About the role
Responsibilities: Own and deliver backend work in the core Symfony application, working fully independently within 2–3 months of starting. Critically assess code produced by the team and by AI tools, challenging proposed solutions and ensuring important aspects have been properly thought through. Help move the application from Symfony 6.1 to Symfony 7, resolving versioning and legacy issues currently blocking the upgrade. Improve application performance, scalability and maintainability so new features are easier and safer to add. Work with the Angular front end, TypeScript and Python AI agent services, and the DevOps team where backend changes cross those boundaries. Read and reason about the Angular/TypeScript codebase despite the role being strongly backend weighted; strong front-end development skills are not required. Understand how decisions affect the wider system, including Symfony, Angular and AI services, while identifying detail gaps in code and AI-generated output. Challenge solutions, identify root causes and improve how things are built rather than simply completing tickets. Deliver well-reasoned, maintainable solutions within a legacy codebase while maintaining a steady delivery pace. Work with high autonomy and accountability while collaborating effectively within a remote, cross-functional squad. Respect SOC 2, PII and security controls without exception. Requirements: 8+ years of commercial software engineering experience, including 5+ years in PHP. 7+ years of PHP experience at Expert level. 3+ years of recent commercial Symfony 6.x/7 experience at Advanced level. Very senior Laravel experience that is clearly transferable may be considered, provided you have a solid understanding of how Laravel and Symfony differ. 4+ years of Advanced experience in backend system design and scalability. 2+ years of Advanced experience critically using AI tooling, including reviewing and challenging AI-generated output rather than accepting it blindly. 5+ years of Advanced MySQL experience covering schema design and query optimisation. PostgreSQL or another relational database at the same depth may be considered. 1+ year of Angular/TypeScript awareness. React or Vue with TypeScript may be considered, but zero front-end exposure is disqualifying. 3+ years of Advanced automated testing experience with PHPUnit. Pest or equivalent PHP testing frameworks may be considered. 1+ year of Intermediate experience with framework upgrades and legacy-code modernisation. Major version upgrades or refactoring in other large PHP codebases may be considered. 2+ years of Intermediate AWS experience. Azure or GCP may be considered. Fluent written and spoken English. Strong written and verbal communication and a proven record of working effectively remotely. Ability to work UK hours. Ability to pass strict background checks and comply with PII policies. Strong self-sufficiency, with the ability to work with zero handholding after 2–3 months while continuing to collaborate effectively. A hands-on technical approach with an architect mindset: understanding how and why the system works rather than only producing code. Nice to Have: 2+ years of Intermediate CI/CD experience with GitHub Actions; GitLab CI, Jenkins or Azure DevOps are suitable alternatives. Basic experience with Amazon Redshift or data warehousing; Snowflake or BigQuery may be considered. Azure exposure alongside AWS. Previous project leadership experience. Previous mentoring and technical leadership experience with other engineers.
What you’ll bring
- Responsibilities: Own and deliver backend work in the core Symfony application, working fully independently within 2–3 months of starting.
- Critically assess code produced by the team and by AI tools, challenging proposed solutions and ensuring important aspects have been properly thought through.
- Help move the application from Symfony 6.1 to Symfony 7, resolving versioning and legacy issues currently blocking the upgrade.
- Improve application performance, scalability and maintainability so new features are easier and safer to add.
- Work with the Angular front end, TypeScript and Python AI agent services, and the DevOps team where backend changes cross those boundaries.
- Read and reason about the Angular/TypeScript codebase despite the role being strongly backend weighted; strong front-end development skills are not required.
- Understand how decisions affect the wider system, including Symfony, Angular and AI services, while identifying detail gaps in code and AI-generated output.
- Challenge solutions, identify root causes and improve how things are built rather than simply completing tickets.
Skills connected to this role
- SQL
- Python
- TypeScript
- React
- AWS
- Azure
- GCP
- AI
- Git
- CI/CD
- Communication
- Leadership
Application source
This opportunity was collected from the employer-hosted Lever board. CarrerFit is an independent career platform and is not the hiring employer.