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Mid-Level Backend Symfony Developer
Velstar
- Liverpool, England, United Kingdom
- Liverpool, England, United Kingdom
About
Experience: Mid-level developers typically have 3–5 years of experience, with a solid foundation in Symfony and PHP development.
Key Responsibilities Development
Independently develop and optimise features for web applications.
Refactor and improve existing code for maintainability and performance.
Write comprehensive unit and functional tests to ensure high-quality code.
Mentor junior developers, providing guidance and reviewing their code.
Quality Assurance & Best Practices
Maintain high code quality by following Symfony best practices (PSR-12, SOLID principles, dependency injection).
Optimise database queries and caching strategies for performance.
Implement security best practices (prevent SQL injection, XSS, CSRF, and other vulnerabilities).
Perform code reviews and ensure adherence to best practices.
Collaboration
Work closely with the seniors, team leads, designers, and frontend developers to deliver robust solutions.
Participate in technical discussions and contribute to architectural decisions.
Assist in estimating project timelines and ensure timely delivery.
What We're Looking For Technical Skills
PHP & Symfony Expertise
Strong understanding of PHP 8+ and Symfony framework (6/7).
Proficient in Symfony components (Routing, Forms, Twig, Doctrine, Console, Security, etc.).
Experience with Symfony Event Listeners, Subscribers, and Middleware.
Database & Performance Optimisation
Advanced SQL knowledge (MySQL/PostgreSQL).
Deep understanding of Doctrine ORM (custom queries, migrations, entity relationships).
Experience optimising database queries and implementing caching (Redis)
API Development
Experience building and maintaining RESTful APIs and working with GraphQL (nice to have).
Proficient in API authentication (JWT, OAuth).
Familiarity with API Platform (a plus).
Frontend Knowledge (Bonus)
Understanding of Twig, JavaScript, and CSS.
Familiarity with modern frontend frameworks (NextJs/React is a plus).
Version Control & Deployment:
Strong Git workflow (branching strategies, pull requests, rebasing).
Familiarity with Docker or cloud platforms (AWS etc.).
Soft Skills
Problem-Solving Mindset – Ability to debug complex issues efficiently.
Autonomy & Proactiveness – Work independently while collaborating with the team.
Attention to Detail – Writing clean, maintainable, and scalable code.
Mentorship – Support and guide junior developers to enhance team productivity.
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Languages
- English
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