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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Software Engineer - **Company:** Beryl - **Location:** London, UK - **Experience:** Expert - **Salary:** £65,124.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Android Software Development, Cloud Computing, Code Review, Continuous Integration, Relational Databases, Mobile Application Software, Python (Programming Language), PostgreSQL, Live Connect (Windows), Message Queuing Telemetry Transport (MQTT), TypeScript, Web Applications, Datadog, Circleci, Google Cloud, ReactJS, Flask (Web Framework), Backend, Fastapi, Kubernetes, Sentry, Google Bigquery, Graphql, React Native, Front End Software Development, Terraform, Docker, Microservices - **Published:** August 28, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5858413655 ## About the Role * Enough range to work confidently outside it. You don't need to be expert everywhere, but you should be comfortable reading and contributing across the stack * Comfort with relational databases and designing schemas that hold up * Pride in readable, well-tested software, and the ability to explain why a design is the right one * The judgement that comes with seniority: knowing what to build, what to leave alone, and when to say so Great if you have it, fine if you don't: * Any of the three areas above that isn't your main one * Docker and containerised applications * Building and consuming REST and GraphQL APIs * Kubernetes, Terraform, or GCP * Experience working with AI coding agents * IoT and distributed connected hardware in the real world ## Description You'd join our Software team. Supporting a react-native multi platform customer mobile app, an react-native android app used by our operations teams, an automated tasking engine, python backend microservices deployed on Kubernetes in our GCP infrastructure.. We're a small team, so the work is varied and you'll touch most of the stack. In your first six months we'd expect you to: * Own problems end to end, from an ambiguous "riders are reporting X" through to a fix in production * Shape architecture, not just implement it: you'll be in the room when we decide how a new system should work, and we want you pushing back when we're wrong * Get to know a significant area of the platform well and become someone the team turns to when decisions come up there * Raise the bar around you through code review, pairing and sharing knowledge We're not looking for someone strong in everything. We're looking for genuine depth in one area; mobile, backend or frontend, plus enough range to work confidently across the others. If you're a Python engineer who's comfortable in React, or a React Native developer who can hold their own on a backend service, please apply. We're evolving how to fit AI into our workflow responsibly, whilst continuing to focus on quality and a good understanding of our codebase. Our technology stack consists of: * React Native mobile applications * React web applications * GraphQL layer using Apollo Server and Apollo Client * Python services running Flask and FastAPI * Kubernetes based microservice architecture running on Google Cloud Platform * Cloud Postgres and Google BigQuery datastores with DBT data transformations * Google PubSub and MQTT messaging * Terraform infrastructure orchestration * CI/CD via CircleCI and Helmfile (server) and Bitrise (mobile) * Error reporting using DataDog and Sentry * Claude code What we're looking for Depth in at least one of these: * Backend - Python in production, including running and supporting live services * Frontend - TypeScript and modern JavaScript, with real React experience beyond the basics: context, async state, composition patterns * Mobile - React Native and shipping to the app stores, Equalities Act we are committed to continuing to improve our workplace culture and environment. To make sure we are supporting all staff, we have two mental health first aiders and take care to look out for one another. We value employees from diverse backgrounds and family arrangements, and have flexible working policies that support our staff in balancing their personal and work lives. ## Related Videos - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) - [Putting the Graph In GraphQL With The Neo4j GraphQL Library](https://www.wearedevelopers.com/videos/257-putting-the-graph-in-graphql-with-the-neo4j-graphql-library) - [From Doubt to Confidence: How Sentry Uses Verdaccio to Bulletproof SDK Releases](https://www.wearedevelopers.com/videos/739-from-doubt-to-confidence-how-sentry-uses-verdaccio-to-bulletproof-sdk-releases) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [GraphQL + Apollo + Next.js: A Lovely Trio](https://www.wearedevelopers.com/videos/311-graphql-apollo-next-js-a-lovely-trio) - [Debugging in the Dark](https://www.wearedevelopers.com/videos/1658-debugging-in-the-dark) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [The Best Software Developer Blogs to Read](https://www.wearedevelopers.com/magazine/156-the-best-software-developer-blogs-to-read) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)