{"id":1310645,"url":"https://alion.io/job/ubitium-senior-software-engineer-processor-software-stack","title":"Senior Software Engineer (Processor Software Stack)","company":{"id":2331383,"name":"Ubitium","domain":"ubitium.com","url":"https://alion.io/company/ubitium","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Join","truth_index":null},"role":"Backend","role_family":"Backend","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":["Karlsruhe, Germany"],"countries":["DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":74000,"max_usd":135000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":55},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"AI Agents","optional":false},{"name":"C++","optional":false},{"name":"Python","optional":false},{"name":"STL","optional":false},{"name":"CUDA","optional":true},{"name":"CUDA Toolkit","optional":true},{"name":"Linux","optional":true},{"name":"LLVM","optional":true},{"name":"OpenCL","optional":true},{"name":"QEMU","optional":true},{"name":"Verilator","optional":true},{"name":"Verilog","optional":true}],"status":"live","first_seen_at":"2026-09-17T15:28:02Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-09-26T15:51:36Z","board_verified":true,"closed_at":null,"days_open":9,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":9},"description":"At Ubitium, we believe the best engineering happens when people with different perspectives tackle hard problems together. We welcome applicants from all backgrounds and experiences. What matters most is curiosity, skill, and the drive to build technology that improves the world. If that resonates with you, we’d love to hear from you. Our team members come from some of the best universities in the world and left some of the largest tech companies to build something truly remarkable.\nTasks\nWe are looking for a Senior Software Engineer who is at home across our processor software from ported libraries and the compiler down to bare-metal and operating systems. Your team will: develop our software stack, including compiler, mapping tools, low-level tooling, simulation and debug infrastructure; write bare-metal, firmware and OS-level software for our RISC-V SoC; implement and optimise signal-processing and inference kernels under real-time constraints; bring up, test and port software on pre-silicon platforms and on silicon, including low-level hardware tests; and work in a close feedback loop with our hardware designers.\nRequirements\nStrong C, modern C++ (C++17/20, STL, Boost) and Python.\nA solid foundation in algorithms and in hardware/software system architecture.\nExperience working close to the hardware, with a good understanding of system-on-a-chip design, processor architecture and microarchitecture, and some familiarity with RTL and hardware design.\nExperience with agentic programming.\nYou know your way around all of these fields, and go deep in at least one: i ) compiler development and code generation; ii) low-level tooling, simulation and performance analysis; iii) low-level embedded or systems software, operating systems and real-time; iv) signal processing, numerical computation and ML inference\nMaster's degree (or equivalent experience) and 10+ years of relevant experience.\nRelocation required. Currently 4 days on-site, 1 day remote. Policy may change.\nNice to have\nParallel and data-flow execution models: SIMT, predicated execution, branch divergence.\nMapping and optimisation algorithms: graph algorithms, place-and-route / EDA, CGRA or FPGA mapping, ILP solvers.\nKernel-level optimisation: vectorisation, data layout, memory hierarchy, fixed-point and quantised arithmetic.\nPost-silicon validation and hardware bring-up, including directed and random test generation.\nPorting code to new platforms.\nExposure to: RISC-V, LLVM, CUDA, OpenCL, Verilog, Verilator, QEMU, GDB, JTAG and on-chip debug, OpenSBI, bootloaders, HAL, Linux kernel and device drivers, device tree, Zephyr, Yocto/OpenEmbedded, BLAS/LAPACK/OpenBLAS.\nBenefits\nCompetitive salary plus stock options\n30+ days of paid vacation\nRelocation support\nFull German social security and universal healthcare\nA modern office\n Free snacks, coffee, and drinks\nWork with people who actually know their stuff - computer architects, hardware nerds, and engineers who love tough problems.\nA culture where new ideas matter, but so does respect and collaboration.\nSpace to grow: pick up new skills, dig into areas that interest you, and shape your own path.\nGet hands-on with real implementations of AI and signal processing - not just slides or buzzwords.\nAn inclusive team where different perspectives are valued and everyone contributes.\nWe are constantly looking for talent. We recruit through multiple channels - friends & colleagues, universities and professors we know, recruiters, conventions, e-mails and LinkedIn. Join us today.","description_format":"text","description_chars":3530,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Stock options"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":true,"industries":[],"lifecycle":[{"event":"open","at":"2026-09-26T15:51:36Z"}],"liveness":{"score":82,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.822,"p_room":1,"age_days":9,"expected_fill_days":42,"reasons":["conf:11","win:early"],"computed_at":"2026-09-27T03:44:59Z"},"pay":null,"html_url":"https://alion.io/job/ubitium-senior-software-engineer-processor-software-stack","json_url":"https://alion.io/job/ubitium-senior-software-engineer-processor-software-stack.json","meta":{"generated_at":"2026-09-27T03:44:59Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3493,"day_limit":5000,"remaining_today":1507,"minute_limit":60,"resets_at":"2026-09-28T00:00:00Z"}}}