{"id":330969,"url":"https://alion.io/job/hexa-acoustic-researcher","title":"Acoustic Researcher","company":{"id":6140,"name":"HEXA","domain":"myhexa.com","url":"https://alion.io/company/hexa","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":true,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":83,"open_postings":26,"ghost_share":0.192,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":63,"computed_at":"2026-10-28T05:59:10Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":null,"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":56000,"max_usd":122000,"period":"year","method":"role_country_seniority_unknown","sample_n":121},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Machine Learning","optional":false},{"name":"Multimodal AI","optional":false},{"name":"NumPy","optional":false},{"name":"Python","optional":false},{"name":"SciPy","optional":false},{"name":"Synthetic Data","optional":false}],"status":"live","first_seen_at":"2026-08-24T16:43:43Z","employer_posted_date":"2026-08-24","last_verified_at":"2026-10-28T18:29:07Z","board_verified":true,"closed_at":null,"days_open":65,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":64},"description":"Full-time · On-site (Paris Marseille)\nThe sea is the physical layer of the economy-the conduit for our energy, communications, and trade. It is also Europe’s exposed flank. Pelagon is building the answer.\nFounded by Aymeric (serial deeptech entrepreneur; founded & exited Scortex, Leading AI solution for manufacturing quality) and Gauthier (Navy officer and McKinsey), Pelagon is building a foundational multimodal acoustic model for autonomous maritime protection (underwater and surface) in service of European sovereignty. It will be deployed on a distributed, autonomous network of vectors (UUVs, buoys, sailbuoys, seabed…) to provide real-time understanding of underwater threats.\nFrance and Europe have world-class acoustic engineers and a long history in underwater warfare. By bridging this expertise with modern physical-AI strategies (as seen in autonomous driving and robotics). Europe is still missing it’s naval NeoPrime, Pelagon aims to become to lead the way in autonomous marine protection-from detection to interception-partnering with leading navies, primes, and neo-primes, while also operating its own fleet as a service.\nPelagon is backed by Hexa, the pioneer startup studio in Europe, which has launched 35+ companies, including unicorns like Front, Aircall, and Spendesk, combining €230m+ ARR and €750m raised.\nWhy this matters\nThe sea is the physical layer of the economy - and Europe's most exposed flank. Everything that moves beneath the surface leaves an acoustic trace, but the ocean is a brutal channel: multipath, ambient noise, shifting propagation. Reading it is first and foremost a physics problem.\nFrance and Europe have a world-class heritage in underwater acoustics and sonar. Pelagon's bet is to bridge that science with modern physical-AI strategies and a distributed fleet of UUVs, buoys, sailbuoys and seabed sensors. As our Acoustic Researcher, you are the physics backbone of that system - the person who understands underwater sound deeply enough that our models can learn from it. You partner directly with our AI Engineers, who consume the features, representations and data you help define.\nWhat you'll do\nModel underwater sound propagation across realistic ocean environments to enable our synthetic data generation pipeline.\n\nCharacterize and classify acoustic signatures of surface and underwater targets; build the ground-truth understanding our multimodal acoustic model is trained against.\n\nDesign and reason about sensor and array geometries: what to deploy, where, and how to extract maximum information from constrained & distributed vectors.\n\nWork hand in hand with AI Engineers on physics-constrained learning strategies ans models.\n\nWhat we look for\nDeep grounding in underwater acoustics, sonar, or a closely related field (ocean acoustics, radar/array processing, acoustic signal processing). PhD or equivalent research experience.\n\nStrong command of statistical signal processing: detection & estimation theory, array processing, time-frequency analysis.\n\nFluent in Python (NumPy/SciPy) for modeling, simulation and analysis; comfortable working with large datasets.\n\nA builder's instinct, you want your work deployed at sea, not left in a paper. Bias toward validating ideas against real data.\n\nBonus: prior experience using machine learning on acoustic signals, naval / defense domain experience.\n\nWhy join now\nFounding ownership. You'll be one of the first engineers and will define the technical foundation of the company. Meaningful equity comes with that.\n\nA mission with weight. This is hardware that protects critical infrastructure and Europe's maritime space.\n\nReal things, in the real ocean, fast. You'll see your work in the water within weeks, not years.\n\nAI-first, at the edge, in the real world. We train our own models and run them where it counts: in the water, on the device. You'll be solving the edge-ML and power problems most companies only talk about.\n\nA sovereign, European deeptech at the inflection point of a market with strong NATO and EU policy momentum behind it.","description_format":"text","description_chars":4057,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"phd","optional":true},"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Venture Capital","Angel Networks & Startup Accelerators"],"lifecycle":[{"event":"open","at":"2026-09-05T17:27:04Z"}],"visa":[],"liveness":{"score":30,"band":"fade","label":"Fading","p_open":1,"p_active":0.677,"p_room":0.44,"age_days":64,"expected_fill_days":63,"reasons":["conf:1","win:tail","crowd:"],"computed_at":"2026-10-28T05:59:10Z"},"pay":null,"html_url":"https://alion.io/job/hexa-acoustic-researcher","json_url":"https://alion.io/job/hexa-acoustic-researcher.json","meta":{"generated_at":"2026-10-28T22:14:19Z","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":30061,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-29T00:00:00Z"}},"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":6140},"rest":"https://alion.io/mcp/rest/get_company?id=6140"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fhexa-acoustic-researcher"},{"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%2Fhexa-acoustic-researcher"},{"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%2Fhexa-acoustic-researcher"},{"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/hexa-acoustic-researcher\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fhexa-acoustic-researcher"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":330969}},{"tool":"search_jobs","arguments":{"company":"myhexa.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":330969},"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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