Senior Full-Stack Software Engineer
Raydar
Senior Full-Stack Software Engineer
Raydar
AI-powered recruiting agency for tech roles
Raydar · San Francisco, United States · Full-time · Posted 2026-10-05
Salary: USD 180,000–280,000
Workplace: on_site
About the company
Our client is a fast-growing software company.
The role
Raydar is recruiting for this role on behalf of our client. Join as an early engineering hire building a production software platform from scratch, spanning backend services and web interfaces. You will shape technical direction alongside company leadership and own features from initial design through release. The work also includes integrating large language model capabilities into production systems and talking with users directly.
What you'll do
- Design, build and operate backend services and web frontends for a new production platform.
- Shape the technical direction and conventions of a young codebase.
- Build and ship systems that integrate LLM APIs, including orchestration and tool calling.
- Own features end to end, from design through deployment and monitoring.
- Work directly with founders and speak with customers to refine features based on their feedback.
- Weigh refactoring against delivery speed, and manage technical debt deliberately.
- Use AI-assisted development tools to work faster.
What we're looking for
- 5+ years building production software, with experience across the stack and sustained ownership of meaningful systems.
- Production experience in a typed backend language such as Go, Java, Scala, C++ or C.
- Proficiency in Python, including async patterns and integration with AI/ML tooling.
- Solid PostgreSQL skills: schema design, migrations and production operations.
- Ability to build and maintain a modern React and TypeScript frontend.
- Hands-on experience designing and shipping production systems built on LLM APIs, beyond prototyping.
- Clear written and verbal communication with users and customers, and a record of refining features from their feedback.
- Experience leading larger projects, judged by scope, complexity and business importance.
- A pragmatic mindset, with good judgment on when to build versus buy.
- Comfort with ambiguity and shifting priorities in an early-stage environment.
- An understanding of what it means to be a founding engineer.
- A bachelor's degree or higher in a technical discipline such as computer science or engineering.
Bonus points
- Early-stage startup experience, or a mix of large tech company and startup experience.
- Experience with infrastructure as code and cloud deployment.
- Familiarity with vector search, embeddings and retrieval patterns.
- Experience with real-time systems such as streaming APIs or WebSockets.
- Strong testing discipline, including building test frameworks and coverage standards.
- Production operations experience: observability, incident response and reliability.
Compensation and benefits
- Base salary: USD 180,000 to 280,000 per year
- Equity
- Benefits package
Location and work model
- San Francisco, CA, United States
- On-site, 5 days per week in office
- Full-time
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Raydar is an AI-powered talent acquisition firm that serves tech-focused organizations on a contingency basis, charging client companies only after a successful hire. It uses proprietary AI to identify a large pool of candidates and conducts a short 15-minute AI-driven interview (recorded and transcribed) before human recruiters review materials, provide interview prep, and assist with offers and negotiations. What sets it apart is the blend of automated sourcing and screening with hands-on human oversight and tailored client support. Its goal is to help organizations hire more efficiently by speeding up sourcing while maintaining thorough evaluation and negotiation assistance.
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