CODEC VIETNAM TECHNOLOGY JSC
Fullstack Developer
1. RAR-SSC Revenue Management System (hocphi.rar-ssc.vn)
Role: Frontend Developer
An online tuition fee management and payment system for schools, currently serving over 600 schools and scaling.
Tech Stack: ReactJS, TypeScript, React Query, Zustand, Ant Design, Firebase, Docker, Jenkins, Nginx
- Built a scalable interface using ReactJS and Ant Design.
- Implemented JWT authentication and RBAC authorization.
- Built and integrated a realtime module for maintenance state configuration and direct notification syncing.
- Deployed applications using Docker on Linux environment.
2. SME - Admin Advertising planning (planning.adiq.vn)
Role: Fullstack Developer
An administration system for SME and employee accounts, supporting permission management, SSO login, and data synchronization for rating and inventory from VTV rating.
Tech Stack: ReactJS, NodeJS, ExpressJS, Keycloak, PostgreSQL, TypeORM, Redis, BullMQ, Docker
- Installed and integrated Keycloak for authentication, RBAC, and SSO login.
- Customized the Keycloak SSO login interface.
- Developed a cron job service to sync rating and inventory data from VTV rating using Worker, BullMQ, and Redis.
- Participated in building the UI and integrating APIs for the admin page using ReactJS.
- Used Konga to manage related API Gateways/services.
3. Codec Ad SDK (Instream/Outstream)
Role: Frontend Developer
An advertising SDK supporting Instream and Outstream video ads integration for websites, supporting VAST/VMAP/VPAID and optimizing cross-platform display.
Tech Stack: TypeScript, Google IMA SDK, Rollup, HTML5 Video API, Docker, CDN
- Participated in developing a video ad SDK based on Google IMA.
- Built the Instream ad processing flow for HTML5 Video Player.
- Developed impression tracking, analytics, and device metadata features.
- Optimized ad display capabilities on Mobile, Tablet, and Desktop.
4. International Travel Sim (simdulichquocte.vn)
Role: Fullstack Developer
Backend system to manage and sync data from sim partners, managing accounts, products, exchange rates, data packages, and agency pricing.
Tech Stack: ReactJS, NextJS, TypeScript, NodeJS, ExpressJS, PostgreSQL, TypeORM, Cloudinary
- Built authentication and RBAC authorization functions.
- Integrated Cloudinary for image storage.
- Designed PostgreSQL Materialized Views to optimize query performance for pricing and package data.
- Participated in API integration for the admin and website interfaces.
- Analyzed requirements and proposed optimal solutions for the data synchronization process with partners.
5. ADS Admin Account Management System
Role: Fullstack Developer
An account administration system managing DSP accounts, employees, campaign moderation, and routing campaigns to the SSP system.
Tech Stack: ReactJS, NodeJS, ExpressJS, Keycloak, PostgreSQL, TypeORM, Redis, Docker, Nginx
- Installed and integrated Keycloak for authentication, RBAC, and SSO login.
- Customized the Keycloak SSO login interface.
- Built OTP authentication and email notification features using Redis.
- Deployed Docker applications on Ubuntu Linux with Nginx reverse proxy.
- Participated in building the UI and connecting APIs for the admin page.
6. AD Server System
Role: Backend Developer
A system that processes ad requests, retrieves data from Redis, and generates VAST/VMAP files.
Tech Stack: TypeScript, NodeJS, ExpressJS, Redis, Docker, Nginx
- Connected with Redis and SSP/DSP to process requests and retrieve ad data.
- Built a module to generate VAST/VMAP files.
7. Tracking & Data Processing System
Role: Backend Developer
A system that receives advertising tracking data in raw log format, processes, cleans, and aggregates data for analysis and reporting.
Tech Stack: Docker, Kafka, GitLab CI/CD, Swagger, Ubuntu Linux, Nginx
- Used Kafka to ingest, buffer, and consume real-time raw tracking logs.
- Built a cronjob system to process tracking data on schedule.
- Performed cleaning, standardization, and processing of tracking data from raw logs.
8. Asynchronous Email Sending Service via Message Queue
Role: Backend Developer
An asynchronous email processing system utilizing a queuing mechanism to ensure high availability and prevent blocking the application's main thread.
Tech Stack: NodeJS, ExpressJS, Kafka, Kafkajs, Nodemailer, Docker
- Configured a Message Queue using Kafka to manage asynchronous email delivery tasks.
- Developed an Express API Producer to receive mail requests, validate input, and publish events to the target topic.
- Built a Kafka Consumer Worker to consume event data and deliver emails via SMTP using Nodemailer.
