We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.

About The Role

As a Senior Playful Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. You will join a long-term strategic partnership with a leading Danish company — a globally loved brand creating products and experiences that inspire generations of children and families worldwide. Our team is integrating a proprietary programming language that will power a unified platform across the client's entire product ecosystem. The product is already on the market and actively used by end-users. You will be developing new releases, improving the architecture, enhancing features, and ensuring that everything works without a hitch — because when kids play, there is no room for bugs. You will work within a large cross-functional team of around 25 Ciklum engineers alongside 50+ client-side designers, project managers, testers, and architects — collaborating closely to deliver a seamless and joyful user experience.

Responsibilities

Design and develop software features for a performance-critical, user-facing product
Rearchitect and create new product versions — improving existing functionality and introducing new capabilities
Integrate tech stacks across multiple client products onto a unified platform
Support and enhance the game flow to ensure a seamless, enjoyable, and bug-free user experience
Implement new features and game mechanics with a strong eye for quality and user interaction
Develop supporting tools, automation, and toolchains (linters, debuggers, build systems)
Analyze system constraints and optimize implementations for performance, memory, and concurrency
Collaborate closely with designers to translate product requirements into robust technical solutions
Participate in code reviews, technical discussions, and mentor mid-level engineers
Troubleshoot and improve existing functionality across a large, complex codebase

Requirements

Strong Python skills — production-quality code, not just scripting
Strong analytical and problem-solving skills — you think before you code
Experience working within large, complex codebases
A genuine feel for user experience quality — you notice when something is off
Strong debugging skills and a zero-tolerance mindset for bugs
Solid knowledge of Git version control
Strong self-management — able to drive tasks from design to delivery independently
Proficient in verbal and written English communication
Passion for building high-quality, clean code

Desirable

Experience with C, C++, or Rust
Familiarity with compiler design, ASTs, type systems, or optimization techniques
Knowledge of embedded systems or low-level memory management
Experience with LLVM, GCC, or other compiler frameworks
Experience with Docker
Mobile platform experience (touch input, camera, GPS, Bluetooth, push notifications)

What’s in it for you?

Flexible working hours
Home office option
5 weeks of holiday
5 sick days
Multisport Card
Meal allowance
Internal trainings including workshops and seminars
Paid certifications and technical as well as soft-skills training
Possibility to participate in international conferences
Fresh fruit, coffee, and a weekly company breakfast in the office
Loyalty bonus after 5, 10, 15 and more years with the company
Referral bonus programme
Corporate events including team building, outdoor activities, Christmas party, health week, summer ice cream, and more
Hybrid and remote working options available across our Czech offices in Prague, Hradec Králové, and Zlín

About Us

At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.

With delivery centers in Prague, Hradec Králové, and Zlín, our Czech team delivers end-to-end solutions across industries. Here, innovation thrives through collaboration, and every idea drives our partners' success.

Explore, empower, engineer with Ciklum!

Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.