Lead Software Engineer | High Growth Scale Up

You could join one of London's fastest-growing AI scale-ups as they enter the next stage of growth following a major funding round.

Already trusted by over 1,200 customers, they're now building the next generation of their platform around agentic AI, creating intelligent systems that can reason, coordinate, and automate complex workflows. They're looking for a Lead Software Engineer to drive the technical direction of that platform.

This is a hands-on individual contributor role for someone who enjoys solving difficult engineering problems, shaping architecture, and raising the technical bar across an exceptional engineering team.

You'll take ownership of architecture and technical design across a modern distributed platform, helping shape how AI systems are built and deployed at scale.

Working closely with senior engineers and leadership, you'll lead the design of resilient backend systems, drive key technical decisions, and build the foundations of an agentic AI platform using modern LLM infrastructure and workflow orchestration.

There is also a clear pathway into engineering management for anyone who wants to move into leadership as the team continues to grow.

• Lead architecture and system design across a distributed platform.
• Build scalable backend services using Type Script and Node.js.
• Design reliable, high-performance systems that operate under scale.
• Help build an agentic AI platform using modern LLM technologies.
• Drive engineering standards through design reviews and code reviews.
• Work closely with product and engineering leadership on technical strategy.
• Mentor engineers and help shape engineering best practices.

• Significant commercial software engineering experience with technical leadership responsibilities.
• Excellent system design and architecture skills.
• Strong backend development experience with Type Script/Node.js or similar technologies.
• Experience building distributed systems and scalable platforms.
• Exposure to AI, LLMs, agentic systems, or modern AI infrastructure is highly desirable.
• Strong communication skills with the ability to influence technical direction.

• Agentic AI or LLM platform experience.
• Workflow orchestration tools such as Temporal or AWS Step Functions.
• GraphQL, PostgreSQL and GCP.

• Shape the architecture of a next-generation AI platform.
• Recently raised a major funding round and entering an exciting period of growth.
• Meaningful equity alongside a highly competitive salary.
• Work with an exceptional engineering team that values technical excellence.
• High-impact role with significant ownership and influence.
• Hybrid working – 2 days per week in the London office.
• Clear progression into engineering leadership if desired.

If you're passionate about system design, distributed systems, and building AI-powered platforms at scale, this is an opportunity to make a significant technical impact while working alongside some of the industry's best engineers.