Senior Node.js Developer - Cloud Services Team

Development · Poznan, Wielkopolskie
Department Development
Employment Type Employment

CKSource is a successful software company with more than 14 years on the market. There’s a good chance you’ve used one of our products or at least read online content created with our rich text editing component - CKEditor.


We're currently looking for a Senior Developer to join our backend team responsible for CKEditor Cloud Services.

CKEditor Cloud Services is a largely real-time backend project aiming to aid and expand the capabilities of the CKEditor 5 and CKEditor 4 software projects with new features. Its main functionality is collaboration - enabling several people to work together editing a document. On the technical side, it comprises from several dozens of Node.js microservices (TypeScript and we are introducing DDD), using MySQL (AWS RDS), Redis (AWS ElastiCache), queue systems (AWS SQS), Consul or ZeroMQ, run from AWS ECS, while the infrastructure is created with Terraform (and others).


What we expect you to have:

  • At least 4 years of experience.
  • Knowledge of Node.js.
  • Knowledge of SQL and NoSQL databases.
  • Experience with message queues like RabbitMQ or AWS SQS.
  • Interest in software design patterns and architecture.
  • Knowledge of KISS, DRY, SOLID principles.
  • Ability to write tests (unit tests, integration tests, E2E tests).
  • Good command of English (at least B2).

What would be nice to have:

  • Experience with microservices.
  • Experience with DDD.
  • Experience with AWS and Terraform.
  • Experience with CI/CD.
  • Being familiar with TypeScript.
  • Being familiar with Docker.
  • Being familiar with WebSockets.


In return we offer:

  • B2B contract (680 - 860 PLN net per day) or employment contract (10.800 - 14.100 PLN gross).
  • Working with a fantastic team of developers who are nice people after hours, too.
  • Stable, reasonable and flexible working conditions - you decide the starting hours and can take a break during the day if needed.
  • A great company where we cooperate, communicate openly, care for, and respect one another.
  • We highly value our employees’ development, providing challenging tasks and independent decision-making (choice of solutions, technology, tasks, etc.).
  • Additional days off and budget for self-development (up to 5 days and 6.000 PLN a year depending on the company tenure).
  • Private healthcare package of choice (either Enel Med or Medicover).
  • MultiSport card.
  • English lessons.
  • Friendly office with a relaxed atmosphere during and after hours.

By clicking the "Apply now" button you hereby authorize CKSource sp. z.o.o. sp.k. to process your personal data provided in the application documents for realising the recruitment process pursuant to the Personal Data Protection Act of 10 May 2018 (Journal of Laws 2018, item 1000) and in agreement with Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (General Data Protection Regulation). The above consent is voluntary, you have the right to withdraw your consent at any time. The administrator of your personal data is CKSource Sp. z o.o. Sp.k. based in Warsaw, ul. Słomińskiego 15. Your data will be processed only for the purposes of the recruitment process. After the recruitment process your data will be deleted.

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  • Location
    Poznan, Wielkopolskie
  • Department
  • Employment Type