Mid/ Senior Crypto Developer

Mid-Senior Crypto Developer

Location: Warsaw, Poland Work Model: Hybrid - 1-3 days per week onsite Contract: Contract

Dcv/wp/vs/29.09.28

About the Role

We are looking for experienced Mid-Senior Crypto Developers to join a technology team in Warsaw, working on enterprise-grade cryptocurrency, blockchain and digital payments solutions.

The role combines strong software engineering with hands-on knowledge of blockchain technologies, distributed systems and secure application development. Send Cv to marcillina.tietjen@dcvtechnologies.co.uk if you are interested

Key Responsibilities

• Design, develop and maintain enterprise-grade crypto and blockchain-based products.
• Build scalable, high-performing distributed systems, APIs and orchestration layers.
• Develop and maintain third-party integrations.
• Drive end-to-end software development from architecture and design through deployment and production support.
• Develop and enhance backend services using Java and modern engineering practices.
• Collaborate with frontend teams using Angular.
• Ensure application security, reliability, monitoring and high availability.
• Implement and maintain CI/CD pipelines, testing frameworks and software quality standards.
• Work with cross-functional stakeholders on digital payments and financial-services solutions.
• Troubleshoot complex technical issues and continuously improve system performance and scalability.
• Stay current with blockchain, cryptocurrency and financial-technology developments.

Key Requirements

• 12+ years of work experience with a Bachelor's degree OR 8+ years of relevant experience with an advanced degree such as a Master's, MBA, JD or MD.
• Strong experience building scalable, high-performing distributed systems.
• Experience with APIs, orchestration layers and third-party integrations.
• Strong understanding of monitoring, alerting and high-availability environments.
• Strong experience across the Secure Software Development Lifecycle, including:
• Version control
• CI/CD
• Unit testing
• Performance testing
• Strong understanding of blockchain technologies, both public and permissioned.
• Understanding of DeFi applications and blockchain security protocols.
• Knowledge of private-key custody and distributed ledgers.
• Experience/knowledge across technologies such as Bitcoin, Ethereum and Hyperledger.
• Strong understanding of Solidity, Assembly and EVM technologies.
• Experience within payments and financial services, including payments ecosystems, payment-processing flows and compliance.
• Strong communication, facilitation and leadership skills.

Highly Preferred

• Blockchain, crypto, fintech or payments domain experience.
• Backend development using Java.
• Frontend development using Angular.
• Full-stack software development experience.

Important

Candidates must be able to work hybrid in Warsaw, 1-3 days per week onsite and be comfortable completing a coding assessment as part of the recruitment process.