Senior Full Stack Engineer at Junior AI | GB | Rezi

Senior Full Stack Engineer at Junior AI

Senior Full Stack Engineer

Junior AI · GB

1 weeks ago

Senior Full Stack Engineer

Junior AI · GB

10 days ago
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About the Role

Junior is building the AI operating system for investment research, helping financial institutions complete high-stakes research workflows faster. You will own features end-to-end, shipping on a weekly cadence and working on groundbreaking projects involving LLMs. You will also speak directly with clients to shape product decisions and help define the engineering culture.

Responsibilities

  • Own features end to end across frontend, backend, and data layer.
  • Ship features on a weekly cadence.
  • Design and build new ways of working with computers.
  • Work on groundbreaking projects involving LLMs.
  • Speak directly with clients using the built features.
  • Use client conversations to shape product decisions.
  • Help define Junior's engineering culture.

Requirements

  • 5+ years of engineering experience.
  • Demonstrated competence over pedigree.
  • Genuinely strong in TypeScript, Next.js, and PostgreSQL.
  • Ability to build a polished React/Next.js interface or work through a difficult TypeScript problem live and quickly without relying on Copilot.
  • Solid foundations in data structures, system design, and PostgreSQL.
  • High-agency and product-minded.
  • Experience owning projects end-to-end and shipping without a detailed specification.
  • Clear communication skills.
  • Desire for a client-facing role.
  • Based in London or committed to relocating.
  • Excited to work with the team in person in Farringdon.
  • Feeling of never building fast enough.

Skills

  • TypeScript
  • Next.js
  • PostgreSQL
  • React
  • Data Structures
  • System Design
  • AI-powered products

Location

  • London

Work Type

  • On-site
  • Full-time

Experience Level

  • 5+ years

Benefits

  • Private health insurance
  • Third Space gym membership
  • Dinner provided when working late
  • Team lunch provided every day at the office
  • Frequent international off-sites

About the Company

  • Building the AI operating system for investment research.
  • Software helps private equity firms, consultants, and financial institutions complete high-stakes research workflows dramatically faster.
  • Trusted by several of the world’s top private equity firms, Big Four consultancies, and leading financial institutions.
  • Bootstrapped and profitable.
  • Approximately £20M+ in revenue, after growing 10x last year.
  • 60+ people across the company.
  • 20-person engineering team, doubling to 40 this year.
  • Core stack: TypeScript, Next.js, and PostgreSQL.
  • Opportunity to shape the product, engineering culture, and company.
  • Sufficient traction for built features to land immediately in front of demanding, paying customers.