Software Engineer, AI Agent Experience & Integrations

BranchFactor; North Salt Lake (UT); On-site; USD 160,000 - 210,000; Full time

Job summary

AssemblyAI is hiring to own and scale the agent experience for developers integrating our speech and AI APIs. You’ll design agent skills, prompts, MCP server integrations, and provide production-ready docs and samples. You’ll work with senior engineers from day one and shape how developers connect to our platform.

You’ll ship end-to-end agent capabilities, measure outcomes with evals, and influence product onboarding and tooling in a fast, meritocratic environment where ownership matters.

Qualifications

• 2+ years of professional software engineering experience.
• Proficient in JavaScript and/or Python.
• Hands-on experience with coding agents such as Claude Code, Cursor or Codex.
• Experience writing prompts, skills, tool definitions, or agent instructions.
• Product sense for developer-facing work.
• Strong technical writing and clear communication.
• Ability to ship autonomously in a fast-paced, ambiguous environment.

Responsibilities

• Own and drive the agent experience.
• Build and maintain agent skills for core products (Speech-to-Text, Real-time, Dictation, Voice Agents, TTS, LLM Gateway).
• Extend the MCP server and agent integrations; ship agent and MCP auth (OAuth and API keys).
• Make docs and code samples agent-ready; llms.txt, machine-readable docs, quickstarts and SDK examples.
• Tune prompts and instructions behind product and onboarding flows.
• Measure success with evals and benchmarks; track time to first working call and agent-driven signups.
• Help scale the playbook by starting with one product and expanding later.
• Use AI tools to accelerate engineering work.

Skills

JavaScript

Python

Full-stack development

Agent tooling

Tools

Claude Code

Cursor

Codex

Job description

AssemblyAI is hiring to own and scale the agent experience for developers integrating our speech and AI APIs. You’ll design agent skills, prompts, MCP server integrations, and provide production-ready docs and samples. You’ll work with senior engineers from day one and shape how developers connect to our platform.

You’ll ship end-to-end agent capabilities, measure outcomes with evals, and influence product onboarding and tooling in a fast, meritocratic environment where ownership matters.