{"id":3605383,"url":"https://alion.io/job/valarian-ui-engineer","title":"UI Engineer","company":{"id":690001,"name":"Valarian","domain":"valarian.com","url":"https://alion.io/company/valarian","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":89,"open_postings":7,"ghost_share":0,"stale_share":0.429,"repost_share":0,"time_to_fill_p50_days":59,"computed_at":"2026-11-05T05:54:30Z"}},"role":"Frontend","role_family":"Frontend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","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":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Cypress","optional":false},{"name":"Espresso","optional":false},{"name":"Figma","optional":false},{"name":"GraphQL","optional":false},{"name":"Java","optional":false},{"name":"Jest","optional":false},{"name":"Kotlin","optional":false},{"name":"Least Privilege","optional":false},{"name":"Offline-First","optional":false},{"name":"Playwright","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"State Management","optional":false},{"name":"Swift","optional":false},{"name":"Threat Modeling","optional":false},{"name":"TypeScript","optional":false},{"name":"WebSockets","optional":false},{"name":"XCTest","optional":false},{"name":"Zero Trust","optional":false},{"name":"Datadog","optional":true},{"name":"Fastlane","optional":true},{"name":"GitHub Actions","optional":true},{"name":"JavaScript","optional":true},{"name":"Sentry","optional":true},{"name":"WebAssembly","optional":true}],"status":"live","first_seen_at":"2026-11-02T11:13:28Z","employer_posted_date":"2026-11-02","last_verified_at":"2026-11-05T11:17:20Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Valarian Technologies is a dual-use technology company building critical tools to safeguard the future in an era of evolving global security challenges. We're rethinking security beyond traditional military domains, addressing asymmetric threats that impact our technological advantage, economic strength, and democratic institutions.\nWe build Acra - the platform foundation for everything we do as a dual-use technology company. The platform’s name, rooted in the Greek word for citadel (or, fortress), reflects the design and purpose of our infrastructure-agnostic secure enclaves: protecting critical data. Some of the government and commercial workflows include: increased operational resiliency for mission-critical systems and functions; enabling organisations to more quickly and widely adopt emerging technologies while ensuring the integrity of their intellectual property; information flow during disaster response scenarios, and zero-trust / least-privilege environments for M&A, attorney-client privileged communications, etc. And we’ve only scratched the surface.\nAt our core, we're driven by a shared mission and a belief in making a tangible impact on our world. Whether you join our London HQ or the wider global organisation, you’ll be a part of collaborative, high-performing teams, creating cutting-edge software, platforms, and infrastructure.\nThe Role\nYou will design, build, and maintain mission-critical user interfaces for Acra, our secure-enclave platform protecting sensitive government and commercial workflows.\nYou will bridge web and native mobile environments-working primarily with React/TypeScript for complex web dashboards and administrative consoles, alongside native mobile platforms using Swift (iOS) or Kotlin/Java (Android) to deliver responsive, zero-trust client applications for operators in the field. You will own front-end systems end-to-end: from UI architecture, state management, and API integration down to client-side performance, local encryption, accessible design systems, and cross-platform reliability.\nYou will help shape the frontend delivery foundations, including modular component architectures, CI/CD testing pipelines, web and mobile packaging, offline-first sync strategies, and secure local storage.\nACRA’s architecture separates the control plane, platform enforcement layer, and isolated execution environments. This role requires someone who can build fluid, intuitive interfaces while reasoning clearly about client-side trust boundaries, data leakage prevention, authentication flows, and operational security.\nThis is not a role for someone who only wants to take tickets. We are looking for someone who understands the product vision, advocates for user safety and accessibility, challenges assumptions, and translates ambiguous workflows into crisp, resilient user experiences.\nWhat you’ll do:\nArchitect and build high-performance, accessible, and secure user interfaces across React/TypeScript and native mobile clients (Swift/iOS or Android).\n\nOwn client applications from technical design and UI component implementation through to testing, deployment, observability, and production operations.\n\nIntegrate complex RESTful and WebSocket/event-driven APIs, handling real-time data streaming, optimistic updates, and offline/low-bandwidth resilience.\n\nBuild and maintain a scalable design system that ensures aesthetic consistency, compliance, and strict usability across both desktop and mobile form factors.\n\nAddress client-side security concerns: secure token handling, biometric authentication, encrypted local cache, certificate pinning, and zero-trust session management.