{"id":2042041,"url":"https://alion.io/job/lucis-mobile-frontend-engineering","title":"Mobile frontend engineering","company":{"id":678951,"name":"Lucis","domain":"lucis.life","url":"https://alion.io/company/lucis","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":88,"open_postings":10,"ghost_share":0,"stale_share":0.5,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Mobile","role_family":"Mobile","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":51000,"max_usd":101000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":13},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"Expo","optional":false},{"name":"React Native","optional":false},{"name":"AWS","optional":true},{"name":"Claude Code","optional":true},{"name":"Cursor","optional":true},{"name":"GitHub Actions","optional":true},{"name":"JavaScript","optional":true},{"name":"Nest.JS","optional":true},{"name":"Node JS","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Prisma","optional":true},{"name":"React.js","optional":true},{"name":"Terraform","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-07T16:48:38Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-12T07:18:58Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Making preventive health the default for every human in Europe\nThe mission\nAt Lucis, we believe healthcare should be preventive, not reactive. We’re building the OS for human longevity to help people add more healthy years to their lives. You can read more about who we are and how we work here.\nThe role\nWe’ve processed 200,000+ clinical tests across 4 countries with a team of 20. We’re growing 10% week over week. And we’re still early.\nWe’re looking for a mobile frontend engineer who treats the app as a craft, not a checklist. You care about the half-pixel, the spring curve on a transition, the way a screen feels in the hand, and you can build it. You own the mobile experience end-to-end in our monorepo, orchestrate AI to execute, and raise the bar for everyone around you.\nYou won’t spend your days writing boilerplate. You’ll write specs that agents execute, review AI-generated code with a critical eye, and make decisions that compound over time. This is what engineering looks like now. If that excites you, keep reading.\nWhat we’re looking for: Mobile frontend, design engineering & world-class craft\nA confirmed mobile engineer (8+ years) with exceptional craft and a real sensibility for design. You live in Expo and React Native, you care deeply about how the product feels, and you don’t wait for designs to be ready to propose something delightful. You have also experience building native experience. You think in interactions, motion, and detail.\nYou’ll own what members touch every day: onboarding, the core app surfaces, the moments that turn a first-time visitor into someone who trusts us with their health. Your work has to be delightful and reliable on real devices, for people who decide in minutes whether to trust us.\nAbout you\nYou’re passionate about the future of human health and want your work to help people stay healthy for longer. You move quickly from idea to execution, take full ownership of what you build, and work best with talented people who care as much as you do.\nYou thrive in fast-moving environments, learn by doing, and value feedback as a way to continuously improve. You use AI the way others use a calculator: naturally, to go faster and think bigger.\nYou’ll fit in well if\nYou've shipped at least one product from 0→1 and felt the difference between writing code and building a system\n\nYou have 2 deep areas of expertise and can operate across the full stack when the situation demands it\n\nYou write specs before you write code - precise enough that an AI agent executes correctly on the first pass\n\nYou review AI-generated code with the same rigor you'd apply to a junior engineer's PR: edge cases, security gaps, design smell\n\nYou bias toward shipping. A good decision today beats a perfect one next week\n\nYou're genuinely interested in health - maybe you track your own biomarkers, or you're just frustrated that healthcare is still reactive\n\nWe would not be a fit if\nYou need a clearly scoped role before you can operate\n\nYou measure output in lines of code written\n\nYou've only worked in large orgs with dedicated infra, QA, and platform teams\n\nYou optimize for stability over velocity\n\nOur current stack\nTypeScript monorepo · React Native · NestJS · PostgreSQL + Prisma · AWS (Terraform, Qovery) · GitHub Actions · Claude Code + Cursor\nThe process\nIntro call (20 min): culture & role fit.\n\nTechnical interview (30 min)\n\nAt-home case study: hands-on project, delivery in 2 days.\n\nDeep dive (90 min) and team chat (on-site)\n\nReference calls\n\nHow we work\nWe work together from our Paris hub. We’re passionate about what we’re building and believe the fastest way to create something exceptional is side by side. We’re open to relocation support for the right individuals, and we welcome missionaries who travel to work with us in Paris on a regular basis.\nRigor without ego: Audits, science, and code all deserve the same high bar.\n\nRadical ownership: Feedback loops are short; everyone contributes to building the best version of Lucis.\n\nVelocity over perfection: We ship daily and prefer a good decision today over a perfect one next week.\n\nAt Lucis, AI isn't just our product, it's our engine. 100% of our teams are equipped with the best AI agents. 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