Bao Duong

Fullstack developer with 4 years at KMS Technology building React/TypeScript products for US healthcare and compliance clients, plus a concurrent freelance contract. Owns interface systems, API integration, and state management (TanStack Query, Zustand, Redux), and works in Node.js, NestJS, or .NET when a feature crosses into the service layer. Uses Cursor and Claude to ship faster without dropping type safety, tests, or review quality.

Fullstack Developer at KMS Technology (2022-08 – 2026-09)

Client projects at KMS, most recent first.

Fullstack Developer at UltraRAD (2025-05 – 2026-08)

React, TypeScript, C#, PostgreSQL · Zustand, TanStack Query, Jotai

• Owned screen flows for a healthcare product, joining React views to C# services and PostgreSQL records.
• Introduced Zustand, TanStack Query, and Jotai so teams shared one pattern for local state and server cache.
• Shipped desktop and mobile layouts plus third-party integrations used in the main workflows.

Fullstack Developer at Internal Tools (2025-03 – 2025-05)

React, TypeScript, NestJS, PostgreSQL · Zustand, TanStack Query

• Designed and built the tool alone: NestJS endpoints, PostgreSQL, and the TypeScript screens on top.
• Reworked database queries and improved retrieval speed by ~40%.
• Tied third-party APIs into those screens and released them without a second engineer.

Fullstack Developer at In The Network (2024-08 – 2025-02)

React, TypeScript, Python, PostgreSQL · Tailwind CSS, Material UI, GraphQL

• Built feature modules with Tailwind CSS and Material UI against REST and GraphQL from Python and PostgreSQL.
• Cut perceived load time with lazy loading, memoization, and code splitting on heavier pages.
• Added Jest, React Testing Library, and Cypress, then wired that coverage into CI/CD.

Fullstack Developer at TitanHealth (2024-02 – 2024-09)

React, TypeScript, ASP.NET Core / C#, SQL · EF Core, Dapper

• Developed the React client against ASP.NET Core (.NET 6) REST APIs, including the business and service layers those views call.
• Implemented the views over SQL Server data access with Entity Framework Core and Dapper.
• Wrote xUnit/NUnit tests with Moq and reviewed changes on both the API and the interface.

Fullstack Developer at PatientsLikeMe Inc (2023-03 – 2024-01)

React, TypeScript, Ruby, PostgreSQL

• Shipped patient-facing TypeScript screens for a US healthcare product on Ruby and PostgreSQL APIs.
• Turned Figma and Adobe XD into reusable, type-safe components used across those flows.
• Managed feature state with Hooks and Context, and handled loading, error, and empty states around the calls.

Fullstack Developer at SDLC Compliance, Inc (2022-08 – 2023-02)

React, TypeScript, Node.js, PostgreSQL · React Query / SWR

• Built the compliance product from Figma and Adobe XD, with Node.js and PostgreSQL behind the screens.
• Fetched and cached responses through Axios, React Query, and SWR, typing them so contract mismatches failed before runtime.
• Set reusable component patterns that later KMS products kept using.

Fullstack Developer at PSA Company (2025-08 – 2026-06)

React, Node.js, REST APIs · Cursor, Claude

• Built responsive React and Node.js features; REST changes improved data retrieval speed by ~30%.
• Worked with UX/UI designers on interface updates that increased engagement by ~25%.
• Automated testing and cut post-launch bug reports by ~50%.
• Used Cursor and Claude to generate, refactor, and test code (~40–50% faster), including Clean Code reviews, security checks, and technical documentation.

B.S. in Information Security – University of Information Technology (2019-01 – 2023-01)