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!

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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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