{"id":766151,"url":"https://alion.io/job/addenenergy-senior-battery-engineer","title":"Senior Battery Engineer","company":{"id":670036,"name":"Adden Energy","domain":"addenenergy.com","url":"https://alion.io/company/addenenergy","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Energy","role_family":"Energy","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":["Waltham, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":99000,"max_usd":180000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":148},"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":true,"technologies":[],"status":"live","first_seen_at":"2025-11-17T21:55:50Z","employer_posted_date":"2025-11-17","last_verified_at":"2026-11-09T03:04:17Z","board_verified":true,"closed_at":null,"days_open":356,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":356},"description":"About Adden Energy\nAdden Energy is developing solid-state batteries for automotive and consumer applications and is located in the Boston Area. Our technology is based on leading research from Harvard University, and our team is backed by prominent venture capital investors.\nWe are looking for a Senior BatteryEngineer to join our growing technical team and work to scale our technology. As a key member of our team, you will make a substantial impact on the company’s future and set the stage for how we build batteries for years to come as we work to make a positive impact on climate change.\n What you get to do:\nDesign and develop pilot scale processes for manufacturing solid state battery cells \nAssemble battery cells by using notching, stacking, welding, and packaging processes \nWork with vendors to customize the equipment and tools based on manufacturing processes \nMaintain, modify, and optimize the equipment and tools with vendor’s guidelines \nWhat you bring to this role:\nAdvanced degree in mechanical or chemical engineering or related field \n5+ years of experience in a cell fabrication role in a Li ion battery industrial environment \nGroup leading experience is preferred \nHands-on experience with multi-layer large format pouch cell assembly processes \nExperience with all-solid-state-battery development is strongly preferred \nExperience of vendor qualification and customer interactions \nA desire to hold your own in a fast-moving environment alongside highly technical peers \nAbility to work safely and in compliance with all regulations and quality systems \nWe are happy to offer our team members:\nCompetitive salary versus leading employers in industry, commensurate with experience\nMedical, dental, and vision insurance\nGenerous employee stock options\nThree weeks paid time off\nU.S. Visa Sponsorship possible\nAdden Energy is interested in working with every qualified candidate regardless of current U.S. work authorization, and would consider sponsoring visas.\nWe value diversity and do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability 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