Staff Fullstack Engineer at Nium | San Francisco

At CreatorIQ, we are the leading operating system for creator-led growth, trusted by over 1,300 brands and agencies globally. Our mission is to humanize business and amplify individual impact through our core values: intentionality, excellence, collaboration, and humanity. Recognized as one of the best companies to work for by BuiltIn LA and NY, we have been…

At CreatorIQ, we are dedicated to revolutionizing creator-led growth, empowering over 1,300 global brands and agencies to thrive.Our mission is to humanize businesses while amplifying the impact of individuals. Guided by our core values—intentionality, excellence, collective journey, and humanity—we have been recognized as one of the best workplaces by various programs, including BuiltIn LA and NY. Our growth story includes being named one of the Fastest-Growing Companies in North America by Deloitte Technology Fast 500™ for four consecutive years, and being highlighted as a leader in IDC MarketScape: Worldwide Influencer Marketing Platforms for Large Enterprises in 2025, among others. Our flexible work model fosters collaboration and innovation, accommodating diverse working styles.Join us in our exciting journey. Become a vital part of our dynamic team and help transform the industry!Senior Full Stack Engineer, Creator RecruitWe are looking for a talented Senior Full Stack Engineer to enhance our Creator Tools team. Your contributions will significantly improve user experiences and help us develop scalable solutions for our expanding platform.The ideal candidate will possess a strong background in frontend frameworks, solid backend development skills, and a collaborative spirit suited for a fast-paced environment. You should be ready to take ownership of features, contribute to architectural decisions, and maintain high coding standards.The Creator Tools team is responsible for developing all user-facing features on our platform, directly impacting the lives and livelihoods of creators who utilize our tools to earn and sustain their businesses.From payment processing and social authentication to e-commerce solutions and campaign workflows, we enable the full creator experience. Every feature you develop and enhancement you implement is integral to delivering a seamless, intuitive platform that empowers creators to grow and earn with confidence.This role allows you to make an immediate and meaningful difference in the lives of creators who rely on our platform to pursue their passions.

Join Giga's Innovative TeamAt Giga, we're on the cutting edge of technology, having successfully raised $61 million in Series A funding. Our pioneering real-time AI agents are designed to understand emotions, resolve customer issues instantaneously, and scale across some of the largest enterprises globally. We are proud to serve notable clients, including DoorDash.As we stand at a crucial turning point in our journey, we invite talented engineers to join us in achieving our vision of becoming the leading AI platform for enterprise automation, powered by our voice superintelligence.The work we do impacts millions daily, providing our engineers with the autonomy to shape their projects and make a tangible difference. With visionary founders, a successful business model, and a clear roadmap for future growth, this is an extraordinary opportunity to join a generational company.Learn more about us through these articles:Voice AI startup Giga raises $61M Series ADoorDash and Giga PartnershipYour Role as a Staff Backend EngineerWe are seeking a Staff Backend Engineer to be a key player in defining the technical strategy of our backend systems. You will be responsible for leading complex projects, making pivotal architectural decisions, and elevating engineering standards across our team.This position is tailored for those who want to be builders at heart. You will write code, take ownership of systems, and deliver results while also looking ahead to determine future development directions for our team.Key ResponsibilitiesYou will spearhead technical initiatives across the organization, including:System architecture: Innovating our agent infrastructure to seamlessly scale while balancing speed, reliability, and complexity.Challenging technical problems: Leading high-stakes projects where the consequences of failure could significantly impact our business.Technical strategy: Proactively identifying system gaps and proposing solutions to enhance our platform.

