Infos pratiques

Date d'affichage :
19 avril 2018

Senior Java Developer (m/f)

Présentation de l'entreprise :

Tango is the leading alternative operator in Luxembourg, offering TV, Internet, fixed and mobile telephony services to residential customers, the self-employed and small businesses. Driven by its taste for a good challenge and intent on offering simplicity and clarity, Tango is focused on the user, and since its inception in 1998, has rolled out a strong innovation policy to provide the best technology at the fairest price.Close to its customers, the company relies on an efficient distribution network which includes 9 Tango outlets and 18 partner outlets. Tango also works closely with international partners, such as Vodafone, to ensure an optimal communication experience, even abroad. Thanks to a broad portfolio of products and efficient customer service, today, over 271,000 customers have put their trust in Tango.

As a member of the Proximus Group since 2008, Tango can also count on the support of its sister company Telindus, a leading integrator and operator in Luxembourg offering services in the field of fixed and mobile telecommunications, ICT infrastructure, the Cloud and security. Brought together under the Proximus Luxembourg structure since October 2016, the two companies cover all the expertise required to meet the needs of residential customers and businesses, whatever their size.

Job description

  • Senior Java developer responsibilities include designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
  • Able to work autonomously and guide/mentor intermediate and junior developers on the projects he is assigned to
  • Contribute in all phases of the development lifecycle
  • Write well designed, testable, efficient code
  • Ensure designs are in compliance with specifications
  • Understand client requirements and how they translate in application features
  • Perform unit and integration testing before launch
  • Troubleshoot and debug applications
  • Prepare and produce releases of software components
  • Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review


  • Minimum of 7 years of proven experience as developer
  • Bachelor / Master’s Degree in Computer Science / Business Information Systems
  • Proven experience leading development teams with successful results
  • Strong understanding of J2EE architecture and / or Spring
  • Profound insight of Java and JEE internals (Classloading, Memory Management, Transaction management etc.)
  • Strong server-side development experience of enterprise applications using Java EE / Spring
  • Familiarity with maven, agile practices, JIRA (or similar tools), enterprise and RESTful architectures
  • Strong experience in several of the following areas: Java J2EE, Spring, JUnit, SOA principals , REST services, SQL, ORM, JPA, database design, application servers
  • Familiarity with best practices for Java and design patterns
  • Current knowledge of XML, UML, HTML, Javascript, Linux/Windows
  • Proficient understanding of code versioning and CI tools, such as GIT/SVN, Jenkins, Sonar, Nexus
  • Good written and oral communication skills in English

Considered as plus:

  • ICT and Telecom Business domain understanding
  • Knowledge of Apache  Camel, BPM engines,  CXF web services,  Apache AMQ is a strong plus
  • Experience in developing front-end (Angular) is a strong plus
  • OSGI (Karaf),  Red Hat JBoss AS / EAP , Red Hat SSO , Red Hat Fuse is a strong plus
  • PaaS solutions like Cloudfoundry , Openshift
  • Microservices, Docker, Containers, Orchestration (Swarm, Kubernetes)


  • Team player who is flexible and able to work with end-users and production issues simultaneously
  • Excellent communication skills, must be able to clearly communicate ideas, decisions and reasoning to both technical and non-technical team members
  • Ability to work within a fast-paced environment with aggressive timelines
  • Technical mindset with great attention to detail
  • Creativity in addressing technical challenges / problem solver / analytical skills
  • Strong written and verbal skills: English is a must, French, German and / or Luxembourgish considered an asset

Our offer

A professional and stimulating working environment in the telecommunications sector. Various career opportunities within the Proximus Group on a national and International level, high-quality training and a rich and acknowledged expertise. We also offer you an attractive remuneration with many fringe benefits.