Senior Backend Engineer (AI Agent)
US - GA - Atlanta OfficeAll locationsUS - GA - Atlanta OfficeAustin, TX Hybrid
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About the role
At Commerce, our mission is to empower businesses to innovate, grow, and thrive with our open, AI-driven commerce ecosystem. As the parent company of BigCommerce , Feedonomics , and Makeswift , we connect the tools and systems that power growth, enabling businesses to unlock the full potential of their data, deliver seamless and personalized experiences across every channel, and adapt swiftly to an ever-changing market. We believe in harnessing AI responsibly to unlock new possibilities, and we’re looking for individuals who use it intentionally to solve problems, accelerate outcomes, and expand what’s possible in their role. Our purpose is to help businesses confidently solve complex commerce challenges so they can build smarter, adapt faster, and grow on their own terms. If you want to be part of a team of bold builders, sharp thinkers, and technical trailblazers who shape the future of commerce, this is the place for you. As a Senior Backend Engineer specializing in AI agents, you will design the agents themselves: orchestration, sub-agent architecture, tool integration, prompt engineering, and — critically — the evaluation discipline that determines whether these agents are trustworthy enough to ship.
What you'll bring
- 5+ years of experience in backend or full-stack software development, with hands-on experience building agentic AI/LLM applications
- Strong and proven development skills in any major language (Go/Python/Ruby/PHP)
- Experience working with LLMs (Gemini, Anthropic, OpenAI, etc.) in production systems
- Experience with LLM evaluation: building datasets, defining scorers/metrics, and using eval results to drive iteration
- Strong understanding of prompt engineering, tool/function calling, and agent orchestration patterns
- Deep experience designing and building APIs (gRPC, GraphQL, REST) and integrating data across systems
- Hands-on experience building MCP servers or LLM tool integrations
- Excellent problem-solving skills and ability to work in a fast-paced, exploratory environment
- Strong collaboration and communication skills in cross-functional teams
- Strong preference toward execution and delivery
- Education: Preferred minimum Bachelor's degree in CS, EE, SW, CE, MIS; or equivalent experience
- Experience with agent frameworks (Google ADK, LangChain/LangGraph, Semantic Kernel, or similar)