Senior Full Stack Engineer

Senior Full Stack Engineer (Confidential Startup)About the OpportunityWe are partnering with a well-funded, early-stage technology company that is transforming how scientific organizations manage, structure, and leverage research data. Backed by leading investors and already supporting high-profile research institutions, the company is experiencing significant customer demand and is expanding its engineering team.This is an opportunity to join a small, highly technical team where you will have meaningful ownership, direct influence on product direction, and the ability to build foundational systems from the ground up.The RoleWe are seeking a Senior Full Stack Engineer who enjoys solving complex infrastructure challenges and building scalable systems that power data-intensive applications.This role combines backend architecture, data infrastructure, and full-stack product development. You'll work closely with technical founders, end users, and cross-functional stakeholders to design and build systems that transform fragmented data into actionable insights.What You'll Be DoingDesign and build scalable data ingestion, normalization, storage, and indexing systems.Develop backend services primarily using Python.Contribute across the stack, including modern web applications and user-facing tools.Design database schemas that support complex and highly varied datasets.Own architectural decisions and drive system reliability, scalability, and performance.Partner directly with end users to translate domain-specific challenges into practical software solutions.Balance speed, quality, and long-term maintainability in a fast-moving startup environment.What We're Looking ForRequired Experience4–8+ years of software engineering experience.Strong background in full-stack development with significant backend ownership.Proven experience building production data infrastructure, including pipelines, storage systems, or indexing services.Advanced SQL and database design expertise.Strong Python development experience.Experience owning architecture and designing scalable distributed systems.Ability to operate independently in a startup environment with high levels of ownership.Preferred ExperienceExperience with data platforms, analytics systems, or infrastructure-heavy applications.Familiarity with NoSQL databases, real-time processing systems, or event-driven architectures.Prior startup experience.STEM, Computer Science, Engineering, or related technical background.Exposure to scientific research environments, laboratory systems, research data, or technical users.Ideal CandidateThe strongest candidates will demonstrate:Deep backend and systems-thinking capabilities.Strong communication skills and the ability to explain technical decisions clearly.A builder mentality with a bias toward ownership and execution.Curiosity, humility, and a collaborative approach.Interest in solving complex technical problems with real-world impact.Comfort working directly with customers and domain experts.What Success Looks LikeQuickly becoming a trusted owner of critical platform infrastructure.Delivering scalable systems that support growing customer demand.Making thoughtful architectural decisions that balance immediate needs with long-term growth.Collaborating effectively across technical and non-technical stakeholders.Helping shape engineering culture during a pivotal growth stage.Compensation & LocationBase Salary: $180,000 – $220,000Meaningful equity participationOnsite position in the San Francisco Peninsula areaVisa sponsorship may be considered for exceptional candidatesSmall, highly collaborative engineering team with direct access to company leadership.Why Join?This is a rare opportunity to join an early-stage company that has already achieved meaningful customer traction while still offering the impact, ownership, and upside of a startup. You'll help build foundational technology used by leading technical organizations while working alongside experienced founders and a small, ambitious team.