Staff Software Engineer - Backend at 3Y Health | San Francisco

About UsAt 3Y Health, we are revolutionizing healthcare management through our innovative AI-powered business manager, designed to simplify the complexities of healthcare administration that consume nearly 40% of industry revenue. Our robust platform empowers clinician entrepreneurs to establish, operate, and expand their private practices. By equipping inde…

Location: This position is remote-friendly, with a preference for candidates located in the San Francisco Bay Area, Los Angeles, New York City, or the Pacific Northwest.About SleeperSleeper is dedicated to uniting sports enthusiasts through engaging games and a vibrant community. As one of the fastest-growing platforms in the fantasy sports and real-money gaming sector, we are revolutionizing the way sports fans interact—whether it’s through season-long leagues, pick’em contests, or dynamic real-time experiences with friends.Our team is nimble, passionate, and focused on product excellence. We are obsessed with user experience and firmly believe that creating delightful, swift, and dependable products is the key to our growth. Supported by renowned investors in Silicon Valley, including Andreessen Horowitz and General Catalyst, we are shaping the future of sports engagement.About the RoleWe are searching for a Staff Software Engineer - Backend who will play a crucial role in scaling the foundational systems that support our fantasy sports and Daily Fantasy Sports (DFS) offerings. In this position, you will lead architectural decisions, construct essential backend services, and mentor fellow engineers as we expand to accommodate tens of millions of enthusiastic sports fans.As a senior technical leader, you will work collaboratively across teams to bring innovative features to life—from real-time contest engines and game logic to personalized content and secure, seamless payment systems. You will have the autonomy to take ownership of significant components of the backend stack and help define excellence in performance, scalability, and reliability at Sleeper.What You’ll DoDesign and develop core backend systems that drive Sleeper's games and real-time user experiences, including fantasy contests, Sleeper Picks, user profiles, leaderboards, and more.Create scalable, distributed systems that can manage millions of concurrent users with minimal latency and maximum availability.Lead backend projects from ideation to deployment, ensuring clean interfaces, thorough documentation, and resilient infrastructure.Enhance system performance and proactively identify bottlenecks through monitoring, profiling, and capacity planning.Collaborate with product, design, and frontend teams to deliver features that delight our users.Guide engineers, conduct insightful code reviews, and help develop backend engineering best practices and standards.Foster innovation, technical direction, and team culture as a vital engineering voice in leadership.Who You AreYou possess a robust background in backend development, with proficiency in relevant programming languages and frameworks.You have a strong understanding of system architecture and distributed systems.You are passionate about creating high-quality user experiences and delivering impactful features.

About FinchAt Finch, we are dedicated to transforming the employment landscape by creating the foundational systems that enhance every aspect of work. We seek innovative thinkers who approach challenges with a comprehensive mindset, driven by curiosity and a passion for executing ideas from concept to realization.As a Series B company, Finch is supported by an impressive array of investors and advisors, including General Catalyst, Menlo Ventures, and notable tech industry leaders from Plaid, Brex, and more.About Our TeamOur team is composed of dedicated problem solvers who thrive on questioning the status quo. We prioritize speed, curiosity, empathy, and diverse perspectives. Every member is enthusiastic about the impact our solutions can have on the global workforce, and we recognize the immense responsibility that comes with providing value, which is why security and privacy are our top priorities.We embrace a variety of backgrounds and skills within our team. We encourage you to apply even if your experiences don't align perfectly with the job description; your unique skills and potential are what truly matter, especially if your career path has had remarkable turns.About YouYou excel in deconstructing intricate problems to create seamless customer experiences. You possess a blend of technical acumen and interpersonal skills, characterized by a high level of empathy. You thrive in uncertain environments and can distill complex issues into actionable engineering solutions.You effectively collaborate with product, engineering, and support teams to ensure that you are delivering the optimal solution for the right challenges while keeping all stakeholders aligned. Your commitment to your customers and colleagues drives your desire for collective success.You are adaptable and ready to take action, excited by the opportunity to work on an API product that fuels some of the most impactful applications worldwide.

