Dong Ying

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Senior FullStack Engineer

Hai-Doc LLC

Feb 2025 - Nov 2025 (10 months)

As a Full Stack Software Engineer at the HaiDoc project, I led the end-to-end design and development of healthcare platform features supporting clinicians, clinics, pharmacies, laboratories, and patient workflows such as appointments, consultations, laboratory tests, medication prescriptions, and medication delivery. On the frontend, I developed modern, accessible web applications using React, TypeScript, TailwindCSS, Next.js and Figma UI/UX, delivering responsive and intuitive user experiences tailored for both medical staff and patients. I collaborated closely with product and clinical stakeholders to translate complex healthcare requirements into usable, high-quality interfaces. On the backend, I designed and implemented scalable servi

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Senior Full Stack Developer

Tactical AI LLC, Projectory AI

Oct 2024 - Jul 2025 (10 months)

As a Software Engineer at the ProjectoryAI project, I contributed to the development and optimization of full-stack systems supporting AI-driven workflows across development and production environments. My work focused on building performant, reliable, and maintainable features while collaborating closely with engineers on system design and code quality. On the frontend, I built responsive and SEO-optimized user interfaces using Vue.js, improving application performance and enhancing the overall user experience. I applied best practices in component design and performance optimization to ensure scalability and maintainability. On the backend, I designed, developed, and maintained RESTful APIs using NestJS and FastAPI, implementing secure

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Senior Full Stack Developer

Aiiro, Tactical AI LLC

Jun 2024 - Sep 2025 (1 year 4 months)

As a Full Stack Software Engineer at the aiiro.ai project as well, I designed and implemented RESTful backend services using NestJS, delivering secure, well-documented APIs with robust authentication, authorization, and request validation. These services supported scalable application workflows and enabled reliable integration across frontend, AI, and third-party systems. On the frontend, I built and optimized high-performance user interfaces using Vue.js and Redux, improving SEO, state management, rendering efficiency, and long-term maintainability. I developed reusable and scalable UI components and shared design patterns, strengthening consistency across the codebase and accelerating feature development. I architected and optimized Pos

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Senior FullStack Developer

Parade Inc.

Mar 2024 - Sep 2024 (7 months)

As a Full Stack Software Engineer at the ParaDe project, I built and delivered production-grade frontend and backend features using React, Next.js, NestJS, and TypeScript, improving application interaction speed and contributing to increased client satisfaction. I worked across the stack to ensure features were performant, scalable, and aligned with both product and business goals. I designed and optimized PostgreSQL relational schemas using Prisma ORM, writing efficient queries to support data-driven application workflows and long-term scalability. To further improve performance, I implemented Redis for caching and backend optimization, significantly reducing API response times and lowering system load under production traffic. On the ba

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Senior FullStack Engineer

Brainz Health,

Dec 2023 - Mar 2024 (4 months)

As a Full Stack Software Engineer at the Brainz-Health project, I built and operated end-to-end healthcare backend services using Python (Django), PostgreSQL, and Redis, supporting secure, scalable, and production-grade systems, including a real-time AI-powered mental health chatbot. My work focused on delivering reliable healthcare workflows while meeting performance, scalability, and compliance requirements. I developed and optimized frontend applications using React and Next.js, significantly improving rendering efficiency, responsiveness, and overall user experience. Through performance tuning and architectural improvements, I increased application performance, driving higher user engagement and smoother real-time interactions. I inte

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Senior Full Stack Software Engineer | AI & HealthTech | React, Next.js, NestJS, Python, AWS

Digital Investments and Strategies S.A.,

May 2023 - Dec 2023 (8 months)

As a full-stack software engineer, I built a scalable RESTful API using Node.js and integrated OpenAI-based services (Python) and the WhatsApp API to support Buddy AI, a real-time conversational chatbot designed for fast and reliable user interactions. I was responsible for the backend integration layer, which enabled real-time messaging, AI inference, and task execution across multiple platforms. As CTO of the Nasih AI project, I led and reviewed web and mobile development using Next.js and React Native, working with two front-end developers. I delivered a responsive, user-friendly interface based on Figma UI/UX design. I improved AI response quality and task relevance through targeted prompt engineering and completeness tuning. I also i

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Senior Frontend Developer

Cicada Technologies Inc

May 2020 - Apr 2023 (3 years)

As a Senior Frontend Developer at the Cicada trading project, I designed and delivered high-performance trading application frontends using React, Next.js, Redux, and TypeScript, optimizing rendering, state management, and bundle size to achieve faster page load times in production environments. I built responsive, mobile-first web applications with a strong focus on usability and accessibility, improving overall user experience across desktop and mobile platforms. I collaborated closely with UX designers to translate complex trading workflows into intuitive, user-centric interfaces. I implemented server-side rendering (SSR), client-side rendering (CSR), and modern routing patterns in Next.js to support scalable, SEO-optimized, high-traff

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