We are looking for a Senior Solution Architect to design and oversee the technical architecture for a comprehensive blockchain platform, including stablecoin infrastructure, custodial wallet systems, and crypto-acquiring capabilities. You'll architect enterprise-grade solutions with a focus on security, scalability, and regulatory compliance across diverse blockchain ecosystems and wallet architectures. Thank you for your interest in this position. Please note that only candidates whose experience closely matches the job requirements will be contacted. If you do not receive an email from us, please do not be discouraged—feel free to apply for other positions that better align with your experience. If you have any questions, you can reach us at jobserbia@epam.com Responsibilities Design a comprehensive blockchain infrastructure supporting private EVM networks with enterprise performance Architect, create, and refine scalable and resilient backend infrastructure for multi-chain wallet solutions, supporting various custody models, including traditional custodial, multisig, MPC, and account abstraction implementations Define and refine key lifecycle management practices, including backup strategies, rotation policies, and access control frameworks for various wallet types Architect security frameworks for digital asset custody with advanced key management solutions and keyless architectures Design an API-first approach with integration for banking systems and fintech services across different wallet paradigms Participate in security reviews and provide expert guidance on incident response plans, technical decisions, and secure operational workflows Oversee and facilitate key ceremonies and ensure proper governance is established for long-term technical decision-making Review and refine access control mechanisms and provide recommendations for system upgrades and updates Design hybrid deployment strategies for cloud and on-premise environments using Kubernetes Ensure wallet architecture and operations are compliant with financial regulations such as KYC/AML, PSD2, and GDPR when applicable Implement monitoring and alerting systems for blockchain nodes and transaction processing Lead a team of technology subject matter experts and take full ownership of technology programs Work closely with product, business, and engineering stakeholders, ensuring responsibility for the final product Maintain SME-level proficiency in technology, particularly blockchain domains Requirements Extensive solution architecture experience with a significant background in blockchain/digital asset platforms Advanced experience with blockchain custody infrastructure and enterprise wallet architecture across custodial, multisig, and MPC solutions Understanding of account abstraction concepts and keyless wallet architectures Deep understanding of diverse blockchain protocols and ecosystems with knowledge of rollups and sidechains Experience deploying, configuring, and upgrading blockchain nodes and validators Hands-on experience with smart contract development (Solidity, Rust), role-based access control, and upgradeable proxy patterns Experience with cross-chain bridging, multi-chain integrations, and wallet interoperability Familiarity with consensus mechanisms (PoW, PoS, DPoS, BFT, etc.) Experience with blockchain monitoring tools (BlockScout, Prometheus exporters, Grafana dashboards) Knowledge of smart contract deployment workflows and integration with DevOps pipelines Understanding of private/public blockchain network setups, permissioned networks, and cross-chain communication Experience with blockchain security best practices (key management, secure RPC endpoints, DDoS protection) Deep understanding of enterprise security frameworks and cryptographic protocols Experience with microservices architecture, API design, and enterprise integration patterns Knowledge of cloud and on-premise infrastructure design (AWS, GCP, Kubernetes) English proficiency at B2 level or higher Nice to have AWS Solution Architect or Kubernetes Administrator certifications Experience with Hyperledger Besu or enterprise blockchain platforms Experience mentoring teams and supporting ecosystem adoption Background in financial services architecture and payment processing systems Experience conducting security reviews for financial institutions Hands-on experience with account abstraction implementations
