Test Engineer

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Test Engineer

You're the knowledge pole for used test methodologies and tooling.


Hi there! We are Calendar42, thought leaders in the field of planning and mobility.

We plan.


Always the best match. Data driven, real-time, smart and logical.

What we do

At Calendar42 we develop algorithms for planning and mobility optimisation. This translates into a diversity of services that among other improve travel information, optimise trip planning for field organisations and simplify matchmaking of skilled workers.

The C42 platform enables organisations to continuously improve their (logistic) value chain by applying advanced algorithms to business processes that contain any form of planning. Our platform is actually the back-end of the back-end of our clients software. At the same time, due to the versatility of our team, we are a full service partner that creates, develops and rolls out end-to-end solutions.

We are active in various business markets including construction, temporary staffing industry, healthcare, public transportation, events and festivals industry, government, delivery services, insurance and financial services.

We thank our knowledge and results to an international team of highly skilled professionals. These people are part of an ambitious, inquisitive and curious team in a growing organisation. Our team currently exists of 25 developers, UX designers and operational support staff.

Our workplace

We work in an inspiring open office in Delft, nearby the city centre. Our open and ambitious culture is endorsed by several aspects that we have incorporated in our work habits, like:

  • Daily healthy lunch with the team
  • Weekly team meetings
  • Monthly team meeting with input from all teams
  • Quarterly team building activities or outings
  • Regular afterwork drinks and activities
  • Office masseuse
  • Yoga class

Your mission

We are looking for a Test Engineer who can supplement our team with knowledge of REST API test strategies who has coding skills and experience in communicating test procedures within a development environment, so he or she can contribute to our ultimate goal: making lives easier by (un)planning the future. You will be joining the Tech team, working closely with other Test Engineers, the Development team, Project Managers and Product Owners. Together you make sure that our products are bug free and of high quality.

Key responsibilities

  • Develop and execute API test in complex test environments
  • Set up Postman/REST API tests
  • Eager to explore new tools and techniques
  • Interact with our multidisciplinary team existing of developers, service designers, product owners and project managers
  • Analyse and understand test requirements to devise test strategies and test cases
  • Organise and execute tests and log results
    • Responsible for E2E test developments

Experience & knowledge

  • Experience with REST API's testing in a complex environment
  • Programming experience in writing and executing complex Python scripts 
  • Knowledge of Javascript is a plus
  • Experience in test and defect management tools such as TestRail and Jira
  • Working experience in dynamic Agile environments
  • Ability to challenge our products to detect hidden issues
  • Strong verbal and written communication skills in English (the universal language of C42 is English)

Acquisition regarding this vacancy is not appreciated