About UsAt XOXO, we are a pioneering research lab dedicated to crafting intelligent interfaces that enhance everyday life. Our stealth team, comprising passionate engineers, designers, and researchers, is committed to solving unique challenges that affect life beyond the workplace.With recent advancements in our infrastructure, architecture, and model layers, we are seeking exceptional builders to create the interface and application layers that will turn our innovative vision into reality.About the RoleWe are looking for a skilled backend engineer to design, develop, and maintain high-quality production-grade backend systems. This position is ideal for a candidate with a strong foundation in cloud infrastructure, distributed systems, observability, and data persistence, where testing and stability are central to your approach.You will be responsible for overseeing backend projects from conception to production launch, ensuring a strong emphasis on performance, reliability, infrastructure efficiency, and security throughout the entire development lifecycle.What You’ll DoDevelop and manage backend services and distributed systems in a production environment using AWS or GCP.Architect data storage and retrieval systems utilizing a balanced combination of vector, OLAP, SQL, NoSQL, caching, and search technologies.Establish and maintain observability through monitoring, logging, tracing, and alerting to ensure system health and performance.Create and execute comprehensive test frameworks that address deployment and runtime failure scenarios.Lead backend projects from start to finish, focusing on complex feature development, CI/CD, Terraform implementation, stability, and security.

About HiveHive is at the forefront of cloud-based AI innovations, offering cutting-edge solutions that enable organizations to understand, search, and generate content with unparalleled efficiency. Trusted by industry giants, we empower developers through a diverse suite of pre-trained AI models, handling billions of API requests monthly. Our proprietary AI models and datasets power transformative applications across various sectors, enhancing content moderation, brand protection, sponsorship analytics, and context-driven advertising strategies.With over $120M raised from top-tier investors such as General Catalyst, 8VC, Glynn Capital, Bain & Company, and Visa Ventures, Hive boasts a global workforce of over 250 talented professionals across our offices in San Francisco, Seattle, and Delhi. If you're passionate about shaping the future of AI, we want to hear from you!About the RoleTo realize our ambitious vision, we aim to expand our elite engineering team. We seek innovative developers who thrive in launching new products and features, are comfortable with autonomy, and possess a fearless attitude towards experimenting with novel technologies. The ideal candidate will have a proven track record in building core services and web-based APIs from scratch, demonstrating a keen interest in both the product and the underlying technology. You should be proficient in creating well-structured, maintainable code that meets high standards of quality and performance.

About UsXOXO AI is an innovative research laboratory focused on creating intelligent interfaces for everyday life. Our team is composed of passionate engineers, designers, and researchers dedicated to solving unique challenges that affect our lives beyond the workplace.Having achieved significant advancements in our infrastructure, architecture, and model layers, we are now seeking talented builders to help us develop the interface and application layer that will bring our visionary concepts to fruition.About the RoleWe are in search of a skilled Backend Engineer to design, construct, and maintain high-quality production backend systems. This position is ideal for individuals who possess a strong command of cloud infrastructure, distributed systems, monitoring, and data persistence, with a keen emphasis on testing and stability.You will be responsible for overseeing backend projects from initial concept through to production launch, ensuring performance, reliability, infrastructure efficiency, and security are prioritized throughout the development process.What You’ll DoDevelop and manage backend services and distributed systems in a production environment using AWS or GCP.Design data storage and retrieval solutions utilizing a combination of vector, OLAP, SQL, NoSQL, caching, and search systems.Establish and maintain observability practices including monitoring, logging, tracing, and alerting to ensure system health and performance.Create and implement comprehensive testing frameworks that account for deployment and runtime failure scenarios.Take full ownership of backend projects, focusing on complex feature development, CI/CD, Terraform, stability, and security.

