Software Developer – Connect (f|m|d)

We ensure more security in the connected world! For this purpose, achelos is looking for talented and creative minds for its headquarters in Paderborn. With your knowledge, we work together on innovative solutions in the field of cybersecurity. Sounds exciting? Then start a successful future with a leading provider.

Applications are invited from both candidates with prior work experience as well as from motivated graduates with relevant technical knowledge.

Software Developer – Connect (f|m|d)

Your future role:

As a Software Developer Connect (m/f/d) you will work together in an international agile team. As a team member you will be responsible for implementing software components for various products from the achelos Connect segment. In particular, you will deal with customer requirements and security requirements for our subscription management systems.

  • You are responsible for the development and implementation of the concept for different products in the Connect area
  • You will be involved in requirements analysis on the technical level and in the creation of functional and requirement specifications based on customer requirements and/or technical specifications.
  • You are the contact person for inquiries within the project team as well as for our customers.
  • You work in an international agile team.
  • Work location is Paderborn and possibly at client's site if necessary.

Your profile:

  • You have good to very good programming skills in Java.
  • You have experience in REST API definition and implementation.
  • You have knowledge in REST API test creation and test execution.
  • You have knowledge in building and extending modern microservice architectures.
  • You have experience with crypto libraries (BouncyCastle, ...).
  • You have knowledge in the area of SQL databases.
  • You are fluent in written and spoken English.


The following are considered beneficial:

  • Experience in the use of Linux-based operating systems
  • Knowledge of container virtualization and orchestration (e.g., Docker, Kubernetes)
  • Experience with Amazon Web Service (AWS) and/or MS Azure
  • Knowledge in the development of current web technologies (e.g. JavaScript, Angular)
  • Knowledge of software testing
  • SOAP experience incl. WS-Addressing and WS-Security
  • ISTQB Certified
  • German language skills, spoken and written

What we offer:

  • A full-time, permanent position
  • 30 days holiday plus company closing days
  • Exciting and complex assignments in a modern, dynamic and growing company with a lot of creative freedom
  • Open and fair work atmosphere
  • Flat organizational structure based on collegial leadership
  • Flexible working hours with the option of mobile working
  • Fair pay
  • Further vocational training
  • Company bike leasing
  • Company events

Apply now!

Join us and become part of our agile and growing team. Simply send us your application, salary expectations and earliest starting date!

Annette Kalz

Human Resources


+49 5251 14212-0

Annette Kalz

Human Resources

Tel.: +49 5251 14212-0

About achelos

achelos GmbH is a manufacturer-independent software development and consulting company based in Paderborn. Founded in 2008, the technology expert develops and operates highly specialised products, solutions and services that meet international security standards. In addition to general security-related topics, achelos concentrates worldwide on industry solutions in the segments like Health, Industry, Public and Connect. Its customers and partners include government institutions, private companies and organisations. The company offers an extensive portfolio and expertise in the areas of testing tools, Testing as a Service (TaaS) and certification. achelos is ISO 9001 and ISO 27001 certified. achelos Hungary Kft. has been operational since June 2022 as an additional development site in Budapest.

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