Senior Software Engineer, Platform APIs & Partner Developer Experience

Fair

Fair

Software Engineering
United States
USD 120k-185k / year + Equity
Posted on Mar 31, 2026

👉 Contract (1099) to hire

👉 Compensation: $120K – $185K base salary + 0.05% – 0.5% equity (No Visa Sponsorship)

👉 Location: Onsite strongly preferred in Phoenix, Arizona

The industry is broken. We're fixing it.

Auto warranties have been a racket for decades. Fine print designed to deny. Coverage that disappears when you need it most. Customers left holding a $4,000 repair bill they thought was covered. We built Fair Warranty because that's wrong, and because we know exactly how to do it better.

We're a Series A company with a working platform, a set roadmap, and real customers who trust us. Now we need engineers who can help us scale that trust: one API, one integration, one flawlessly delivered feature at a time. We're growing fast and expanding to Enterprise partners. The quality of what flows into engineering needs to match that ambition.

What you'll own

This isn't a role where you wait to be handed tasks. You'll own our partner facing platform end-to-end, the APIs our B2B partners depend on, the payment-adjacent workflows that have to work every single time, and the developer experience that determines whether partners choose us or walk away.

Concretely, that means:

  • Designing and shipping core backend services across pricing, payments-adjacent workflows, accounting/reconciliation, and partner integrations
  • Hardening our B2B API platform (REST + GraphQL) for real-world partner use: idempotency, versioning, webhook signing and replay, sandbox/production separation, rate limiting, abuse protection
  • Owning API contract design with a typesafe-by-default mindset. OpenAPI + codegen for REST, code-first schema for GraphQL, error contracts developers can actually trust
  • Building for operability. Instrumentation, alerting, dashboards, runbooks. If it goes sideways at 2am, we need to know before a partner does
  • Raising the quality bar through test coverage and CI gates that give real confidence at release time, not just green checkmarks
  • Handling sensitive data the right way. Security, privacy, and compliance are not afterthoughts here. SOC 2, access controls, audit logging. You take this seriously because we do
  • Improving how we work, not just what we ship. Better issue scoping, sharper estimates, cleaner release processes

Our stack

Node.js + TypeScript (NestJS), REST (OpenAPI + codegen), GraphQL (code-first + codegen), MySQL, AWS (ECS, EventBridge, Lambda, S3, SQS/SNS, SES), Git, CI/CD.

What you bring (Must haves)

  • 5+ years building and operating production backend services. Real users, real uptime requirements, real on-call lessons
  • Strong Node.js + TypeScript chops across APIs and backend business logic
  • Experience designing and maintaining external-facing APIs with backward compatibility and documentation that partners can rely on
  • Real fluency with API platform fundamentals: auth patterns (API keys, OAuth), idempotency, pagination, rate limiting, webhooks and event delivery
  • Solid relational database fundamentals. MySQL or Postgres, schema design, safe migrations
  • A track record of improving system quality through testing and CI, not just shipping fast
  • Ability to scope work into shippable slices, write clear technical tickets, and give estimates that flag the real unknowns

What stands out

  • Fintech, payments, or insurtech experience. Pricing engines, transactional logging, refunds, reconciliation
  • You've built or maintained a public B2B API with Stripe-level expectations (versioning, docs, SDK)
  • Robust webhook systems. Signing, retries, delivery logs, replay, deduplication, out-of-order handling
  • Security and compliance depth. SOC 2 controls, audit logging, secrets management, least-privilege design
  • AWS depth. ECS/Fargate, EventBridge/Lambda, SQS/SNS, RDS, CloudWatch, Terraform

What the first 6 months look like

You take ownership of our Agentic Sales, Customer Service, and Claims platform modules. Partner API features become more robust and self-service. Better docs, better debugging, fewer escalations. Release confidence improves because the test coverage and CI gates are finally doing real work. Partners ship faster because the platform gets out of their way.

That's the job. If that sounds like the right kind of hard, let's talk.