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ThatchThatchSan Francisco, CA

Software Engineer: Backend

Builds backend systems for enrollments, payments, payroll, and benefits management using Ruby on Rails. Designs data models, fund flows, and integrations with payroll/banks/insurance partners, ensuring reliability and scalability in a regulated healthcare/finance domain.

161k – 230k/yr
RemoteBackend Engineering

About the role

What you'll do

  • Design, build, and evolve backend systems that support enrollments, payments, payroll, and benefits management.
  • Architect and maintain robust data models and fund flows that handle large volumes of financial transactions.
  • Build integrations with payroll providers, banks, insurance carriers, and other external partners.
  • Improve operational rigor through automation, tooling, monitoring, and observability.
  • Partner closely with product, operations, and other engineers to solve complex business problems.
  • Take ownership of production systems, including reliability, debugging, and long-term maintainability.

What we are looking for

  • Experience building and maintaining backend systems in a production environment.
  • A track record of shipping systems with complex business and operational implications.
  • Strong ability to reason about data models, workflows, and edge cases.
  • Comfort operating in ambiguous problem spaces with cross-functional tradeoffs.
  • Experience mentoring other engineers or setting technical direction.

Tools and tech stack

  • Ruby on Rails for backend systems.
  • React and TailwindCSS for the frontend.
  • Small amounts of Python and backend JavaScript where appropriate.

Experience that stands out

  • Work in healthcare, finance, or other complex or regulated domains.
  • Experience with HR, payroll, payments, or partner-facing systems.
  • Ownership of systems with real operational or financial impact.

Estimated Compensation Range

$161,000—$230,000 USD

Skills

Ruby on RailsReactTailwindPythonJavaScriptPostgresAWSDockerKubernetesRedis

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