Senior Full Stack Engineer

Job description

Senior Full Stack Engineer (Node.js / React)

Location: London (Hybrid)

Salary: up to £100,000

We’re working with a well-funded, early-stage startup building a next-generation, AI-powered platform in the fintech/regtech space. They’re looking for a Senior Full Stack Engineer to play a key role in scaling a modern microservices architecture and shaping the future of the product.

What you’ll be doing:

• Designing and building scalable microservices using Node.js (Nest.js) and React

• Driving an API-first architecture with strong focus on service-to-service communication and contract testing

• Owning features end-to-end, from idea to production with a strong feedback loop from real users

• Improving system performance, reliability, and observability across a distributed environment

• Contributing to a modern DevOps culture with CI/CD, automated testing, and infrastructure as code

Tech stack:

React, Node.js (Nest.js), Python/FastAPI, AWS (ECS), PostgreSQL, Kafka, Terraform, GitHub CI/CD

Testing: Jest, Cypress, Pact, Pytest

What they’re looking for:

• Strong experience building distributed systems / microservices architectures

• Deep hands-on expertise with Node.js and React

• Solid understanding of API design, event-driven systems, and contract testing

• Experience working in fast-paced, ambiguous environments

• Passion for automation, clean code, and solving real customer problems

Why join?

• End-to-end ownership of impactful features and systems

• Work on a cutting-edge platform leveraging AI/ML

• High-trust environment with strong engineering culture

• Flexible working (hybrid London or remote)

• Direct exposure to founders and influence over technical direction

If you’re excited by building scalable systems, working with modern tooling, and being part of a high-growth engineering team - let’s chat.

Message me directly or apply to learn more!

Extra information

Status

Open

Education Level

Secondary School

Location

City of London

Type of Contract

Full-time jobs

Published at

26-03-2026

Profession type

ICT

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English