Full Stack Engineer

5 days ago

San Francisco, California, United States Optimal Full time £170,000 - £200,000 per year

Fullstack Engineer (Python & React) - AI Startup | San Francisco (On-site) |
Build Fast. Ship Faster.

Package:
£170K - £200K + Equity

Tech Stack
They build with
Python and React
, running on AWS, GCP, and Azure. Docker and scalable systems are a must. LLMs and LangChain aren't optional - they're core to everything they do.
(Required)

Education:
CS or technical degree from top program
(Required)


Please only apply if you are a
proven Full‑Stack Engineer with hands‑on expertise in LLMs, LangChain, Retrieval‑Augmented Generation (RAG), and scalable infrastructure.


Ideal candidates have built and shipped at a leading startup or quant‑driven company, where speed, scale, and precision are non‑negotiable.

This role is for full‑time professionals - not interns - ideally with experience at a well‑known startup.

Let's be honest - this role isn't for everyone. It's intense. It's fast. It's But if you thrive in high-pressure, high-reward environments, this is where you'll do the most meaningful work of your career.

It's exactly the kind of environment I love - high velocity, full ownership, and zero fluff. If you move fast and build faster,

Optimal have partnered with a stealth-mode AI startup that's scaling hard and hiring 10+ engineers right now. Backed by serious capital and already generating real revenue, they're rebuilding a broken industry from the ground up using cutting-edge AI.

You'll be part of a small, elite team solving real-world problems with multimodal tech. Expect ownership from day one, direct customer impact, and a culture that rewards speed, clarity, and execution.

What You'll Be Doing

  • Deploy to production on day one - no red tape
  • Own features end-to-end: infra, backend, customer delivery
  • Build with LLMs, LangChain, RAG, and scalable infra
  • Work directly with users to iterate and deliver fast

What They're Looking For

  • 2+ years at a top-tier tech start up company or quant firm
  • Strong backend skills (Python, APIs, infra)
  • Bonus: React, Docker, cloud-native systems
  • High-velocity mindset - comfortable in a 9-9-6 culture
  • Clear signals of technical excellence (competitions, research, elite schools)
  • This is a role for builders. If you want to move fast, own outcomes, and work with some of the sharpest minds in AI - this is your shot.

Ready to build at the edge of what's possible?
This is your moment. No fluff, no filler - just raw engineering, real ownership, and the chance to shape the future of AI from the inside out. If you're wired for speed, thrive under pressure, and want your code to drive actual impact from day one, then get in. The team is forming now - and they're not waiting around.

Apply now. Build fast. Own everything.

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