Senior Software Engineer

FYRE Global; City Of London; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A tech-for-good startup in London seeks a Senior Software Engineer to build and scale Node.js applications while driving code quality and architectural improvements. The ideal candidate has strong backend development experience, preferably with Node.js, and is comfortable with AWS and React. This hybrid role involves working closely with product and engineering teams to prioritize and deliver features in a dynamic environment. Join a small, ambitious team to help shape the product's future.

Qualifications

• Strong hands-on experience with Node.js – backend software development.
• Comfortable with AWS and React; experience is a bonus.
• Enthusiasm for writing clean, tested, production-ready code.

Responsibilities

• Building and scaling a Node.js application at the core of the product.
• Designing and implementing features for different sectors.
• Driving improvements in code quality, architecture, and testing practices.

Skills

Node.js

AWS

React

Data-heavy systems

Clean code practices

Job description

Senior Software Engineer – Node.js / Backend Development – London (Hybrid, 3 days onsite)

Are you the kind of Senior Software Engineer who enjoys taking something fast‑and‑scrappy and turning it into something scalable, elegant, and genuinely robust?

This is a chance for a Senior Software Engineer to join a small, but ambitious tech‑for‑good / IoT start‑up based in the London City Centre that’s building products to make sense of massive data streams. You’ll be part of a tight‑knit team (around ten people total, five software engineers), working on a genuinely greenfield platform with a modern stack and zero legacy.

The focus now is on maturing the codebase – re‑architecting, refactoring, testing, and scaling. As a Senior Software Engineer, you’ll play a key role in helping the team evolve from early‑stage speed to long‑term stability, with the freedom to influence both product direction and engineering quality.

What you’ll be doing:

• Building and scaling a Node.js application that sits at the core of the product.
• Designing and implementing new features for different sectors and use cases.
• Helping drive improvements in code quality, architecture, and testing practices.
• Working closely with product and engineering to prioritise, shape, and deliver features.
• Introducing best practices and guiding a shift towards cleaner, more maintainable code.

What we’re looking for:

• Strong hands‑on experience with Node.js – backend software development.
• Comfortable working across or picking up other tech as needed – e.g. AWS, React (experience with AWS & React is a bonus).
• Enthusiasm for writing clean, tested, production‑ready code.
• Experience (or interest) in data‑heavy systems, IoT, or connected devices.
• Ultimately, this is a backend focussed position, so as a Senior Software Engineer you’ll have to be comfortable with the backend nature of the role.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology

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