Backend Engineer

Skip to hiring detailsSmall team. Real demand.Five people. A lot to build.Our customers are signing six- and seven-figure annual deals for ForwarderOS, our agentic operating system, and we have a queue waiting for paid pilots. We’re bringing on a few more engineers between now and our Series A, then continuing to grow the team from there.Our market spends roughly $50 billion a year on software and $500 billion on labor.

By building both software and AI agents, we can serve both sides of that opportunity.We’re hiring across:/ 01BackendBuild our core services in Python, FastAPI, and Temporal. We’re looking for an excellent Python engineer who can navigate complex integrations, rigorous requirements, and data modeling across Postgres, MongoDB, Redis, ClickHouse, and more./ 02Agent evaluationsBuild the evaluation and simulation systems that make AI agents measurably better.

You’ve worked on harnesses, synthetic datasets, failure analysis, and the iteration loop that turns an observed failure into a better product./ 03Data engineeringTurn messy, unfamiliar data into dependable pipelines and warehouses. You’ve built systems using dimensional modeling, slowly changing dimensions, star schemas, and Databricks, and you know how to choose and manage compute. This work goes well beyond writing SQL.

/ 04Frontend / mobileBuild the interfaces people rely on to move time-critical freight. Bring deep expertise in TypeScript + Next.js + React, Swift, or Kotlin. Strength across more than one of these is even better./ 05Infrastructure / reliabilityOwn the production infrastructure behind chrt. Build the observability, reliability, and operational practices that keep everything running well as the product and our customers’ operations grow.

/ 06Machine learningOwn the full path from dataset construction through training, evaluation, and deployment. You’ve trained models across different problems and have deep, hands-on ML experience that extends beyond using model APIs.What we valueShow us what you’ve built.We care much more about technical depth than years of experience. Early in your career? We’d love to hear from you if you:Are deeply curious about computers and engineeringSpend your time building thingsHave work you’re excited to show usComing nextThe work ahead.Some of what we’re planning to ship next:Text + voice AI agentQ4Per-customer HIPAA-compliant data lakesQ4Global customs portalQ4 / Q1Let’s build togetherSound like your kind of work?

We started chrt through Y Combinator’s Spring 2025 batch. We work together, in person, in San Clemente, California.Send us a note about yourself and a few things you’ve built. Projects, code, or a problem you went deep on are great places to start. If someone comes to mind, send them our way.hiring@chrt.com