Join the team

Current openings

• Senior Frontend Engineer

  RemoteWarsawPoznań

  24 000 - 32 000

  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're also innovating in AI — CKEditor AI integrates intelligent, in-editor AI features, making content creation smarter and more efficient.

  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 new role

  • You'll work on the development of our flagship products – CKEditor 5 and CKEditor AI;
  • You’ll write clean, maintainable, and well-documented code (although well-written code doesn't need comments, or does it? 😉);
  • You’ll use practices such as code review, pair programming, and testing;
  • You'll share good practices on programming standards, tools, or other processes;
  • You'll be developing features and services that will directly impact our customers’ experience and speed up our company’s growth.

  About you:

  • You feel like taking up the challenge of working on an open-source application used by millions of users
  • You have at least 4-5 years of experience as a Software Engineer.
  • You have the ability to complete complex software projects and deliver products.
  • You present strong programming skills and proficiency in TypeScript and JavaScript.
  • You keep your hand on what’s going on in the web dev world, from frameworks to AI.
  • You are focused on quality, tests, simple solutions, and clean code.
  • Despite the knowledge that you already have, you feel there is always more to learn.
  • You have a good command of English (at least B2).

  Nice to have

  • Contributing/contributed to open-source projects.
  • Experience with AI tools in day-to-day development.

  What we offer

  • A great atmosphere in a team of talented developers who are nice people, too :)
  • Flexible working hours – we start our workday between 8-10. If you need to go out somewhere – no problem.
  • Tasks tailored to your predispositions.
  • The total monthly compensation package range for this position is 22 000 PLN - 32 000 PLN (b2b). Available forms of employment: agreement B2B or contract of employment.
  • Quarterly and annual financial bonus depending on the company's performance.
  • Additional days off and financial resources for personal development (up to 5 days and 6.000 PLN yearly, depending on the work experience).
  • English lessons with a native speaker and an online language platform with the possibility to learn English, Spanish, and German.
  • Private medical care (Enel Med or Medicover) and Multisport card.
  • Access to mental health support and personal growth resources through Mindgram.
  • 2 weeks of parental leave for our contractors.

  Recruitment process

  • HR interview.
  • Technical Interview with the hiring manager and Engineering team member.
  • Short meeting with team members.

  Apply now

  Contact person

  Maja Woszczykm.woszczyk@cksource.com

  Location

  RemoteWarsawPoznań

  Employment type

  Contract of EmploymentB2B

  Salary

  B2B:(net fv)

  24 000 - 32 000

  Contact of Employment:(gross)

  equivalent of B2B

  Skills

  TypeScriptJavaScriptAIEnglish

  Apply now

• Principal Product Engineer

  RemoteWarsawPoznań

  38 000 - 45 000 PLN

  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 a Principal Product Engineer, you will work at the intersection of engineering, product discovery, and product delivery. Your main focus will be on CKEditor, starting with the editor and frontend experience, and extending to supporting backend services and AI where relevant. You will also contribute to other CKSource products, with a stronger emphasis on frontend components and shared building blocks.
  • Your primary mission is to identify high-leverage opportunities, rapidly prototype solutions, and evolve the best experiments into production-ready capabilities.
  • You will collaborate closely with engineering leaders, product managers, and domain experts to shape product direction. You will also work with teams across the editor/frontend, cloud services, and integrations to ship end-to-end features.
  • This role requires a builder mindset and comfort operating in ambiguity. It is a high-autonomy individual contributor position where you influence product direction across CKEditor and CKSource. You will also help teams adopt AI-assisted development in their daily workflows.

  Key responsibilities:

  • Solve high-impact problems across CKEditor and CKSource products, spotting where AI or automation can add value.
  • Work with product and engineering stakeholders to clarify goals, scope, and success metrics.
  • Design pragmatic end-to-end solutions across the editor, backend services, and other portfolio products.
  • Prototype quickly, iterate with feedback, and evolve the best ideas into production features.
  • Build integrations and platform patterns (APIs, workflows, ecosystems) that extend product capabilities.
  • Influence technical direction and best practices across teams, helping others adopt new tools effectively.
  • Drive adoption of AI-assisted development (agents, reviews, testing, ops) to improve how we build and ship software.

  To be successful in this role you need the following:

  • 8+ years of experience in software engineering.
  • Strong system design and frontend engineering skills, with hands-on experience in modern frontend technologies (JavaScript / TypeScript).
  • Ability to move from problem definition → architecture → implementation.
  • Experience with automation, workflows, or agent-like systems.
  • Hands-on approach and willingness to write production code.
  • Fluency in Polish and English (minimum C1 level).
  • Strong engineering judgment (including knowing when not to use AI).
  • Experience working across teams and influencing technical decisions. Ability to collaborate effectively with different groups.
  • Curiosity, ownership, and a strong interest in applying AI in practice.
  • Experience with AI in developer tooling or internal systems.

