Senior Full Stack Engineer

Senior Full Stack Engineer | AI-Recruitment SaaS (React & Python)

Location: Peterborough / Hybrid

Salary: £55,000 – £65,000 + Bonus

Tech: React (TS), Python (FastAPI), Google Vertex AI, Postgres, GCP

Build the Future of AI-Driven Recruitment

Are you a Senior Engineer who thrives on "greenfield" projects? Do you want to work on a platform where AI isn't just a buzzword, but the core engine of the product?

Join Crooton to help us build our AI-powered recruitment intelligence platform. We are solving the biggest headache in high-volume hiring: processing thousands of applications with speed, fairness, and intelligence, as well as saving time and money.

This isn't a legacy rescue mission. You’ll be joining a small, senior team to write modern, well-structured code and shape the technical roadmap of a platform that’s already making an impact.

• Frontend:
  React, Type Script, Vite, Tailwind CSS, Zustand.
• Backend:
  Python 3.10+ (FastAPI), Postgres, Redis.
• AI/Infrastructure:
  Google Vertex AI, GCP (Cloud Run), Docker, CI/CD.

• End-to-End Ownership:
  Building and shipping full-stack features, from AI analysis visualisations (Chart.js) to advanced workflows.
• High-Performance UI:
  Designing complex React components and ensuring our "Command Centre" remains lightning-fast under heavy data loads (AG Grid).
• AI Integration:
  Refining LLM prompting logic and CV parsing to improve candidate scoring and bias reduction.
• Scaling Architecture:
  Extending our FastAPI services with a focus on strong typing, validation, and async performance.

We are looking for a "Product Engineer"—someone who cares as much about the user experience as they do about the underlying architecture.

• Frontend Expert:
  You have deep experience with modern React (Hooks, Composition) and building data-heavy interfaces.
• Python Pro:
  You are comfortable building and maintaining async APIs (FastAPI/Pydantic).
• Testing Advocate:
  You believe in the "Testing Pyramid" (Pytest, Vitest, Cypress).
• Problem Solver:
  You enjoy solving ambiguous, real-world problems and want meaningful ownership rather than just "clearing tickets."

• No Legacy Drag:
  Work on a modern stack with no inherited technical debt.
• AI-First Culture:
  We use AI to accelerate our own development and iteration.
• Senior
  
  Collaboration:
  
  Work closely with our Leadership Team in an environment that values clean architecture and good engineering judgment.
• Real Impact:
  As part of a small team, you will see your work used immediately by organisations hiring at scale.
• The Package: £55k–£65k DOE + performance-related bonus and a hybrid working model in Peterborough.

Ready to apply?

If you’re a clear communicator who cares about code quality and security, we want to hear from you.

Apply today with your CV and (optional) Git Hub profile.