Senior Payments Infrastructure Engineer – Crypto, Wallets & Blockchain

This is a fully remote position, open to applicants in Texas.

📋 Description

• Assume responsibility for the current payments backend and complete its integration, testing, and deployment to production.

• Finalize payment processing and settlement capabilities.

• Execute transaction reconciliation.

• Oversee digital wallet integrations.

• Guarantee precise balance accounting.

• Develop dependable transaction recovery and monitoring systems.

• Integrate existing financial services using REST and gRPC protocols.

• Diagnose issues in distributed systems.

• Conduct thorough end-to-end testing.

• Ensure that the infrastructure is secure, scalable, and ready for production.

• Independently comprehend the existing codebase, address integration challenges, and deliver a production-ready financial infrastructure.

• Collaborate effectively with backend, infrastructure, blockchain, and financial engineering teams.

⛳️ Requirements

• Over 8 years of professional experience in backend engineering, with significant hands-on involvement in production financial systems, payment infrastructure, cryptocurrency platforms, or digital asset services.

• Demonstrated experience in building and managing financial transaction systems that encompass payment processing, settlement, reconciliation, and balance management.

• Profound understanding of double-entry accounting and financial ledger architecture, focusing on 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.

• Familiarity with integrating Fireblocks or similar institutional custody platforms.

• Advanced skills in Rust, Go, or another high-performance backend language, with proven ability to work within Rust-based microservices.

• In-depth knowledge of distributed systems, REST, gRPC, asynchronous processing, concurrency, fault tolerance, and event-driven architectures.

• Strong database engineering background, including experience with PostgreSQL or similar transactional databases, ACID guarantees, concurrency control, and data integrity.

• Practical experience with AWS, Docker, CI/CD, monitoring, and infrastructure security.

• Comprehensive understanding of blockchain transaction infrastructure, cryptographic signing, wallet architecture, and secure digital asset transfers.

• Experience in integrating third-party financial services, including payment gateways, banking APIs, fiat on/off ramps, or cryptocurrency exchanges.

• Solid knowledge of security engineering, including encryption, access controls, secrets management, transaction authorization, and financial system security practices.

• Proven ability to independently manage complex production systems, investigate unfamiliar codebases, resolve integration issues, and deliver reliable infrastructure without unnecessary redesign.

• Experience with automated integration and end-to-end testing for financial transactions, covering duplicate processing, partial failures, reconciliation discrepancies, and recovery scenarios.

• Excellent technical documentation and communication skills, with a background in collaborating with backend, infrastructure, blockchain, and financial engineering teams.

• Direct production experience with Fireblocks and TigerBeetle is highly preferred.

• Hands-on experience in Rust development within financial or high-throughput distributed systems is highly preferred.

• Familiarity with Solana, SPL tokens, and blockchain wallet integrations is highly preferred.

• Experience in developing cryptocurrency exchanges, payment orchestration platforms, custody infrastructure, or treasury systems is highly preferred.

• Knowledge of KYC/AML, PCI DSS, and financial services compliance requirements is highly preferred.

• Understanding of football and international sports is a significant advantage.

🏝️ Benefits

• Deferred compensation until funding is secured.

• Competitive, normalized salary plus equity once funding is secured.

• OleX token ownership after funding is successfully secured.

• Involvement in the company's long-term ownership and success.