Senior Payments Infrastructure Engineer — Crypto, Wallets & Blockchain

Travoom•Austin, TX

About The Position

OleOle is 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 works with Rust-based microservices, financial ledgers, digital wallets, cryptocurrency transactions, Fireblocks custody infrastructure, and fiat payment integrations. The engineer will complete payment processing and settlement functionality, implement transaction reconciliation, manage wallet integrations, ensure accurate balance accounting, and build reliable transaction recovery and monitoring systems. They 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. The position is intended for an entrepreneurial, startup-minded engineer comfortable with an early-stage company, uncertain funding timelines, ambiguity, and shifting priorities. Compensation is agreed upon and deferred until funding is secured; then it transitions to a competitive, normalized salary plus equity and OleX token ownership. The role requires some travel. OleOle is located in Austin, Texas.

Requirements

At least 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.
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, including experience collaborating across backend, infrastructure, blockchain, and financial engineering teams.
Ability to adapt, work through ambiguity and shifting priorities, and solve a broad range of problems using varied technologies.
Some travel is required.

Nice To Haves

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.

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 and ensure accurate balance accounting.
Manage digital wallet integrations.
Build reliable transaction recovery and monitoring systems.
Integrate existing financial services using REST and gRPC.
Troubleshoot distributed systems and complete end-to-end testing.
Ensure payment infrastructure is secure, scalable, and production-ready.
Independently understand an existing codebase, resolve integration challenges, and deliver production-ready financial infrastructure without unnecessarily rebuilding completed systems.