\n\nPartner closely with product managers, UX designers, backend engineers, and security specialists to turn mission-critical requirements into clear interfaces.\n\nDiagnose and optimize UI performance bottlenecks across browsers and mobile hardware (frame rates, bundle size, memory footprint, battery impact).\n\nEstablish frontend and mobile testing best practices (unit, component, and end-to-end integration tests).\n\nRaise engineering standards through design reviews, accessible code practices, and thorough documentation.\n\nOperate independently in a fast-paced environment with strong ownership and product thinking.\n\nWhat we are looking for:\nStrong professional engineering experience building production-grade web applications with modern React and TypeScript.\n\nSolid hands-on native mobile development experience with Swift (iOS) or Kotlin/Android (or proven experience bridging cross-platform architectures with native modules).\n\nDeep understanding of modern UI architecture, state management paradigms, and responsive design systems.\n\nExperience consuming, designing, and optimizing APIs (REST, WebSockets, or GraphQL) for client performance and intermittent connectivity.\n\nFamiliarity with client-side security fundamentals (content security policies, token management, secure device storage, threat modeling at the client layer).\n\nStrong track record of end-to-end feature ownership from Figma mocks to app deployment and post-release monitoring.\n\nDisciplined approach to automated testing (Jest, React Testing Library, XCTest/Espresso, Playwright/Cypress).\n\nExcellent debugging skills across web browsers, native mobile runtimes, device profiles, and network conditions.\n\nProduct-minded engineering judgment: you care deeply about how users navigate critical workflows, not just what ticket needs to be resolved.\n\nA self-driven, ownership-oriented mindset comfortable with technical ambiguity and fast feedback loops.\n\nNice to have:\nExperience building interfaces for secure or regulated environments (defence, government, cybersecurity, fintech, or critical infrastructure).\n\nFamiliarity with WebAssembly (Wasm), client-side cryptography, or zero-knowledge protocols.\n\nHands-on experience with native mobile app deployment, MDM (Mobile Device Management) enterprise distribution, or App Store / Play Store governance.\n\nExperience with real-time collaborative interfaces, mapping/GIS visualisations, or tactical telemetry dashboards.\n\nFamiliarity with container-based frontend workflows, mobile CI/CD pipelines (Fastlane, GitHub Actions), and frontend observability tools (Sentry, Datadog RUM).\n\nSystems where auditability, accessibility compliance (WCAG 2.1+), and operational evidence are first-class requirements.\n\nBenefits:\nOur benefits are designed to ensure our employees feel taken care of and are proud to be a part of the Valarian team. We are committed to consistently enhancing our benefit package, taking into account the overall well-being and needs of our teammates. Here are the key benefits accessible to all employees at Valarian Technologies:\nEquity - because you have the right to own what you’re building\n\nA competitive salary - because we value your unique skills\n\nEmployer pension contributions - because you deserve a secure future\n\nPrivate health insurance - because your health is important to us\nHybrid work setup - because everyone has different needs\n\nRewarding company retreats and meetups that respect your work/life balance - because we love getting to know each other!\n\nLife at Valarian\nOur culture is built on inclusivity, compassion and flexibility - we want everyone to be empowered to achieve their goals at Valarian.\nThe work we do is vital, but so are the connections that make it happen. We thrive on the shared energy, spontaneous conversations, and mutual trust built when we spend time together. We operate on a hybrid model, gathering in our London office 3 days a week to support one another and collaborate.","description_format":"text","description_chars":7610,"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":["Equity","Health insurance","Hybrid work"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Governance & Compliance"],"lifecycle":[{"event":"open","at":"2026-11-02T11:37:49Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":59,"reasons":["conf:5","velocity","win:early"],"computed_at":"2026-11-05T05:54:30Z"},"pay":null,"html_url":"https://alion.io/job/valarian-ui-engineer","json_url":"https://alion.io/job/valarian-ui-engineer.json","meta":{"generated_at":"2026-11-05T12:09:31Z","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":15672,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"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":690001},"rest":"https://alion.io/mcp/rest/get_company?id=690001"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fvalarian-ui-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%2Fvalarian-ui-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%2Fvalarian-ui-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/valarian-ui-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fvalarian-ui-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3605383}},{"tool":"search_jobs","arguments":{"company":"valarian.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3605383},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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