Software Engineer: Backend

About the role

About Thatch

For most people, health insurance is something that happens to them: a plan chosen by someone else, with little room to fit their life. Thatch is changing that. We help companies give every employee a real healthcare budget instead of a one-size-fits-all plan, so people can choose the coverage and care that works for them, and employers get predictable costs they can control.

It’s a simple idea, but making it real means solving hard problems across healthcare, payments, and technology, and we’re just getting started. We look for people who like solving complex problems, use good judgment, and are comfortable working through ambiguity. People here care deeply about our customers, take real responsibility for what gets built, and are driven by doing work that matters.

About the role

Thatch is rewiring how health benefits work. We build software that gives employees real control over how they use their benefits.

We’re looking for a Backend Software Engineer to design and build the core systems that power Thatch. This includes data models, fund flows, automations, and integrations that make healthcare benefits work reliably at scale. Your work ensures money moves correctly, benefits remain compliant, and complex processes work reliably. This work touches real money and real healthcare decisions. The systems you build must be correct, resilient, and built to scale.

We organize engineering around the people we serve: members, employers, and partners, so teams own end-to-end experiences and ship with speed and accountability.

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.

We hire engineers across multiple levels and care most about the scope you’ve owned, the impact you’ve had, and how you make decisions.

Tools and tech stack

- Ruby on Rails for backend systems.