Senior Back End (Blockchain) Engineer

Ciklum is looking for a Senior Back End (Blockchain) Engineer to join our team full-time in the Czech Republic.

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 Back End (Blockchain) Engineer, become a part of a cross-functional development team engineering experiences of tomorrow.

About the project: Take a position in building and maintaining Client’s blockchain management platform. You’ll be responsible for building cutting-edge blockchain infrastructure while implementing high-throughput, real-time scalable software solutions.

As a Back End Blockchain Engineer, you will be instrumental in the research and integration of blockchain technologies into the Client’s platform. Your responsibilities will include collaborating closely with foundations and developers to gain a deep understanding of blockchain protocols and on-chain projects, then applying that knowledge to implement new features within the platform.

You will focus equally on external protocol integration patterns and internal wallet infrastructure. This role serves as a technical bridge between raw on-chain capabilities and the wallet features delivered to customers.

Responsibilities:

• Implement modern backend applications and infrastructure in a microservices architecture, using the latest technologies and development practices
• Deep dive into the latest blockchain technology and become an expert in the fundamentals, protocols, and features of the chains we support
• Collaborate effectively with developers, engineers, and other roles while demonstrating strong independent problem-solving abilities
• Contribute to production reliability through on-call participation, incident response, and post-incident follow-ups

Requirements:

• 5+ years of backend development experience in modern languages (Go, Python, JavaScript/TypeScript)
• 3+ years of hands-on blockchain development experience
• Experience working on high-scale distributed systems
• Understanding of microservices architecture and API design
• Knowledge of consensus mechanisms, cryptographic primitives, and distributed systems
• Strong problem-solving skills and attention to detail
• Strong verbal and written communication skills and a collaborative mindset
• Experience building blockchain solutions for enterprise or institutional use cases
• Understanding of security best practices for smart contracts and blockchain systems
• Demonstrated ability to apply AI tools in day-to-day development
• Understanding of MPC, multi-signature wallets, or other advanced cryptographic techniques
• Bachelor’s degree in Computer Science, Engineering, or a related field
• Experience with Docker, Kubernetes, and Helm

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.

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