Mid-Level Full-stack Developer (Symfony & Next.js/React)

Velstar; Leeds; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A leading tech firm in Leeds is seeking a Full-Stack Developer to contribute to building robust APIs with Symfony and modern user interfaces using Next.js and React. Candidates should have over 4 years of experience in web development and a strong grasp of both frontend and backend technologies. This role offers an excellent chance to grow within a collaborative environment focused on e-commerce development. You'll take part in all phases of development from planning to deployment.

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, comfortable building complex UIs.

Responsibilities

• Design and implement new API endpoints and business logic using Symfony.
• Build responsive features and components using Next.js and React.
• Write tests to maintain high code quality and prevent regressions.

Skills

Symfony framework

React

Next.js

JavaScript (ES6+)

MySQL or PostgreSQL

Docker

Tools

Git

PHPUnit

Jest

Job description

This role is office based at least 3 days per week.

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 containerization (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).