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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Engineer - **Company:** Mark43 - **Location:** Manchester, UK (Remote available) - **Experience:** Expert - **Salary:** £90,000.0 - £125,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Code Review, MySQL, Octopus Deploy, Software Engineering, TypeScript, Datadog, ReactJS, Spring-boot, Backend, Database Migration, Kubernetes, Graphql, Front End Software Development, Software Coding, Terraform - **Published:** July 12, 2026 - **Apply:** https://www.totaljobs.com/job/senior-full-stack-engineer/mark43-job107674860 ## About the Role * Professional software engineering experience, including ownership of complex systems and delivery of large-scale technical initiatives * Experience mentoring and supporting other engineers * Strong technical judgement and the ability to make architectural decisions * Experience leading projects across multiple teams or domains, influencing technical direction beyond your immediate area * A strategic mindset, with the ability to balance immediate delivery with long-term technical health * Experience with our stack: Java, JavaScript, TypeScript + React, and MySQL * Experience with AI-assisted development tools like Claude Code and how they can improve your workflow * A strong sense of ownership and accountability for both technical outcomes and team success * Confidence operating in ambiguous environments and helping teams navigate technical trade-offs * A collaborative mindset and strong communication skills ## Description You'll work across the full stack, building the software that UK police custody suites depend on every day. Our team owns features end-to-end, from database migration to UI and our stack includes: * Frontend: React, TypeScript * Backend: Java, Spring Boot * Data: MySQL, GraphQL * Infrastructure: AWS, Kubernetes, Argo CD, Terraform * Observability: Datadog We're also genuinely investing in how AI changes the way we build software. We don't just use Copilot for autocomplete. We're building agentic workflows into our development process, using tools like Claude Code to automate routine work, accelerate code review, and let engineers focus on the problems that actually need human judgement. If you're excited about shaping how a team works with AI, not just using it, this is the place. If you were on the team last week, you might have: * Designed and shipped a new workflow for custody officers processing detainees, from GraphQL schema through to React components * Investigated a production issue using Datadog traces and logs, then pushed a fix the same day * Paired with a teammate to untangle a tricky state management problem in a booking form * Built an agentic workflow that reviews PRs, learns from human feedback, and posts weekly engineering highlights to Slack, all automatically * Managed a cross-team feature end-to-end - designed the architecture, broke work into parallel workstreams, and coordinated junior engineers to deliver on time * Reviewed a pull request, spotted a change that would unintentionally affect other parts of the app, and directed a safer approach in the comments * Prototyped a new idea at one of the hackathons we run twice a year, a chance to experiment with new tech, explore wild ideas, and ship something fun with no constraints What You'll Need You write clean, maintainable code and care about the impact of your work. We're an AI-first team. AI tools are part of how we work every day - writing code, reviewing pull requests, investigating issues, and automating routine work. We expect you to be comfortable working alongside AI and keen to push what's possible with it. ## Related Videos - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [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) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [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) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)