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Senior Software Engineer, Payments

AtoB· Engineering
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Hybrid (San Francisco Bay Area), Hybrid (Montreal)$150k - $190k + equityFull-timePosted 11mo ago

About the role

Senior software engineer focused on payments infrastructure, ledger reconciliation, and money movement flows for a FinTech serving trucking and logistics. Builds scalable backend systems, collaborates with external ledgers and multiple payment rails, and ensures alignment between internal records and customer-facing balances.

Responsibilities

  • Lead efforts to reconcile transactions across multiple financial providers, including Stripe, Highnote, Checkbook, and JPMorgan, ensuring accuracy and consistency across systems.
  • Ensure full alignment between internal records and customer-facing balances—what’s in the bank should precisely match what the customer sees.
  • Contribute to the development and ongoing scalability of our general ledger infrastructure, supporting accuracy, resilience, and growth.
  • Partner with our external ledger provider, Fragment, to build a reliable system capable of powering billions of transactions with speed and integrity.
  • Design and implement new money movement flows across a variety of payment rails—including push-to-card and wire transfers—optimizing for cost, speed, and reliability.
  • Own critical backend & platform projects end-to-end—from design to production ops.
  • Push architecture that scales to billions in annual payment volume and real-time risk controls.
  • Work closely with product and GTM leads to turn ambiguous problems into elegant code.

Qualifications

  • Have 5+ years of professional experience building B2B or B2C SaaS products (FinTech, payments, or marketplace a plus).
  • Prior payments or back office fintech experience is a plus
  • Thrive in zero-bureaucracy, high-ownership environments.
  • Balance speed with rigor—automated tests, clean abstractions, clear docs.
  • Can dive deep into code (we use React, Ruby, Postgres—but great engineers pick up tools fast).
  • Communicate crisply across time zones.
  • This role is required to be in office 4 days/week (Mon-Thurs) either in San Francisco Bay Area or Montreal

Skills

Required:Transaction reconciliationGeneral ledger infrastructureMoney movement designBackend developmentCommunication across time zones
Last updated Jul 29, 2026. Interested? Apply on the company site.
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About AtoB

Rebuilding global transportation payments.

The trucking and logistics industry provides the backbone of the economy, but the payments infrastructure on which it runs is broken; the existing suite of payment tools is outdated, difficult to use, prone to fraud, and saddled with hidden fee structures. AtoB is building Stripe for Transportation — modernizing the payments infrastructure for trucking and logistics, where capital movement occurs quickly and transparently. Our flagship product is the AtoB Fuel Card, a zero-fee fuel card accepted anywhere built for fleets of all shapes and sizes.

fintechsaaspaymentssupply-chaintransportation
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