Senior / Staff Backend & AI Engineer

Tofu

Tofu

Software Engineering, Data Science

San Francisco, CA, USA

Posted 6+ months ago

At Tofu (tofuhq.com), we’re building the future of B2B marketing with AI. Our platform helps companies create hyper-personalized, omni-channel content at scale — and we’re growing fast. Backed by Index Ventures, SignalFire, and HubSpot Ventures, we are post Series A and are scaling the team.

👉 See Product Demo: https://www.loom.com/share/4845885881264dea914a9978d57a238e

What you’ll do:

  • Build scalable backend systems with Python/AWS
  • Apply LLMs + modern AI frameworks (LangChain, LangGraph) to real-world problems
  • Design distributed systems for enterprise workloads
  • Optimize Postgres + REST APIs
  • Ship features daily, working directly with customers

What we’re looking for:

  • 3+ years of experience (mix of big tech + startup = ideal)
  • Strong in Python, AWS, scalable systems, databases, APIs
  • Experience with LLMs/AI frameworks
  • Product-minded engineer who loves end-to-end problem solving

Why join us?

  • High-impact role shaping the future of generative marketing tech
  • Talented, collaborative team in a fast-growing startup
  • Dog-friendly San Mateo office (3 days/week)
  • Daily product releases — ship fast, learn fast
  • 📩 Interested? Apply directly or reach out: honglei@tofuhq.com