  Nice to have:

  • Experience working on complex frontend applications or with developer tools.
  • Experience with rich text editors, document systems, or collaborative editing tools.
  • Background in content platforms, developer tools, or productivity software.

  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:

  • B2B contract-based monthly remuneration is 38.000 - 45.000 PLN + VAT or its equivalent on the employment contract.
  • Flexible schedule and the possibility to work fully remotely.
  • Professional development resources (up to 5 days of additional leave and 6 000 PLN yearly).
  • 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.

  Recruitment process:

  • HR interview.
  • Technical interview with the Director of Engineering.
  • Paid task – a practical assignment reflecting real challenges you may encounter in this role.
  • Solution review discussion – a conversation about your approach, decisions, and trade-offs in the task.

  Apply now

  Contact person

  Maja Woszczykm.woszczyk@cksource.com

  Location

  RemoteWarsawPoznań

  Employment type

  Contract of EmploymentB2B

  Salary

  B2B:(net fv)

  38 000 - 45 000 PLN

  Contact of Employment:(gross)

  equivalent of B2B

  Skills

  JavaScriptTypeScriptEnglishAI

  Apply now

• Principal Applied AI Engineer

  RemoteWarsawPoznań

  38 000 - 45 000 PLN

  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:

  • We’re looking for a Principal Applied AI Engineer to solve high-impact problems across our products and internal systems using a pragmatic combination of software engineering, systems thinking, and AI.
  • You will work across CKEditor AI & Cloud Services, internal tools, and cross-functional initiatives, identifying where AI or automation can create real value, shaping the solution, and building it end to end.
  • A significant part of this role is improving how software is built inside the company. You will design and implement agentic workflows and AI-assisted development systems that enhance how engineers write, review, test, and operate software.
  • You are expected to use AI as part of your own daily engineering workflow - not just build AI systems for others.
  • This role is for a senior hands-on engineer who is comfortable operating in ambiguity, moving from problem definition to architecture to implementation, and influencing how other teams adopt AI effectively.

  Key Responsibilities:

  • Solve high-impact problems across product and internal systems, identifying where AI or automation can create real value.
  • Work closely with engineering, product, and business stakeholders to understand problems, clarify goals, and define the right approach.
  • Design pragmatic, end-to-end solutions from architecture and technical plans to production-ready systems.
  • Build systems involving LLMs, integrations, and multi-step or agentic workflows.
  • Make sound engineering decisions across model choice, orchestration, evaluation, latency, cost, reliability, security, and maintainability.
  • Write production-quality code, build prototypes, and evolve them into robust, scalable solutions.
  • Influence technical direction across teams, define best practices, and help others adopt AI effectively.

  To be successful in this role you need the following:

  • 8+ years of experience in software engineering.
  • Strong system design and backend engineering skills.
  • Experience building and shipping AI / LLM-based solutions.
  • Ability to move from problem definition → architecture → implementation.
  • Experience with automation, workflows, or agent-like systems.
  • Hands-on approach and willingness to write production code.
  • Strong engineering judgment (including knowing when not to use AI).
  • Fluency in Polish and English (minimum C1 level)
  • Experience working across teams and influencing technical decisions.
  • Curiosity, ownership, and interest in applying AI in practice.

  Nice to have:

  • Experience with TypeScript and Node.js (our primary stack), or willingness to work extensively in this environment.
  • Experience with AI in developer tooling or internal systems.
  • Familiarity with agentic systems or orchestration frameworks.
  • Experience with production systems (performance, reliability, scalability).

  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:

  • B2B contract-based monthly remuneration is 38.000 - 45.000 PLN + VAT or its equivalent on the employment contract.
  • Flexible schedule and the possibility to work fully remotely.
  • Professional development resources (up to 5 days of additional leave and 6 000 PLN yearly).
  • 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.

  Recruitment process

  • HR interview.
  • Technical interview with Senior Director of Engineering.
  • Paid task – a practical assignment reflecting real challenges you may encounter in this role.
  • Solution review discussion – a conversation about your approach, decisions, and trade-offs in the task.

  Apply now

  Contact person

  Anna Cichaa.cicha@cksource.com

  Location

  RemoteWarsawPoznań

  Employment type

  Contract of EmploymentB2B

  Salary

  B2B:(net fv)

  38 000 - 45 000 PLN

  Contact of Employment:(gross)

  equivalent of B2B

  Skills

  JavaScriptTypeScriptEnglishAI

  Apply now

• Senior Solutions Engineer

  RemoteWarsawPoznań

  18 000 - 25 000 PLN

  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.

