Senior Backend Engineer (AI Agent)
BigCommerce23 hours ago
Base Salary
$116k - $195k/yr
Responsibilities
- Design, build, and iterate on AI agents in Go and Python using orchestrator/sub-agent architectures.
- Own evaluation-driven development, including golden datasets, scorers, regression suites, and metrics for agent quality.
- Develop and maintain prompts and model configurations as versioned, tested artifacts.
- Integrate agents with MCP servers and backend tools, including safe tool-call contracts, approval flows, and abuse guardrails.
- Instrument agents with tracing, metrics, and cost tracking and use production signals to improve quality.
- Collaborate with product designers and frontend engineers on conversational user experiences.
- Build proof-of-concept agents and harden them to general-availability quality.
- Drive architecture decisions and mentor other engineers in agent engineering practices.
Requirements
- At least 5 years of backend or full-stack software development experience with hands-on experience building agentic AI or LLM applications.
- A preferred minimum bachelor's degree in computer science, electrical engineering, software engineering, computer engineering, or MIS, or equivalent experience.
- Strong development skills in a major programming language such as Go, Python, Ruby, or PHP.
- Production experience with LLMs such as Gemini, Anthropic, or OpenAI.
- Experience building LLM evaluation datasets, defining scorers and metrics, and using evaluation results to guide iteration.
- Strong understanding of prompt engineering, tool or function calling, and agent orchestration patterns.
- Deep experience designing and building APIs with gRPC, GraphQL, or REST and integrating data across systems.
- Hands-on experience building MCP servers or LLM tool integrations.
- Strong problem-solving, collaboration, communication, execution, and delivery skills.
- Preferred experience with Google ADK, LangChain, LangGraph, Semantic Kernel, Braintrust, LangSmith, RAG systems, e-commerce or SaaS products, conversational AI, or natural language processing.
Benefits
- Remote-first work arrangement.
- Optional collaborative workspaces in Austin, Atlanta, and London for gatherings, workshops, and in-person collaboration.
- Potential eligibility for variable compensation, equity, and benefits in accordance with local policies.
- Inclusive and accessible hiring experience with accommodations available upon request.
Categories
About BigCommerce
BigCommerce, powered by Commerce (Nasdaq: CMRC), is the flexible enterprise ecommerce platform built for growth without compromise. Our open architecture makes it easy for brands and B2B sellers to scale, adapt, and connect to the tools that solve their unique business challenges — without being locked into rigid systems. Learn more at bigcommerce.com If you are interested in exploring career opportunities with us, we invite you to follow the Commerce LinkedIn Jobs page for the latest updates on open positions. #BigCommerce #PoweredByCommerce