Senior Platform Engineer (PHP)
Fully Remote (UK)
Up to £90,000
12 Month FTC
We’re working with a high-scale SaaS business undergoing significant engineering growth and platform evolution, currently looking to add a Senior Platform Engineer into a highly technical, product-engineering-led environment.
This role sits within a senior platform function focused on improving developer experience, internal tooling, scalability, and platform reliability across a large engineering organisation. The business operates at significant scale, supporting thousands of customers and handling high traffic volumes daily.
This is not a traditional infrastructure-heavy Platform Engineer role. The focus is much more around backend/platform engineering, developer enablement, tooling, systems scalability, and solving engineering problems that improve how development teams build and ship software.
What You’ll Be Doing
* Designing and improving internal platform and backend tooling
* Supporting engineering scalability, reliability, and developer experience initiatives
* Working closely with Platform, SRE, DevEx, and wider engineering teams
* Improving CI/CD workflows, QA/development environments, and automation processes
* Contributing to high-scale backend systems and platform optimisation work
* Mentoring engineers and leading smaller technical initiatives
* Supporting AI-assisted engineering workflows and tooling adoption across teams
What They’re Looking For
* Strong backend engineering experience using PHP
* Experience working within high-scale SaaS or product-led environments
* Strong systems thinking and platform engineering mindset
* Experience building scalable backend systems and APIs
* Strong communicator with collaborative working style
* Comfortable mentoring engineers and taking ownership of technical problems
* Cloud experience (AWS preferred)
* Passion for improving engineering efficiency and developer workflows
Nice To Have
* DevEx / Internal Developer Platform (IDP) experience
* ECS, containers, or distributed systems exposure
* AI tooling experience (Claude, Cursor, Copilot etc.)
* React/frontend ecosystem familiarity
Why This Role Stands Out
* Fully remote working
* Engineering-led culture with strong technical leadership
* Opportunity to shape internal developer experience at scale
* Modern cloud-native environment with strong investment into platform engineering
* AI-first engineering approach with active experimentation and tooling adoption
* High autonomy and ownership within a collaborative senior engineering team
* Interesting scalability and systems challenges in a large SaaS environment
This role would suit a strong backend/platform engineer who enjoys solving engineering problems at scale, improving developer experience, and working within a modern product engineering culture.