Research Scientist, Kaggle
Google (10000+ pracowników)
Programowanie Frontend
Programowanie Backend
Poland
Pełny etat
Law
Doctoral degree
Java
Master's degree
C++
JavaScript
Natural language processing
AI
Python
Mobile devices
Crypto Developer
ALOIS TECHNOLOGIES SPÓŁKA Z OO
Cyberbezpieczeństwo
Programowanie blockchain
Just Join IT
Warsaw(Poland)
Hybrydowo
Mid
27,300 - 31,500 PLN / miesiąc
Java
Angular
Blockchain
crypto
FinTech
Payments
API
Bitcoin
📍 Warsaw, Poland | Hybrid | B2B Contract | English-speaking environment
🌐 The Opportunity
Build blockchain and crypto products for a global payments technology leader whose platforms process real-time transactions for millions of businesses and consumers worldwide. This role suits a senior engineer who wants to work at genuine global scale, where security, resilience and performance are non-negotiable.
🛠 What You'll Do
Design, build and maintain enterprise-grade crypto and blockchain products
Develop scalable distributed systems: APIs, orchestration layers and third-party integrations
Build and enhance backend services in Java, collaborating with frontend teams on Angular
Own delivery end-to-end, from architecture and design through deployment and production support
Drive monitoring, alerting and high availability for mission-critical services
Implement CI/CD pipelines, testing frameworks and secure engineering standards
✅ What You'll Bring
12+ years' experience with a Bachelor's degree, or 8+ years with an advanced degree (Master's, MBA, etc.)
Strong background building high-performance distributed systems and APIs
Deep knowledge of blockchain technologies: public and permissioned chains, DeFi, distributed ledgers (Bitcoin, Ethereum, Hyperledger)
Hands-on Solidity, EVM and Assembly experience
Solid grasp of security protocols and private key custody
Full Secure SDLC experience: version control, CI/CD, unit and performance testing
⭐ Strongly Preferred
Full-stack experience: Java backend + Angular frontend
Payments, fintech or financial services domain knowledge, including compliance and payment processing flows
💡 Why Join
Work on payments infrastructure used worldwide every day, where milliseconds matter
Build blockchain products inside a global financial leader, a rare combination on any CV
Collaborate with senior international engineering teams in a hybrid Warsaw setup
👉 Apply now. Shortlisted candidates will hear from our team within 48 hours.