Skip to content

Principal Applied AI Engineer

  • Remote
    • Warsaw, Poland
  • PLN 38,000 - PLN 45,000
  • Engineering

Job description

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.

Job requirements

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

  1. HR interview.

  2. Technical interview with Senior Director of Engineering.

  3. Paid task – a practical assignment reflecting real challenges you may encounter in this role.

  4. Solution review discussion – a conversation about your approach, decisions, and trade-offs in the task.

or