Senior Full Stack Engineer
Posted May 29, 2026
Applicants must be authorized to work for any employer in the country in which the role is being hired. We are unable to sponsor or take over sponsorship of an employment visa at this time. Mark43 is a public safety technology company trusted by over 200 police forces worldwide. We build cloud-native software on AWS that police forces and emergency services rely on in their most critical moments, from managing custody records to dispatching officers in the field. Our UK team of 25 is based in Central Manchester, helping British police forces replace outdated, fragmented systems with modern, resilient software. We're part of a 400-person global company, but the UK team operates with startup energy: small enough that your work is visible, big enough that you're backed by serious investment. We're hiring Senior Software Engineers who want to build systems that genuinely matter. What You'll Do
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.