Full-Stack Engineer

JOB DESCRIPTION:Velia Multiservices is partnering with an elite AI-forward startup to find a Senior Full-Stack Engineer (Backend-Leaning) to join their founding engineering team in San Francisco.This is not a maintenance role. This is a high-ownership opportunity for someone who wants to build core infrastructure, scale distributed systems, and help shape the future of AI-native products from the ground up.What You'll Do:Build and operate production-grade backend services and distributed systems on AWS or GCPArchitect scalable infrastructure with a focus on reliability, observability, security, and performanceDesign data systems using vector databases, OLAP, SQL, NoSQL, caching, and search technologiesOwn CI/CD pipelines, Terraform infrastructure, deployment systems, and production operationsImplement monitoring, logging, tracing, and alerting systems to maintain platform health at scaleBuild comprehensive testing frameworks that simulate deployment and runtime failure scenariosWork across the stack to ship complex features end-to-end in a fast execution environmentWho They're Looking For:2+ years of hands-on software engineering experience with a strong backend focusProven experience owning backend projects from concept to production independentlyFull-stack capabilities with the ability to move quickly across systems and infrastructureExperience working at a high-growth, VC-backed startup environmentStrong systems thinking with a deep understanding of scalability and reliabilityAI-native mindset — actively leveraging tools like Claude Code to dramatically improve development velocityBuilders with strong ownership mentality who thrive in ambiguity and move with urgency