{"id":40754,"url":"https://alion.io/job/harmattan-c2-software-frontend-engineer","title":"C2 Software Frontend Engineer","company":{"id":8839,"name":"Harmattan AI","domain":"harmattan.ai","url":"https://alion.io/company/harmattan","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":77,"open_postings":23,"ghost_share":0,"stale_share":0.739,"repost_share":0,"time_to_fill_p50_days":74,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Frontend","role_family":"Frontend","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":47000,"max_usd":103000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":13},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"React.js","optional":false},{"name":"Vue.js","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-03-02T11:33:35Z","employer_posted_date":"2026-03-02","last_verified_at":"2026-10-25T19:36:28Z","board_verified":true,"closed_at":null,"days_open":237,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":236},"description":"About Us\nHarmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces.\nOur work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected.\nAbout the Role\nWe are seeking a highly skilled Front-End Engineer to join our C2 Core team in Paris. In this role, you will be responsible for the operator's viewport into the battlefield, building the Human-Machine Interface (HMI) for our tactical Command and Control (C2) system.\nYou will enter a context where cognitive load management is just as critical as software performance. The UI you build will run on tactical PCs in the field, requiring seamless real-time updates for the Common Operational Picture (COP), rendering multiple live video streams, and providing an intuitive interface for planning missions and commanding a fleet of robots.\nResponsibilities\nCOP Visualization: Build interactive maps and 2D/3D geospatial overlays displaying real-time robot telemetry, sensor data, and mission routes.\n\nReal-Time Video Grid: Develop a low-latency, resilient video player interface capable of handling multiple simultaneous streams without freezing the main UI thread.\n\nMission Planning & Command: Create interactive tools for operators to draw waypoints, set mission parameters, and issue instant commands to the fleet.\n\nPerformance Architecture: Design a state management system capable of processing high-frequency data from the backend bus without causing UI jitter or memory leaks.\n\nCollaborative Development: Work closely with UX/UI designers, backend engineers, and mission planning algorithm designers to refine workflows and ensure absolute minimum clicks for the operator.\n\nOptimisation: Ensure the UI maintains strict performance benchmarks, such as consistent 60fps rendering, even during high-frequency map updates.\n\nCandidate Requirements\nEducational Background: B.S. or M.Sc. in Computer Science, Software Engineering, or a related field.\n\nProfessional Experience: At least 5-6 years of experience shipping production-grade web applications with complex data visualisation.\nTechnical Expertise:\n\nDeep understanding of complex state management and real-time data flow.\n\nExperience with geospatial mapping libraries (e.g., Mapbox, Leaflet, Cesium) or rendering APIs (WebGL, Canvas).\n\nFamiliarity with modern frameworks like React or Vue.\n\nDomain Knowledge: Previous experience in defense, aerospace, fintech, or high-reliability domains where real-time data rendering is critical.\n\nUX & Cognitive Load Awareness: High degree of user empathy; ability to design interfaces for high-stress environments where operators cannot afford distractions or confusing error states.\n\nProven Leadership & Ownership: A \"mission-driven\" and \"product-oriented\" mindset with a willingness to take full ownership of the frontend architecture.\n\nAdaptability: Ability to thrive in a fast-paced, multi-disciplinary startup environment.\n\nWe look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.","description_format":"text","description_chars":3412,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Military Drones","Defense Manufacturing","Defense AI"],"lifecycle":[{"event":"open","at":"2026-03-02T11:33:35Z"}],"visa":[],"liveness":{"score":12,"band":"cold","label":"Long shot","p_open":1,"p_active":0.445,"p_room":0.28,"age_days":236,"expected_fill_days":74,"reasons":["conf:1","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/harmattan-c2-software-frontend-engineer","json_url":"https://alion.io/job/harmattan-c2-software-frontend-engineer.json","meta":{"generated_at":"2026-10-25T21:27:31Z","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":30395,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"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":8839},"rest":"https://alion.io/mcp/rest/get_company?id=8839"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fharmattan-c2-software-frontend-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%2Fharmattan-c2-software-frontend-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%2Fharmattan-c2-software-frontend-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/harmattan-c2-software-frontend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fharmattan-c2-software-frontend-engineer"}]}