Senior Back-end Developer - Java (m/f/d)

Lisboa ou Braga, Portugal

Infelizmente o prazo desta vaga expirou.

Knower™ Tech is a brand belonging to the Wellow™ Group that aims to match qualified professionals with the market.


  • Passion for building a great consumer product
  • At least 5 years of proven track record of working with Java (preferable, 8+) or similar OOP Languages
  • Experience working with a high concurrency/high transactional/highly available platform
  • Ability to understand the dependencies between components and how they combine to deliver service to the consumer and business
  • Ability to easily recognize system deficiencies and implement effective solutions
  • Expertise using established design patterns
  • Drive to encourage appropriate use of reusability techniques (e.g. design patterns, library extraction, new component creation)
  • Ability to support and mentor other colleagues
  • Good English level (at least B2)

Nice to Have:

  • Familiarity working with Client-server protocols such as SOAP, REST
  • Experience working with Kafka and message queueing systems
  • Knowledge of Scala, Akka, memcached, Apache Storm, Apache Cassandra, ZooKeeper
  • Awareness and experience in using agile methodologies
  • Ability to interact effectively with other functional teams
  • Excellent communicator, common sense and a passion for the art of problem solving

What we offer:

  • Salary package and contract compatible with experience and ambitions
  • Benefits (day off on birthday, health insurance, extra vacation days, admission kit, various get-togethers, etc.)
  • Training plan and continuous learning environment
  • Skills development opportunities



We believe that talent overcomes age, gender identity, ethnicity, political or religious orientations, it overcomes barriers of expression, educational levels and physical limits. Our commitment is to the merit of those who seek to be a better version of themselves every day! For this reason, we seek to ensure that our recruitment and selection process is inclusive and respects the individuality of each person, creating a healthy and happy experience for those who come across us. Learn more about our commitment at!