{"id":2536042,"url":"https://alion.io/job/flex-sr-mechanical-development-engineer-2","title":"Sr. Mechanical Development Engineer","company":{"id":1845316,"name":"Flex","domain":"flex.com","url":"https://alion.io/company/flex-com","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":88,"open_postings":103,"ghost_share":0,"stale_share":0.68,"repost_share":0,"time_to_fill_p50_days":13,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","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":["Littleton, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":126500,"max":173900,"currency":"USD","period":"year","gross":null,"usd_annual":173900},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"SolidWorks","optional":false}],"status":"live","first_seen_at":"2026-10-14T14:18:37Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-16T22:54:30Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"At JetCool, a Flex company, we’re at the forefront of liquid cooling innovation, delivering advanced solutions that empower our partners in AI and high-performance computing. United by a shared purpose, our teams are pushing the limits of what’s possible and tackling complex challenges.\nA career at JetCool offers the opportunity to make a real impact by helping build smarter, more sustainable data centers. Together, we’re not just advancing technology - we’re redefining cooling standards to create a more sustainable tomorrow.\nJob Summary\n\nTo support our extraordinary teams who build great products and contribute to our growth, we’re looking to add a Senior Mechanical Engineer located inLittleton, MA.\nReporting to theProduct Manager, the Senior Mechanical Engineer will play a key role in our product development team. This engineer will contribute to the design, analysis, and validation of advanced liquid cooling systems for processors, servers, and rack-level infrastructure.\nWhat a typical day looks like:\nContribute to design and development of liquid cooling components and assemblies, including cold plates, manifolds, tubing, mounting hardware, and heat exchangers.\nPerform mechanical and thermal analysis, including structural modeling, tolerance analysis, and CFD-assisted design input.\nSupport prototype builds, functional testing, and iterative design refinement.\nCollaborate closely with electrical, thermal, and fluid systems engineers to optimize cooling performance at the processor, server, and rack levels.\nApply Design for Manufacturing (DFM) and Design for Assembly (DFA) these are best practices to ensure scalable, high-quality production.\nWork with suppliers, manufacturing teams, and operations to transition designs from prototype to volume manufacturing.\nCreate engineering documentation, including drawings, models, BOMs, and specification packages.\nParticipate in design reviews and provide technical input to ensure robust, reliable solutions for demanding datacenter environments.\nStay informed on emerging cooling technologies, industry standards, and datacenter trends.\nThe experience we’re looking to add to our team:\nBachelor’s degree in mechanical engineering or related field (master’s preferred).\n6-10 years of mechanical engineering experience, ideally in thermal management, electronics cooling, or complex hardware systems.\nHands-on experience designing components for liquid cooling systems, such as cold plates, heat exchangers, or fluid distribution systems.\nFamiliarity with datacenter thermal challenges, particularly cooling processors, GPUs, and dense computer hardware.\nProficiency in CAD tools (e.g., SolidWorks, Creo) and simulation tools (structural and thermal/CFD).\nStrong understanding of materials, machining, brazing, casting, plastics, and sealing technologies.\nExperience working through prototype, validation, and production release phases of hardware development.\nExcellent problem-solving skills and the ability to work on cross-functional engineering teams.\nExperience with rack-level and row-level cooling strategies (air and/or liquid).\nKnowledge of ASHRAE thermal guidelines or hyperscale datacenter requirements.\nExperience with reliability testing, environmental testing, and root-cause analysis.\nExposure to modular datacenter environments or scalable cooling architectures.\nBO18\nWhat you'll receive for the great work you provide:\nFull range of medical, dental, and vision plans\nLife Insurance\nShort-term and Long-term Disability\nMatching 401(k) Contributions\nVacation and Paid Sick Time\nTuition Reimbursement\n\nApplication Deadline:\nApplications for this job position will be accepted for at least five days following the job posting start date below and continuing until the end date below or until the position is filled. This posting may close sooner due to application volume.\nJob Posting Start Date 10-14-2026 Job Posting End Date 10-16-2026\n\nThe base pay range for this position is provided below. The final base rate offered will be determined using job-related, non-discriminatory criteria, including but not limited to experience, qualifications, geographic location, education, external market data, and internal equity.\n$126,500.00 USD - $173,900.00 USD AnnualJob Category\nDesign, Process & Technology EngineeringIs Sponsorship Available?\nNoJetCool is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email  and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at JetCool, you must complete the application process first).","description_format":"text","description_chars":5094,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Life insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Electronics Manufacturing","Power Supplies & Power Electronics","Contract Manufacturing"],"lifecycle":[{"event":"open","at":"2026-10-14T14:18:37Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":1,"expected_fill_days":13,"reasons":["conf:3","stale_co","velocity","win:early","comp:brand"],"computed_at":"2026-10-16T05:45:00Z"},"pay":{"stated_usd_annual":173900,"is_top_pay":true},"html_url":"https://alion.io/job/flex-sr-mechanical-development-engineer-2","json_url":"https://alion.io/job/flex-sr-mechanical-development-engineer-2.json","meta":{"generated_at":"2026-10-17T03:46:16Z","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":4952,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":1845316},"rest":"https://alion.io/mcp/rest/get_company?id=1845316"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fflex-sr-mechanical-development-engineer-2"},{"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%2Fflex-sr-mechanical-development-engineer-2"},{"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%2Fflex-sr-mechanical-development-engineer-2"},{"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/flex-sr-mechanical-development-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fflex-sr-mechanical-development-engineer-2"}]}