Senior Payments Infrastructure Engineer - Crypto, Wallets & Blockchain

Job Description

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.

The role involves working with Rust-based microservices, financial ledgers, digital wallets, cryptocurrency transactions, Fireblocks custody infrastructure, and fiat payment integrations.

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.

Strong experience with backend engineering, financial transaction systems, distributed architecture, and cryptocurrency payments is essential. Experience with Rust, Fireblocks, TigerBeetle, Solana, AWS, and institutional wallet infrastructure is highly desirable.

The ideal candidate can independently understand an existing codebase, resolve integration challenges, and deliver production-ready financial infrastructure without unnecessarily rebuilding completed systems.

Qualifications

• 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.

Highly Preferred

• 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.

Additional Information

Solutions not problems .

• 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
• Understanding of football and international sports a huge plus

Deferred compensation

This opportunity is designed for entrepreneurial, startup-minded engineers who want to help build a significant global business. This is not free work. Compensation is agreed upon and deferred until funding is secured, at which point it transitions to a competitive, normalized salary plus equity and OleX token ownership. Our entire team, including the founder, operates under this arrangement. This position is intended for individuals who understand the risks of an early-stage startup, are comfortable with uncertain funding timelines, and are motivated by the opportunity to build something substantial while participating in its long-term ownership and success.

Ole Ole is located in beautiful Austin Texas, however, this role requires some travel we are privately held and rapidly growing!