We are looking for you as

Senior PHP Engineer (m/w/d)

in nationwide

Interzero Business Solutions GmbH is one of the leading environmental service providers based in Cologne. As a full-service provider of recycling services, it offers industry and trade services for the return of sales and transport packaging, product recycling, deposit return, innovative reusable transport packaging, as well as consulting and disposal services for locations, warehouses, and branches.

nationwide

Fulltime

Immediately

Permanent employment

What is it about?

Build Digital Products that #MoveTheDate

We’re building our product department inside one of Germany’s leading sustainability companies. Our mission: deliver digital services that push Earth Overshoot Day further into the future by enabling a true circular economy. Some initiatives start from a blank sheet of paper; others extend and modernise our existing platform. If you’d like to shape what we build - and how we build it - rather than just pick up tickets, let’s talk.

Key responsibilities include:

• Collaboration: Together with Product, UX and Front-End colleagues, design and implement the PHP back ends of both brand-new and evolving products you’ll stay with for the long haul.
• Modeling: Translate business goals into sturdy domain models and reliable services that deliver real customer value.
• Architecture: We’re moving toward a headless, microservice-oriented landscape. As a senior, you’ll help create clean APIs, refine coding standards and champion the right refactorings.
• Automation: Build and refine GitLab pipelines, Docker images and workflow engines that remove manual steps – both in development and inside the products themselves.
• Frontend partnership: Partner closely with front-end teams so the data, endpoints and performance they need are always there, making the user experience shine.
• Leadership: Mentor junior engineers, run architecture sessions or even lead a small squad when it fits your personal goals.
• Innovation: Experiment with new PHP features, Laravel packages, cloud services and patterns that help us close product loops faster. Your ideas are welcome.

Advantages:

• Variety: shape greenfield services from scratch and breathe new life into proven applications - both matter equally.
• Work where you thrive: 100 % remote within Germany or on-site in our modern offices - your call.
• Competitive salary plus extensive benefits: company pension scheme, Germany ticket, bike leasing, family & life counselling, comprehensive health programmes and more.
• Opportunity to shape: Plenty of freedom to influence how our new product organisation takes shape.
• Purpose with measurable impact: every feature you ship advances the circular economy and our #MoveTheDate mission.

Profile:

• Experience: 5 + years of professional PHP experience, with deep knowledge of Laravel (Eloquent, Queues, Artisan, etc.).
• Programming Skills: Solid grasp of RESTful API design, relational databases (MySQL/PostgreSQL) and containerisation with Docker.
• Frontend: Familiarity with our frontend technology stack (React/Next.js/Typescript) can be a plus, if you want to work full stack, you can.
• DevOps: Familiarity with GitLab CI/CD – our DevOps team handles the heavy lifting, but you know your way around.
• Commerce: Experience with Magento and/or eCommerce in general can help us in some products.
• Architecture: A feel for clean architectures, test automation (PHPUnit, Pest, Cypress) and the judgement to choose the right pattern at the right time.
• Languages: Fluent English (German is a bonus), a collaborative mindset and genuine curiosity about how products succeed in the real world.
• EU-Work: A valid EU work permit; candidates already based in Germany (or nearby EU countries) are strongly preferred.

Ready to make a difference?