Full Stack Engineer

W Talent; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading fintech startup in London is seeking a Senior Full-Stack Engineer to help build and scale a platform that improves access to loans. This hands-on role requires expertise in Python, React, and SQL, with a focus on building production-grade systems. You'll work in a close-knit team, making meaningful technical decisions and influencing the technical foundations of the platform. The role offers a competitive package and the chance to work hybrid, with 3 days a week onsite at London Bridge.

Benefits

Competitive package

EMI

Full medical cover

Qualifications

• Experience with production-grade systems in a senior engineering role.
• Strong full-stack capability across Python and React.
• Solid SQL skills needed.

Responsibilities

• Build features end-to-end using Python, React, and TypeScript.
• Write clean, well-tested, production-grade code.
• Improve architecture, performance, and scalability.

Skills

Building production-grade systems

Full-stack development with Python

Full-stack development with React

SQL skills

Testing mindset

Ownership

Tools

Docker

Kubernetes

AWS

GCP

Job description

Senior Full-Stack Engineer (Fintech / AI)

Location: London Bridge (Hybrid - 3 days onsite)

W Talent is supporting a high-growth fintech startup building a platform that simplifies access to lending.

By combining human expertise with modern AI, the team enables advisers to match customers to the right loans in seconds. The product is live in advanced beta and preparing for commercial scale.

This is an opportunity to join early, work hands-on, and help shape a platform that genuinely improves people's financial lives.

The role

You’ll be a senior, hands‑on engineer working across the full stack in a small, experienced team.

Responsibilities include:

• Building features end-to-end using Python, React, and TypeScript
• Writing clean, well‑tested, production‑grade code
• Improving architecture, performance, and scalability
• Strengthening testing, CI, and CD pipelines
• Collaborating closely with Product to solve real user problems
• Working with modern AI models and a contemporary AI engineering stack
• This role offers real ownership, fast decision‑making, and minimal bureaucracy.

What we're looking for

• Proven experience building and running production‑grade systems in a senior engineering role
• Strong full‑stack capability across Python and React
• Solid SQL skills
• A strong testing mindset and commitment to engineering quality
• Someone who leads by example and takes ownership
• Pragmatic, curious, and delivery‑focused
• Comfortable working in a small, fast‑moving team environment

Nice to have

• Redis, Celery
• AWS or GCP
• Docker or Kubernetes
• SOC 2 familiarity
• Interest in Rust or Go

Why consider this opportunity?

• Influence the technical foundations of a fintech platform about to scale
• Make meaningful technical decisions from day one
• Work alongside senior engineers who value clarity, quality, and speed
• Competitive package, EMI, and full medical cover
• A business that uses AI properly in production - not just in slide decks

Location & eligibility

• UK right to work required (no visa sponsorship available)
• Hybrid working: 3 days per week in the London Bridge office
• Candidates must be able to commute reliably