Hiring guide
How to Hire a Platform Engineer: A Practical Guide
Platform engineering has become one of the most misunderstood job titles in UK tech hiring. Founders often write a job spec for a “platform engineer” and end up interviewing a mix of backend engineers, DevOps specialists and infrastructure generalists, none of whom quite fit. This guide explains what the role actually covers, how to screen for it properly, and what to expect on pay.
What a platform engineer actually does
A platform engineer builds the internal tools, pipelines and infrastructure that let other engineers ship software reliably and without friction. Their “customers” are internal: product and backend teams. Typical responsibilities include:
- Designing and maintaining internal developer platforms (IDPs)
- Building CI/CD pipelines, golden paths and self-service infrastructure
- Owning cloud architecture, cost control and reliability standards
- Reducing cognitive load for product engineers so they can focus on features
This is distinct from, though closely related to, DevOps and backend engineering. Understanding the difference is the first step in writing a job spec that attracts the right candidates.
Platform vs backend vs DevOps
Backend engineers build the application logic and services that power your product. They care about business logic, APIs and data models. See our guide to software engineering recruitment for more on hiring across the backend spectrum.
DevOps engineers focus on the culture and practices connecting development and operations: automation, monitoring, deployment pipelines. Many DevOps hires work embedded within product teams. Our DevOps engineer hiring guide covers this in more detail.
Platform engineers sit a layer above both. Instead of solving one team’s deployment problem, they build reusable, self-service systems so every team can solve it themselves. In a smaller company, one person may do all three. As you scale past twenty or thirty engineers, the roles typically separate.
If your bottleneck is data infrastructure specifically, rather than the wider platform, it may be worth comparing against our data engineer hiring guide before finalising the spec.
Screening a platform engineer properly
Most hiring mistakes happen at the screening stage, not the interview stage. A strong process includes:
- A systems design conversation based on your actual stack, not a generic whiteboard exercise. Ask how they would reduce deployment friction for a team of your current size.
- A reliability and incident scenario. Platform engineers are judged on how systems behave under failure. Ask about a real production incident they handled and what changed afterwards.
- A tooling and trade-off discussion. Good platform engineers can explain why they chose (or rejected) a given tool, not just list technologies on a CV.
- A collaboration check. Since their users are internal engineers, ask how they gather feedback and drive adoption of a new tool or process.
At OpenSource, every candidate is technically screened by the founders before a client meets them, so this stage is done for you rather than left to a generic recruiter checklist.
What to pay a platform engineer
Pay depends heavily on seniority, sector and location. Platform roles in fintech and AI-driven companies, for example, tend to command a premium given the reliability and compliance demands involved, see our fintech and AI and data industry pages for context. London-based roles also carry their own market dynamics, covered in our London hiring guide.
Rather than guess, use our salary benchmarks and the UK Tech Salary Report 2026 for current, numeric guidance broken down by level and location.
How we help
If you are not sure whether you need a platform engineer, a DevOps hire, or a senior backend engineer, that is exactly the kind of question we help founders work through before a search even starts. Every candidate we put forward has already been technically screened by our founders, so you only meet people who genuinely fit the role. Explore our recruitment services, including contingent recruitment, retained search and embedded RPO, or get in touch to talk through your next platform hire.
FAQ
Frequently asked questions
Is a platform engineer the same as a DevOps engineer?
No. DevOps is a set of practices for connecting development and operations. Platform engineering is a discipline that builds internal tools and self-service systems so other engineers can adopt those practices without needing deep infrastructure knowledge. Many people carry both titles, but the day-to-day work differs.
What should I test in a platform engineering interview?
Focus on how a candidate designs systems for other engineers to use, how they think about reliability and cost, and how they handle a live incident. Avoid pure trivia questions and instead use realistic scenarios based on your own stack.
How much does a platform engineer cost to hire in the UK?
Pay varies by seniority, location and sector, particularly in fintech and AI. For current qualitative and numeric benchmarks, see our salary benchmarks and the UK Tech Salary Report.
Should I hire a platform engineer or a backend engineer first?
If your product engineers are regularly blocked by infrastructure, deployment or environment issues, a platform hire will pay off quickly. If your core problem is shipping product features, a backend or full-stack hire usually comes first.