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).
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 DoAI 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), 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
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
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
On-site in San Francisco. This role is meant to be close to the founding team.
When ApplyingSend 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.
Skills Required
- 3-6 years of professional full-stack experience
- Comfortable building features across the entire stack
- Experience with Python, FastAPI, PostgreSQL, GCP, React, TypeScript, Tailwind CSS
What We Do
Reacher streamlines TikTok Shop influencer marketing by automating tedious tasks, eliminating the need to hire a VA or spend countless hours on influencer outreach and management.
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