# Senior Software Engineer > Raydar · San Francisco, United States · Full-time · Posted 2026-11-03 **Salary:** USD 200,000–300,000 **Workplace:** on_site ## Description About the company Our client is a fast-growing technology company. The role Raydar is recruiting for this role on behalf of our client. A hands-on senior engineer who builds and ships AI-driven software systems, sets technical direction alongside engineering leadership, and guides a team of junior engineers. The work spans core platform development, packaging software for customer-hosted deployments, and turning customer feedback into product improvements. What you'll do \- Build and improve core services and runtime components in Python. \- Turn loosely defined problems into working AI-driven systems, then refine them using evaluation data, traces and telemetry. \- Package and deploy software in containers for customer-hosted environments. \- Lead a quick-moving group of junior engineers by identifying where work stalls, ranking tasks and making design choices alongside engineering leadership. \- Work with field-facing engineers to turn customer learnings into product changes. ## Requirements What we're looking for \- Six or more years of software engineering experience, or four or more for ground-floor founding engineers and founders. \- Track record of putting a modern AI agent or LLM-based product into production from start to finish. \- Experience leading an engineering team or a major project, ideally at a startup. \- Strong backend and infrastructure depth across Linux, Unix, containers, networking and storage. \- Strong Python skills. \- Solid grounding in distributed architecture, performance tuning and handling data at scale. \- Has designed large system structures for server-side or infrastructure work, ideally while on an early company's leadership team. \- Engineering degree in computer science, electrical engineering or electrical and computer engineering from a highly ranked engineering school. Bonus points \- Hands-on experience with post-training methods for language models, such as reinforcement learning from human feedback, preference optimization or reinforcement learning for agents. \- Experience with TypeScript, Rust, C++ or Go. ## Benefits Compensation and benefits \- Base salary: USD 200,000 to 300,000 per year \- Equity \- Health, dental and vision coverage \- Retirement plan Location and work model \- San Francisco, CA, United States \- On-site, 5 days in-office \- Full-time ## Apply [Apply at Raydar](https://apply.workable.com/raydar/j/10AB4CE1CA/apply) --- Powered by [Workable](https://www.workable.com)