{"id":10553,"url":"https://alion.io/job/fuse-energy-cuda-engineer","title":"CUDA Engineer","company":{"id":3017,"name":"Fuse Energy","domain":"fuseenergy.com","url":"https://alion.io/company/fuse-energy","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":97,"open_postings":36,"ghost_share":0,"stale_share":0.139,"repost_share":0,"time_to_fill_p50_days":42,"computed_at":"2026-10-17T05:46:00Z"}},"role":"AI/ML","role_family":"AI/ML","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":["US","GB"],"hiring_countries_total":2,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"CUDA","optional":false},{"name":"CUDA Toolkit","optional":false},{"name":"HPC","optional":false},{"name":"Sass","optional":false}],"status":"live","first_seen_at":"2026-07-19T00:00:00Z","employer_posted_date":"2026-07-19","last_verified_at":"2026-10-18T04:38:17Z","board_verified":true,"closed_at":null,"days_open":91,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":91},"description":"Fuse Energy is an energy startup on a mission to make energy abundant and affordable, fast. We combine first-principles thinking with cutting-edge technology to build a radically better energy system.\nWe've raised over $200M from top-tier investors including Balderton, Lakestar, Accel, Creandum, Lowercarbon, Ribbit, 20VC, Hummingbird and Collaborative Fund, alongside strategic angels including Nico Rosberg and GPs behind Meta, Revolut, Spotify and Uber.\nWe're building a fully integrated energy company: developing our own solar, batteries and other generation projects, building our own hardware, improving and developing grid infrastructure, trading power in real time, using AI across the business, and installing distributed energy in homes. By selling directly to consumers we cut out the middleman, lower costs and pass the savings on to our customers.\nAs data centres become one of the largest and fastest-growing sources of electricity demand, Fuse is expanding into high-performance compute infrastructure at the intersection of energy and AI. We're looking for a CUDA Engineer to write and optimise the low-level GPU code that powers our inference workloads: designing custom CUDA kernels, tuning performance across memory bandwidth and compute bottlenecks, and squeezing maximum throughput out of every GPU in our fleet, working at the level of SMs, warps and memory hierarchies.\nResponsibilities\nWrite and optimise custom CUDA kernels for core transformer inference operations\nProfile kernels to identify and eliminate bottlenecks in occupancy, memory throughput and warp divergence\nApply kernel fusion to reduce memory round-trips and launch overhead across inference pipelines\nOptimise memory access patterns and manage the memory hierarchy for maximum bandwidth utilisation\nImplement quantisation-aware kernels and mixed-precision arithmetic to reduce latency and memory footprint\nBuild and tune caching mechanisms for efficient autoregressive decoding\nTune kernel launch configurations for target GPU architectures\nBenchmark kernels against existing baselines and drive measurable throughput and latency improvements\nWrite tests for CUDA code to catch performance and correctness regressions\nMaintain internal CUDA libraries and contribute to team coding standards and documentation\nRequirements\n4+ years writing production CUDA code, with a track record of shipping performance-critical kernels\nDeep understanding of GPU microarchitecture: warps, occupancy, register pressure and memory hierarchy\nStrong CUDA C++ skills, including streams and asynchronous execution\nHands-on experience profiling to diagnose compute-bound vs memory-bound bottlenecks\nExperience with kernel fusion, memory coalescing and avoiding warp divergence\nExperience writing quantised and mixed-precision kernels\nSolid grasp of parallel algorithm design and numerical precision tradeoffs\nBonus: transformer/attention-style kernels or autoregressive decoding; building high-performance GPU libraries from scratch; HPC or latency-critical performance engineering; multi-GPU or multi-node kernel-level optimisation; comfortable reading PTX/SASS to validate kernel efficiency\nBenefits\nCompetitive salary and eligibility for equity\nBiannual bonus scheme\nFully expensed tech to match your needs\nPrivate health insurance\nBreakfast and dinner allowance for office-based employees\nAs we hire globally, benefits vary by location.","description_format":"text","description_chars":3412,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity","Health insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Solar Energy","Wind Energy"],"lifecycle":[{"event":"open","at":"2026-07-19T00:00:00Z"}],"visa":[],"liveness":{"score":19,"band":"cold","label":"Long shot","p_open":1,"p_active":0.664,"p_room":0.28,"age_days":90,"expected_fill_days":42,"reasons":["conf:3","velocity","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/fuse-energy-cuda-engineer","json_url":"https://alion.io/job/fuse-energy-cuda-engineer.json","meta":{"generated_at":"2026-10-18T05:39:38Z","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":8571,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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":3017},"rest":"https://alion.io/mcp/rest/get_company?id=3017"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ffuse-energy-cuda-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%2Ffuse-energy-cuda-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%2Ffuse-energy-cuda-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/fuse-energy-cuda-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ffuse-energy-cuda-engineer"}]}