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Lead Developer

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We seek a Java Lead Developer to play a key role in developing the open-source Harmony eDelivery Access product for EU-wide cross-border data exchange. In this role, you will collaborate with NIIS team members and stakeholders to ensure the product meets the users’ needs.


  • Architect and develop the Java-based Harmony eDelivery Access software and related components.
  • Develop and maintain the Harmony eDelivery Access technical documentation.
  • Determine resource requirements and produce a development roadmap for the Harmony eDelivery Access.
  • Ensure that the Harmony eDelivery Access development is delivered on time and within budget.
  • Lead external developers and provide technical guidance and support.
  • Keep abreast of emerging trends regarding eDelivery and make recommendations.
  • Collaborate with stakeholders to understand their needs and ensure that the Harmony eDelivery Access meets their requirements and expectations.
  • Provide support to the Harmony eDelivery Access users.


  • Experience in the following technologies: Java, JavaScript, MySQL, Linux, Docker, cloud platforms (e.g., AWS, Azure, GCP), CI/CD tools (e.g., Jenkins), automation tools (e.g., Ansible), PKI.
  • Minimum of 5 years of experience in software development.
  • Strong understanding of software design and development principles.
  • Knowledge of API development and integration.
  • Familiarity with agile development methodologies.
  • Strong communication and interpersonal skills.

The following are considered as an asset:

  • Experience in the different policy domains and projects where eDelivery is utilised.
  • Understanding of the relevant EU policies and regulations impacting interoperability.
  • Previous experience in developing or deploying interoperability solutions.
  • Knowledge of one or more of the following specifications: eDelivery AS4 Profile, AS4 Profile of ebMS, OASIS ebXML Messaging Services, eDelivery SMP Profile, OASIS SMP Specification and OASIS BDXL Specification.


We offer...

  • an operating environment that is unique even by international standards
  • an opportunity to influence the development of digital societies
  • an international team with talented people of different backgrounds
  • a chance to work remotely in your preferred location within the EU
  • a good mixture of group and individual work
  • low hierarchy and minimal viable bureaucracy
  • opportunities for professional development and training
  • up-to-date devices and equipment
  • a competitive compensation package
  • comprehensive occupational healthcare.

NIIS is an equal-opportunity employer committed to ensuring equality and promoting diversity in the workplace. We will give everyone the chance to work in an environment where their rights are respected.

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