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Hi, I'm Tey Kai Cong, a passionate full-stack software developer with experience building scalable and reliable internal tools and applications. I enjoy working with cutting-edge technologies and have a strong background in web development, backend automation, and cloud infrastructure. Over the years, I've had the opportunity to work on projects that serve millions of users globally, and I love mentoring junior developers to help them grow. I graduated from the National University of Singapore with a degree in Biomedical Engineering and Business Analytics. I'm always eager to learn new things and take on challenging technical problems that make an impact.…Hi, I'm Tey Kai Cong, a passionate full-stack software developer with experience building scalable and reliable internal tools and applications. I enjoy working with cutting-edge technologies and have a strong background in web development, backend automation, and cloud infrastructure. Over the years, I've had the opportunity to work on projects that serve millions of users globally, and I love mentoring junior developers to help them grow. I graduated from the National University of Singapore with a degree in Biomedical Engineering and Business Analytics. I'm always eager to learn new things and take on challenging technical problems that make an impact.

Tey Kai Cong

Full Stack Developer, Developer, Programmer, +2

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Hi, I'm Tey Kai Cong, a passionate full-stack software developer with experience building scalable and reliable internal tools and applications. I enjoy working with cutting-edge technologies and have a strong background in web development, backend automation, and cloud infrastructure. Over the years, I've had the opportunity to work on projects that serve millions of users globally, and I love mentoring junior developers to help them grow. I graduated from the National University of Singapore with a degree in Biomedical Engineering and Business Analytics. I'm always eager to learn new things and take on challenging technical problems that make an impact.…Hi, I'm Tey Kai Cong, a passionate full-stack software developer with experience building scalable and reliable internal tools and applications. I enjoy working with cutting-edge technologies and have a strong background in web development, backend automation, and cloud infrastructure. Over the years, I've had the opportunity to work on projects that serve millions of users globally, and I love mentoring junior developers to help them grow. I graduated from the National University of Singapore with a degree in Biomedical Engineering and Business Analytics. I'm always eager to learn new things and take on challenging technical problems that make an impact.

Available to hire

Hi, I’m Tey Kai Cong, a passionate full-stack software developer with experience building scalable and reliable internal tools and applications. I enjoy working with cutting-edge technologies and have a strong background in web development, backend automation, and cloud infrastructure. Over the years, I’ve had the opportunity to work on projects that serve millions of users globally, and I love mentoring junior developers to help them grow.

I graduated from the National University of Singapore with a degree in Biomedical Engineering and Business Analytics. I’m always eager to learn new things and take on challenging technical problems that make an impact.

Skills

Experience Level

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Full-Stack Software Developer at MSD

August 1, 2023 - Present

Led design of internal tools using React, Redux, and FastAPI, serving 30+ countries with 99.9% reliability. Automated infrastructure provisioning with Terraform and Helm, enabling scalable Kubernetes deployments. Implemented ArgoCD for GitOps-based continuous delivery, automating declarative Kubernetes deployments for consistency. Mentored junior developers, enforcing best practices through code reviews.

Full-Stack Software Developer at KNOW App

August 31, 2023 - August 3, 2025

Built dynamic features in AngularJS, React, Recoil, TypeScript, PostgreSQL and Firebase for improved application performance, serving over 1.3M active users. Implemented a RabbitMQ-based queue system to enhance system throughput and efficiently handle sharing and notification logic. Resolved Firebase bottleneck of 200k concurrent connections requests with horizontal scaling. Optimized infrastructure costs by migrating existing data from GCP to Cloudflare, significantly reducing egress expenses and generating cost savings of approximately US$5,000 per month.

Python Backend Developer at Linh AI

February 28, 2022 - August 3, 2025

Designed and developed an enterprise computer vision annotation application using Django Rest Framework that serves more than 200 active users on a daily basis. Utilized Python for automation and incorporated Redis for improved caching of frequently accessed data.