{"id":1913487,"url":"https://alion.io/job/callsign-senior-experience-engineer-ftc","title":"Senior Experience Engineer (FTC)","company":{"id":51577,"name":"Callsign","domain":"callsign.com","url":"https://alion.io/company/callsign","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"contractor","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":67000,"max_usd":106000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":104},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"GitLab","optional":false},{"name":"GitLab CI","optional":false},{"name":"GitOps","optional":false},{"name":"JavaScript","optional":false},{"name":"React.js","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false}],"status":"live","first_seen_at":"2026-10-05T15:28:43Z","employer_posted_date":"2026-10-05","last_verified_at":"2026-10-11T21:31:52Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"The Experience team owns the human-facing side of Callsign: the client portal, our demo and client management platform (one platform for the whole client journey, from first demo through to proof of concept, onboarding, integration, analysis and ongoing management), the data-product UIs, and the design system and engineering standards behind all of it.\nThis position is offered as a 12 month fixed-term contract with the successful candidate ideally joining in 2026.\nThe candidate will already need to hold the right to work in the UK.\nWhat you'll do\nProduct & UX\nOwn a product surface (portal domain, demo platform, SDK) and holds its product decision right\nWithin the direction Product sets, decide what ships and how it works.\nTranslate a brief into an MVP and phases, define the success measures for what ships, and reshape or kill work that will not move them. \nYour surface carries a live measurement baseline (adoption, task success, performance) that decisions cite and post-release reviews are judged against; a decision that would change the direction goes to the PM, not around them.\nPropose what to build next from your own product conviction, built from user and client contact, rather than merely executing requests\nBe trusted to ship client-facing work without design review.\nFrontend craft:\nSet the technical standard for the estate: your code is the reference. \nLead the response to performance, accessibility or security findings, and anticipate them at design time.\nFull-stack:\nOwn services and their delivery machinery end-to-end (GitLab pipelines, charts, GitOps, infrastructure)\nDesign API contracts consumers can live with long-term\nExecute cross-repo changes (decommissions, migrations) safely across team boundaries\nLead design review for your surface, where their design docs are the reference alongside your code.\nQuality:\nOwn testing strategy for a surface, including the release regression cycle: coordinate it, keep it honest, and drives flake to zero rather than tolerating it.\nPlatform:\nOwn platform programmes (package-manager and framework migrations, test-framework transitions, runtime upgrades) end-to-end the plan\nTranslate roadmaps into epics others can execute\nMentor junior team members\nRequirements\nKey Responsibilities\nShip across the stack: TypeScript/React frontends, Node services (with some Java in the portal estate), API contracts, GitLab CI/CD, and deployment via Helm, GitOps and Terraform.\nTreat the frontend craft triad - accessibility, performance, security - as engineering, with expectations that rise as you grow.\nBuild with AI as a core part of your workflow, with the verification discipline a regulated product demands.\nLearn the domain deliberately: fraud, identity, authentication, and our clients' operational world, because product decisions made without it are guesses.\nWrite meaningful tests for everything you ship.\nRequired Skills & Experience\nA must:\nSolid JavaScript/TypeScript and React.\nComfort somewhere beyond the frontend: an API, a service, or infrastructure. \nSystem design and architecture, designing features that span frontend, service and configuration. \nEvidence of AI-native working with stated verification.\nA testing instinct: you can design a test approach and defend it.\nHas owned a product surface or platform programme including its worst weeks\nCan architect a frontend estate live (state, contracts, testing, deployment)\nEvidence of raising a team's standards\nDemonstrable product judgement \nNice to have:\nJava in production; design systems or component library work; SDK or library engineering\nData visualisation\nExperience in regulated industries (fintech, identity, payments).\nBenefits\nPension scheme with Scottish Widows\nPrivate medical cover with Vitality\nLife assurance (4x base salary)\nPersonal Learning & Development Budget\nCycle to Work Scheme\nCompany Family Leave\n25 days annual leave plus Callsign Bank Holiday\nEmployee Volunteering Program","description_format":"text","description_chars":3943,"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":["Annual leave","Parental leave"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Fraud Detection","Identity Management"],"lifecycle":[{"event":"open","at":"2026-10-05T15:28:43Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"evidence":"Licensed UK visa sponsor (Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Skilled Worker","cap_exempt":false,"checked_at":"2026-10-10T06:21:00+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":4,"expected_fill_days":45,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-10T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/callsign-senior-experience-engineer-ftc","json_url":"https://alion.io/job/callsign-senior-experience-engineer-ftc.json","meta":{"generated_at":"2026-10-11T21:34:14Z","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":10558,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-12T00:00:00Z"}},"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":51577},"rest":"https://alion.io/mcp/rest/get_company?id=51577"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcallsign-senior-experience-engineer-ftc"},{"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%2Fcallsign-senior-experience-engineer-ftc"},{"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%2Fcallsign-senior-experience-engineer-ftc"},{"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/callsign-senior-experience-engineer-ftc\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcallsign-senior-experience-engineer-ftc"}]}