1. Designed the 20+ RESTful APIs across microservices serving front-end application

2. Synchronized with the data are rendered real-time between website and mobile platform to ensure there are no contradictions when the users interact some functions on user interface

3. Implemented face-detection pipeline real-time using SSD ResNet-10 and OpenFace nn4.small2 for achieving face detection and recognition, the result are 98% accuracy threshold detecting face and 60%+ accuracy for checking similarity.

4. Architected a high-performance messaging system using WebSocket & StompJS protocols, bi-directional communicate for over 1,000+ messages daily with sub-100ms response time

5. Integrated QR-based payment online via banking Sepay APIs real-time, supporting various of banking type and handling concurrently

Team Size: 2

1. Implemented a security infrastructure using Spring Security and Spring OAuth2 with Keycloak, guaranteeing some sensitive user endpoints have to be protected through validating Role-Based Access Control (RBAC)

2. Architected high-performance real-time messages using WebSocket & StompJS protocols, serving for over 500 requests daily from sending, calling or notifcation messages with ensuring the response must be in range sub-200ms to sub-1000ms response time

3. Implemented the WebRTC technique in frontend for engineering phone or video calls between users gather real-time with the response time in range sub-100ms to sub-2000ms, dependence on user’s network

Team Size: 1