{"id":3149346,"url":"https://alion.io/job/hylight-full-stack-engineer-full-time-position","title":"Full-Stack Engineer - Full-time position","company":{"id":3778823,"name":"HyLight","domain":"hylight.aero","url":"https://alion.io/company/hylight","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Work at a Startup","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":["FR"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":45000,"max_usd":81000,"period":"year","method":"role_country_seniority_unknown","sample_n":469},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"FastAPI","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"Nest.JS","optional":false},{"name":"Next.js","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Slack","optional":false},{"name":"TypeScript","optional":false},{"name":"C++","optional":true},{"name":"Claude Code","optional":true},{"name":"Copilot","optional":true},{"name":"Cursor","optional":true},{"name":"JavaScript","optional":true},{"name":"PostGIS","optional":true}],"status":"live","first_seen_at":"2026-10-23T11:37:03Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-24T13:29:51Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"About HyLight\nPower lines, gas pipelines and railways are still inspected the way they were 50 years ago: by helicopter. Expensive, noisy, and up to a tonne of CO₂ per flight hour.\nWe built the alternative. The HyLighter is a 12-metre autonomous airship running on hydrogen. It flies for up to 10 hours, almost silently, and spots a 1 mm defect from 25 metres up.\nBut the airship is only half the story. Every flight brings back massive amounts of LiDAR, imagery and methane data, and that’s where the value is. Our AI turns it into what operators act on: 50+ types of defects detected automatically, and leaks pinpointed across their network.\nIt’s not a prototype. HyLighters already fly missions for France’s largest energy and rail operators and have flown over the Palace of Versailles. Backed by Y Combinator, we just raised €13M to go from 4 airships to 15.\nWorking at HyLight\nWe design, build and fly every HyLighter, and turn its data into insight, all under one roof on a former airbase. Which means:\nYou own it all the way. At a big aerospace company, you’d own a small piece of one subsystem. Here, you design it, test it, stand on the airfield when it flies, and see the client act on the data it brings back.\n\nWeeks, not years. Ideas go from whiteboard to flight test in weeks.\n\nResponsibility from day one. The founders’ average age is 27. Nobody here waits for permission.\n\nWe don’t care about titles or ticking every box. We care about what you build and the perspective you bring, so if your profile is different, apply anyway.\nJob Summary\nThe Platform Team makes the bridges between each team - building the tools to deliver reliable, unified solutions meant to industrialize our processes and keep everyone focused on what matters most. As we scale toward industrial volume, the bottleneck is no longer just flying - it's everything around the flight. We're looking for an experienced Full-Stack Engineer to join the Platform Team, help us build the internal tools, ground station software, and cross-team automations that keep HyLight moving, and support the existing team in what they're already shipping.\nResponsibilities\nShip internal applications the team relies on every day - mission planning, fleet & inventory tracking, post-flight review, regulatory dashboards, CRM-adjacent tooling.\n\nOwn the business model in code. Embed yourself with the teams you build for, learn how the company actually operates, and translate that into clean data models and the right abstractions.\n\nKill manual workflows. Identify the repetitive, error-prone steps slowing the company down - compliance paperwork, team hand-offs, status updates - and replace them with software.\n\nIntegrate the tools the team already uses (Notion, Slack, GitHub, OnShape) so data flows automatically and a single source of truth exists across the company.\n\nTackle hard, domain-specific problems: help operations turn a vast set of criteria - weather, airspace, regulation, fleet availability, mission objectives - into a concrete flight schedule.\n\nContribute to the ground station - telemetry dashboards, sensor feeds, and pilot-facing tools - working closely with the embedded team on clean contracts between the aircraft and the ground.\n\nDesign and maintain the APIs and services supporting frontend applications and integrations.\n\nBuild automations and AI-powered tools that give the team real leverage.\n\nOwn what's already running: fix bugs, refactor when it earns it, monitor reliability, and make sure what the team depends on every day keeps working.\n\nSkills and experience sought\nEducation & Experience\nBachelor/Master in Computer Science, Software Engineering, or equivalent practical experience.\n\nA few years of experience building and shipping full-stack web applications - we care about what you've built, not where you studied.\n\nTrack record of end-to-end ownership: you've shipped things, dealt with production messiness, and kept going.