Full Stack Engineer (Serverless)

fal is building the fastest and most scalable infrastructure for AI inference. Fal Serverless powers 1,300+ endpoints on the fal Marketplace and handles tens of millions of requests per day across production workloads.Enterprises use fal Serverless to deploy, operate, and scale custom AI models without managing infrastructure themselves. Autoscaling, observability, and operational complexity are handled end-to-end by fal's platform and UI.Serverless began as internal infrastructure built to support fal's own scale and was released publicly to enterprise customers in early 2025. It is now a core, revenue-driving product with rapidly growing adoption.fal is one of the fastest-growing AI startups, reaching Series D at a $4.5B valuation with a lean team of ~70 employees. You'll be joining early, with meaningful ownership and direct impact on a foundational product.About this role:As a Full Stack Engineer on Serverless, you will build the core product across frontend and backend that powers fal's Serverless platform. This is a deeply product-focused role. You will work side-by-side with Product and Infrastructure to design and ship reusable, scalable systems that enterprise customers rely on in production every day.You will be a foundational technical owner of fal Serverless as it scales to thousands of enterprise customers, with real responsibility, autonomy, and impact. This is a chance to help build a new product vertical from the ground up inside a company that is already scaling at rocket-ship speed.What you'll work on:Build and maintain core Serverless UI features (dashboards, logs, observability, configuration, usage)Design and implement backend APIs that power the Serverless product experienceImprove performance, reliability, and scalability of customer-facing systemsWork closely with Infrastructure to ensure product features align with platform capabilitiesOwn features end-to-end, from design through production and iterationWhat we're looking for:Strong experience working across both frontend and backendProficiency with TypeScript, Python, Postgres, and Next.jsExperience owning features end-to-end in production systemsAbility to context switch between UI, backend, and performance workProduct-minded engineer who values clean abstractions and long-term maintainabilityComfortable working in a fast-moving, low-process environmentNice to have:Experience building developer platforms or infrastructure-adjacent productsFamiliarity with observability tooling (logging, metrics, tracing) in production environmentsBackground in distributed systems, container orchestration, or cloud-native architecturesExperience with real-time systems, streaming logs, or high-throughput data pipelinesExposure to technologies such as Kubernetes, Prometheus, Datadog, gRPC, or similar systemsEntrepreneurial mindset and strong ownership mentalityWhat we offer at fal:Interesting and challenging workCompetitive salary and equityA lot of learning and growth opportunitiesWe offer visa sponsorship and will help you relocate to San Francisco.Health, dental, and vision insurance (US)Regular team events and offsiteCompensation:$150,000 - $230,000 + equity + comprehensive benefits packageLocation:We are currently hiring in downtown San Francisco.