Software Engineer, Core Infra (Head of Service) at VC-backed enterprise AI startup

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. Job Title Software Engineer, Core Infra (Head of Service) Salary Not Disclosed Company Description VC-backed enterprise AI startup Job Description Lead the technical direction of critical core infrastructure for a platform building data layers for enterprise AI agents. This hands-on role focuses on the design, reliability, and operation of high-impact production systems. You will own complex technical outcomes while mentoring a high-performing engineering team in a collaborative on-site London environment. Location London, UK Why this role is remarkable Take end-to-end ownership of critical production systems that serve as the backbone for next-generation enterprise AI agents.Join a well-funded startup backed by top-tier VCs at a pivotal stage of infrastructure development and large-scale technical growth.Execute a high-impact technical lead role that prioritizes deep system expertise and architectural influence over traditional people management. What You Will Do Lead the design, delivery, and reliability of core backend services and platform systems to ensure durable infrastructure outcomes.Stay hands-on with production systems, making critical technical decisions that affect the scalability and performance of the service layer.Provide technical direction and mentorship across teams, fostering a culture of engineering excellence and operational stability. The ideal candidate Proven experience building and running large-scale backend services, platform systems, or SRE capabilities in a fast-paced environment.Strong technical leadership skills with a track record of owning complex problems and delivering high-quality, reliable infrastructure.Comfortable working on-site in London and collaborating closely with a tight-knit engineering team to solve foundational technical challenges. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. How does this work? Jack's an AI agent for job searching and career coaching. He works for you.Jill is the AI recruiter working for the company. She recruits from Jack's network.If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.