\n\nGenuine interest in building tools that people inside a company use and depend on every day.\n\nTechnical Skills\nStrong systems thinking: you reason about how components fit together at scale, design for reliability, and make architectural decisions you can live with as the product grows.\n\nFrontend: React / Next.js, TypeScript, TailwindCSS.\n\nBackend: Node.js (NestJS, Express) or Python (FastAPI), REST APIs, PostgreSQL.\n\nFull delivery stack as baseline: Git, Docker, AWS or Railway, CI/CD - these are not bonus points.\n\nTesting: you write tests as part of shipping, not as an afterthought - unit, integration, and end-to-end coverage where it matters.\n\nBonus: GIS / geospatial stacks (MapLibre, Mapbox GL, PostGIS, GeoJSON), C/C++.\n\nSoft Skills\nCurious. You ask why things are built the way they are, and you go figure it out when no one answers.\n\nOpen-minded. You hold opinions strongly, but you change them when shown something better.\n\nGenuinely autonomous. Hand you a fuzzy problem, you come back with a v1 and the right follow-up questions - not waiting to be told the next step.\n\nPassionate. You genuinely care about what you do - you build, you read, you tinker, you have opinions.\n\nAt home in a high-pace environment. Priorities shift, decisions are made fast, reality wins over plans. You see that as fuel, not friction.\n\nAI Leverage\nWe're building HyLight as an AI-native company - not as a buzzword, but as a genuine way of working. We believe the engineers who'll shape the next decade are the ones who've learned to multiply their output with AI, not just occasionally use it.\nYou use AI tools fluently as part of your daily workflow - Cursor, Claude Code, Copilot, or whatever gives you the edge.\n\nYou think about where AI can replace a workflow entirely, not just assist with it.\n\nYou're curious about what's emerging and you experiment - you don't wait for the tooling to be mature.\n\nIf you've built something AI-powered, shipped an internal agent, or just have strong opinions on how to use these tools well - we want to hear about it.\nAdditional requirements\nThis role is based at Base 217, Brétigny-sur-Orge (accessible via RER C). Remote work is part of how we operate, though regular presence on the base matters - it's how you stay close to the teams you build for and understand what they actually need. Flight operations run on their own cadence, which can naturally extend into irregular hours or weekends.\nEnglish is required for internal communication and documentation. French is a plus.\nWhat We Offer\nPotential to become a shareholder in HyLight.\n\nReal ownership and direct impact from day one - you're not a resource, you're a builder.\n\nExcellent work environment: international team, beautiful offices on a former airbase - flights happening right outside the window.\n\nBi-annual offsite trips with the whole team.\n\n100% reimbursement of public transport pass (Navigo) or €800/year for sustainable commuting.\n\nBike provided for commuting.\n\nFree lunch.\n\nAccess to a sauna and gym on-site.\n\nHybrid : remote days can be done.\n\nWhy You Should Join\nFounder Mentality : We value extreme ownership and want people who think like founders-fast decision makers, natural problem solvers, and executers.\n\nGround Floor Opportunity : You’ll be helping to shape and grow a revolutionary company with the resources to back it.\n\nI mpact & Speed : Work in a fast-paced environment where your contributions will have immediate, tangible effects on the company’s success.\n\nInterview Process\nIntroductory phone call (20-30 min)\n\nTake home assessment\n\nTechnical discussion\n\nOn-site meeting with the team (3-4h)\n\nReference Calls\n\nLocation\nOffice : Base 217, Brétigny-sur-Orge, accessible via RER C.\n\nLab and Warehouse access","description_format":"text","description_chars":7673,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":[],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Drones & UAVs","Drone AI"],"lifecycle":[{"event":"open","at":"2026-10-23T11:37:03Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":10,"reasons":["conf:0","win:early"],"computed_at":"2026-10-24T06:02:35Z"},"pay":null,"html_url":"https://alion.io/job/hylight-full-stack-engineer-full-time-position","json_url":"https://alion.io/job/hylight-full-stack-engineer-full-time-position.json","meta":{"generated_at":"2026-10-24T15:41:45Z","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":22578,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-25T00:00:00Z"}},"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":3778823},"rest":"https://alion.io/mcp/rest/get_company?id=3778823"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhylight-full-stack-engineer-full-time-position"},{"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%2Fhylight-full-stack-engineer-full-time-position"},{"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%2Fhylight-full-stack-engineer-full-time-position"},{"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/hylight-full-stack-engineer-full-time-position\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhylight-full-stack-engineer-full-time-position"}]}