Software Engineer with Perl & Java for the United Domains Development team (hybrid)

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 the team:

At United-Domains, we power the backbone of domain registration and management services for over 300 000 customers worldwide with access to 1000+ TLDs. Our Backend Team is the engine behind seamless domain ordering, DNS management, and scalable infrastructure. Join us to solve complex challenges in a collaborative, innovative environment where your code makes a direct impact.

The role:

We’re hiring a skilled Software Developer to enhance our domain ordering backend service. You’ll design, optimize, and maintain critical systems handling high-volume transactions, API integrations, and database architecture. Your work will ensure reliability, scalability, and security for our global domain services.

We also offer on-the-job training. If your skills and experience do not entirely match the job description, but you have the technical experience and ability to quickly pick up new skills we are ready to teach you. This extends even to Perl, if you’re highly experienced in another language and open to learning Perl, we welcome you.

Main responsibilities:

• Develop, deploy, and maintain Perl-based backend services for domain ordering;
• Integrate with third-party APIs (JSON/XML) for domain registration and management;
• Building new backend services in Java / GO;
• Design and optimize MySQL schemas, queries, and data workflows;
• Troubleshoot Linux service issues and ensure maximum system availability;
• Collaborate with teams to refine software methodologies and CI/CD practices;
• Document solutions and contribute to architectural decisions.

We appreciate:

• Perl expertise: Backend/systems development, CPAN module usage, and script optimization;
• Java or Go experience;
• At least 3 years of experience in backend development;
• Linux Proficiency: Command-line mastery, service deployment, and troubleshooting;
• Database Design: MySQL schema development and complex query tuning;
• APIs & Integrations: Experience with remote APIs (JSON/XML/REST);
• Version Control: Git;
• Core Skills: Fluent English, exceptional problem-solving, and knowledge of SDLC best practices.

Would be a plus:

• Domain industry knowledge (DNS, nameservers, domain lifecycle);
• Familiarity with Modern Perl practices (Moose, PSGI, Plack);
• Experience with Mini-CPAN or internal CPAN management.

Bonus skills(Value Add):

• Containerization (Docker, Kubernetes);
• JavaScript proficiency;
• CI/CD pipeline design (Jenkins, GitLab CI).

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;
• 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.