Senior Full Stack Engineer
TLDR
Be one of the first engineers, shipping rapidly, building new workflows, tackling LLM-powered projects, collaborating with partners, and shaping our engineering culture.
About Junior
We're building cutting-edge LLM-powered tools that supercharge investment research for the world's most demanding deal teams. Our clients include several of the top 10 global private equity firms, Big 4 professional services firms, and leading consulting practices: organisations responsible for deploying billions of dollars annually.
We're a profitable, bootstrapped company with a growing team of ~28 people based in London and New York. We 10x'd our revenue in 2025 and are on track to grow 2-3x again this year. Junior saves clients an average of 10 hours per week, and we're expanding fast into new verticals including investment banking, hedge funds, and research firms.
Role Description
As one of our first engineering hires, you'll have the unique opportunity to:
Ship quickly
Design and build new modes of working with computers
Work on groundbreaking projects involving LLMs
Collaborate closely with our external partners to fuel our growth
Contribute to product decisions, direction and prioritization
Shape our engineering culture
Sample set of projects
Build new frontier products at Junior to ingest more types of research inputs
Build a voice-to-voice survey tool with extremely low latency that can autonomously conduct high volume of research tasks
Build a mobile app from scratch in 3 weeks
Create segmented knowledge graphs built on top of the output of unstructured ⇒ structured data transformations
Build an AI native CRM system with deep links to the knowledge graph above
About You
We're looking for product-minded full-stack engineers who:
Based in NYC
Are eager to contribute to product decisions
Have strong communication skills and a desire for a client-facing role
Are proficient in our tech stack: Next.js, TypeScript, PostgreSQL
Bonus points for experience building & designing AI-powered products!
Feel like you are never building fast enough
Benefits
All the usual benefits (competitive pay and equity, private healthcare etc). Unusual benefits:
Gym membership
In-office cook
Summers working in Greece by the beach
If you're excited about the opportunity to drive innovation at Junior, we'd love to hear from you!We can't wait to meet you! 🙌
Benefits
Equity Compensation
Equity
Free Meals & Snacks
In-office cook
Health Insurance
Private healthcare
Remote-Friendly
Summers working in Greece by the beach
Wellness Stipend
Gym membership
Junior AI builds advanced LLM-powered workflow tools that enhance investment research specifically for private market investors. Catering to top global private equity firms and consulting companies, we empower our clients to efficiently manage billions in investments, saving them significant time and streamlining their deal processes.