  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 New Role

  As part of a portfolio of best-in-class developer tools, we are looking for a Senior Solution Engineer who will become the technical bridge between our products and our customers. You will work closely with the sales team, supporting the entire customer journey – from pre-sales discovery through onboarding to ongoing technical success.

  The perfect candidate combines strong technical skills with a natural ability to build relationships, communicate complex concepts clearly, and think in terms of customer value.

  As a Senior Solution Engineer, you will be the technical face of our products – helping customers understand, adopt, and get the most out of CKEditor products.

  You’ll have strong support from experienced team members who will introduce you to our products and processes during onboarding. We know how important the first days in a new job are, so we will make sure that you will have time to learn about our technology, ecosystem, and how we work 🙂

  Key Responsibilities

  • supporting the sales team in pre-sales calls by providing technical expertise, answering prospect questions, and addressing technical concerns;
  • preparing and delivering tailored product demos based on customer requirements and specific use cases;
  • conducting technical support calls and providing L1 technical support to customers;
  • running customer onboarding sessions to ensure smooth adoption of our products;
  • preparing technical documentation, integration guides, and product briefs for the sales team;
  • building and maintaining relationships with customers, proactively engaging to ensure their success;
  • collecting customer feedback and translating it into actionable insights for the product and GTM teams;
  • creating and maintaining a knowledge base – playbooks, ready-made solutions, FAQs, and best practices;
  • writing workarounds, simpler implementations, and integration examples for customers;
  • continuously deepening your technical knowledge of our products and the broader ecosystem.

  To Be Successful in This Role You Need the Following

  • 4+ years of experience in a customer-facing technical role (Solution Engineer, Sales Engineer, Pre-Sales Engineer, Technical Account Manager, or similar);
  • strong communication, storytelling, and active listening skills;
  • solid practical knowledge of JavaScript/TypeScript and web technologies (required);
  • good understanding of how web applications work (front-end, back-end, REST APIs, integrations);
  • hands-on experience with API testing and debugging tools (e.g. Postman, browser DevTools);
  • practical experience with AI-powered tools and LLM-based solutions — you understand how AI features work under the hood (prompts, models, context windows, embeddings) and can confidently discuss them with technical and non-technical stakeholders;
  • practical understanding of cloud infrastructure and deployment environments (Docker, AWS, Azure, GCP) — enough to understand customer setups and support their integration scenarios;
  • proven ability to deliver technical presentations and product demos to both technical and non-technical audiences;
  • a customer-oriented mindset with the ability to translate technical capabilities into business value;
  • ability to manage multiple customers and projects simultaneously;
  • good English communication skills (C1+).

  Nice to Have

  • familiarity with CMS platforms, rich text editors, or content management ecosystems;
  • experience with Salesforce;
  • projects portfolio on GitHub;
  • experience creating technical documentation or contributing to knowledge bases.

  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:

  • B2B contract-based monthly remuneration is 18 000 PLN - 25 000 PLN + VAT;
  • quarterly and annual financial bonuses depending on the company’s performance;
  • flexible schedule and the possibility to work fully remotely;
  • professional development resources (up to 5 days of additional leave and 6 000 PLN yearly);
  • 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;
  • 26 days of paid vacation days for our contractors.
  • 2 weeks of paid parental leave for our contractors.

  What is next

  • Screening call - a Zoom call with the HR team to get to know each other, discuss your experience, and answer your questions about the role and the company;
  • Technical interview - a conversation with Kacper Tomporowski (Engineering Manager) and Filip Tokarski (Senior Solution Engineer) to assess your technical knowledge, understanding of web technologies, and ability to translate complex concepts into clear explanations;
  • Sales skills & stakeholder fit - a meeting with Rafał Stalewski (Head of Sales), Ludwika Słowikowska (Head of Customer Success), and Wojciech Cichoń (Senior Product Marketing Manager) to evaluate your communication style, customer-facing skills, and how you approach pre-sales scenarios and stakeholder management;
  • Practical task & presentation - a short take-home assignment followed by a live presentation, simulating a real customer demo or technical walkthrough based on a given use case.

  Apply now

  Contact person

  Maja Woszczykm.woszczyk@cksource.com

  Location

  RemoteWarsawPoznań

  Employment type

  Contract of EmploymentB2B

  Salary

  B2B:(net fv)

  18 000 - 25 000 PLN

  Contact of Employment:(gross)

  equivalent of B2B

  Skills

  storytellingcommunicationJavascriptTypescriptAPIAIcustomer-oriented mindset

  Apply now

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