[Hiring] Staff Application Engineer @CertifyOS

Role Description

We’re looking for a Staff Software Engineer to own the application layer of the CertifyOS platform—the full-stack systems that translate our provider data infrastructure into products that payers, health systems, and digital health companies actually use.

This is a Staff-level role with real architectural scope. You won’t be handed a spec—you’ll define:

• How the application layer is structured
• How the frontend and backend evolve together
• How API contracts are designed for external consumers
• How the engineering practices that govern application development scale with the team

You’ll drive technical strategy, shape engineering culture, and set patterns that other engineers build on.

Problems You’ll Solve

• Building a frontend that scales with product complexity without becoming unmaintainable
• Designing API contracts that serve both internal product teams and external enterprise consumers
• Delivering a polished enterprise product experience on top of complex, async data workflows
• Keeping application performance and reliability high as the data layer grows
• Integrating AI capabilities into the product without compromising UX or reliability

Qualifications

• Staff-level ownership & technical leadership
• 8+ years building production full-stack systems, with demonstrated impact at Staff or Tech Lead level
• Track record of setting technical direction
• Proven ability to influence engineering practices across teams without direct authority
• Experience leading cross-functional technical initiatives
• Full-stack architecture depth
• Deep backend expertise in Java or a comparable strongly-typed language
• Strong frontend architecture skills in React and TypeScript
• Experience designing and evolving external-facing APIs
• Fluency across API paradigms
• Enterprise product & integration patterns
• Performance, reliability & observability
• AI-era engineering
• Communication & mentorship

Requirements

• Experience with microfrontend architectures or design system libraries at scale
• Familiarity with healthcare data standards (FHIR, HL7) or credentialing and enrollment workflows
• Experience with feature flagging, A/B testing infrastructure, or progressive rollout patterns
• Familiarity with accessibility standards (WCAG) in enterprise product contexts
• Experience with cost optimization for cloud-native application deployments
• Track record of reducing frontend or backend technical debt through iterative architecture migration

Technologies & Tools

• Java 21 / Quarkus
• React / TypeScript
• GCP (Spanner, BigQuery)
• Kafka
• REST / GraphQL / gRPC / WebSockets
• Docker / Kubernetes
• GitHub Actions
• Sentry
• Cursor / Claude Code / Codex

Benefits

• 100% coverage of health, dental, and vision insurance premiums for employees
• Unlimited PTO for US-based team, with at least two weeks off each year
• Health insurance, statutory leave benefits, and additional wellness leave for women in India
• Commitment to building an inclusive environment
• Pay transparency and open culture for compensation conversations