{"id":2665661,"url":"https://alion.io/job/unit21-full-stack-engineer","title":"Full Stack Engineer","company":{"id":20953,"name":"Unit21","domain":"unit21.ai","url":"https://alion.io/company/unit21","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Zoho Recruit","truth_index":null},"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":160000,"max":200000,"currency":"USD","period":"year","gross":null,"usd_annual":200000},"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Material UI","optional":false},{"name":"Python","optional":false},{"name":"Rust","optional":false},{"name":"SQL","optional":false},{"name":"Terraform","optional":false},{"name":"Databricks","optional":true},{"name":"JavaScript","optional":true},{"name":"Model Context Protocol","optional":true},{"name":"RAG","optional":true},{"name":"React.js","optional":true},{"name":"Spark","optional":true}],"status":"live","first_seen_at":"2026-09-24T00:00:00Z","employer_posted_date":"2026-09-24","last_verified_at":"2026-10-17T11:05:07Z","board_verified":true,"closed_at":null,"days_open":23,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":23},"description":"About the role: We are looking for a full stack engineer who is passionate about catching fraud. We build AI products that help our customers detect fraud and keep their customers money safe. This requires careful thought, high creativity, and a deep understanding of complex systems. What you will be doing: Design and build high-performance automation and AI systems with intuitive user interfaces prioritizing scalability, reliability, and efficiency. Lead projects from start to completion Collaborate with product and design to refine user experiences Reviewing pull requests, internal and external to team Innovating on creative solutions to difficult problems Work with related data infrastructure technologies Building new features to help our customer detect ever changing complex fraud scheme Developing and deploying efficient and elegant code What we’re looking for: BS, MS or Ph.D in Computer Science, Engineering, Mathematics, Statistics, Physics, or related field is required. 3+ years of experience in Python/Go/Rust. 3+ years of experience with React and Material UI Experience in building and managing distributed systems. Experience with AWS and Terraform Experience in developing and optimizing end-to-end APIs, data-flows, SQL queries and infrastructure for consumer or enterprise products. Advanced knowledge of software engineering principles including software design, source control management, build processes, automated deployments, code reviews, testing methods. Hustle, curiosity, humility Bonus Points! Experience managing large-scale critical production systems with minimum SLAs of 4 9's Experience with Databricks or Apache Spark Experience with building and deploying RAG pipelines Experience with securing MCP Work Location: San Francisco - Bay Area Compensation: The standard base pay range for this role is $160,000 - $200,000 annually. This range does not include bonuses, equity, or other incentives.What\nWe Offer Competitive salary and pre-IPO equity 100% company-paid medical, dental, and vision insurance (employee) Unlimited PTO and generous leave programs 401(k), learning & development stipend, and home office setup support Inclusive, high-ownership culture focused on impact, innovation, and growth Equal Opportunity Unit21 is an equal opportunity employer. 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