At Crusoe, our mission is to catalyze the proliferation of energy and intelligence. We are engineering the driving force behind a future where individuals can ambitiously create with AI without compromising on scale, speed, or sustainability.Join us at Crusoe as we lead the charge in the AI revolution through sustainable technology. You will play a pivotal role in fostering meaningful innovation, making a significant impact, and collaborating with a team that is pioneering the development of responsible and transformative cloud infrastructure.Position Overview:We are in search of experienced Staff/Senior Staff Software Engineers who will be tasked with the architecture, design, and development of advanced Cloud Infrastructure management systems and platforms. You will be vital in delivering end-to-end use cases and workflows for our integrated AI-First Crusoe Cloud. Your contributions will be essential in constructing systems and platforms that effectively plan, monitor, deploy, and operate Crusoe Cloud, achieving key business revenue metrics.Your expertise will be crucial in evaluating, implementing, and building platforms, tools, and frameworks that prioritize reliability, scalability, operational efficiency, and user-friendliness. You will enhance our infrastructure planning and management workflows, driving efficiency and improving the overall performance and reliability of our cloud platform as we ambitiously scale our Crusoe Cloud products and services by more than 10X.In this role, you will also develop and refine technical designs and architectures, mentor fellow engineers, and actively contribute to the growth of the team in partnership with engineering managers.Your Key Responsibilities:Engage collaboratively across teams to design, architect, and implement physical infrastructure management software systems and availability platforms that meet end-to-end customer use cases, ensuring an exceptional customer experience.Champion the reliability, scalability, and security of our systems and platforms, acting as the guardian of our infrastructure!Create workflows designed to enhance efficiency and achieve key business objectives and metrics.Design and implement high-performance, highly available cloud architectures, optimizing for both performance and cost-effectiveness.Enhance cloud deployment, configuration management, and operations by developing and maintaining effective platforms, interfaces, and automation tools.Actively participate in the evolution of our platform, working closely with cross-functional teams.

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.

Role overview Faire is seeking a Staff Backend Engineer to join the Discovery Experience team in San Francisco, CA. The focus of this position is on Search FX, where the goal is to improve search features so users can find what they need quickly and enjoy a seamless experience across the platform. What you will do Enhance and fine-tune backend search systems to provide relevant and rapid results. Collaborate with engineers, designers, and product managers to shape how users discover products. Apply technical expertise to build reliable and scalable solutions for search functionality. Collaboration This role involves frequent interaction with cross-functional teams. Sharing ideas, reviewing technical solutions, and helping guide the technical direction are all part of the work as the platform continues to grow.

Join our innovative team at fal as a Staff Software Engineer specializing in large-scale computation platforms. We are seeking a seasoned software engineer with extensive experience in developing backend systems that efficiently orchestrate workloads and manage resource constraints. Your expertise in foundational cloud infrastructure and Linux provisioning will be crucial as you work towards achieving high reliability and scalability with minimal operational overhead.

About UsAurora is on a mission to safely and efficiently revolutionize transportation through self-driving technology. Our innovations are set to create a new era in mobility and logistics, enhancing accessibility and safety for everyone.Join us as we solve complex challenges alongside passionate and talented individuals, expanding your expertise in the field. Stay updated with our latest developments by visiting aurora.tech or following us on LinkedIn.Aurora seeks enthusiastic individuals with diverse backgrounds who are eager to shape the future of transportation. We are currently looking for an outstanding Staff-level Backend Software Engineer to join our Aurora Services Engineering team, playing a pivotal role in developing our suite of fleet management tools.The Aurora Services Engineering team is dedicated to creating full-stack solutions, including backend services, web applications, mobile apps, and real-time onboard code, facilitating commercial operations of autonomous vehicle fleets at scale. Our goal is to build software that manages vehicle assignments, provides remote support, oversees fleet management, and processes customer orders. As we prepare for significant fleet expansion and API-level integration with partners, our tools will be vital to the efficient daily operations of our business.In your role as a Staff Backend Software Engineer, you will develop solutions for autonomous vehicle terminal operations, including launching and landing vehicles at Aurora and its major customers' locations. You will enhance existing products with new features and create entirely new solutions. Your contributions will be crucial in transforming how terminal operations function at Aurora.

About AnthropicAt Anthropic, our mission is to design AI systems that are reliable, interpretable, and steerable. We aim to ensure that AI technology is safe and advantageous for both our users and society as a whole. Our rapidly expanding team consists of dedicated researchers, engineers, policy experts, and business leaders collaborating to create beneficial AI systems.About the Role:We are in search of seasoned, product-oriented Software Engineers to take ownership of the backend systems that enhance user experiences across our API, Claude Code, and Claude.ai. In this role, you will independently define complex, multi-month projects within ambiguous problem domains and guide your peers in making technical and product-related decisions. You will align with product management, engineering teams, and research to identify capability gaps and translate cutting-edge model advancements into deployable products. Your architectural decisions will significantly impact the reliability and scalability of systems serving hundreds of thousands of global users, including internal teams, while you remain actively engaged with the code and our models.We are currently hiring for multiple teams. Team assignments will be made post-interview, considering your preferences and experience alongside organizational requirements. This flexible approach allows us to pair talented engineers with backend product initiatives where they can make the most significant impact and experience the most growth:API Core: You will develop and enhance the foundation of the Claude API—systems that deliver Claude's intelligence to developers ranging from startups to large enterprises. You will manage the performance, reliability, and efficiency of our core serving path, ensuring users derive maximum speed and value from our models. Collaboration with inference and safeguards will be key to optimizing the entire stack.API Capabilities: You will empower developers by integrating frontier model capabilities into the Claude API, overseeing core features such as vision, tool usage, and computer interaction. Your responsibilities will include launching new models and delivering the building blocks that enhance Claude's capabilities with each release, working directly with research and inference to productionize future advancements.API Knowledge: Your focus will be on transforming Claude into a true knowledge worker by ensuring the model has timely access to the right information. You will facilitate secure data access for developers, enabling Claude to automatically process and retrieve relevant data as needed.

