We're seeking a Senior Backend Platform Engineer to improve developer experience, internal tooling, scalability, and platform reliability in a high-scale SaaS business. The ideal candidate will have strong backend engineering experience using PHP and a systems thinking mindset. This is a fully remote role with a competitive salary of up to £90,000.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Nice to Have
Job Description
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
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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
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- 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.
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