Senior Software Engineer (Backend)

Who Are We Third Chair(YC X25) is building AI Agents for in-house legal teams. The team comprises of 2 second-time founders with past exits. Yoav previously cofounded social media analytics startup Trendpop(YC W21) that scaled to 1M in ARR in 16 months building a platform that processed millions of social posts per day. Shourya previously cofounded a consumer finance startup Fello(YC W22) that scaled to over 2 million users and managed over 600k monthly active users and over $250,000 in monthly investments. Third Chair is building vertical AI-native workflows for legal teams that help them complete end-to-end workflows that previously required 100s of hours. This is accomplished by building SOTA AI agents that browse the web, download and collect evidence, draft letters and more. We've grown 88% last month and went from 0 to 100k ARR in 5 months . More here. What Makes You a Good Fit 3+ years of hands-on experience developing production level Node.js/Typescript backends. Strong experience with structured DBMSs like PostgreSQL and OLAP databases like Redshift. Strong understanding of AWS services such as ECS, RDS, S3, CloudWatch, Elasticache. Experience working with telemetry, CI/CD and IaaC pipelines. Comfortable with US timezones. What Makes You a Great Fit Past experience with OpenAI APIs for completions, function calling and building context aware assistants. Past experience with Go routines. Building multi-agent systems using frameworks like CrewAI or such. Strong sense of cost optimization strategies, system design, and building efficient API stacks. Benefits Work from anywhere - We're a distributed team across multiple timezones with a focus on outputs instead of location or working hours. Generous PTO policy. Competitive pay bracket. Equity at a fast growing YC backed co in a disruptive market. Show more Show less