Mid-level Backend Symfony Developer

Velstar Ltd.; Liverpool; Hybrid; GBP 45,000 - 65,000; Full time

Job summary

A dynamic e-commerce development firm in Liverpool seeks an experienced Full-Stack Developer to contribute to building robust APIs and modern user interfaces. You will design and implement new API endpoints using Symfony, alongside developing responsive features with React and Next.js. Ideal candidates have over four years of experience in full-stack web development, strong skills in Symfony and React, and a proven ability to optimize databases. Join a collaborative environment with hybrid working conditions.

Qualifications

• 4+ years of professional experience in full-stack web development.
• Strong practical experience with the Symfony framework (v5/v6/v7).
• Proficiency in React and Next.js.
• A solid grasp of services, routing, security, and Doctrine.

Responsibilities

• Design and implement new API endpoints and business logic using Symfony (PHP) & API Platform.
• Build responsive features and components using Next.js and React.
• Work with our database (e.g., MySQL) and Doctrine ORM to optimise data retrieval.
• Write unit and integration tests to maintain code quality.

Skills

Symfony framework

React

Next.js

MySQL

Docker

JavaScript (ES6+)

CSS

Git

Problem-Solving Mindset

Attention to Detail

Job description

This permanent role follows a hybrid model, requiring 3+ days per week in-office

The Role

Your primary focus will be on contributing to building robust, scalable APIs using Symfony API Platform and crafting highly performant, modern user interfaces with Next.js and React. This is an excellent opportunity to further your career in e-commerce development within a collaborative and innovative environment.

Key Responsibilities

• Backend Development: Design and implement new API endpoints and business logic using Symfony (PHP) & API Platform ensuring high performance and security

• Frontend Development: Build responsive, user-friendly features and components using Next.js and React (including hooks, functional components, and state management).

• Data Management: Work with our database (e.g., MySQL) and Doctrine ORM to optimise data retrieval and storage.

• Testing & Quality: Write unit, integration, and functional tests (PHPUnit, Jest) to maintain high code quality and prevent regressions and maintain high code quality by following best practices (PSR-12, SOLID principles, dependency injection)

• Collaboration: Participate in planning meetings, architectural discussions, and provide constructive feedback during code reviews.

• Deployment: Use Git and Docker to manage your code and contribute to our continuous integration and deployment pipelines.

What We’re Looking For

• 4+ years of professional experience in full-stack web development.

• Strong practical experience with the Symfony framework (v5/v6/v7).

• A solid grasp of services, routing, security, and Doctrine.

• Proficiency in React and Next.js. You should be comfortable building complex UIs and leveraging Next.js features like routing and API routes.

• A good understanding of modern JavaScript (ES6+), HTML5, and CSS.

• Experience with relational databases (e.g., MySQL or PostgreSQL).

• Experience with containerisation (Docker)

• Familiarity with Git version control and common development workflows.

• Problem‑Solving Mindset – Ability to debug complex issues efficiently.

• Attention to Detail – Writing clean, maintainable, and scalable code.

Bonus Points If You Have

• Familiarity with cloud platforms (AWS).

• Knowledge of asynchronous tasks/queues (e.g., Symfony Messenger).