Senior Software Engineer, Full Stack (TypeScript, React, AWS)

Join a digital health technology company's engineering team to build the backend services and patient-facing applications behind EHR-integrated care.

1. Overview

A leading digital health technology company is hiring a Senior Full Stack Engineer to design and build the backend services, distributed systems, and patient-facing applications behind its EHR-integrated care platform. You'll work in TypeScript/Node.js and React, ship microservices on AWS, and help shape technical direction.

This is a full-time W-2 employment position with Cincinnatus LLC, based in Seattle, WA, with the opportunity to be placed at a leading healthcare technology company as part of their extended workforce. Note: this is a hybrid role with two days a week in the Seattle office.

2. Key Responsibilities

• Design and build robust TypeScript/Node.js services for EHR integrations and clinical workflows.
• Deploy and operate microservices on AWS using containerization.
• Build React/TypeScript provider- and patient-facing interfaces optimized for desktop and mobile.
• Develop integrations with patient-education and patient-engagement vendors, including notifications and tracking.
• Contribute to code reviews and system-design discussions, balancing quality with startup speed.

3. Core Qualifications

• 3 to 5 years of professional experience building production software systems using TypeScript/JavaScript.
• Strong computer science fundamentals: algorithms, data structures, OOP design, concurrency, and distributed systems.
• RESTful or event-driven API development with Node.js (Nest/Express).
• Strong front-end skills with React and TypeScript, including mobile and desktop optimization.
• Comfort debugging across distributed services and working agilely in a startup environment.
• Must be a U.S. citizen or permanent resident located in the United States; this role is hybrid, with onsite days in Seattle, WA.

Preferred Qualifications

• Healthcare startup or health-data integration background.
• High-throughput messaging platform experience.
• AWS, GCP, or Azure cloud experience.
• Tailwind CSS expertise.

About Cincinnatus LLC: Cincinnatus LLC is an enterprise staffing company that partners with leading technology companies to source and employ highly skilled professionals for contingent and contract-based opportunities. Cincinnatus serves as the employer of record for these engagements, providing W-2 employment, payroll, and compliance, while placing employees directly within client teams to work on high-impact initiatives.

Equal Employment Opportunity: Cincinnatus is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or any other legally protected characteristic.