Senior Backend Developer

We’re looking for an experienced Magento backend developer to help lead the delivery of high-quality e-commerce solutions and mentor a growing team. About JH JH is an e-commerce agency dedicated to helping growth-orientated brands make their next strategic breakthrough. We specialise in building, maintaining, and enhancing online stores enjoyed by millions worldwide. We work with notable clients across various markets and sectors, like Big Bus Tours, Graham and Green, and Woodies. Our clients share a common trait: the drive to innovate or lead their markets. We support their goals through strategic consulting, design, development, support, and ongoing optimisation. What you’ll be doing You’ll take a leading role in the development team, shaping the technical delivery of our projects and fostering an environment of collaboration and innovation. Your deep expertise in Magento, PHP, and backend technologies will ensure the solutions we build are robust, scalable, and aligned with client goals. Additionally, you’ll play a key part in mentoring and supporting team members, sharing knowledge, and upskilling the next generation of developers. Development You’ll be responsible for crafting and maintaining high-quality, scalable code while ensuring alignment with project requirements. Write clean, efficient, and scalable code in PHP (with basic JavaScript capabilities). Lead the setup of new Magento projects, including version control and environment deployment. Deliver advanced coding solutions with Magento, PHP, and GraphQL. Troubleshoot and debug code effectively to resolve issues. Optimise web applications for maximum speed and scalability. Collaborate with cross-functional teams to scope, quote, and plan technical deliverables. Leadership You’ll set an example for excellence in backend development and support the growth of the team. Coach and mentor less experienced developers to enhance their skills. Take ownership of projects as the main developer, managing them from inception to completion. Play a leading role in scoping and preparatory work, providing technical expertise and input. Create and maintain technical documentation for internal and client use. Innovation You’ll stay ahead of the curve, ensuring our solutions leverage the latest technologies and best practices. Keep up-to-date with the latest backend development tools and technologies. Advocate for and implement modern development standards and techniques. Support test work across multiple devices, ensuring compatibility and usability. What we’re looking for This role requires someone who can fulfil the responsibilities listed above by possessing the majority of the capabilities outlined below. However, we value a passion for learning and self-development just as highly. Technical Expertise Essential: Advanced knowledge of Magento 2, PHP 8+, and GraphQL Good understanding of automated testing concepts and frameworks (PHPUnit, integration tests, API tests) Good understanding of server administration (Linux/Unix) and DevOps (CI/CD, Docker) Experience using Git for version control and team collaboration Experience with package managers (Composer) Nice to have: Experience with GitHub (version control, pull requests, code reviews) Experience with CI/CD tooling and pipelines, specifically CircleCI Experience writing and maintaining automated tests (unit tests, integration tests, functional tests) Experience with Adobe Commerce Cloud Knowledge of performance optimization and caching (Redis, Varnish) Experience with monitoring and logging tools Experience with Hyvä Project Experience Proven ability to deliver high-quality backend solutions for e-commerce platforms. Experience managing and maintaining projects as the main developer. Ability to independently set up and deploy Magento projects from scratch. Familiarity with gathering and implementing user feedback to enhance solutions. Personal Skills Excellent communication and interpersonal skills. Strong coaching and mentoring abilities. Skilled at managing stakeholders and providing clear, engaging updates. Highly organised with exceptional planning abilities. Resilient under pressure with a passion for learning and innovation. Remote readiness Comfortable working in a remote-first environment using tools like Slack, Google Meets, and Loom. Self-motivated and proactive in managing your workload. Have a suitable working environment for remote work and productive collaboration. Willing to travel occasionally for team and client meetings. Benefits of working at JH We offer a range of benefits such as: Remote working Flexible hours (with time banking) 31 days annual leave (inclusive of Bank Holidays) Funds for professional development and home office setup Quarterly personal development plans Top-of-the-range hardware and software Remote socials and in-person events (twice a year) How to apply You will be asked to provide: CV emphasising the relevant experience you have Portfolio or examples of relevant backend development work Hiring Process Review: We assess each application against this job description. Chat: We have an informal call with suitable candidates. Interview: We invite the top candidates for deeper interviews. Final round: The final two speak directly with our CEO. Offer: We select the best candidate and make them an offer. Welcome: We plan for the arrival of our new colleague. We aim for this process to take less than two to three weeks, so nobody is left waiting. Please note only candidates from the UK and EU will be considered.