(Junior) DevOps Engineer (m/w/d) Mobilfunk

About the Position

CHECK24 is the comparison portal: We are market leaders and a dynamic startup in one. In agile teams, we make quick decisions and live flat hierarchies. Through the targeted use of modernest tools and technologies and state-of-the-art methods of AI, we drive data-driven innovations - always with an eye on the added value for our customers. Every day, we work on more than 50 products to continuously improve the user experience of our over 20 million customers.

Located in Cologne between Friesenplatz and Mediapark, we are responsible for the CHECK24 mobile comparison and are looking for a new team member (m/w/d) for one of our ambitious IT teams. You have already gained initial professional experience and want to take your next career step in a successful company that also offers real added value to its customers?

Then we look forward to your application as a (Junior) DevOps Engineer (m/w/d) at the CHECK24 Vergleichsportal Mobilfunk GmbH.

Responsibilities

• System Operation and Maintenance: You perform updates, security optimizations, and regular maintenance measures to ensure stable and secure system operation
• Backend Development: The conception, development, and further development of backend functionalities with PHP and Symfony is within your area of responsibility
• End-to-End Responsibility: You operate our mobile-specific IT systems (e.g., booking platforms) and are responsible for them throughout the lifecycle
• Scaling Systems: You take care of the setup and further development of our Linux-based infrastructure – from server setup and automation to CI/CD processes and ensuring stability and performance through monitoring, logging, and ongoing optimizations
• Working in a Team: Close cooperation with product management, frontend development, and other departments within an IT taskforce in the mobile sector – with a focus on backend, DevOps, and the scaling and further development of the systems characterizes your daily work

Requirements

• Qualification: You have a very good degree in Computer Science, Business Informatics, Mathematics, Physics, or a comparable field
• Web Architecture Understanding: Basic knowledge of web technologies and communication standards such as HTTP, RESTful APIs, as well as frontend/backend communication is familiar to you
• Database Knowledge: You confidently use relational databases such as MySQL in daily development work
• Fullstack Readiness: You are interested in implementing features in the backend and developing yourself in this area
• Practical Experience: You have very good knowledge of CI/CD processes, Docker-based environments, and monitoring and logging solutions (e.g., Grafana). Additionally, interest in programming languages such as Go, PHP, or Python and enjoyment in developing clean and scalable code
• Tech Stack: Very good practical experience in the Linux environment as well as with configuration and deployment tools (e.g., Ansible, Puppet, Terraform, or Chef). You also have knowledge of web and infrastructure technologies such as Docker, Nginx, PHP-FPM, NodeJS, MySQL (including backup/replication), and a basic understanding of networks (firewall, routing, VLAN)
• Working Method: Structured, independent working style and enjoyment in working together in a team characterize you
• Language Skills: Negotiable German and English language skills at least at C1 level round off your profile

We Offer

• Modern Working: Up to 40 days of paid vacation. You receive 30 days of vacation and can decide whether you work from home on Fridays, collect up to 10 additional vacation days per year, or alternatively choose a salary increase
• Personal Growth: Individual development and training opportunities through further education and regular feedback discussions and a personal further education budget to recognize and develop your strengths and potential
• We Value Your Commitment: Unlimited contracts with an attractive and performance-based salary package including annual bonuses. Vouchers for numerous CHECK24 products, subsidized occupational pension scheme, fitness partnerships (Urban Sports Club & EGYM Wellpass), and daycare partnerships (Fröbel and pme Familienservice)
• On the Move: Our central location in Cologne allows for convenient access by public transport or bicycle – we offer you a 100% free Germany ticket & promote your company bike leasing
• Feel at Home: Modern office with an extensive beverage offer, a muesli and nut bar, fresh fruit and vegetables, as well as free office lunch from regional caterers three times a week and monthly team lunches
• Your Ideas are Implemented Quickly: Independent, agile work in small teams with strong team spirit. Short decision-making processes are a matter of course for us
• We Equip You: An ergonomic workplace with modern equipment (such as MacBook and two additional screens) and height-adjustable tables is available from your first day of work
• We are also a great team outside of work: Numerous drink-outs and events for celebration and networking as well as legendary summer and Christmas parties

Contact

Lea Wotzko

[email protected]

Please send us applications exclusively online via our application form.

Apply Now