.
Senior Backend Engineer (Node.js) @ CKSource
  • Poznań
Senior Backend Engineer (Node.js) @ CKSource
Poznań, Poznań, Greater Poland Voivodeship, Polska
CKSource
14. 3. 2026
Informacje o stanowisku

We are the company behind CKEditor — an open-source rich text editor used by millions of people around the world. We are part of Tiugo Technologies, a family of API-first developer platforms (CKEditor, TinyMCE, ButterCMS, Uploadcare) focused on content creation and digital collaboration.

Your role:

As an Engineer on our AI team, you will drive the evolution of AI capabilities powering CKEditor 5 — working at the intersection of AI and content creation, where LLMs meet their most natural application: text processing. Youll design prompt strategies, integrate models from providers like OpenAI, Anthropic, and Google Gemini, and build intelligent features such as contextual text predictions, automated content generation, and advanced text processing. 

Our core stack is TypeScript and Node.js. Were looking for an engineer with genuine passion for AI and a solid backend foundation - someone who can build production-grade services, not just prototypes, and who balances cutting-edge innovation with robust implementation.


  • Over 5 years of software development experience.
  • Strong proficiency in TypeScript and Node.js.
  • Experience building and maintaining backend services - REST APIs, relational databases (PostgreSQL), message queues, Docker.
  • Fluency in Polish (minimum C1) and good command of English (minimum B2)
  • Excellent problem-solving skills and the ability to think critically and creatively.
  • Outstanding communication skills, both verbal and written.

Nice to have:

  • Experience integrating third-party APIs (LLM providers, external services).
  • Understanding of AI/LLM concepts - prompt engineering, function/tool calling, streaming.
  • Experience with cloud infrastructure (AWS - SQS/SNS, S3, ECR).
  • Familiarity with observability tools (OpenTelemetry, tracing)
  • Curiosity about AI and willingness to learn how LLMs work.
  • Experience with event-driven architectures and real-time data processing (streaming, WebSockets, or similar).

We are the company behind CKEditor — an open-source rich text editor used by millions of people around the world. We are part of Tiugo Technologies, a family of API-first developer platforms (CKEditor, TinyMCE, ButterCMS, Uploadcare) focused on content creation and digital collaboration.

Your role:

As an Engineer on our AI team, you will drive the evolution of AI capabilities powering CKEditor 5 — working at the intersection of AI and content creation, where LLMs meet their most natural application: text processing. Youll design prompt strategies, integrate models from providers like OpenAI, Anthropic, and Google Gemini, and build intelligent features such as contextual text predictions, automated content generation, and advanced text processing. 

Our core stack is TypeScript and Node.js. Were looking for an engineer with genuine passion for AI and a solid backend foundation - someone who can build production-grade services, not just prototypes, and who balances cutting-edge innovation with robust implementation.

,[Design, build, and maintain backend services for CKEditor 5 - including REST APIs, real-time streaming, event-driven processing, and data persistence., Build and maintain a multi-service architecture with message queues, caching, and async communication patterns., Engage in code reviews, pair programming, and cross-functional collaboration to ensure the highest quality results., Write clean, maintainable, and well-structured code, balancing readability with appropriate documentation., Share best practices on programming standards, tools, and processes to foster continuous improvement. Requirements: Node.js, TypeScript, REST API, PostgreSQL, Relational database, Message queue, Docker, Communication skills, AI, Cloud, AWS, Amazon SQS, SNS, AWS S3 Tools: Jira, GitHub, Agile, Scrum. Additionally: Enel Med or Medicover, Multisport card, Language classes, Language courses, Quarterly and annual financial bonuses, Professional development resources, Extra leave for Tiugo Day, Extra leave for your birthday, Access to a mental health and well-being platform, 2 weeks of paid parental leave for our contractors, Free coffee, Bike parking, Shower, Free snacks, Free beverages, In-house trainings, In-house hack days, Modern office, Startup atmosphere, No dress code.

  • Praca Poznań
  • Poznań - Oferty pracy w okolicznych lokalizacjach


    124 223
    20 358