Staff/Senior Software Engineer

The role

You will build AI products that assist scientists and accelerate technical progress towards next-generation solar solutions. You will lead development of the planning and reasoning layer using a multi-agent system. You will also maintain data systems, review code, and mentor new engineers.

What you will do

• Build AI products that assist scientists
• Lead development of the planning and reasoning layer using a multi-agent system
• Measure performance of frontier models and agents
• Hold AI-written code to a high bar
• Keep existing data systems running
• Review code across the team
• Help hire and mentor new engineers
• Write about learnings for public whitepapers and publish in papers and conferences

Required qualifications

• 5+ years of professional software engineering experience, including systems that real users depend on
• Built full-stack web applications, with a Python backend and a TypeScript/JavaScript frontend (React, Vue, Svelte, or similar)
• Built applications on frontier LLMs through their APIs, such as agents, multi-step orchestration (e.g., LangGraph), or systems where models call tools
• Can take an idea from a quick prototype to a production system that people depend on
• Use AI coding tools like Claude Code every day
• CS degree or a comparable record of open-source or portfolio work
• Write documented, tested code and are comfortable working in a shared codebase with git
• Can explain technical tradeoffs to scientists who are not software engineers
• Take initiative and work independently
• Are coachable and comfortable when priorities change quickly
• Are kind, empathetic, conscientious, and motivated to make an impact on climate change

Nice to have

• Experience with multi-agent systems, especially ranking, review, or memory between runs
• Experience building evaluations or benchmarks for LLM agents
• Experience designing complex software architecture and leading projects end-to-end without much oversight
• Familiarity with Bayesian optimization, surrogate models, fine-tuning of open-weights models, or reinforcement-learning environments
• Experience analyzing and plotting scientific data
• An interest in science, shown through conferences, side projects, or papers
• Experience getting skeptical users to adopt internal tools
• Experience with SQL or database administration, AWS, Azure, or GCP, or CI/CD
• Experience working at a startup

Benefits

• 100% of monthly premiums for HMO / PPO group healthcare plan options covered
• 75% of dental and vision insurance premiums covered
• 401(k) matching
• Clean commuter benefits
• Meaningful equity
• Support for attending conferences and taking online courses

About the company

Swift Solar's mission is to unlock the full potential of solar energy using perovskite-silicon tandem technology. The company is vertically integrated to design, manufacture, and scale solar solutions in the United States.