As the first Founding Engineer at Proximitty, you will architect and ship frontier AI agents that automate complex commercial loan lifecycles. You’ll own the product end-to-end, from document ingestion to real-time credit decisioning. This role involves working directly with founders and banking clients to deploy autonomous infrastructure in high-stakes, regulated environments.
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Learn about Jack
Founding Engineer at Proximitty
Join Proximitty, a high-growth YC W26 startup revolutionizing the $3 trillion commercial credit market. As our first Founding Engineer in San Francisco, you’ll work alongside founders from McKinsey and Bloomberg to build autonomous AI agents for major US banks. Backed by CRV and angels from Stripe and OpenAI, we are on track for seven-figure ARR this year. You’ll own the product end-to-end—architecting self-evolving systems, deploying live at financial institutions, and tackling frontier AI problems in a high-trust, low-overhead environment. If you want to build the most powerful tool banks have ever seen while earning $170k-$200k and significant equity, apply now.
About this role
Role overview
About the company
Finance
Proximitty is a financial crime and anti–money laundering (AML) technology company focused on automating financial crime reviews using trusted AI agents. Its platform is built specifically for the complexity of cross‑border financial activity and is designed to meet stringent regulatory standards, helping financial institutions and compliance teams streamline and automate AML and financial crime investigation workflows.
What you'll do
What you will do
- Build and own the core infrastructure for autonomous lending agents using TypeScript, Next.js, and Mastra.
- Deploy code live on client systems by flying to major banks and iterating based on direct feedback from credit officers.
- Create self-evolving agents and evaluation frameworks that ensure reliable performance in high-stakes, regulated financial environments.
Who you are
Who this is a fit for
- Strong background in full-stack and distributed systems engineering, specifically using TypeScript and AWS for production applications.
- Deep curiosity for frontier AI agentic architectures and the ability to build reliable "computer-use" agents for brittle legacy systems.
- A founding-engineer mindset that thrives on ownership, customer empathy, and shipping fast without over-engineering or premature optimization.
Why this role
Why this role is remarkable
- Work on frontier agentic architecture involving long-horizon reasoning and self-healing systems that solve real-world problems in a $3 trillion market.
- Join a high-traction team backed by top-tier investors like Y Combinator and CRV, with a direct path to seven-figure ARR.
- Enjoy a high-trust, low-overhead culture with no standups, fully expensed meals, and a culture that prioritizes physical health and wellbeing.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
How does this work?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If it’s a match and the company wants to meet you, they’ll make the intro. In the meantime, if you’d like, Jack will send you excellent alternatives.