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Salary: €65,000–€85,000 per year
About The Company
hygi.de is a growing e-commerce company serving more than three million customers with a range of over 140,000 products. Around 300 colleagues contribute to our continued development, combining digital processes, practical ideas, and a strong focus on customer needs. We value short decision-making paths, individual ownership, and collaboration across teams. Our technology supports a large and expanding online business, giving you the opportunity to contribute to systems and services with meaningful reach and impact.
About The Role
As a Senior Backend Developer, you will help shape the architecture and development of hygi.de’s e-commerce platform. PHP 8.x and Symfony are your core tools, and you will work closely with three other backend developers and the Shop Team Lead. You will take responsibility for complex shop features, technical standards, and code quality while working with product owners and colleagues across the business.
This role also combines software engineering with the thoughtful use of artificial intelligence. You will apply AI coding assistants and agents to development tasks, assess their output critically, and help establish effective AI-supported workflows. In addition, you will identify and evaluate potential AI applications for the shop, ensuring that proposed solutions are reliable, useful, and commercially worthwhile.
Qualifications
You bring at least five years of professional backend development experience with modern PHP and Symfony. You have a strong understanding of software architecture and can assess approaches such as domain-driven design, modular monoliths, microservices, and event-driven systems. Your experience includes MySQL, performance optimization, caching, and queueing. Familiarity with technologies such as Redis and RabbitMQ is valuable.
You have practical experience with AI coding assistants or agents, such as Claude Code, Cursor, or GitHub Copilot, and can review AI-generated code with sound technical judgment. You understand that a good solution must be maintainable and technically appropriate as well as economically sensible. You communicate confidently in German and have a good command of English. We also value clear communication, a collaborative mindset, and the ability to explain technical decisions to colleagues with different areas of expertise.
Responsibilities
You will evolve our PHP 8.x and Symfony backend architecture, making informed decisions about scalability, maintainability, and performance. You will design and implement sophisticated e-commerce capabilities across checkout, pricing, product assortment, search, and fulfillment. You will maintain high engineering standards through clean code, automated testing, code reviews, and CI/CD practices.
You will use AI coding tools to support development, refactoring, testing, and documentation, while helping the team develop standards for responsible and effective AI-assisted workflows. You will explore practical AI use cases, including intelligent search, product data enrichment, recommendations, and process automation. Working with product owners and other stakeholders, you will translate business objectives into technical solutions and consider relevant measures such as conversion, average order value, margin, and process costs. You will also share your knowledge and act as a technical partner to developers and business teams.
Benefits
We offer an annual salary of €65,000–€85,000, a secure position in a growing e-commerce business, and a contribution toward company pension provision. You will receive 30 days of annual leave and flexible working hours with flexitime. Additional benefits include individual training and development opportunities, employee discounts across our product range, modern workspaces, and a digital working environment. We also offer bike leasing, regular team events, and complimentary drinks, fruit, and snacks. You will have the opportunity to take ownership, contribute ideas, and influence how our technology and cross-functional collaboration develop.
Equal Opportunity
hygi.de welcomes applicants with different backgrounds, experiences, and perspectives. We are committed to providing a respectful and inclusive workplace where colleagues can contribute and grow. Employment decisions are based on role-related qualifications, skills, and experience. We encourage all candidates who are interested in building reliable e-commerce technology and exploring the thoughtful use of AI in software engineering to apply.