{"id":1578835,"url":"https://alion.io/job/ambrosia-energy-embedded-firmware-engineer","title":"Embedded Firmware Engineer","company":{"id":3793713,"name":"Ambrosia Energy","domain":"ambrosia.energy","url":"https://alion.io/company/ambrosia-4","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":84,"open_postings":8,"ghost_share":0,"stale_share":0.625,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-20T05:45:00Z"}},"role":"Hardware","role_family":"Hardware","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Austin, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":91000,"max_usd":177000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":609},"experience_years_min":3,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"C#","optional":true}],"status":"live","first_seen_at":"2026-09-15T22:18:57Z","employer_posted_date":"2026-09-15","last_verified_at":"2026-10-21T01:15:32Z","board_verified":true,"closed_at":null,"days_open":35,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":34},"description":"Ambrosia Energy is on a mission to make solar + battery systems the fastest-to-deploy and most cost-effective energy source in the US and beyond. As global energy demand surges-driven by the rapid rise of data centers, electric vehicles, and future in-home robotics-the world stands at a critical energy inflection point. To meet this challenge, we need innovative, scalable power sources. Our engineering-led team, with expertise in designing and deploying satellite constellations (Swarm, Starlink Mobile), is now focused on energy on Earth. We're developing affordable, clean energy solutions with new battery storage systems. United by strong team camaraderie, we prioritize speed, rapid iteration, vertical integration, and a test-like-you-fly approach. We're committed to making an impact on the future of energy.\nWe are designing and developing a distributed battery storage system to pair with solar panels that are quick and easy to install. The system is simple, robust, reliable, and easy to manufacture at scale. The system will include highly efficient DC-DC conversion, solar MPPT, power distribution, no moving parts, and efficient cable management to make everything plug and play in the field.\nWe are seeking a skilled Firmware Engineer to develop embedded software for digitally controlled DC-DC, AC-DC, and bidirectional power converters used in our distributed battery storage system paired with solar generation. The ideal candidate will work closely with power electronics, systems, and test engineers to develop robust, efficient, and reliable firmware that supports high-performance power conversion and scalable product development.\nResponsibilities\nDevelop embedded firmware in C for DSP-based control of AC-DC, DC-DC, Dual Active Bridge (DAB), and LLC resonant power converters.\n\nImplement and tune real-time digital control loops, including PI, PID, PR, and other control strategies for power conversion.\n\nDevelop communication between processors, controllers, and system-level devices using serial and poll/response protocols.\n\nDevelop power point tracking, battery charging, micro-grid forming/following algorithms, and develop nested loop structures implemented in DSP + MCU + Processor.\n\nAdhere to coding standards and software engineering best practices including code maintenance in common code revision control system.\n\nAnalyze test results and present findings during technical design reviews to improve performance, robustness, and maintainability.\n\nWork closely with the power electronics team to bring up, debug, optimize, and validate converter hardware and controls.\n\nCreate and maintain clear documentation for firmware architecture, control implementation, interfaces, and test methods.\n\nQualifications\nBachelor's degree in electrical engineering, computer engineering, embedded systems, or other related STEM discipline.\n\n3+ years of professional experience developing embedded software, firmware, or digital controls for power electronics, motor drives, power supplies, or similar real-time systems (internship experience is applicable).\n\nStrong programming experience in C/C++.\n\nExperience developing embedded software using DSPs, microcontrollers, FPGAs, or similar real-time digital controllers.\n\nFamiliar with developing control algorithms (voltage control and current control loops, etc.) for AC-DC and DC-DC power conversion.\n\nExperience implementing and debugging real-time control systems involving PWM, ADC sampling, interrupts, timers, and hardware protection.\n\nHands-on experience debugging and validating embedded and electrical systems using oscilloscopes, logic analyzers, debuggers, and similar tools.\n\nPreferred Skills or Experience\nMinimum of 3 years of experience in building real-time embedded systems using object-oriented programming in C and C# language.\n\nHave experience with Freescale-NXP, STM32, Microchip or Texas Instruments Microcontrollers / DSP.\n\nFamiliarity with communication protocols (I2C, SPI, ModBus, CANbus).\n\nIn compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire. The company is unable to sponsor employment visas at this time.","description_format":"text","description_chars":4267,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-01T12:03:42Z"}],"visa":[],"liveness":{"score":26,"band":"fade","label":"Fading","p_open":1,"p_active":0.584,"p_room":0.45,"age_days":34,"expected_fill_days":22,"reasons":["conf:1","win:tail"],"computed_at":"2026-10-20T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/ambrosia-energy-embedded-firmware-engineer","json_url":"https://alion.io/job/ambrosia-energy-embedded-firmware-engineer.json","meta":{"generated_at":"2026-10-21T02:27:23Z","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":3648,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"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":3793713},"rest":"https://alion.io/mcp/rest/get_company?id=3793713"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fambrosia-energy-embedded-firmware-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%2Fambrosia-energy-embedded-firmware-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%2Fambrosia-energy-embedded-firmware-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/ambrosia-energy-embedded-firmware-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fambrosia-energy-embedded-firmware-engineer"}]}