Full Stack Engineer
Posted 28 May 2026
Advertised as “Senior Full Stack Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Management level
- People management
- Employment
- Hybrid
- Visa sponsorship
- Not offered
No salary listed for this role.
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Our UK team of 25 is based in Central Manchester, helping British police forces replace outdated, fragmented systems with modern, resilient software.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.
If you were on the team last week, you might have:
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Designed and shipped a new workflow for custody officers processing detainees, from GraphQL schema through to React components
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Investigated a production issue using Datadog traces and logs, then pushed a fix the same day
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Paired with a teammate to untangle a tricky state management problem in a booking form
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Built an agentic workflow that reviews PRs, learns from human feedback, and posts weekly engineering highlights to Slack, all automatically
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Managed a cross-team feature end-to-end — designed the architecture, broke work into parallel workstreams, and coordinated junior engineers to deliver on time