Company description See more offers

One Source Consulting - Senior Java Developer

Duration: Long Term

Sector: Government

Languages: French & English




  • This expert resource will participate in the following task assignments:
  • Evolutive maintenance of the current Reusable Solutions service, mainly upon JEE
  • technology
  • Development, maintenance, and operation of the API GateWay
  • Deployment automation: Ansible, Rundeck
  • The organization of migration procedures involving Database and JEE Middleware.
  • Service monitoring: Prometheus, Grafana
  • Integration into the Client ecosystem (Eulogin, Cloud)
  • Evaluation of new Java libraries and frameworks
  • Evaluation of third-part projects and libraries in the stake of reusability
  • Integration of new JEE based technologies
  • Support, consultancy, and advice to the various development teams at the Client
  • Participate to support missions for any development team at the Client related to API management and security.
  • Presentation of the API GateWay service to new customer teams.
  • Analysis and design reviews of information systems enterprise-, information- and application component architectures
  • JEE expertise for code audit, testing, and deployment of applications.
  • Assistance with the implementation of the technical architecture during information system infrastructure development projects
  • Elaboration of guidelines and recommendations concerning technical architecture in software development, taking into account the existing infrastructure at the Client and its evolution.
  • Extensive technical documentation (in English) for platform and system administrators.
  • Extensive documentation and eLearning content design.
  • Production of software architecture documents.


Work Environment/Conditions

  • The work will be carried out on the Commission's premises in Brussels. The service
  • the provider may be requested to participate in project meetings with the Commission's
  • services in Luxembourg.
  • The working languages are English and French.


Other Precisions

  • The service provider shall have the following expertise:
  • The experience as stated in the framework contract for the regarded profile.
  • Excellent knowledge of English (spoken, written) and good knowledge of French (spoken, written).
  • Project management within projects of methodology application or application on change management.
  • Sound experience in projects that have applied successfully well-established software engineering methodologies.
  • Rapid self-starting capability and experience in team working.
  • Presenting in front of large varied audiences.
  • Presentation preparation skills.
  • Drafting skills.
  • Competent communicator.
  • Customer and results-oriented individual.
  • Good planner, able to follow more than one subject at a time.
  • Proactive attitude, communicative (i.e. good listener), and customer-oriented.


Specific Expertise

  • The service provider shall have the following expertise:
  • Expertise in Java programming language and Enterprise Integration
  • Excellent knowledge of Web security and Web identity federation and authorization
  • protocols: OAuth, OpenIDConnect, SAML, XACML.
  • Multiple years' work experience with JEE technology platform and specifically in the
  • following standards and at least one of the related implementations: 2.3 -> 3.0
  • Excellent knowledge of one API GateWay product (installation, configuration, and operation).
  • Expertise in Linux administration, Bash.
  • Multiple years' work experience with WebLogic application server, Tomcat, and Jetty.
  • Multiple years' work experience with Spring framework, Spring Security, Spring
  • MVC, Spring Integration, and Apache Camel.
  • Extensive experience in Agile projects in relation to the following development, continuous integration, and quality tools: SVN, Maven, Eclipse, Jira, Bamboo, BitBucket, Confluence.
  • Experience in Web application security: authentication with SSO and Cas, authorization (Spring security and ACP), JWT, Open ID Connect.
  • Experience in integration projects.
  • Expertise in Oracle Database:
  • Effective work experience with SQL, PL-SQL in Oracle.
  • Effective experience in migration, export/import, scripts versioning tools (Liquibase or Flyway).

Company description

At Onesource, we are into IT staffing and people solutions and project outsourcing.

We are having operations and offices in Belgium, The Netherlands, UK, Bangalore and Hyderabad - Totally 5 offices.
In a short time we have grown to the extent of 50 employees. Our company founders and senior managers have more than 100 years of combined experience in IT and they have played the roles of hardcore IT project manger, program manager, IT architect and strategic consulting manager.

90% of our employees are having either computer science or IT college degree as background and therefore we help clients with high quality people solutions. We have an excellent combination of offshore and onshore set up, spread across 4 countries. We also have our marketing managers present full time in Belgium, The Netherlands and UK.
We use Artificial Intelligence and Data Mining tools to source excellent resumes. We are experts in finding out solutions for difficult IT manpower requirements in the areas of Cyber security, SAP, Artificial Intelligence, DevOps etc.,

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