Senior Full-Stack Engineer

Location: Remote Type: Full-time About 100 100 is a PropTech platform disrupting multifamily's rental process. 100 sets a new standard through cutting-edge verification and fraud prevention tools that eliminate bias, fraud, and friction. Built and backed by industry experts who know the challenges firsthand. About this role We're a seed-stage startup, which means what you bring matters more than at a bigger company. We move fast, ship often, and expect everyone to own outcomes, not just tickets. We are looking for a senior full-stack engineer who is product-minded — you care about what we're building and why, not just how it's built, and you can tell the difference between a problem worth solving well and one worth solving fast. You ship, learn, and iterate rather than waiting for the "right" solution. You genuinely like solving problems — you notice things, a flaky test, a confusing error message, a slow query, and you fix them without waiting to be asked. You don't need a ticket to tell you something's broken. And you do it without ego: you ask questions instead of assuming, take feedback easily, give credit freely, and are just as happy fixing a small papercut as leading a big design decision. You'll also need to be genuinely fluent with AI-assisted development — using tools like Claude Code or Cursor to move faster without sacrificing code quality, and knowing where AI helps and where it doesn't. When you find something that works — a better prompt pattern, a new tool, a smarter workflow — you share it, so the whole team levels up together. We are pragmatic about technology. We adopt new tools when they earn it and keep what works. You will have meaningful input into where the stack goes next. What you will do Ship full-stack features across our TypeScript and Python servicesOwn significant parts of the product end-to-end — frontend, API, database — and jump in wherever the problem is, whether or not it's "yours"Design the technical approach for individual features — data model, API shape, how it fits into the system it touchesUse AI tools as a core part of how you build — for code, debugging, docs, and speedImprove the platform: performance, reliability, developer experienceHelp shape architecture decisions at the stack level — the tools, patterns, and infrastructure choices that affect the whole team, not just one featureMake the call and act — ship an 80% solution today over a perfect one next week, and iterate from thereCollaborate closely with a small, senior team on a product where engineering quality directly affects whether properties trust us with their applicants What you'll bring 7+ years of professional software engineering experienceStrong TypeScript, Node.js, and React experience, with comfort working across the stack using tools like Hono, Next.js, and React RouterPython — we have production services in FastAPI and Django alongside our TypeScript stack, so you should be comfortable building and maintaining Python backends, not just scriptingSolid SQL, ideally Postgres, and experience with SupabaseReal, hands-on fluency with AI coding tools — not just curiosity, but daily use in productionA track record of being the person who solves the problem in front of them, regardless of whether it's technically in scopeComfort with ambiguity and a fast-moving, small-team pace — priorities shift, and you adjust without needing a lot of hand-holdingBias to action — you'd rather ship, learn, and adjust than deliberate for too longLow ego — you ask for help early instead of spinning, take feedback well, and give credit generouslyYou share what you know — in code reviews, docs, or just answering questions — because a stronger team makes better products Bonus points A deep, first-principles understanding of web performance — caching, rendering, network waterfalls, why a page actually feels fast or slowSecurity-minded — you think about auth, data handling, and attack surface as part of the job, not an afterthoughtYou've dabbled in DevOps — Terraform, Kubernetes, Ansible, comfortable on LinuxExperience building agentic systems — multi-step, tool-using AI workflows, not just calling a model for a single response