Senior Full-Stack Engineer
Qualifications and requirements
Senior, and genuinely full stack. You’ve shipped and operated production systems end to end. You don’t need to be an expert in every layer on day one, but you should be someone who has repeatedly gone and learned the layer the problem was in.
Comfortable with loose requirements. You’ll often get a problem and a constraint, not a spec. You convert that into a plan, ask the two questions that actually matter, and start building.
A finisher. You can drive a project from a vague idea to shipped and stable — including the unglamorous last 20%.
AI-pilled, concretely. You’re already building with agents, not just autocompleting with them. You have opinions about what to hand to a model, how to verify its output, and where the leverage actually is. We’ll ask what you’ve automated.
Strong judgment about risk. We handle sensitive financial data for people who can’t afford for us to get it wrong. You know which corners are safe to cut and which aren’t.
Job functions
Ship features end to end across the stack: Django REST API, Next.js consumer and admin apps, React Native mobile app, and the AWS infrastructure under all of it
Build and maintain the agents that do our operational engineering work — incident triage, automated fix PRs, test authoring and execution, security and compliance audits, dependency upgrades
Develop LLM-powered product surfaces (negotiation agents, conversational onboarding) along with the eval and observability tooling that keeps them honest
Own Terraform-managed AWS infrastructure and the GitHub Actions pipelines that deploy to it
Scope work directly with the CEO from loose requirements, then drive it to shipped, adopted, and stable
Operate what you ship — watch it in production via Sentry, Logfire, and PostHog, and fix what you find
Desirable skills
- Experience shipping and maintaining a React Native app in both app stores
- Background building LLM evals or agent observability
Conditions
You will have the opportunity to work directly with the CEO, who's last fintech startup is now valued at $500M. This is a contract position, with the possibility of conversion to full-time with full benefits.