Mark43

Public Safety Technology

SeniorFullStackEngineer

£90–125k Manchester, England, United Kingdom Remote Friendly
Market Sentiment
HIGH DEMAND

Neural analysis suggests this role is
optimal for Senior candidates.

The Brief

“Senior Full Stack Engineer at Mark43. Skills: Full Stack Development, Cloud-native software, AI integration. Work across the full stack. Build software for police custody suites”

What You'll Achieve.

Build systems that genuinely matter; Deliver on time

Industry & Context.

Public Safety Technology
Problems you'll solve

Investigated a production issue; Untangle a tricky state management problem; Navigating technical trade-offs

Eligibility Requirements

Authorized to work in the UK, Complete Non-Police Personnel Vetting (NPPV) security clearance up to level 3

What They're Looking For.

Must Have

Professional software engineering experience, Ownership of complex systems, Delivery of large-scale technical initiatives, Experience mentoring and supporting other engineers, Technical judgement, Ability to make architectural decisions, Experience leading projects across multiple teams or domains, Influencing technical direction beyond your immediate area, Strategic mindset, Ability to balance immediate delivery with long-term technical health, Experience with Java, Experience with JavaScript, Experience with TypeScript, Experience with React, Experience with MySQL, Experience with AI-assisted development tools, Sense of ownership and accountability, Confidence operating in ambiguous environments, Helping teams navigate technical trade-offs, Collaborative mindset, Communication skills

Nice to Have

AI tools are part of how we work every day, Comfortable working alongside AI, Keen to push what's possible with AI

What You'll Do.

Work across the full stack

Build software for police custody suites

Own features end-to-end

Investigate production issues

Build agentic workflows

Automate routine work

Accelerate code review

Manage cross-team features

Coordinate junior engineers

Experiment with new tech

How You'll Work.

Team & Collaboration

Paired with a teammate; Managed a cross-team feature end-to-end; Coordinated junior engineers; Reviewed a pull request; Directed a safer approach in comments; Collaborative mindset

Communication Scope

Communication skills

Process & Methodology

Led projects across multiple teams, Influencing technical direction, Managed cross-team features, Designed architecture, Broke work into parallel workstreams, Coordinated junior engineers, Deliver on time

Full Job Description

Mark43 is approved to hire in Canada, the UK, and 36 U. S. states, including Alabama, Arizona, California (excluding San Francisco), Colorado, Connecticut, Washington D.C., Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin, and West Virginia. Before applying to a remote role, please ensure that you are able to perform the position in one of the states listed above. State locations and specifics are subject to change as our hiring requirements shift. 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

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