Open to opportunities

Dat User

@datuser

Message

I am a senior full-stack engineer specializing in React, Node, and scalable systems.

United States

Message

What I'm looking for

I'm seeking a senior full‑stack role where I can architect scalable, secure platforms (FinTech/Healthcare/RealEstate), lead teams, mentor engineers, and deliver cloud‑native, compliance‑focused solutions.

I am a Senior Full Stack Engineer with 10+ years building and scaling full‑stack web applications across FinTech, Healthcare, and Real Estate.

I architect and deliver user interfaces and APIs—designing dynamic React.js UIs with React Hook Form and Yup, and building NestJS/TypeORM/PostgreSQL backends for high‑volume claims and appeals—improving claim accuracy and enabling real‑time analytics.

I implement resilient infrastructure including BullMQ+Redis job queues, GraphQL eligibility checks with Apollo Client, EHR integrations with AthenaHealth, and strict security controls (RBAC, JWT, Passport.js) to support HIPAA compliance.

I lead architecture reviews, mentor junior engineers, and thrive in high‑pressure environments where I transform complex requirements into maintainable, testable, production‑ready solutions.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Engineer

Current

EitBiz

Feb 2023 - Present (2 years 6 months)

Architected and delivered dynamic React UIs with real-time validation for CMS-1500 claim submission, boosting claim accuracy by 30%. Designed NestJS/TypeORM PostgreSQL REST APIs, automated appeal workflows via OpenAI, and built GraphQL eligibility checks and live analytics for real-time status tracking.

React Yup NestJS TypeORM PostgreSQL GraphQL BullMQ Redis

Senior Full Stack Developer

V4 Development LLC

Apr 2020 - Jan 2023 (2 years 9 months)

Built multi-step merchant onboarding and high-throughput payment APIs (Next.js, Express.js, PostgreSQL), created acquirer routing with Redis Pub/Sub and a secure webhook framework, and implemented a NestJS fraud policy engine to improve payment reliability and security.

Next.js NestJS PostgreSQL Redis Webhooks OpenAPI

Full Stack Developer

Saigon Technology

Sep 2015 - Mar 2020 (4 years 6 months)

Delivered high-speed geo-search UI and real-time neighborhood analytics using React, Leaflet, and PostGIS; built listing management, scheduling, and e-signature systems integrating Next.js, Firebase, AWS S3, NestJS, and Twilio.