As a Senior Software Engineer – Operations (f/m/d), you will build and improve the integrations that connect KoRo's internal systems with external partners and platforms. You will take ownership of critical backend services and data flows across ERP, logistics, finance, and e-commerce, ensuring they are reliable, secure, and scalable. Working closely with Engineering and business teams, you will drive technical improvements and contribute to high engineering standards.

What you will do:

• Backend Development & Integrations: You design, build, and maintain scalable backend services, APIs, and integrations connecting internal systems with external partners and platforms.

• Technical Ownership: You take end-to-end responsibility for selected integration domains, ensuring reliable performance, maintainability, and continuous improvement.

• Architecture & Standards: You improve system architecture, automate critical workflows, and contribute to clean, scalable, and maintainable engineering solutions.

• Code Quality & Best Practices: You conduct code reviews, ensure high coding standards, and identify potential issues related to performance, security, and maintainability.

• System Reliability: You troubleshoot complex production issues, identify root causes, and improve monitoring, alerting, and automated testing to prevent recurring problems.

• Cross-Functional Collaboration: You work closely with engineering and business teams to translate requirements into technical solutions and share knowledge with junior and mid-level engineers.

What you bring:

• 5+ years of experience in backend software engineering, with strong expertise in PHP, Symfony, REST and GraphQL APIs, system integrations, and asynchronous processing using message queues (e.g. RabbitMQ).

• Hands-on experience with Docker, Docker Compose, GitHub Actions, GitHub Container Registry, and automated testing frameworks such as PHPUnit or Pest.

• Strong understanding of software architecture, clean code principles, and distributed systems, with experience building reliable, scalable applications.

• Strong problem-solving and communication skills, with the ability to take technical ownership, collaborate across teams, and support other engineers.

• Experience with high-volume data processing, asynchronous message queues, and building and maintaining data pipelines and event-driven systems.

• Excellent written and spoken English skills

Nice to have:

• Experience with Temporal, RoadRunner, Testcontainers, or OpenTelemetry.

• Familiarity with OAuth 2.0 and e-commerce platforms such as Shopware

What's in it for you:

• Smart Working & Flexibility: Flexible working hours, hybrid work, and 20 days of workation. We trust you to take ownership: you deliver on our shared goals and structure your day in the way that works best for you. You’ll also start with 28 days of vacation, increasing by one additional day per year of tenure (capped at 30 days), so you always have time to recharge.

• Growth & Setup: A structured onboarding plan to get you started, plus a dedicated development budget for your personal and professional growth. You’ll also receive your own MacBook and a fully equipped office setup with monitors and height-adjustable desks.

• KoRo Life & Extras: Free snacks and barista coffee in the office, 20% discount in the KoRo Online-Shop, and exclusive perks with partner companies. On top of that, a fully funded BVG ticket (Jobticket), a subsidy for your fitness membership (Urban Sports Club, Hansefit, or FitX), and a company pension scheme (bAV) via Ginkgo.

• Shared Moments: Regular team events and company parties to celebrate milestones and successes together.

We're looking for People who share our Mindset

For us, it's not just about the what, but above all about the how. You'll be a perfect fit for us if you have the following mindset:

• You take initiative and ownership. You don't wait for a perfect brief or a mandate to get started. When you see an opportunity, a risk, or something that can be improved - you act. When things don't go as planned, you look at your own contribution first and step up, without waiting to be asked.

• You thrive in change. Shifting priorities and evolving processes don't slow you down. You adapt fast and keep moving.

• You build, you don't wait. When something is missing - a tool, a process, a solution - you create it. You prefer a working MVP over a perfect plan and iterate from there.

• You think in leverage. You question how things are done, prioritize ruthlessly, and find smarter paths to better outcomes. You don't mistake effort for impact.

• You're a team player, humble and genuinely kind. You collaborate in and across teams, care about the people around you, and bring sparkles to the room. You speak up when you disagree, commit fully once a decision is made, and actively make the people around you better.

Own it – Move fast – Build it – Create impact – Lift others

Sounds good?

Then we’d love to hear from you! Send us your CV and tell us a little about yourself in a few introductory sentences – who you are, what drives you, and why you’d like to become part of KoRo. After all, we’re looking for team members, not just co-workers!

The KoRo team is just as diverse as our product range! We want to keep it that way as our nut-loving team grows. That’s why we welcome all applicants regardless of gender, nationality, ethnic or social background, religion or belief, disability, age, sexual orientation, or identity.

Ready to join KoRo? We look forward to hearing from you!