Middle/Senior Golang Engineer

We are looking for a Golang Developer to build our leading-edge fintech products. Don’t miss this opportunity to transform the payment landscape with a team of professionals. Then join our Wirex team! Who we are: At Wirex, we’re redefining how the world uses digital money . From launching the first crypto-enabled debit card to giving everyday users access to digital currencies and rewards , we’re making finance more accessible . With more than 6 million users across 130+ countries , Wirex is building a future where digital currency works for everyone . Type of Cooperation: B2B Contract. Location: Full remote (EU preferred, no sanctioned countries). As a team member, you’ll be involved in: Design, build, and maintain backend services using Go, focusing on high-performance, low-latency solutions for Web3 card payment processing. Develop and maintain smart contract integrations, including interactions with on-chain data and handling transaction flows between the blockchain and application layer. Create and manage APIs for interactions with the blockchain, payments infrastructure, and third-party services (e.g., Wirex B2B API, Ethereum, and other EVM-compatible chains). Implement efficient and secure transaction handling, with support for asynchronous transaction confirmations and a processing oracle to facilitate sequential transaction workflows. Develop services to support cross-chain token swaps, stablecoin transactions, and fund management across different chains. Implement secure data handling practices for sensitive financial data and user information, including encryption, authentication, and authorization protocols. Ensure high availability and reliability through monitoring, debugging, and troubleshooting issues in live environments, particularly around transaction and fund flows. Required Skills and Qualifications: 3+ years in Go development, with 1+ year in Web3 or blockchain projects. Understanding of blockchain fundamentals, especially Ethereum and EVM-compatible networks; experience with smart contracts, Ethereum nodes (Geth, Infura, etc.), and wallet integrations. Familiarity with financial transaction lifecycles, particularly in Web3 ecosystems, including token transfers, stablecoin transactions, and cryptocurrency wallet management. Proficient in RESTful API and gRPC service design and development; experience with API security and integration best practices. Proficient in working with both relational (MySQL), with a strong focus on data consistency and performance. Experience with containerized applications and Kubernetes for deployment in production environments; familiarity with managing Go microservices in Kubernetes. Understanding of cryptographic principles and experience implementing secure data storage and transmission solutions. Familiarity with cloud infrastructure (e.g., AWS, GCP, Azure) and CI/CD pipelines for Go applications. Good English for documentation, Ukrainian or Russian communication skills. Nice-to-Have Skills: Understanding of zk-rollups, sidechains, and Layer 2 scaling solutions. Experience with monitoring and observability tools to track service health, particularly for financial transaction systems. Experience with Infrastructure-as-Code tools (e.g., Terraform) and knowledge of automated deployment strategies for blockchain-related services. Benefit: Premium tariffs for Wirex product. Semi-remote work with flexible hours—work from home or office. Home office allowance. Virtual share options scheme after the probation period. Health insurance coverage after the probationary period. Generous vacation policy: 20 business days of paid leave. Paid sick leave, Birthday, and Anniversary leave. Length of Service Holidays. Engaging in online events for learning and enjoyment. PE accounting and support.