Senior Software Engineer, Payments
Our mission The trucking and logistics industry provides the backbone of the economy. But the payments infrastructure on which it runs is broken.
What this role actually needs.
Our mission The trucking and logistics industry provides the backbone of the economy. But the payments infrastructure on which it runs is broken. 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. Requirements: - 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. Company context: AtoB builds fintech and logistics software with current hiring across platform, product, engineering, and operations systems.
Day-to-day expectations
AtoB lists these responsibilities for the Senior Software Engineer, Payments role.
- 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.
What a strong candidate brings
These requirements are extracted from the source listing and normalized for UpJobz readers.
- 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.
Why this listing is more than a copied job post.
Senior Software Engineer, Payments is framed against UpJobz source checks, country scope, compensation visibility, and work-authorization signals so candidates can make a faster go/no-go decision.
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Source: jobs.ashbyhq.com · Source ID: 523e5c4e-4c2d-495c-a50a-3535652158c9 · Confidence: 88/100 · Last checked: May 7, 2026
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