Senior Software Engineer, Full Stack
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 for often ambiguous technical projects, laying the groundwork for early-stage products to iteratively evolve and scale. - Design, build, and maintain APIs, user-facing experiences, services, and systems. - Make effective tradeoffs between business priorities, user experience, and reliability. - Work with critical frontend, 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. Requirements: - Have 5+ years of professional experience building B2B or B2C SaaS products (FinTech, payments, or marketplace a plus). - Thrive in zero-bureaucracy, high-ownership environments. - Balance speed with rigor—automated tests, clean abstractions, clear docs. - Can participate in architecture discussions and still 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 New York 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, Full Stack role.
- Lead efforts for often ambiguous technical projects, laying the groundwork for early-stage products to iteratively evolve and scale.
- Design, build, and maintain APIs, user-facing experiences, services, and systems.
- Make effective tradeoffs between business priorities, user experience, and reliability.
- Work with critical frontend, 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.
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).
- Thrive in zero-bureaucracy, high-ownership environments.
- Balance speed with rigor—automated tests, clean abstractions, clear docs.
- Can participate in architecture discussions and still 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 New York
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Senior Software Engineer, Full Stack 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: ec910c6d-a98a-4cdd-bc5c-beabb69f4823 · Confidence: 88/100 · Last checked: May 7, 2026
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