Software Engineer with Java and Node.js for Sedo AdTech Team (hybrid)

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At IONOS, the leading European provider of cloud infrastructure, cloud services and hosting services, you will work together with a wide range of teams. We are characterized by open structures, a friendly working culture and flat hierarchies with a strong team spirit. We firmly believe that work and fun are compatible, and offer you the right environment for this. Our constant growth means that we are always looking for new colleagues. Become part of IONOS and grow with us.

About us:

Sedo’s story began in 1999 with the launch of sedo.de, a pioneering project that quickly revolutionized the domain industry and led to the founding of Sedo GmbH in 2001.

We are looking for Java and Node.js talent to innovate with us!

Are you passionate about software development and want to make a real impact on innovative products? This is your opportunity to join our team as a Software Engineer with Java and Node.js.

If you are motivated by the challenge of building products from scratch, proposing continuous improvements, and leading with your expertise, we would love to meet you!

Apply now and take the next step in your professional career!

About the team:

In 2010, we introduced an early version of Search Arbitrage, which evolved into SedoTMP—our RSOC AdTech product that today drives immense growth and has become a central focus of our strategy.

Our technology stack includes the following:

• Backend: Spring Boot, Apache Camel, Node.js; communication via REST or message queues.
• Code Quality: Testing with JUnit; we value test code as much as production code.
• Continuous Delivery: Terraform, Git, Helm, Jenkins.
• Operations: Docker containers in Kubernetes clusters (Private/Public Cloud on AWS).
• Monitoring: ELK, Prometheus, Grafana, Icinga.

Main responsibilities:

You will be a key part of the design, development, and evolution of our products, actively participating from conception to production deployment, following the principle "You build it, you run it" with the support of our DevOps team. In this role, you will:

• Design and develop new features to solve complex requirements with the latest technologies.
• Develop backends in Java and Node.js using the "API-first" approach.
• Implement and continuously operate your services.
• Ensure code quality and evolve development standards.
• Participate in software architecture definition and technology selection.
• Mentored and supported intermediate and junior developers.
• Work closely with Product Owners and requirements management teams.
• Actively participate in agile processes.

You will also face challenges that will help you grow both technically and professionally, such as:

• Improve documentation and clearly defined processes.
• Adapt to rapid changes in technologies and product requirements.
• Work in an environment with multiple parallel developments and constant evolution.

We appreciate:

• Solid experience in Java development, especially in REST APIs.
• Knowledge of Spring Boot, Apache Camel, Hibernate/JPA.
• Experience with Node.js and TypeScript (server-side).
• Experience with modern web services (REST, HTTP, API standards) and SQL databases.
• Ability to work in Linux/Unix environments.
• Critical thinking skills and ability to propose innovative solutions.
• Interest in continuous learning and adopting new technologies.
• Valuable experience in DevOps, microservices architectures, Docker, and Kubernetes.
• Formal education is not a requirement; we value expertise and a practical approach more.

What we offer:

• Access to local/international trainings, development and growth opportunities, including access to e-learning platforms, covering both technical and soft skills areas;
• Modern technologies, product responsibility;
• Flexible work schedule;
• Hybrid work option;
• Medical services package from one of two private providers;
• 25 vacation days per year;
• Substitute days off for public holidays that occur on the weekend;
• Meal tickets;
• Internal referral program;
• Employee anniversary program;
• Team events, networking events organized to promote a passionate, creative and diverse culture;
• Summerfest and Winterfest parties;
• Of course, coffee, soft drinks and fresh fruits are on us in the office.

About IONOS

IONOS is the leading European digitalization partner for small and medium-sized businesses (SMB). The company serves around six million customers and operates across 18 markets in Europe and North America, with its services being accessible worldwide. With its Web Presence & Productivity portfolio, IONOS acts as a 'one-stop shop' for all digitalization needs: from domains and web hosting to classic website builders and do-it-yourself solutions, from e-commerce to online marketing tools. In addition, the company offers Cloud Solutions to enterprises who are looking to move to the cloud as their businesses evolve.

We value diversity and welcome all applications - regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.