Infrastructure Engineer in London

Requirements

• 5+ years of experience in infrastructure engineering, DevOps, or a similar role focused on building and operating large-scale, high-availability production systems at a high-growth product company.
• Experience running containerisation in production (a real cluster, not a lab), with experience in Helm and Terraform or Pulumi on at least one major cloud (AWS preferred), plus good proficiency in Python or Go for automation and tooling.
• AI is part of how you ship; you've built or adopted AI-assisted workflows others now use, and you have strong opinions on where it's unreliable. This is a hard requirement.
• Demonstrated ability to challenge the status quo, proactively identify systemic weaknesses, and propose innovative solutions to complex reliability problems.
• Make reversible calls by default — write the rollback before you touch production, work fluently with monitoring and logging stacks (Prometheus, Grafana, ELK or equivalent).
• Excellent communication, collaboration, and problem-solving skills, with a talent for building strong relationships and connecting with cross-functional teams.
• A strong sense of ownership and accountability, eager to own mission-critical systems and drive them toward peak performance and unparalleled reliability.
• (Desirable) A software-engineering background, not only config and scripting — you've designed, built, and shipped non-trivial production code in Python, Go, or a comparable language.

What the job involves

• At WRITER, our mission to expand human capacity with superintelligence relies on a foundational truth: our platform must be available, performant, and reliable, 24/7.
• As an Infrastructure engineer, you'll be at the heart of making this a reality, impacting every enterprise customer who trusts us with their AI-powered workflows.
• This isn't just about keeping the lights on; it's about pushing the boundaries of what's possible, proactively identifying and solving complex systemic challenges.
• You'll build resilient systems, automate across the stack, and champion reliability best practices, directly enabling our ambitious product roadmap.
• Bring deep focus to one problem at a time, with the breadth to move between SRE, DevOps, Infrastructure, and Platform work over a quarter or two as the leverage shifts.
• Challenge the status quo and remove toil before adding features — automate operational tasks and infrastructure management with Python or Go.
• Design scalable, fault-tolerant infrastructure across AWS (preferred), GCP, and Azure, working fluently across Kubernetes, Helm, Terraform, and the supporting cloud and AI tooling.
• Run agents in your daily loop to investigate incidents, draft Terraform / Helm changes, write runbooks, scaffold tooling, and review PRs.
• Lead incident response, post-mortems, and root-cause analyses — trace failures to the underlying problem and apply the learning back into the architecture.
• Own the reliability, performance, and efficiency of WRITER's core services end-to-end — define and uphold the SLOs and error budgets.
• Balance this week's critical work with the 6–12-month platform direction.
• Operate at the seams with product, security, and engineering peers — provide expert guidance on system design for reliability, performance, and scalability.