Engineering · We're hiring
Senior Backend Software Engineer
£55k–£65k
Ready to build software that's accelerating the clean-energy rollout? We're Payaca, the operating system for the installers putting solar, heat pumps and batteries on roofs across the UK and US. We're looking for a Senior Backend Software Engineer to join our small but mighty team in Bristol.
About Payaca
Payaca is the operating system for clean-energy installers, the businesses putting solar, heat pumps, battery storage and EV chargers on homes and businesses across the UK and US. We bring quoting, scheduling, job management, invoicing and compliance into one place built for how these companies actually work.
These are growing businesses that have outgrown spreadsheets and generic trade software. We give them tools designed for their world, so they can win more work, run more efficiently, and scale.
Clean energy is being installed faster than ever, and the installers doing that work are at the centre of it. The better they run, the faster it happens.
About the role
You'll be working across the codebase, with a focus on our backend monolith. We don't have dedicated Product Managers, so you'll have the freedom and responsibility to make key decisions yourself, in collaboration with the rest of the team. This is a chance to have a direct impact on our product and our mission.
What you'll do
- Take user requirements and build solutions across our backend services and APIs
- Establish user requirements through a deep understanding of the customer's needs
- Tackle technical debt to improve the quality of the codebase
- Mentoring your peers, helping them improve
Tech stack
Frontend
React, React Native/Expo, TypeScript, Tailwind, Figma
Backend
Node.js, TypeScript, PostgreSQL, GraphQL
Infrastructure
Google Cloud Run, Firebase Hosting, Terraform, CircleCI
Developer experience
Monorepo, pnpm, MacBook
AI tools
Claude Code, GitHub Copilot
Requirements
- 4+ years of experience with Node.js (or another backend language) and TypeScript
- 3+ months experience in leveraging AI agents
How we work
We're an office-first team based in central Bristol. After morning standups, most days are clear for focus time, and we keep meetings to a minimum so you can do deep work.
AI is not a side project here, it is how we work. We've built an organisation of AI agents that runs alongside the human team. They sync our data, handle the tedious updates that used to eat whole afternoons, surface what actually needs a human, and even coach us with feedback on our own work. The result is that you spend your time on the things that genuinely need you, not on admin a machine should be doing.
You'll be expected to use these tools every day, to lean on them hard, push their limits, and help us find the next thing they can take off our plates. We're genuinely at the edge of AI tooling adoption and we move fast. If that excites you, you'll love it here. If the idea of working this closely with AI makes you uncomfortable, this honestly isn't the place for you, and that's okay.
We're a small team, so you'll have real ownership of your work and the freedom and responsibility to make the key decisions yourself.
We value diverse perspectives and encourage you to apply even if you don't tick every box.
Benefits
Interview process
- 1
Meet the team (30-minute interview)
An informal chat to assess general compatibility and give you a chance to ask us questions.
- 2
Technical take-home (~2 hours + 45-minute interview)
You'll receive a dummy GitHub repository and a feature request to implement. We want to see how you work and how you approach a problem using your preferred tools. We'll then discuss your solution and its trade-offs.
Apply for this role
Fill out the form below and we'll be in touch.