Senior Software Engineer, Full Stack
About the role
Senior Software Engineer, Full Stack responsible for leading ambiguous technical projects, designing and building APIs and user-facing experiences, and shaping scalable architecture for a FinTech/payments SaaS product in a hybrid office setting in SF Bay Area or NYC.
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.
Qualifications
- 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
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of the economy, but the payments infrastructure on which it runs is broken; the existing suite of payment tools is outdated, difficult to use, prone to fraud, and saddled with hidden fee structures.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.
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