Why Join Harvey?At Harvey, we are revolutionizing the landscape of legal and professional services. Our approach is not just incremental; we aim for comprehensive, end-to-end transformation. By leveraging cutting-edge AI technology, a robust enterprise-grade platform, and unparalleled industry expertise, we are changing how knowledge work is executed for generations to come.This is a unique opportunity to contribute to a generational company at a pivotal moment. With over 1,000 clients across more than 58 countries, proven product-market alignment, and support from top-tier investors, we are rapidly scaling and creating a new category in real time. Our ambitious work ethic, high standards, and unmatched opportunities for personal, professional, and financial growth make Harvey an exceptional place to advance your career.Our team is composed of highly skilled and motivated individuals who are fully dedicated to our mission. We prioritize speed, intensity, and genuine ownership over the challenges we face, from conceptualization to long-term results. We maintain close relationships with our customers at all levels, collaborating effectively to tackle real problems with urgency and care. If you excel in a dynamic environment, strive for excellence, and are eager to help shape the future of work alongside a team that elevates standards, we encourage you to join us in this journey.At Harvey, we are actively writing the future of professional services, and we are just beginning.Position OverviewAs a Senior Backend Platform Engineer at Harvey, you will play a vital role in building and maintaining the cohesive backend platform that underpins all our services. In this mid-to-senior level position, you will design and implement shared frameworks and libraries that abstract common concerns, enhance developer experience, and elevate the standards for reliability and performance across all teams. Your mission will align with our platform vision: to create “a foundational system that empowers product teams to deliver reliable, observable, and high-performing experiences swiftly and securely.” By centralizing common tasks, you will enable product engineers to focus on delivering features efficiently rather than reinventing existing solutions. This high-impact role means that your code and systems will significantly enhance the productivity and quality of our engineering efforts across the organization.If you are passionate about developing foundational systems, addressing cross-cutting technical challenges, and empowering others to innovate with confidence, we would love to hear from you.

Join Whop as a Staff Software Engineer, BackendAt Whop, we are pioneering the future of financial technology with a commitment to delivering sustainable income solutions worldwide. Our goal is to build the largest online marketplace where individuals and businesses can effortlessly create, connect, and transact on a single, innovative platform.With an astonishing $3 billion in annual payouts across 144 countries, we are on an impressive growth trajectory, experiencing a month-over-month transaction volume increase of approximately 25%.Backed by significant investments from industry leaders like Insight, Bain Capital Ventures, and Peter Thiel, including a major strategic partnership with Tether, the world’s leading stablecoin enterprise, Whop is well-positioned for future success.Our vibrant team comprises enthusiastic entrepreneurs who are deeply rooted in the digital landscape, with over 75% having launched their own businesses before joining us. This includes 53 former founders and 30 who have achieved over $1 million in revenue. Our product leaders bring valuable expertise from major tech companies like Meta and Robinhood.To learn more about our mission and vision, visit whop.com.

Join Hive, a pioneering force in cloud-based AI solutions, as a Senior Backend Software Engineer. In this role, you will play a crucial part in our mission to deliver cutting-edge AI capabilities that empower hundreds of prestigious organizations worldwide. We are seeking passionate developers who thrive on transforming innovative ideas into scalable products and features. If you possess a strong foundation in building robust core services and web-based APIs, along with a commitment to writing clean, maintainable code, we want to hear from you!

