Offstream (YC S24) | Senior Software Engineer | San Francisco, CA or Denver, CO (Hybrid, 3 days/week) | $120k-$190k + equity | Full-timeOffstream is building the infrastructure for the environmental compliance market, think compliance software meeting real-world industrial hardware. We're expanding from pure web application work into physical hardware and real-world infrastructure, and we need a senior engineer to help drive that. You'd be our 5th software engineer, with the opportunity to make a real impact across our entire stack, from data ingestion systems that turn messy real-world inputs (unstructured PDFs, IoT sensor data) into structured compliance data, to the product surfaces our customers use every day. Stack: TypeScript, Next.js, GraphQL, PostgreSQL What we're looking for: - 4+ years of software engineering experience, ideally at early-stage startups - Comfort working with technologies behind real-world industrial/IoT systems - Track record building 0-to-1 products or systems - Genuine enthusiasm for AI-assisted development (we're an AI-native team) If you don't check every box but think you can grow into this fast, we still want to hear from you. We're optimizing for high-slope individuals. Apply here based on your location: - SF: https://www.ycombinator.com/companies/offstream/jobs/Zz3OPtN... - Denver: https://www.ycombinator.com/companies/offstream/jobs/3EvEolP... I'm Zach, Offstream's CTO and co-founder. I personally read every single application that comes through, so don't hesitate to apply even if you're not 100% sure you're a fit