Senior Full Stack Engineer (Shopify)

Job Title: Senior Full Stack Engineer (Shopify) Employment Type: Permanent, Full-time Location: We welcome applications from candidates across Bulgaria for this fully remote role . Please note that you will need to have the right to work in the Bulgaria, as we are currently unable to offer visa sponsorship. WE ARE ZIGZAG - THE WORLD’S MOST CONNECTED ​POST-PURCHASE AND RETURNS NETWORK We are an award-winning eCommerce returns and post purchase specialist, founded in 2015. With over 250 team members across the UK , Bulgaria , France , Portugal , Germany , and Spain , we are continually innovating the after-checkout experience for our retailers by reducing cost and complexity, driving sustainability, and fostering customer loyalty. Today, our SaaS platform provides access to over 3,000 carrier lanes across 170 countries, supporting more 1,100 retailers including our leading enterprise and logistics clients The Very Group, New Look, Boden, Selfridges, Sports Direct, The Hut Group, Swarovski, L’Occitane, Photobox, Carrefour, Lands’ End and DHL. We were the experts in returns. Now we are the experts in the whole post-purchase experience! 👉 Discover more: https://www.zigzag.global/about-us OUR CULTURE AND VALUES Our culture is built on three core values, Start-up Spirit , Human Heart , and a Grown-up Mindset which guide how we collaborate and make decisions. It isn’t something written on posters – it’s something we bring to life every day through our actions, our relationships, and how we show up for each other and our customers. Everyone plays a role in shaping our culture through how we communicate, support one another, and celebrate success. Being a ZigZagger means taking ownership, bringing curiosity and energy to everything you do, showing resilience when challenges arise, and leading with care by putting “we before me.” You’ll use sound judgment, stay open to new perspectives, and continuously look for ways to learn, grow, and improve. About the Role We are currently recruiting for 2 Senior Full Stack Engineer (Shopify) to join our Engineering team. As a Senior Full Stack Engineer, you will be responsible for designing, developing, and maintaining scalable software solutions across our SaaS platform and eCommerce ecosystem. The role will play a key part in building and scaling innovative products, delivering high-quality customer experiences, and supporting the ongoing evolution of our technology platforms. Experience working with Shopify or other leading eCommerce platforms is highly advantageous, particularly in the areas of system integrations, custom functionality development, and enhancing customer-facing digital experiences. Key Responsibilities Design, develop, test, and maintain scalable full-stack applications. Build and enhance features across our SaaS platform and Shopify environment. Collaborate closely with the team, reviewing and refining code, offering guidance and support to junior members of the team. Collaborate with Product Managers, Designers, and Engineers to deliver high-quality solutions. Develop and maintain integrations between Shopify and internal business systems. Contribute to technical architecture decisions and best practice standards. Contribute to the continuous improvement of our development processes Optimise application performance, security, and scalability. Participate in code reviews and support the continuous improvement of engineering processes. Work closely with stakeholders to understand business requirements and translate them into technical solutions. What We're Looking For Significant experience as a Full Stack Engineer within a SaaS environment. Proven ability to work independently and manage competing priorities in a fast-paced, high-pressure environment, while maintaining high standards of code quality and best practice. Strong commercial experience with PHP and Laravel. Strong Front-end skills: React (or similar framework), CSS. Experience working with relational databases such as MySQL or PostgreSQL. Familiarity with cloud platforms such as AWS, Azure, or Google Cloud. Strong understanding of software architecture, design patterns, and scalable application development. Experience using Git and modern CI/CD practices. Fluent English language skills, both written and verbal. Strong problem-solving skills. Solid understanding of Agile methodologies, particularly Scrum. Understanding TDD, BDD, Clean Code, and SOLID principles. Highly Desirable Skills Experience building and deploying custom Shopify apps. Expertise in Shopify Functions, Shopify Flow, and custom checkout extensions. Experience integrating ERP, CRM, PIM, and third-party fulfilment systems. Knowledge of headless commerce architectures using Shopify Hydrogen/Oxygen. Experience developing and maintaining Shopify or Shopify Plus solutions. What We Offer 20 days’ annual leave plus public holidays, with additional holiday entitlement awarded for each completed year of service (up to a maximum of six extra days). Plus, to celebrate you, enjoy an extra day off on your birthday. Collaborative working environment Remote or hybrid work options – remote working with possibility to work from our Varna office Healthcare insurance with dental service included Food vouchers ( €102.26 month per person) 👉 Explore our full range of benefits here : ZigZag Bulgaria Social Benefits.pdf If you are interested, please send your CV in English. Equity, Inclusion & Transparency In line with the EU Pay Transparency Directive, we are committed to transparency and will share the salary range for this role prior to the interview stage. A diverse and inclusive workplace where everyone feels a sense of belonging is a priority, and applications are welcomed from people of all backgrounds and experiences. Reflecting how we live our own values of meritocracy over hierarchy , even if not every requirement is met, interest in the role is encouraged. Hiring focuses on people as well as skills—if this opportunity resonates, you’re encouraged to apply and bring your unique perspective.