About DEUNA DEUNA is an innovative startup transforming the landscape of global commerce with our groundbreaking AI-driven orchestration and payments platform, ATHIA. Our solution empowers large enterprises to enhance approval rates, minimize costs, and discover new revenue streams. Developed by a team recognized as the fastest-growing Commerce OS in Latin America, ATHIA integrates payment intelligence, checkout optimization, and data orchestration into a unified solution.With robust integrations across over 300 payment service providers and alternative payment methods, and with more than 20% of Mexico’s digital economy processed through our platform, we simplify global payment processes via a single integration and centralized reconciliation.As we expand into the U.S. market to fulfill the pressing requirements of large retailers, marketplaces, airlines, and quick-service restaurants (QSRs), we invite you to join us in shaping the future of payments! Role OverviewWe are on the lookout for a Backend Staff Engineer who will serve as a technical expert and architectural leader for our backend systems. This position focuses on tackling complex engineering challenges, scaling distributed systems, and establishing backend engineering standards across the organization.This is not a management role; instead, you will act as a technical authority, collaborating with Engineering Managers while taking charge of technical depth and backend architecture decisions. You will thrive in a dynamic startup environment where backend systems are critical to product capabilities.Key ResponsibilitiesBackend Architecture & System Design- Create and enhance scalable, secure, and resilient backend systems.- Architect high-availability APIs and distributed services.- Establish best practices for reliability, observability, and performance.Deep Technical Contribution- Write high-quality, production-ready backend code.- Lead refactoring initiatives and performance enhancements.- Identify system bottlenecks and implement scalable solutions.- Design data models, caching strategies, and asynchronous workflows.Technical Influence- Provide technical guidance across teams.- Facilitate complex design discussions and evaluate trade-offs.- Enhance backend development standards and documentation practices.Scalability & Reliability- Design systems capable of managing high-traffic and transaction-intensive workloads.- Define strategies for load balancing, scaling, monitoring, and failure management.- Optimize system instrumentation and monitoring practices.

About UsScribe is a dynamic company where outstanding talent thrives. With over 94% of the Fortune 500 relying on our platform, we empower teams to accomplish their tasks efficiently while continuously improving their workflows. Our innovative Workflow AI technology streamlines and enhances processes, enabling teams to work smarter and more consistently.Since our inception in 2019, we've experienced rapid growth, amassing over 5 million users across 600,000 businesses. Based in the heart of San Francisco, we have been recognized as a LinkedIn Top Startup and are valued at over $1 billion, supported by premier investors. Join us in transforming the way people approach their work.Our Work CultureWe are passionate builders dedicated to honing our skills. Our team values collaboration and shared success, embracing principles such as:Accelerating impactRaising the barEmpowering our usersClear communication is kindFostering rapid learningOne team, one visionAbout This RoleWe are seeking a talented and seasoned backend engineer to become a Staff Engineer on our Core Engineering team. This pivotal group is responsible for the most critical user experiences at Scribe, encompassing functionalities like viewing and editing Scribes, managing Pages, Embeds, Exports, and supporting essential Integrations. Your contributions will directly enhance how users create, share, and leverage documentation, significantly improving their effectiveness.If you are driven by a passion for addressing real user challenges and approaching problems with both practicality and elegance, this is your chance to work closely with designers, user advocates, and engineers across the technology stack to shape the future of Scribe. As a Staff Engineer, you will play a vital role in system design, elevate our engineering culture, and mentor fellow engineers.Your Responsibilities Will IncludeLeading the development of new features within our Django monolith, focusing on core experiences such as viewing and editing Scribes, Pages, Embeds, Exports, and related Integrations.Enhancing database queries, endpoints, and caching layers to boost performance and scalability in critical user workflows.Collaborating across teams to ensure seamless integration and user experience.

Join Us at ApiphanyAt Apiphany, we are at the forefront of foundational AI technology, driving innovation in physical product development. Our mission is to support global leaders in automotive, aerospace, medtech, and energy sectors by transforming complex, unstructured technical data into actionable insights in real-time. With investment from notable firms like Markforged, Databricks, GM, and Character, we aim to redefine engineering decision-making, simplifying complexity for top-tier manufacturers worldwide.Our cutting-edge models are designed to tackle the intricacies of engineering and manufacturing, incorporating a deep understanding of physics, design specifications, and program constraints. We are a compact yet highly skilled team composed of builders from prestigious institutions including Stanford, Berkeley, MIT, UW, and CMU, alongside industry veterans from GM, Ford, and Genesis Therapeutics. Together, we share a passion for revolutionizing hard-tech and establishing a company that sets the standard in our field.Your RoleIn the role of Senior / Staff Backend Engineer at Apiphany, you will take charge of designing, building, and scaling the essential systems that drive our intelligence platform. You will be responsible for developing low-latency backend services and APIs capable of processing extensive engineering data streams, maintaining security and compliance, and architecting systems for optimal performance and availability. Additionally, you will influence long-term architectural decisions, guide your colleagues through mentorship, and establish best practices for scaling backend services to deliver robust and high-performance applications.

