Senior Site Reliability Engineer

About this role

By combining advanced technology with a global network of talented people, we make unusable data usable, driving real-world impact at scale. More than just a workplace, we’re a global community founded on strong relationships and the belief that meaningful work transforms lives. Our commitment to earning, learning, and serving fuels everything we do as we strive to connect one million people to meaningful work and build leaders worth following.Our CultureAt CloudFactory, we believe in building a workplace where everyone feels empowered, valued, and inspired to bring their authentic selves to work. We are:Mission-Driven: We focus on creating economic and social impact.People-Centric: We care deeply about our team’s growth, well-being, and sense of belonging.Innovative: We embrace change and find better ways to do things together.Globally Connected: We foster collaboration between diverse cultures and perspectives.If you’re passionate about innovation, collaboration, and making a real impact, we’d love to have you on board!Role SummaryAs a Site Reliability Engineer, you will play a key role in keeping all production systems running smoothly. You will work closely with other engineers and operators to fuse engineering principles, operational knowledge, security, and automation to work towards platform/service production excellence from an angle of infrastructure, reliability, and security. The SRE team owns the foundation of AI Platform’s Core platform - the services and infrastructure that let us deploy to a multitude of public cloud providers and that powers many ML and LLM powered features. We give every other engineering team a reliable base to build on, and we own the software delivery lifecycle end to end: the tooling, patterns, and automation that reduce friction for the whole org.This is an exciting opportunity to grow professionally while contributing to a mission-driven organization.Responsibilities:What you’ll ownReliability of platform(includes ML and LLM workloads) - model serving and inference infrastructure (GPU-backed endpoints, autoscaling, latency and cost tradeoffs), with SLOs, on-call, and incident response that cover models, not just servicesObservability(includes ML models) - drift and performance monitoring for ML, plus LLM-specific tracing, evals, and guardrails, wired into the same metrics and logging stacks we run everywhere elseCompany-wide technical direction: shaping the roadmap and building golden paths that raise the baseline for every teamDeveloper tooling and automation that compounds - reusable GitHub Actions, GitOps workflows, Terraform modules - so every engineer ships fasterReusable components packaging common open-source tools (Grafana, Istio, CloudNative stack, and ML tooling such as model registries and feature stores) for teams to deploy in any environmentSecure-by-default infrastructure - baking security, compliance audits, cost governance, and audit trails into the platform in close partnership with our lead/backend/staff engineers. Who you are (must-haves)5+ years in infrastructure engineering, DevOps, or SRE, operating large-scale, high-availability production systems using KubernetesProduction Operational experience - a live cluster under real load, not a lab. Fluent with Helm, and Terraform or Cloudformation, on at least one major cloud (AWS preferred).Good proficiency in Python or Go or general scripting for automation and tooling(automation with higher language preferred)AI is already in your daily loop - Agentic tooling (Claude Code, Codex, Droid, internal skills) is part of how you ship and not what you are experimenting with. We believe AI tools can be great with human judgement and we want the SRE team to bring the next wave day to day operations. First-principles reasoning - Reasoning from constraints and failure modes naming the tradeoff in business terms (reliability vs. velocity, cost vs. blast radius, standardisation vs. one-off) At least one infrastructure build you owned end to end - with the outcome metric attached (deploy time, MTTR, cost, adoption, availability).Cross-functional strength. Track record working with product, backend/frontend teams to pull through collective initiative. ML & AI platform (strongly preferred)Running ML workloads on Kubernetes - GPU scheduling, capacity, and cost managementModel serving and inference at production scale (eg KServe, RayServe, Triton, vLLM, or similar) with real latency and cost constraints(preferred RayServe)MLOps pipeline tooling - training pipelines, model registries, feature stores, and lineage (Kubeflow, MLflow, Feast, Weights & Biases, or equivalents)LLMOps in production - inference serving, prompt/version management, and LLM observability (tracing, evals, drift, guardrails, cost per request)Governing ML/LLM workloads as platform capabilities: data-residency and PII controls, and audit trailsAny other General requirementsGlobal Collaboration: Ability to work across global teams and different cultures across various time zones with strong communication skills.Problem Solving: Ability to break down complex problems into simple, actionable solutions.Ownership & Drive: Tendency to go above and beyond to meet deadlines, manage own deliverables, and assist team members.Availability: Willingness to support processes for 24x7 operational support. At CloudFactory, we believe that work should be more than just a job—it should be a platform for growth, impact, and community. Here, you’ll earn with purpose, learn every day, and serve a mission that truly matters. If you're looking for a career where you can develop professionally, contribute meaningfully, and be part of a global movement, we’d love to have you on this journey!Join us today and be part of our mission to connect people and technology for a better world! Apply now and bring your whole, authentic self to work—we can’t wait to meet you!

What this role is, and what else it is called

Employers in the UK advertise this kind of work as DevOps Engineer, Senior DevOps Engineer, Senior Platform Engineer and Platform Engineer too, so it is worth searching more than one wording. It is a senior DevOps, Platform & SRE role in the UK, advertised without a stated working pattern, which is worth asking about.

How this role compares to the market

25 live UK roles list SRE right now, across 20 source domains. 60% of 15 roles with a known arrangement are remote. Browse SRE roles.

Senior roles make up 806 of the live UK IT market and have a median annual salary midpoint of £61,250.

Market figures are today's snapshot of reportable live UK roles on public careers and vacancy pages; see hiring trends.

Technologies mentioned

Detected on Cloudfactory's careers page. ProdReady Recruitment lists this vacancy as an aggregator and is not the employer; applications go to the employer's own site.