Senior Software Engineer, Fiat Payments & Banking Infrastructure
About the Job
zerohash is looking for a Senior+ Software Engineer to architect and build our fiat payment systems, scaling our gateway to Finance 2.0. We are a high-performing team looking for an equally ambitious and driven teammate. The right candidate for this position is detail-oriented, deeply technical, and driven by the challenges of complex financial systems. You are eager to build secure, resilient, and highly scalable banking infrastructure. If you are looking to have a massive impact in a high-growth startup bridging the gap between traditional finance and digital assets, you will find this role uniquely challenging and rewarding.
Role Objectives & Focus
This senior-level role focuses intensely on the backbone of our financial infrastructure:
-
Fiat Payments: Building and maintaining robust fiat rails such as ACH, RTP, FedNow, RFP in the US, and SEPA in Europe.
-
Banking Infrastructure: Direct API integrations with top-tier banking partners.
-
Treasury Management: Developing sophisticated software to autonomously manage and reconcile balances across banking networks.
-
Operational Tooling: Creating internal tooling to streamline financial operations and scale our capacity to handle millions of transactions securely.
Responsibilities
- Lead the architectural design and hands-on development of our global fiat payment rails (ACH, RTP, FedNow, Request for Pay, and SEPA).
- Architect, implement, and scale seamless API integrations into our banking partners' systems.
- Design and build robust treasury management software for internal operations, allowing programmatic liquidity management and automated balance transfers between partner banks.
- Develop robust internal operational tooling to support reconciliation, automated alerts, financial operations, and compliance reporting.
- Support the company's vital business by contributing to the design and development of software in an event-driven microservices environment.
- Develop microservices, primarily utilizing Golang.
- Work closely with platform engineers to set up new services and scale existing infrastructure.
- Respond to production issues and alerts, ensuring high availability of our payment gateways.
- When necessary, communicate directly with banking partners and client technical teams to resolve complex integration issues.
Requirements
- 7+ years of software engineering experience, specifically focused on Payments, FinTech, or Banking-as-a-Service (BaaS) infrastructure.
- Deep proficiency with Golang in a production environment.
- Extensive understanding of traditional fiat networks and clearing systems (e.g., ACH, RTP, FedNow, SEPA, Swift).
- Strong expertise in SQL and complex database schema design for high-throughput, ACID-compliant financial ledgers.
- Hands-on experience developing, integrating, and maintaining resilient connections with bank APIs and third-party payment processors.
- A humble and scrappy get-it-done mindset; you're resourceful and in your element going from 0 to 1.
- Excellent problem-solving skills; you can systematically troubleshoot complex distributed systems.
- Comfort with ambiguity; the ability to independently lay out and test clear hypotheses, and solve architectural problems without well-defined direction.
- Excellent verbal and written communication skills.
Preferred Qualifications
- Bachelors in Computer Science or equivalent experience.
- Experience at a banking-as-a-service, brokerage-as-a-service, or payment-as-a-service business.
- Proven track record of building treasury management or automated ledgering systems from scratch.
- Experience with digital assets and crypto infrastructure.
- Experience with distributed systems design and messaging frameworks (e.g., Kafka, ZeroMQ, or NATS) for data distribution and persistence.
Benefits
- Healthcare Insurance: zerohash covers roughly 100% of employee premiums as well as a portion of spouse/children (U.S. only)
- Vision & Dental