Software Engineer

Staff Software Engineer / Python / TypeScript / LLMs / AI Agents / Cloud

Staff Software Engineer

Location: London (Old Street, 5 days onsite)

Job Title: Staff Software Engineer

About the role:

We're on the lookout for an exceptional Staff Software Engineer to join one of London's fastest-growing AI startups building autonomous AI voice agents that are redefining how businesses interact with their customers.

This is a unique opportunity to build production AI systems powered by the latest Large Language Models, designing intelligent agents capable of handling complex customer conversations, reasoning through problems, and autonomously completing real-world tasks. You'll work at the cutting edge of applied AI, helping shape products where LLMs aren't simply an added feature—they're the core of the user experience.

As a senior member of the engineering team, you'll own products end-to‑end, partnering directly with customers to understand their workflows before designing and shipping AI-native solutions that solve genuine operational challenges. You'll be building highly reliable, scalable systems that combine LLMs, voice technologies, event-driven architectures and cloud infrastructure to create seamless, autonomous customer experiences.

Joining at this stage means becoming one of the senior technical leaders in a well-funded, high-growth startup. You'll have significant ownership over technical direction, influence product strategy alongside the founders, and help define engineering best practices as the company scales.

Staff Software Engineer / Python / TypeScript / LLMs / AI Agents / Cloud

What we need from you:

• Design, build and ship production AI applications using Python, TypeScript and modern cloud infrastructure.
• Build intelligent AI agents powered by Large Language Models, integrating prompting, tool use, retrieval, structured outputs and agentic workflows into production systems.
• Develop scalable backend services and event-driven architectures that power real-time AI and voice experiences.
• Own projects from customer discovery through implementation, deployment and continuous iteration.
• Build integrations with third-party APIs, customer CRMs and external platforms to enable autonomous workflows.
• Know when to rapidly prototype AI capabilities and when to invest in long-term scalability, reliability and performance.
• Champion engineering excellence through testing, observability, security, documentation and best practices.
• Collaborate closely with founders, customers and product teams to shape the future of AI-powered software and deliver exceptional user experiences.

Staff Software Engineer / Python / TypeScript / LLMs / AI Agents / Cloud