Senior Software Engineer - TypeScript

🚀 Senior TypeScript Engineer – London – AI Start-up

Location: London (Hybrid)

Compensation: Up to £150K

Atarus have partnered with a rapidly growing YC-backed AI start-up looking to hire a Senior TypeScript Engineer . This is an opportunity to join at the ground floor of a company that’s already secured a strong seed round, launched with enterprise clients, and has ambitious growth plans over the next year.

You’ll be joining a small, senior founding team who are redefining how AI-powered software is built — already gaining traction with customers ranging from Series A startups to global tech giants.

🔍 What You’ll Be Doing

• Building and shipping new product features end-to-end in TypeScript
• Owning parts of the frontend and backend architecture
• Collaborating closely with the founders on product and scaling decisions
• Helping shape the company’s engineering standards and culture

🛠️ Tech Stack

TypeScript | Next.js | React | Node.js | AWS | Python | FastAPI | LangChain

(You don’t need to know every tool — they’re looking for curious engineers who love to learn fast.)

💰 Compensation & Equity

There are no preset limits on salary or equity. If you’re top-tier, they’ll match it.

✅ What They’re Looking For

• 5+ years’ experience working with TypeScript (or impressive personal projects)
• Strong knowledge of React and modern web development practices
• Experience building scalable, high-performance web applications
• A genuine builder mindset — someone who loves experimenting and learning quickly
• Based in London (or able to work onsite when needed)

If you’re excited by the idea of joining an early-stage, YC-backed team with serious momentum — get in touch: 📩 jack@atarus.co.uk