Hiring: Software Engineer, Full Stack - Founding Team Company: Spark AI Location: San Francisco, CA Job Posted Time: 2026-09-16 17:59:01 Employment Type: Full-time Target Skills & Keywords: TypeScript, React, NextJS, NodeJS, NestJS, Postgres, AI Agents, RAG, LLMs, Data Pipelines, Full-Stack Development, Data-Intensive Systems Experience: - 3+ years of professional software engineering experience - Experience building full-stack software applications, including web frontend and backend APIs with a data model layer - Bonus: Experience designing and building large, data-intensive systems - Bonus: Experience using LLMs programmatically, building AI agents, and/or using RAG - Bonus: Have worked at a startup or in energy Required Skills: - Full-stack development across frontend (TypeScript, React, NextJS) and backend (NestJS, Postgres) - Ability to rapidly prototype, test, and ship features - Designing and shipping AI-driven features such as agentic web browsing, retrieval-augmented generation (RAG), and large-scale data extraction - Extending core APIs, AI infrastructure, and data pipelines - Owning features end-to-end: idea → design → implementation → production → user feedback - Willingness to learn new domains, including AI tools, techniques, and APIs, plus solar and storage project development Qualifications: - 3+ years of professional software engineering experience - Experience building full-stack software applications - Exact technology match is great but not required; excitement to learn and contribute across the board is essential - Willingness to learn new domains - You love writing code but also care about having a big impact - Excited to talk to customers, not just hide in code - Excited about shaping what to build - Know when to hack and when to refactor Compensation: - Base pay range: $150,000.00/yr - $200,000.00/yr - Actual pay will be based on skills and experience Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don’t miss this opportunity to join a forward-thinking team!