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 our dynamic team at Lightfield as a Staff Engineer specializing in Backend Systems. We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to innovate and contribute to the design and implementation of our backend architecture. You will collaborate closely with cross-functional teams to deliver high-quality solutions that enhance our products and services.

P-150 At Databricks, we are dedicated to empowering data teams to tackle some of the world's most challenging problems, ranging from security threat detection to the development of cancer treatments. We achieve this by creating and managing the leading data and AI infrastructure platform, allowing our clients to concentrate on the high-value challenges central to their missions. Founded in 2013 by the original creators of Apache Spark™, Databricks has evolved from a modest office in Berkeley, California, to a global enterprise with over 1000 employees. Our platform is trusted by thousands of organizations, from startups to Fortune 100 companies, establishing us as one of the fastest-growing SaaS firms worldwide. Our engineering teams design and develop highly technical products that meet significant real-world needs. We continually push the limits of data and AI technology while maintaining the resilience, security, and scalability essential for our customers' success on our platform. We operate one of the largest-scale software platforms, comprising millions of virtual machines that generate terabytes of logs and process exabytes of data daily. Given our scale, we frequently encounter cloud hardware, network, and operating system faults, and our software must effectively shield our customers from any disruptions. As a Software Engineer focused on backend development, you will collaborate closely with your team and product management to prioritize, design, implement, test, and operate microservices for the Databricks platform and products. This role includes writing software in Scala/Java, building data pipelines using Apache Spark™ and Apache Kafka, integrating with third-party applications, and interacting with cloud APIs such as AWS, Azure, CloudFormation, and Terraform. Below are examples of teams you can join: Data Science and Machine Learning Infrastructure: Develop services and infrastructure that bridge the gap between machine learning and distributed systems. Our technology supports flagship collaborative workspaces, notebooks, IDE integrations, and project management tools. We also facilitate large-scale machine learning through environment management, distributed training, and lifecycle management via MLflow. Compute Fabric: Construct the resource management infrastructure that supports all big data and machine learning workloads on the Databricks platform in a robust, flexible, secure, and cloud-agnostic manner. This software oversees millions of virtual machines.

Join Saris AI as a Staff Backend Software Engineer, where you will play a pivotal role in developing innovative solutions that harness the power of artificial intelligence. In this dynamic position, you will collaborate with cross-functional teams, design scalable systems, and contribute to the overall architecture of our backend solutions.

About SemgrepSemgrep is at the forefront of code security, empowering developers to innovate seamlessly. Our platform enables teams to identify, flag, and resolve genuine issues before deployment, all while leveraging an adaptive security framework that evolves as developers code. Semgrep integrates security into the development process without hindering productivity, offering developers the autonomy to work efficiently while ensuring security teams maintain oversight, control, and assurance. With advanced AI capabilities that minimize false positives and prioritize actionable vulnerabilities, we have earned the trust of 95% of security reviewers across over 6 million findings. Semgrep is committed to achieving zero false positives, significantly reducing the workload for AppSec teams by enabling them to triage 80% fewer false alerts across both Code and Supply Chain, effectively managing their backlog.Founded in San Francisco and supported by prominent investors such as Menlo Ventures, Felicis Ventures, Lightspeed Venture Partners, Redpoint Ventures, and Sequoia Capital, Semgrep has been recognized by Gartner in the Application Security Testing sector and is trusted by leading organizations including Snowflake, Dropbox, and Figma. Discover more at semgrep.dev.About the RoleAs a Staff Backend Engineer, you will design, build, and maintain robust backend and infrastructure systems, ensuring a fast and reliable experience for our users. You will collaborate closely with fellow engineers to develop the APIs, data models, and services that drive Semgrep’s products at scale. A solid understanding of databases, query optimization, and distributed systems is essential, along with experience in integrating third-party solutions into existing codebases.Our technology stack includes TypeScript and React for the frontend, while the backend is powered by Python, Flask, and SQLAlchemy, all deployed through Kubernetes and hosted on AWS. Prior experience with these technologies is preferred, but a willingness to learn is equally valued!This is a hybrid role, with an expectation of in-office presence 3 or more days a week in our San Francisco, New York, Boston, or Denver offices, depending on your team. Remote work may be considered for exceptional candidates.CompensationThe estimated annual salary range for this position is between $202,000 and $238,000 USD. The actual salary will be based on various factors, including job-related skills, relevant experience, qualifications, location, internal equity, and market data. In addition to the base salary, total compensation may include equity, variable compensation, and benefits. We consider equity a vital part of our overall compensation package.

