated team. You’ll collaborate with researchers, operators, and AI enterprises that are redefining societal systems.As a profitable Series C company valued at $10 billion, we maintain a five-day in-person work schedule at our new San Francisco headquarters.Your RoleWe are on the lookout for a product-focused Fullstack Software Engineer with robust technical expertise and a keen sense for product design. This position is perfect for individuals who relish taking ownership of user-facing features from conception to deployment, while possessing a deep understanding of the business and market dynamics that underpin their creations.In this role, you will enhance core marketplace interfaces that influence how engineers discover Mercor, apply for opportunities, complete assessments, and ultimately earn income. Achieving success here requires sound judgment, comfort with ambiguity, and the knack for delivering high-quality experiences swiftly without unnecessary complexity.This is not a limited backend or frontend role; your responsibilities will span:Frontend: React / Next.js, user journeys, UX nuances, performance, and refinement.Backend: Python and Go services, APIs, data structures, and integrations.Data: MongoDB and SQL, metrics, funnel analysis, and operational integrity.By the end of the process, you will be matched with a team where you can make the greatest impact in one of the following areas:Talent Platform Side – Developing next-gen tools that automate end-to-end recruitment, intelligently connect candidates to roles, and facilitate global hiring with seamless contracts and payments.Applied AI/Human Data Side – Collaborating with top-tier AI researchers from leading labs like OpenAI, Anthropic, and Google to create post-training datasets that enhance foundational model capabilities.

About UsLightning AI is the driving force behind PyTorch Lightning, established in 2019. We are dedicated to creating an all-inclusive platform for developing, training, and deploying AI systems, aimed at facilitating the transition from research to production seamlessly.Our merger with Voltage Park, an innovative neocloud and AI Factory, allows Lightning AI to deliver developer-centric software alongside cost-effective, large-scale computational resources. We provide teams with the essential tools for experimentation, training, and production inference, all while ensuring security, observability, and control are inherently integrated.We cater to individual researchers, startups, and large enterprises alike. With a global footprint, Lightning AI has offices in New York City, San Francisco, Seattle, and London, and is proudly supported by Coatue, Index Ventures, Bain Capital Ventures, and Firstminute.Our Core ValuesAct Swiftly: We prioritize speed and clarity, breaking down complex challenges into manageable steps.Concentration: We focus on one objective at a time, working collaboratively as a team to deliver features with precision.Equilibrium: We believe that sustained performance is achieved through rest and recovery, promoting a healthy work-life balance.Excellence: We innovate through mastery. Every detail matters, and we take pride in our craftsmanship.Simplicity: We drive our innovation through simplicity, eliminating unnecessary complexities and concentrating on what is truly essential.Position OverviewWe are seeking a Fullstack Engineer to enhance and scale the Lightning AI platform, covering everything from the frontend and CLI, to API, billing, security, and integrations.The ideal candidate will take ownership of key features and oversee development from conception to completion while collaborating with a highly skilled team of engineers, product managers, and designers. Here, you will transition from proof of concept to deployment, emphasizing speed, quality, and iterative improvement.This is your chance to create revolutionary technology that will reshape the machine learning landscape! This hybrid role is based in our San Francisco office, requiring in-office attendance 2 days per week. The salary range for this position is $120,000 to $250,000.