🇵🇱 Warsaw, Poland · 18h ago
Mid-Senior Crypto & Blockchain Developer
ALOIS Solutions
LinkedInseniorEnglish-friendly
About the role : We are looking for an experienced Crypto & Blockchain Developer to join our team and build scalable, secure, enterprise-grade solutions across blockchain, digital payments, and financial services. Key ResponsibilitiesDesign and develop high-performance blockchain and crypto-based products.Build scalable distributed systems, APIs, orchestration layers, and third-party integrations.Develop robust backend services using Java and modern engineering practices.Collaborate with frontend teams using Angular to deliver seamless user experiences.Work across the complete SDLC including architecture, development, testing, CI/CD, deployment, and production support.Ensure security, high availability, monitoring, and performance of enterprise applications.Troubleshoot complex technical challenges and drive continuous improvement.Collaborate with stakeholders across payments, fintech, and financial services. Key Skills & Experience8+ years of relevant experience with an advanced degree OR 12+ years of experience with a Bachelor's degree.Strong experience in Java, distributed systems, APIs, microservices, and high-availability applications.Hands-on knowledge of Blockchain, Crypto, DeFi, Distributed Ledgers, and Web3.Strong understanding of Bitcoin, Ethereum, Hyperledger, Solidity, EVM, and smart contracts.Experience with private key custody and blockchain security protocols.Strong knowledge of CI/CD, version control, unit testing, and performance testing.Experience in payments, payment processing, fintech, or financial services.Angular / full-stack development experience is highly preferred.Strong problem-solving, communication, stakeholder management, and leadership skills.Sourced from LinkedIn. Relocantly aggregates public job postings; apply on the original site.