Software Engineer

SOFTWARE ENGINEER, AI AGENTS ABOUT REACHER We're the #1 TikTok Shop partner helping brands like Under Armour, Hanes, HeyDude, and Logitech scale their affiliate marketing. We've crossed 7 figures in ARR and are backed byY Combinator, Pioneer Fund, Rebel Fund, and operators including Steve Huffman (CEO of Reddit), Matteo Franceschetti (CEO of Eight Sleep), Theo Browne (t3.gg http://t3.gg). We're making a big bet on AI agents and what they can do for creator marketing. This role sits at the center of that. WHAT YOU'LL DO AI Agents - Build and own long-running AI agents that automate complex, multi-step workflows for TikTok Shop brands. - Design agentic systems end-to-end: orchestration, state management, error recovery, and observability. Backend & Infrastructure - Own the backend systems your agents run on — design, implement, ship, maintain. Python, FastAPI, PostgreSQL, GCP. - Contribute to our jobs infrastructure (GKE-based, on-demand workers) as needed to support agent reliability and scale. - Set the bar for code quality and architecture decisions across the backend. You're a Fit If - 3+ years of backend engineering experience, ideally at a product-first company - You've built automation, agents, or complex async systems — and you think deeply about failure modes - Strong systems thinking, but applied toward agent reliability and workflow design, not just raw infra - Comfortable with ambiguity and own problems end-to-end without hand-holding - You've worked directly with customers or product teams and can translate vague requirements into technical decisions - Resourceful: you figure things out, you don't wait for the answer to show up Technical Skills We Value AI and Agentic Development: - AI agent frameworks and LLM orchestration for building and managing long-running, multi-step agents - Claude Code proficiency: context engineering (CLAUDE.md http://CLAUDE.md), custom commands, MCP integrations, subagent coordination - Strong judgment for when to leverage AI vs. when to code directly - Ability to decompose complex engineering work into tasks suitable for AI assistance - Experience verifying AI-generated code for correctness, security, and maintainability Backend: - Python, FastAPI, PostgreSQL - System design with a focus on async, long-running, stateful workflows - GCP/cloud infrastructure (GKE/KEDA) — enough to own what your agents need - API design (REST/GraphQL) General: - Testing frameworks (Playwright, Pytest) — especially for validating agent behavior end-to-end - Code reviews, documentation, and establishing conventions BONUS POINTS - You've been an early engineering hire at a startup - You've built or maintained internal automation systems that ran at scale - You've worked on AI agents, LLM pipelines, or autonomous systems - You've shipped side projects or contributed to open source - You're curious about e-commerce, creator marketing, or what AI will do to the agency business WHY JOIN - Small team (5 engineers), high ownership — you're working on the hardest problems, not feature tickets - You'll work closely with the founders in SF on the longest-term bets in the company - Real equity, we care about it as much as salary LOCATION On-site in San Francisco. This role is meant to be close to the founding team. WHEN APPLYING Send a short note about something you've built and why this role excites you. GitHub, LinkedIn, resume all welcome, but I care more about how you think and what you've shipped.