Senior Backend Engineer

A fast-growing, Y Combinator-backed AI startup in the supply chain space is looking for a Senior Backend Engineer to join their small, high-velocity engineering team in San Francisco. You’ll build the backbone of an AI-powered platform that plans and executes how consumer goods are produced and moved globally - turning the messy, physical flow of goods into programmable, reliable, scalable systems.

This is an end-to-end ownership role at a seed-stage company (fewer than 10 people) operating at the intersection of AI, logistics, and Consumer Packaged Goods (CPG). You’ll have a direct and meaningful impact on the core product from day one., * Design and implement backend systems that power AI-driven supply chain decisions and automated execution.

• Architect data models and pipelines to ingest, clean, and organize messy, real-world supply chain data.
• Ensure user requests and supply chain plans are processed in real time for reliable, 24/7 operation.
• Build scalable, high-performance SQL queries and data access patterns across large datasets.
• Ship production-grade services using modern backend frameworks and rigorous testing practices.
• Collaborate closely with the core product and engineering team to translate logistics workflows into software.
• Own and continuously improve deployment pipelines and runbook processes to keep systems running reliably.
• Leverage AI code generation and management tools (e.g., Claude Code, Codex, OpenCode) to accelerate development, including parallelizing service instances for continuous operation.

Must-haves (dealbreakers):

• 5+ years of hands-on experience as a Backend Engineer with a strong track record of designing data architectures and shipping real products.
• Proficiency in Python and modern backend frameworks such as FastAPI, with testing tools like pytest.
• Demonstrated proficiency with AI-assisted coding tools (e.g., Claude Code, Codex, OpenCode), including experience parallelizing instances for autonomous, 24/7 operation., * Experience organizing and managing messy, real-world data at scale.
• Strong SQL skills - writing high-performance queries over millions of data points.
• Solid system design skills; comfortable designing scalable data architectures with minimal supervision.
• Experience owning backend systems end-to-end, including real-time request processing.
• Experience with large-scale data architectures and systems engineering.

Nice to have:

• Experience building unstructured data ingestion systems.
• Experience with frontend frameworks and their testing tools.
• Familiarity with DevOps practices and AWS.
• Background or genuine interest in supply chain, logistics, or CPG industries.

$110,000 - $200,000 a year - Full-time, * Salary: $110,000 - $200,000 USD annually, depending on experience.

• Early-stage equity in a well-funded, high-growth startup.
• Visa sponsorship available.