# Senior Backend Software Engineer > Raydar · San Francisco, United States · Full-time · Posted 2026-10-12 **Salary:** USD 225,000–275,000 **Workplace:** on_site ## Description About the company Our client is a fast-growing software company. The role Raydar is recruiting for this role on behalf of our client. Act as a senior technical lead for backend engineering on a small team, shaping architecture and engineering standards. The work pairs server-side engineering with applied generative AI, in close partnership with researchers, engineers and designers. What you'll do \- Design and build backend services that form the core of a software platform. \- Create infrastructure for AI-driven workflows, media generation pipelines and live data handling. \- Take ownership of system architecture across many services, and strengthen reliability with automated tests, performance measurement and monitoring. \- Collaborate with researchers, engineers and designers to deliver new features and APIs. \- Define coding guidelines and mentor others by example to lift overall engineering quality. \- Document your work clearly and explain technical choices to colleagues working side by side in an office. ## Requirements What we're looking for \- 5 to 10 years of backend engineering experience, with solid fundamentals in algorithms, data structures and system design. \- A track record of building backend systems that scale, including work with large data volumes, search and retrieval, and background job processing. \- Hands-on professional use of TypeScript and AWS. \- At least 12 months of professional experience building applications on large language models or generative AI, including autonomous agent-style systems. \- Time spent in a startup setting, either early-stage or rapidly growing. \- A formal university degree. \- Fluent English in reading, writing and speaking. \- Ability to work in the office five days a week in San Francisco, as a local resident or able to start immediately. Bonus points \- Previous experience as a technical lead, setting direction and code standards for a team. ## Benefits Compensation and benefits \- Base salary: USD 225,000 to 275,000 per year \- Equity \- Health, dental and vision coverage Location and work model \- San Francisco, CA, United States \- On-site, 5 days per week \- Full-time ## Apply [Apply at Raydar](https://apply.workable.com/raydar/j/277A127C1C/apply) --- Powered by [Workable](https://www.workable.com)