{"id":466124,"url":"https://alion.io/job/mark43-senior-full-stack-engineer","title":"Senior Full Stack Engineer","company":{"id":179529,"name":"Mark43","domain":"mark43.com","url":"https://alion.io/company/mark43","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":80,"open_postings":24,"ghost_share":0.25,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":87,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Manchester, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":119000,"max_usd":221000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":3667},"experience_years_min":null,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"ChatGPT","optional":false},{"name":"Claude Code","optional":false},{"name":"Datadog","optional":false},{"name":"GraphQL","optional":false},{"name":"React.js","optional":false},{"name":"Slack","optional":false},{"name":"ArgoCD","optional":true},{"name":"Copilot","optional":true},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"MySQL","optional":true},{"name":"Spring Boot","optional":true},{"name":"Terraform","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-05-28T18:22:58Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-26T03:28:25Z","board_verified":true,"closed_at":null,"days_open":150,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":150},"description":"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.\nMark43 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. \nOur 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. \nWe're hiring Senior Software Engineers who want to build systems that genuinely matter. \nWhat You'll Do \nYou'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: \nFrontend: React, TypeScript\nBackend: Java, Spring Boot\nData: MySQL, GraphQL\nInfrastructure: AWS, Kubernetes, Argo CD, Terraform\nObservability: Datadog \nWe'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. \nIf you were on the team last week, you might have: \nDesigned and shipped a new workflow for custody officers processing detainees, from GraphQL schema through to React components \nInvestigated a production issue using Datadog traces and logs, then pushed a fix the same day \nPaired with a teammate to untangle a tricky state management problem in a booking form \nBuilt an agentic workflow that reviews PRs, learns from human feedback, and posts weekly engineering highlights to Slack, all automatically \nManaged a cross-team feature end-to-end - designed the architecture, broke work into parallel workstreams, and coordinated junior engineers to deliver on time \nReviewed a pull request, spotted a change that would unintentionally affect other parts of the app, and directed a safer approach in the comments \nPrototyped 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 \nWhat You'll Need \nYou 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. \nYou should have: \nProfessional software engineering experience, including ownership of complex systems and delivery of large-scale technical initiatives \nExperience mentoring and supporting other engineers \nStrong technical judgement and the ability to make architectural decisions \nExperience leading projects across multiple teams or domains, influencing technical direction beyond your immediate area \nA strategic mindset, with the ability to balance immediate delivery with long-term technical health \nExperience with our stack: Java, JavaScript, TypeScript + React, and MySQL \nExperience with AI-assisted development tools like Claude Code and how they can improve your workflow \nA strong sense of ownership and accountability for both technical outcomes and team success \nConfidence operating in ambiguous environments and helping teams navigate technical trade-offs \nA collaborative mindset and strong communication skills \nWhat We Offer \n28 days holiday plus UK bank holidays \nPrivate medical, dental, and vision insurance through AXA Health and BUPA, fully paid for you and your dependents \n18 weeks paid parental leavefor primary caregivers plus a ramp-back programme \n Income protection (75% of salary) and death in service cover (4x salary), fully paid \nPension through Nest with 3% employer contribution \nGym reimbursement for you and your partner \nEquipment allowance to set up your home office \nAI tooling including Claude Code Enterprise and ChatGPT Enterprise licences provided \nSpring Health membership with therapy sessions and mental wellness tools, fully covered \nCompany performance-based bonus \nPaid sabbatical of one month at your five-year anniversary \nBiannual hackathons, learning budget, and a team that genuinely invests in your growth \nWhat We Value \nHumility. You know the best ideas win, no matter where they come from. You ask questions before making assumptions and you're as happy being wrong as being right, because either way, the team gets to a better answer. \nInclusivity. You respect expertise in all its forms and actively seek out perspectives different from your own. You make space for others and assume good intent. \nExcellence. You care about quality in your code, your reviews, and how you communicate. You're not satisfied with \"it works\" when it could be better, and you encourage the same standard in those around you. \nDiligence. You take ownership, mind the details, and understand that the software we build is used in moments that genuinely matter. You don't cut corners when people are depending on the outcome. \nLocation \nThis role is based at our Central Manchester office and follows a hybrid work model. \nApplicants must be authorised to work in the UK. We are unable to sponsor or take over sponsorship of an employment visa at this time. \nThis role may require you to complete Non-Police Personnel Vetting (NPPV) security clearance up to level 3. \nMark43 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. \nOur Privacy Notice describes how Mark43 uses and protects the personal information of prospective employees during the recruitment process. It informs you about our handling of the personal information you provide to us when you apply for a position in our organization and in general when you express your interest in joining our team.\nAs a part of Mark43's security measures all employees must: Engage in appropriate use of the company's electronic information resources; Become knowledgeable about and follow relevant security policies and guidelines; Protect the resources under their control, such as passwords, computers, and data that they create, receive, or download; and Promptly report security-related incidents and violations, and responding to official reports of security incidents involving their systems or accounts.\nMark43 is committed to the full inclusion of all qualified individuals. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex disability, age, sexual orientation, gender identity, national origin, veteran status, or genetic information. As part of this commitment, we will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed, please email  requesting the accommodation.","description_format":"text","description_chars":7995,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Home office","Hybrid work","Parental leave","Vision insurance"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Law Enforcement","Digital Government"],"lifecycle":[{"event":"open","at":"2026-09-06T12:16:24Z"},{"event":"close","at":"2026-10-23T17:29:22Z"},{"event":"reopen","at":"2026-10-23T21:32:22Z"}],"visa":[],"liveness":{"score":28,"band":"fade","label":"Fading","p_open":1,"p_active":0.765,"p_room":0.36,"age_days":150,"expected_fill_days":87,"reasons":["conf:2","velocity","win:tail","crowd:"],"computed_at":"2026-10-26T05:57:25Z"},"pay":null,"html_url":"https://alion.io/job/mark43-senior-full-stack-engineer","json_url":"https://alion.io/job/mark43-senior-full-stack-engineer.json","meta":{"generated_at":"2026-10-26T07:08:27Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":9478,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":179529},"rest":"https://alion.io/mcp/rest/get_company?id=179529"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmark43-senior-full-stack-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmark43-senior-full-stack-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmark43-senior-full-stack-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/mark43-senior-full-stack-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmark43-senior-full-stack-engineer"}]}