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.

About Cogent SecurityCogent Security is an innovative Applied AI Lab pioneering the future of AI agents in the realm of cybersecurity. In a world where cyber threats evolve at unprecedented speeds, our 'AI Taskforce' analyzes vast amounts of enterprise data to proactively address vulnerabilities and avert critical breaches.We remain at the forefront of technology by merging cutting-edge research with practical applications. Our dedicated Cogent Research team fuels our mission, ensuring we develop truly effective security workflows powered by AI.Since our inception, Cogent has rapidly grown, collaborating with Fortune 500 companies to safeguard the most intricate production environments globally.Supported by Greylock, our team comprises some of the brightest minds in applied AI, including experts from:Renowned universities such as Stanford, Berkeley, Penn, Duke, Carnegie Mellon, and Waterloo.High-growth unicorn companies like Scale AI, Databricks, Stripe, Tesla, and Coinbase.Leading cybersecurity specialists from Wiz, Abnormal AI, and Zscaler.Prestigious research institutions including DeepMind and SAIL.About the RoleAs we embark on building a suite of backend services and integrations with our design partners, we seek passionate and skilled Backend Engineers at both Senior and Staff levels, eager to thrive in the Applied AI domain.ResponsibilitiesDesign and implement critical backend subsystems and integration platformsComprehend business objectives and customer requirements to engineer backend subsystems that align with our technology strategies.Adapt systems to meet evolving needs of design partners and clients.Incorporate non-functional requirements such as compliance and security into system design.Establish scalable infrastructure foundationsPrepare for future growth in customer base, headcount, and data management by collaborating with your team to enhance infrastructure.

At Siftstack, we are revolutionizing the way advanced machines are constructed, tested, and managed. Our innovative platform provides engineers with real-time visibility into high-frequency telemetry, removing obstacles and facilitating quicker and more dependable development.Siftstack emerged from our extensive experience at SpaceX working on projects such as Dragon, Falcon, Starlink, and Starship, where the challenges of scaling telemetry, debugging flight systems, and ensuring mission reliability necessitated the creation of groundbreaking infrastructure. Founded by a team with backgrounds in SpaceX, Google, and Palantir, Siftstack is engineered for mission-critical systems where accuracy and scalability are essential.As a pivotal engineer focused on our data infrastructure, you will not only write code but also shape core architecture and contribute to scaling a real-time telemetry platform from the ground up. You will tackle intricate backend systems designed to capture, store, and serve millions of high-frequency data points per second, accelerating iteration cycles for some of the most advanced engineering teams globally.

Role overview Patreon is seeking a Staff Software Engineer specializing in Backend Platform for its San Francisco office. The position centers on designing and building scalable backend services that support and enhance the experience for creators using Patreon. What you will do Design and implement backend systems that can grow alongside Patreon's expanding user base Partner with engineers, product managers, and other teams to deliver reliable and user-friendly platform features Help guide technical decisions that influence the future direction of Patreon's backend architecture Collaboration This role works closely with cross-functional teams to ensure the platform addresses both technical requirements and user needs.

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 Cogent SecurityCogent Security is pioneering the future of cybersecurity through Applied AI, creating advanced AI agents designed to combat rapidly evolving cyber threats. Our AI Taskforce analyzes vast datasets to neutralize potential breaches before they impact our clients.Our commitment to innovation combines cutting-edge research with practical application, ensuring our solutions are at the forefront of technology. In addition to our product development, Cogent Research acts as our applied AI laboratory, supplying the expertise required to create highly effective security workflows.Since our launch from stealth mode, Cogent has seen remarkable growth, collaborating with Fortune 500 companies to secure some of the most intricate production environments globally.Backed by Greylock, our team consists of exceptional talents from leading universities such as Stanford, Berkeley, and Carnegie Mellon, as well as high-growth companies like Scale AI and Tesla, and cybersecurity experts from stalwarts like Wiz and DeepMind.

Join Plaud as a Backend Engineer and be part of an innovative team driving the future of technology. You will design, develop, and maintain scalable backend systems that enhance our product offerings and improve user experiences. This is an exciting opportunity to work with cutting-edge technologies and collaborate with talented professionals in a fast-paced environment.