Senior Backend Engineer – PHP and Symfony

Senior Backend Engineer – PHP and Symfony
A fantastic opportunity for a Senior Backend Engineer to join a growing, integration-focused SaaS company. Working within a small and experienced engineering team, you will build and maintain a wide range of production integrations with external software platforms. This is a highly autonomous role combining hands-on PHP and Symfony development with complex third-party API integration work and increasing ownership of the company’s AWS infrastructure.
Location: Fully remote within the UK. Ideally, you will be based near London, as you must be available to travel to London for occasional team meetings.
Salary: £55,000 - £70,000 per annum depending on experience. Additional paid weekend on-call rota, performance bonus and share options.
Requirements for Senior Backend Engineer:
Strong commercial experience developing production software using PHP
Commercial experience using Symfony
Proven experience building and maintaining multiple third-party integrations in production
Experience with REST APIs, webhooks, OAuth, rate limiting, retries, error handling and asynchronous systems
Strong production experience with AWS, including containers, monitoring and incident response
Experience with infrastructure as code, ideally Terraform
Strong understanding of automated testing, code quality and CI/CD practices
Experience independently troubleshooting integrations involving external systems and incomplete documentation
A pragmatic approach to engineering, with the ability to balance technical quality against commercial delivery requirements
Comfortable working autonomously within a small, fully remote engineering team
Confident proposing solutions and challenging technical decisions constructively
Willingness to participate in a paid weekend on-call rota -approx. once a month (you will be paid even if no calls are taken)
Based in the UK, with the right to work
Experience within payments, travel technology, marketplaces, hospitality or another integration-heavy SaaS environment would be beneficial
Responsibilities for Senior Backend Engineer:
Design, build and maintain multiple third-party integrations using PHP and Symfony
Develop individual microservices connecting the platform with external APIs and webhook-based systems
Take ownership of a new family of integrations from initial design through to production
Contribute to platform and API features across the wider software estate
Investigate production issues and identify whether problems originate from the code, configuration or an external platform
Learn the existing AWS environment and progress towards significant infrastructure ownership
Improve observability, automated testing and CI/CD quality gates across the platform
Support upgrades to current versions of PHP and Symfony
Contribute informed opinions to architectural decisions as the platform continues to scale
Participate in a paid weekend on-call rota supporting urgent out-of-hours issues
Collaborate asynchronously through messaging, pull requests and focused technical discussions
What this role offers:
Significant technical ownership within a growing, integration-focused SaaS business
The opportunity to influence architecture, engineering practices and the future direction of the platform
Excellent longer-term scope to take on wider technical and management responsibilities as the company grows
Applications:
If you would like to apply for this unique Senior Backend Engineer role, please send your CV via the relevant links!
We’re committed to creating an inclusive and accessible recruitment process. If you need reasonable adjustments for your application or during the review process, please email applications@redtech-recruit.com separately (if the job board has removed this email address, full contact details are available on our website).
Keywords: Senior Backend Engineer / Senior PHP Developer / PHP Engineer / Symfony Developer / Integration Engineer / Based in the UK with the right to work. PI Engineer / Backend Software Engineer / Platform Engineer / Cloud Engineer / Microservices Engineer / Software Integration Developer / AWS Engineer / PHP / Symfony / AWS / REST APIs / Webhooks / OAuth / Terraform / Docker / Microservices / CI/CD / GitHub Actions / Event-Driven Architecture / Infrastructure as Code / SQS / Lambda / MySQL / MariaDB / Redis / DynamoDB / Grafana / Prometheus / Computer Science / Software Engineering / Information Technology / Computing / Mathematics
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