Senior Software Developer

Senior Software Developer Node.js / AWS / React London (Hybrid, 3 days onsite)

Are you the kind of engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust?

This is a chance to join a small, but ambitious tech-for-good / IoT startup 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 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. 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

• Comfortable working across or picking up other tech as needed ie AWS, React etc (If you have experience with AWS & React, that is a bonus)
• Enthusiasm for writing clean, tested, production-ready code
• Experience (or interest) in data-heavy systems, IoT, or connected devices

If you re an engineer who likes solving real problems, shaping a product, and being part of something early, please apply and have a further conversation