Senior Full Stack Engineer

👶 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! 🙌