Senior Front-End Developer

Job description

Experienced Front-End developers wanted. Our products involve unique and industry leading solutions and we are looking to expand our teams. Does the thought of working with Scalable Web Architecture intrigue you? Over 200 developers from around the world have joined us already, ensuring that our services maintain the highest standards possible. We need you to challenge your knowledge and expertise with us! Join our headquarters in Luxembourg and work in a diverse, international environment.


What you will really be doing

  • Using JavaScript (a lot, really)
  • Developing and maintaining Front-End applications, libraries, and tools
  • Participating in the process of creating technical specifications
  • Unit and Integration testing your code
  • Mentoring fellow developers
  • Taking part in the research of new technologies and solutions
  • Working closely together with Back-End developers



  • MSC or BSC in Information Technology or equivalent experience
  • 5+ years of experience coding in Vanilla JavaScript
  • Experience with high-availability, high-performance and scalable system solutions
  • Strong OOP skills and knowledge of design patterns
  • Extensive experience in HTML, CSS3 (flex, grid) and Preprocessors (SASS, LESS)
  • Familiar with Front-end build tools: Webpack, Gulp, Babel
  • Experience with at least one of React, Angular2, Backbone, or other such frameworks
  • Solid understanding of the JavaScript ecosystem (Node, NPM)
  • Sense about how a good API work
  • Being able to use the Command Line for everyday actions
  • Knowledge of Unit Testing and Test Driven Development
  • Clean Coding as your most important principle
  • Ability to think analytically and overview complex systems
  • Team player spirit
  • Urge to learn, follow latest improvements and apply those into our products
  • Broad knowledge of Agile methodologies
  • Upper intermediate English knowledge (B2) or higher

Desired Skills

  • Node.js experience
  • Experience using streaming technologies (Wowza, FMS, HLS, WebRTC)
  • Experience with RWD and/or multiplatform technologies (PC/Mobile/TV)
  • Ultimate SVG skills
  • Extensive understanding of ServiceWorkers
  • Familiarity with Extreme Programming (XP)
  • Functional Programing principles
  • Common sense regarding the OpenSource era
  • Knowledge of other programming languages
  • Continuous integration and deployment
  • Linux administrator knowledge
  • Keen to use types (TypeScript, Flow)
  • RDB, noSQL, GraphQL or Bigdata experience
  • Interest in WASM

What we offer

Salary and benefits

  • Competitive salary
  • Relocation package and moving assistance from HR if relevant
  • Meal vouchers
  • Private health insurance 
  • Additional holiday entitlement based on length of service with the company
  • Free gym membership
  • Sympass discount card

Company culture

  • Dynamic and friendly atmosphere
  • A multi-cultural environment made of 30 different nationalities, with English as the official language
  • Daily breakfast in the office
  • Free coffee, tea, and fresh fruit every day
  • Fantastic events, including Christmas Parties, Family Days, Hackathons and other surprises
  • Chill rooms, creative areas, and LAN parties
  • Company branded merchandise (goodies)
  • High quality of life offered by Luxembourg

Professional growth

  • Opportunity to attend conferences, certifications, technical workshops, trainings, and meetups
  • Free language courses in the office
  • Enthusiastic professionals to learn from
  • Possibility to advance in the company