Mid-Senior Crypto Developer

Quick Facts

• Role: Mid-Senior Crypto Developer

• Location: Warsaw, Poland (Hybrid: 1–3 days per week onsite)

Description

We are seeking experienced Mid-Senior Crypto Developers to build enterprise-grade cryptocurrency, blockchain, and digital payments solutions in Warsaw. The role combines strong software engineering with hands-on blockchain knowledge, distributed systems, and secure application development.

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 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 performance and scalability

• Stay current with blockchain, cryptocurrency, and financial-technology developments

Requirements

• Hybrid work in Warsaw (1–3 days per week onsite) and comfort completing a coding assessment

• 12+ years of work experience with a Bachelor’s degree OR 8+ years with an advanced degree (Master’s/MBA/JD/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

• Secure Software Development Lifecycle experience: version control, CI/CD, unit testing, performance testing

• Strong understanding of blockchain technologies (public and permissioned)

• Understanding of DeFi applications and blockchain security protocols

• Knowledge of private-key custody and distributed ledgers

• Experience/knowledge with Bitcoin, Ethereum, and Hyperledger

• Strong understanding of Solidity, Assembly, and EVM technologies

• Payments/financial services experience: payments ecosystems, payment-processing flows, compliance

• Strong communication, facilitation, and leadership skills

Benefits

Not specified in the provided posting.