Senior Payments Infrastructure Engineer — Crypto, Wallets & Blockchain

OleOle is building a global social network and messaging platform for football fans. The Senior Payments Infrastructure Engineer will complete integration, testing, and production deployment of its payments backend, including payment processing, settlement, wallet integrations, reconciliation, and transaction monitoring.

Responsibilities:

• We are seeking a hands-on Senior Payments Infrastructure Engineer to take ownership of an existing payments backend and complete its integration, testing, and production deployment
• Responsibilities include completing payment processing and settlement functionality, implementing transaction reconciliation, managing wallet integrations, ensuring accurate balance accounting, and building reliable transaction recovery and monitoring systems
• The engineer will integrate existing financial services using REST and gRPC, troubleshoot distributed systems, complete end-to-end testing, and ensure the infrastructure is secure, scalable, and production-ready

Requirements:

• 8+ years of professional backend engineering experience, including significant hands-on responsibility for production financial systems, payment infrastructure, cryptocurrency platforms, or digital asset services
• Proven experience building and operating financial transaction systems involving payment processing, settlement, reconciliation, and balance management
• Strong understanding of double-entry accounting and financial ledger architecture, including transaction consistency, idempotency, auditability, and failure recovery
• Production experience with digital wallets and cryptocurrency payments, including deposits, withdrawals, transfers, transaction signing, and secure key management
• Experience integrating Fireblocks or comparable institutional custody platforms, including custody APIs, wallet administration, transaction authorization, and security policies
• Advanced proficiency in Rust, Go, or another high-performance backend language, with demonstrated ability to work in Rust-based microservices
• Expertise in distributed systems, including REST, gRPC, asynchronous processing, concurrency, fault tolerance, and event-driven architectures
• Strong database engineering experience, including PostgreSQL or comparable transactional databases, ACID guarantees, concurrency control, and data integrity
• Production experience with AWS, Docker, CI/CD, monitoring, and infrastructure security, including deploying and troubleshooting mission-critical services
• Deep understanding of blockchain transaction infrastructure, cryptographic signing, wallet architecture, and secure digital asset transfers
• Experience integrating third-party financial services, including payment gateways, banking APIs, fiat on/off ramps, or cryptocurrency exchanges
• Strong security engineering knowledge, including encryption, access controls, secrets management, transaction authorization, and financial-system security practices
• Demonstrated ability to independently own complex production systems, investigate unfamiliar codebases, resolve integration problems, and deliver reliable infrastructure without unnecessary redesign
• Experience with automated integration and end-to-end testing for financial transactions, including duplicate processing, partial failures, reconciliation discrepancies, and recovery scenarios
• Strong technical documentation and communication skills, with demonstrated experience collaborating across backend, infrastructure, blockchain, and financial engineering teams
• Creative problem solver who can courageously propose and support new ideas to our organization. Not interested in best practices, lets build something better!
• Ability to adapt. An ideal candidate will welcome the opportunity to solve a broad range of problems using a wide array of technologies
• Comfortable with ambiguity, shifting priorities and general growing pains of an early-stage technology company
• An exceptional entrepreneurial judgment that fosters independence over micro-management
• Direct production experience with Fireblocks and TigerBeetle
• Hands-on Rust development in financial or high-throughput distributed systems
• Experience with Solana, SPL tokens, and blockchain wallet integrations
• Experience building cryptocurrency exchanges, payment orchestration platforms, custody infrastructure, or treasury systems
• Familiarity with KYC/AML, PCI DSS, and financial services compliance requirements
• Evidence of personally engineering and deploying financial infrastructure handling real customer funds at production scale
• Understanding of football and international sports a huge plus