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Zero Hash

Senior Software Engineer – Fiat Payments, Banking Infrastructure

Zero Hash

. Lead the architectural design and hands-on development of our global fiat payment rails (ACH, RTP, FedNow, Request for Pay, and SEPA).

Posted 5/22/2026full-timeRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies
Distributed SystemsGoMicroservicesRuby on RailsSQLSwift

About the role

Key responsibilities & impact
  • 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

What you’ll need
  • 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.

Benefits

Comp & perks
  • Healthcare Insurance: zerohash covers roughly 100% of employee premiums as well as a portion of spouse/children (U.S. only)
  • Vision & Dental Insurance (U.S. only)
  • Chance to earn equity
  • Maternity & Paternity leave (after 6 months)
  • WeWork All Access Membership
  • WFH Yearly Stipend
  • L&D Yearly Stipend (after 6 months)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
GolangSQLAPI integrationsmicroservicestreasury management softwarefinancial operationsreconciliationautomated alertscomplex database schema designACID compliance
Soft Skills
problem-solvingcommunicationresourcefulnessadaptabilityindependencetroubleshootingmindsetcomfort with ambiguity