Senior Payments Infrastructure Engineer – Crypto, Wallets & Blockchain
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Job Description
Senior engineer completing secure crypto payments, wallets, ledgers, and blockchain infrastructure for OleOle’s global football fan platform. Deploying and operating production-ready financial systems.
Responsibilities:
- Take ownership of the existing payments backend and complete its integration, testing, and production deployment
- Complete payment processing and settlement functionality
- Implement transaction reconciliation
- Manage digital wallet integrations
- Ensure accurate balance accounting
- Build reliable transaction recovery and monitoring systems
- Integrate existing financial services using REST and gRPC
- Troubleshoot distributed systems
- Complete end-to-end testing
- Ensure infrastructure is secure, scalable, and production-ready
- Independently understand the existing codebase, resolve integration challenges, and deliver production-ready financial infrastructure
- Collaborate across backend, infrastructure, blockchain, and financial engineering teams
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
- Advanced proficiency in Rust, Go, or another high-performance backend language, with demonstrated ability to work in Rust-based microservices
- Expertise in distributed systems, 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
- 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 experience collaborating across backend, infrastructure, blockchain, and financial engineering teams
- Direct production experience with Fireblocks and TigerBeetle highly preferred
- Hands-on Rust development in financial or high-throughput distributed systems highly preferred
- Experience with Solana, SPL tokens, and blockchain wallet integrations highly preferred
- Experience building cryptocurrency exchanges, payment orchestration platforms, custody infrastructure, or treasury systems highly preferred
- Familiarity with KYC/AML, PCI DSS, and financial services compliance requirements highly preferred
- Understanding of football and international sports is a huge plus
Benefits:
- Deferred compensation until funding is secured
- Competitive, normalized salary plus equity after funding is secured
- OleX token ownership after funding is secured
- Participation in the company's long-term ownership and success
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