Join the Engineering Crew at Ivo!At Ivo, our engineers are the trailblazers of innovation. With groundbreaking advancements like:• An AI agent embedded within MS Word that edits documents on your behalf [2023]• Replacing outdated embedding models with agentic RAG technology [2023]• Large-scale extraction of legal facts using LLMs [2024]• A legal assistant capable of efficiently searching extensive contract databases without compromising accuracy [2024]• Intelligent clustering of related legal documents [2025]• Automated deviation analysis to uncover hidden risks in vast contract datasets [2025]• Merging contracts with amendments to create comprehensive “composite” contracts, bringing tears of joy to our users [2025]Role OverviewAs a Backend Engineer, you will be instrumental in enabling our software to tackle these challenges at scale.Your tasks will include:• Developing systems that reliably process and analyze millions of contracts• Designing robust pipelines for orchestrating LLMs, data extraction, and clustering algorithms• Creating the most precise search and retrieval systems available• Collaborating closely with legal professionals and product teams to leverage the evolving capabilities of LLMsOur MissionIn a world where legal teams are overworked and overwhelmed—often logging 80-hour weeks and facing impossible deadlines—technology has finally emerged to provide relief.At Ivo, our mission is clear: to empower lawyers by automating tedious legal tasks through our AI-native platform. Our users love our software, achieving an industry-leading trial win rate of 85%. We are committed to improving lives, and this is just the beginning.

About TybaTyba is an innovative modeling platform designed specifically for energy companies focused on developing, financing, and managing renewable energy infrastructure. Our platform empowers energy companies to leverage technical models that are crucial for making informed infrastructure decisions.Our mission is to democratize access to state-of-the-art models across diverse teams within organizations, enabling them to construct and operate renewable energy projects more profitably. Supported by leading climate-focused and generalist venture capitalists, we collaborate with some of the most forward-thinking companies in the energy sector.The RoleWe are seeking a skilled software engineer to join our Asset Operations Backend team and contribute to the clean energy transition. In this pivotal role, you will operate at the nexus of data science support and robust backend systems, bringing advanced optimization and forecasting models to life while developing the scalable infrastructure behind our expanding portfolio of battery storage assets.Our auto-bidding platform integrates price forecasts and bid optimization algorithms to provide exceptional market returns for our clients. You will spearhead essential initiatives that deliver high-impact features, collaborating closely with cross-functional teams and delving deep into the complexities of power markets and their interconnected systems. This role is vital within our startup environment, where your contributions will directly accelerate the energy transition.Your responsibilities will include supporting our data science and optimization teams (utilizing specialized Python libraries like cvxpy and neuralforecast) as well as building resilient backend services and system architectures. You will play a key role in guiding our evolution from the current architecture to a more modular microservices framework across Python, Clojure, and Kotlin.Tyba’s Product SuiteTyba offers two primary products—Operations and Project Simulation:Operations: An auto-bidding platform driven by a proprietary neural network that recommends and implements operational strategies based on leading-edge price forecasts and optimization techniques. Our platform consistently delivers revenue outcomes ranking in the top 5% of ERCOT assets.Project Simulation: A flexible simulation platform that allows developers to model realistic financial and physical outcomes based on geographical location, market dynamics, and battery specifications.

At Perplexity, we're revolutionizing the way individuals search, reason, and engage with information. Our API team is pivotal to this mission, crafting and managing high-performance interfaces that connect Perplexity’s intelligence with developers, enterprises, and products globally. This team is responsible for the architecture, reliability, and security of the APIs that fuel everything from real-time LLM queries to large-scale enterprise integrations.In the role of Staff Backend Engineer, you will play a crucial part in shaping the technical backbone of Perplexity’s external platform. You will design distributed systems, enhance performance at scale, and establish engineering standards to ensure our APIs are swift, dependable, and enjoyable for developers to work with.

Join Databricks as a Staff Backend Software Engineer on our cutting-edge AI Platform team. We are on a mission to simplify data and AI for enterprises worldwide. In this role, you will be pivotal in developing robust backend systems that support our AI initiatives, driving innovation and efficiency.As a member of our dynamic team, you will work with the latest technologies and methodologies to create scalable solutions that meet the needs of our clients. Your expertise will help shape the future of our AI Platform, delivering exceptional user experiences and insights.

Join Crusoe as a Staff Software Engineer focusing on innovative storage solutions. In this role, you will leverage your expertise to design, develop, and optimize systems that enhance our storage capabilities. You will work alongside a talented team, pushing the boundaries of technology in a collaborative environment.