{"id":750728,"url":"https://alion.io/job/sciforium-software-engineer-fullstack","title":"Software Engineer, Fullstack","company":{"id":716759,"name":"Sciforium","domain":"sciforium.ai","url":"https://alion.io/company/sciforium-2","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":85,"open_postings":5,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":11,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","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":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":165000,"max":210000,"currency":"USD","period":"year","gross":null,"usd_annual":210000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Multimodal AI","optional":false},{"name":"Python","optional":false},{"name":"Stripe","optional":false},{"name":"TypeScript","optional":false},{"name":"FastAPI","optional":true},{"name":"LLM","optional":true},{"name":"SGLang","optional":true},{"name":"vLLM","optional":true},{"name":"WebSockets","optional":true}],"status":"live","first_seen_at":"2026-08-07T01:35:50Z","employer_posted_date":"2026-08-07","last_verified_at":"2026-11-04T21:11:26Z","board_verified":true,"closed_at":null,"days_open":89,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":89},"description":"Sciforium is an AI infrastructure company developing next-generation multimodal AI models and a proprietary, high-efficiency serving platform. Backed by multi-million-dollar funding and direct sponsorship from AMD with hands-on support from AMD engineers the team is scaling rapidly to build the full stack powering frontier AI models and real-time applications.\nAbout the role\nThis role offers a unique opportunity to work on the core systems that power Sciforium’s multimodal AI models. You’ll help build the model serving platform working across C++, Python, runtime execution, and distributed infrastructure to create a fast, reliable engine for real-time AI applications.\nYou’ll gain hands-on experience with performance engineering, learn how large AI models are optimized and deployed at scale, and collaborate closely with ML researchers and experienced systems engineers. If you enjoy delighting customers with a great Developer Experience, care deeply about performance, and want exposure to the full AI stack, this role provides both high-impact work and strong growth potential.\nWhat you'll do\nInteractive AI Chat interface: Design and build a low-latency, chat-like interface for users to test our LLMs.\n\nDeveloper Console: Build the mission-critical UI where users generate API Keys, set budget limits, and view real-time usage graphs\n\nPayments & Billing: Integrate Stripe (or similar) to handle complex subscription models.\n\nDocumentation Portal: creating a dynamic API reference section\n\nCLI/SDK Integration: Write simple client-side wrappers to help users connect to our API endpoints easily.\n\nBackend APIs: Building secure API gateways and implementing low latency streaming solutions.\n\nIdeal candidate profile\nBachelor’s degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience)\n\n3+ years of software engineering experience, with a focus on front end development.\n\nStrong proficiency in Typescript, Python.\n\nUnderstanding of responsive design, and UX fundamentals\n\nStrong collaboration and communication skills, with the ability to work effectively across engineering and ML teams.\n\nComfortable working from the office and contributing to a fast-moving, high-ownership team culture.\n\nNice-to-have\nExperience with ML systems engineering, open source inference engine like vLLM, Sglang, or TRT-LLM\n\nStreaming Expertise: You understand the difference between WebSockets and Server-Sent Events (SSE) and know how to handle \"jittery\" network streams without freezing the UI.\n\nBilling integration: Experience integrating Stripe Elements, managing webhooks for payment success/failure, and handling \"SaaS\" logic (pro-rating, tiers).\n\nDocumentation Mindset: You appreciate good DX (Developer Experience). You know how to render an API spec into a readable web page.\n\nPython/Backend Knowledge: You can read a FastAPI or vLLM backend codebase to understand how data is being sent to you\n\nBenefits include\nMedical, dental, and vision insurance\n\n401k plan\n\nDaily lunch, snacks, and beverages\n\nFlexible time off\n\nCompetitive salary and equity\n\nEqual opportunity\nSciforium is an equal opportunity employer. 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