Full Stack Engineer

Screen International Group ltd; Greater London; On-site; GBP 90,000 - 170,000; Full time

Job summary

Screen International Group ltd is seeking an experienced full-stack engineer with a strong AI-first mindset to shape product direction and ship features end-to-end in a fast-paced startup environment.

Ideal candidates have a portfolio of side projects and proven experience integrating with LLM APIs in production, with experience at top AI labs or leading tech companies.

Qualifications

• Must have an AI-first development mindset with ability to write the majority of code leveraging AI agents.
• Proven experience shipping 0-to-1 products in a fast-paced startup environment.
• A portfolio of impressive side projects or active personal repos.
• Demonstrated experience building products that integrate with LLM APIs (OpenAI, Anthropic) in production.
• Experience at a top AI lab (e.g., DeepMind) or a high-bar tech company (Google).

Responsibilities

• Own product features end-to-end with strong ownership mindset.

Skills

AI-first mindset

Ship 0-to-1 products

Portfolio of side projects

LLM API integration

Top AI lab experience

Job description

My client is redefining how enterprises manage risk in an AI‑driven world. As decisions and transactions shift to agents, traditional risk and trust workflows break; they’re slow, fragmented, and rebuilt from scratch every time. This team is replacing all of that with continuous, agent‑powered intelligence.

They’ve gone from launch to seven‑figure revenue in months, with multi‑year contracts across finance, regulated tech, and healthcare. They’re hiring founding‑team engineers who want to shape direction, ship fast, and earn meaningful pre‑Series A upside.

The Ideal Fit

Either a senior full‑stack engineer (6–7+ years’ experience) or an exceptional junior with clear raw talent who can own product features end‑to‑end.

The one absolute non‑negotiable is an AI‑first development mindset ( AI agents like Claude or Copilot to write the vast majority of your code).

Preferably a full-stack engineer with strong, well‑reasoned opinions on product and architecture, and deep expertise in TypeScript, React, and Node.js.

This is not just an employee hire; they are looking for an intellectual peer.

The benchmark they use is “someone like Andrej Karpathy”: a deep technical thinker with clear views on AI and product, who communicates well and genuinely wants to build.

The environment here is high‑energy, high‑ownership, and focused on shipping.

Required

• Experience at a top AI lab (e.g., DeepMind) or a high‑bar tech company (e.g., Google).
• A portfolio of impressive side projects, active personal repos, or even a failed startup.
• Proven experience shipping 0‑to‑1 products in a fast‑paced startup environment.
• Published research, conference talks, or recognition such as an Emergent Ventures grant.
• Demonstrated experience building products that integrate with LLM APIs (OpenAI, Anthropic) in production.
• A high degree of ownership and autonomy: an Engineer who thrives when given space to build.

Culture Fit

They put customers first, take full ownership, work hard with gratitude, and create a culture where bold, half‑formed ideas are welcomed because they spark the breakthroughs that matter.