Senior TypeScript/Node.js Wizard

We are the company that stands behind the spectacular success of CKEditor, used by millions of people around the world. At CKSource we produce software components that other developers use to build their applications (WYSIWYG editor, file manager, document converters, etc.). Our flagship product is CKEditor 5 – an open-source, modern TypeScript, rich text editor with custom data model and virtual DOM – check our GitHub repository.

We are part of Tiugo Technologies, a launchpad for new developer platforms, helping software companies accelerate growth, increase operating efficiency, and scale their business. Tiugo contains a suite of brands that are API-first, market-leading developer platforms focused on content creation and digital collaboration. Tiugo’s current family of brands includes CKEditor, TinyMCE, ButterCMS, and Uploadcare.

Together our products have powered millions of software applications and websites. Enabling content and communication in everything from Microsoft to NASA, you might not know our name, but you’ve probably used our software.

Your impact

You’ll take a key role in designing and maintaining our internal, modular backend framework – built in TypeScript and shared across all our backend services. It’s the foundation that powers CKEditor Cloud Services, CKBox, AI features, and more.

Our system consists of around 30 microservices, running in a distributed architecture on AWS ECS, communicating via SQS and (in some places) ZeroMQ, with infrastructure managed through Terraform. We care deeply about type safety, testability, and observability, and your work will directly shape the tools and patterns other teams use every day.

This isn’t just about writing services — it’s about building a framework with type safety in mind, clean architecture, and the best developer experience at its core.

You’ll be responsible for:

• Designing and evolving the backend framework in TypeScript and Node.js — with a strong emphasis on type safety, extensibility, and great DX for other teams
• Building reusable modules and internal tooling
• Championing software quality, observability, and maintainability
• Helping define standards and best practices used across the company

We’re looking for someone who:

• Has strong expertise in TypeScript and Node.js, and knows how to leverage the type system to write robust, maintainable, and developer-friendly code
• Understands how to build developer-facing tools, libraries, or frameworks
• Writes code that’s easy to test, extend, and refactor
• Has a strong grasp of software architecture and knows how to make smart trade-offs
• Cares deeply about developer experience, code quality, and long-term maintainability
• Is comfortable working in English (spoken and written)

Bonus if you:

• Have contributed to open-source (especially Node.js/TS libraries, tooling, or frameworks)
• Follow what's new in the TypeScript ecosystem
• Have worked with modern languages that emphasize type safety and expressive type systems — like Rust, Haskell, Scala, Gleam, etc.
• Have worked on platform teams or in DevEx roles
• Care about documentation, code style, and code consistency
• Have experience with Terraform or infrastructure automation

Why join CKSource:

Our people are a huge part of what makes CKSource a great place to work! Aside from a great team, some of our benefits include:

• The salary range for a B2B contract is 24000 PLN - 32000 PLN + VAT per month
• Annual financial bonus depending on the company’s performance
• Flexible schedule and fully remote work
• Professional development resources
• LinkedIn Learning access
• Extra leave for Tiugo Day - our company’s foundation day and your birthday
• English lessons with a native speaker and an online language platform where you can learn English, Spanish, and German
• Access to a mental health and well-being platform with 24/7 dedicated psychological support
• Private medical care (Enel Med or Medicover) and Multisport card
• 2 weeks of paid parental leave for our contractors

Our recruitment process:

• HR call with Ola Mroczek (People & Culture Specialist)
• Technical interview with Radek Potyka (Team Leader) and Józef Flakus (Senior Software Engineer)
• Interview with Bartek Czerwonka (Senior Director of Engineering)