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Senior Full Stack Engineer in London

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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-, 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!
If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.
Location:
London
Job Type:
FullTime

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