{"id":36064,"url":"https://alion.io/job/lightfield-software-engineer-infrastructure-staff","title":"Staff Software Engineer, Infrastructure","company":{"id":8339,"name":"Lightfield","domain":"lightfield.com","url":"https://alion.io/company/lightfield","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":75,"open_postings":5,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":48,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","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","Cambridge, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":220000,"max":300000,"currency":"USD","period":"year","gross":null,"usd_annual":300000},"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Llama","optional":false},{"name":"PostgreSQL","optional":false},{"name":"World Models","optional":false},{"name":"GraphQL","optional":true},{"name":"JavaScript","optional":true},{"name":"Next.js","optional":true},{"name":"Node JS","optional":true},{"name":"React.js","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2025-01-23T17:38:23Z","employer_posted_date":"2025-01-23","last_verified_at":"2026-10-17T20:02:05Z","board_verified":true,"closed_at":null,"days_open":632,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":631},"description":"About Lightfield\nLightfield is reimagining CRM as a world model of a business. By learning from emails, meetings, and customer conversations, we’re building a living understanding of how a company works-so AI can help teams anticipate what comes next, make better decisions, and take action.\nMore than 5,000 companies have used the product since its November launch. We’ve raised more than $70M from Andreessen Horowitz, Coatue, Maverick Ventures, and Greylock to attack the biggest software category in the world. We previously built Tome, which reached more than 25 million users, and our team brings experience from Llama, Instagram, Google, and Salesforce.\nAbout the role\nWe’re looking for an experienced, creative, and versatile engineer who is eager to tackle the challenge of architecting, building, and scaling the core infrastructure and systems powering Lightfield's AI-driven CRM.\nAt Lightfield, engineers take ownership of projects from inception to impact, collaborating across functions and pushing the envelope on what’s possible in applied AI and data systems. You’ll play a critical role in designing and building the data models and infrastructure that support a next-generation CRM, ensuring our system is performant, scalable, and resilient.\nWhat you’ll do\nBuild and maintain full-stack systems, end-to-end, ensuring reliability, scalability, and performance.\n\nArchitect and scale the data infrastructure and backend services that power Lightfield AI-driven CRM.\n\nDesign and optimize data models to support CRM workflows, customer interactions, and AI-driven insights.\n\nDevelop observability and metrics to enable smooth operation, proactive issue detection, and continuous improvement.\n\nMentor teammates, participate in code reviews, and help shape engineering culture and practices.\n\nContribute to building a world-class engineering team through recruiting, mentorship, and knowledge-sharing.\n\nWho you are\n7+ years of experience in software development, with a strong background in infrastructure, data modeling, and backend systems.\n\nDeep experience building scalable, high-performance data infrastructure that can support complex customer workflows and large-scale data processing.\n\nStrong understanding of database design, indexing strategies, and query optimization, especially in PostgreSQL or similar relational databases.\n\nYou’re excited about Large Language Models (LLMs) and the opportunity to build systems that support and leverage them.\n\nYou have the ability to ramp quickly on tech stack that features TypeScript, React, Next.js, Node.js, Apollo GraphQL, and PostgreSQL.\n\nStrong fundamentals in software engineering, with a degree in Computer Science or a related field.\n\nThrives in ambiguity, able to independently drive projects and deliver results in a fast-moving environment.\n\nClear communicator, capable of articulating technical decisions to both technical and non-technical stakeholders.\n\nPassionate about building products customers love, ensuring our CRM is intuitive, intelligent, and 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