TKSpring, Senior Backend Engineer, Nov 2022 ~ till now

I am a  senior backend engineer, TKSpring is a company that build a CryptoCurrency trading platform with zero-knowledge-proof technology.

Responsibility:

Develop api for trading platform.

Deploy service on to cloud.

RedPill, Senior Backend Engineer, Nov 2019 ~ Oct 2021

I am a  senior backend engineer, RedPill is a company that produce AR/VR IDE to help creating AR/VR content.

RedPill Authentication/Authorization Service:

• Build a authentication/authorization server with AWS Cognito service. This make service could be use cloud service to calculate usage rate for RedPill products, for example: RedPill Studio, AiCast  

• Build a real time calculate usage function with AWS lambda. This make service could charge by the calculated time.

• Develop a Promo code service with AWS Elasticache. The service is for RedPill Studio/AiCast user Promo code to use coupon.

RedPill Admin Web/AiCast Web:

• Lead frontend engineer to build RedPill admin website, RedPill cast website by AWS Fargate. This site is the portal for RedPill product  user to manage their profile and AR/VR assets.

• Build a signal server by WebSocket  by AWS Fargate service. This server is for exchange information between 2 WebRTC client.

• Help front-end engineer to build AiCast video website with AWS S3 and AWS Cloudfront as a static website. This site is the portal for AiCast user to use WebRTC interact with AiCast software by AiCast signal server.

DevOp:

• Use AWS cdk as the deploy tool to make the deployment for architecture could be easy to control and maintain,  reduce the deploy time for original hand-by-hand deployment.
• Setup deployment part on the Github Action to make deploy process easily to control and share with team member.

Tech Stack:  AWS Fargate,  AWS elasticache, AWS Cloudfront ,AWS S3, node.js ,nuxt.js , WebRTC ,AWS cdk, Github Action

Coolbitx, Full stack developer, Oct 2017 ~ Oct 2019

Coolbitx Wallet api server:

• Develop Coolbitx Wallet RESTful api server on AWS EC2 with Docker implement by koa2. This server provides RESTful api for Coolbitx Wallet to interact,which is a proxy server between wallet and Crypto Currency nodes. 

• Develop HSM(Hardware Security Management) verify node on AWS EC2 with Docker, use AWS HSM to preserve wallet secret key. This node provide RESTful api to access by key which is deploy on AWS EC2 and wrap in a Docker container.

• Develop account management service in Sygna project by koa2 on AWS EC2 wrap in Docker container. This account management service use Redis as the verify account activate cache by cache the not activated account in Redis. 

• Help coworker to deploy Sygna Bridge with AWS lambda, and AWS DynamoDB as storage, Synga Bridge provides a whitelist check middleware between two exchanges when users in two exchanges try to transfer transaction between two exchanges.
• Help coworker to deploy Sygna Bridge webhook callback mechanism by AWS SQS consumer to make the webhook work more efficient and reliable by queue the request on AWS SQS then consumer by AWS SQS consumer.  
  

Coolbitx Wallet:

• Develop wallet connect api for Coolbitx Wallet to support interact with Binance Dapp. Wallet connect api is a protocol for mobile app to interact with Dapp, I wrote the event in Coolbtix Wallet app to enable this function work .
• Develop Changelly api for Coolbitx Wallet to by ReactNative event. Changelly is a token exchange for swapping Token, I wrote the ReactNative event to enable Coolbitx Wallet to use Changelly api to swap token in wallet.

DevOp:

• Setup the deployment on gitlab-ci pipeline for easy to deploy Sygna-related service on AWS cloud for easily to maintain and control the deployment, make team member could easily deploy and reuse  the deployment for same architecture use previous.

Tech Stack: AWS DynamoDB,AWS EC2,AWS HSM,AWS lambda,AWS SQS, Docker,node.js,koa2, gitlab-ci,ReactNative

Gorilla Tech, Web developer, Apr 2016 ~ Oct 2017

• Maintain WIFI-Tactical project which is wrote by nodejs use WebSocket to streaming the result , help upgrading nodejs version. This web project is portal for search the sniffing message from antenna which receive the message send from our hacked app on suspect's phone. 

Crime investigation search ui: 

• Use reactjs to implement interface. This website is the portal for crime investigation engine to search suspect's monitoring data sorted by timeline, which could make the analysis the geographic location of the suspect.

Tech Stack:  Java Swing, nodejs, Reactjs, Websocket

SYSCOＭ, Software developer, Apr 2015 ~ Apr 2016

• Develop Broker order system for emerging stock by Java Web and SQLServer and use javascript for ui control. The system interactive with emerging stock operation system which will report and show the  stock information daily.

Maintain broker order system for emerging stock:  

• Backup DB regularly,   Disaster Drill for system crash

Tech Stack: Java Web, SQLServer, javascript, Bootstrap

ASUS, Firmware developer, Apr 2014 ~ Apr 2015

I worked in ASUS as an firmware developer. ASUS is a computer hardware and consumer electronics company.

Responsibility:

• Porting device function to motherboard: implementation hardware driver to make hardware could work normally.
• Board Supported Platform Research and help developing mobile device driver.

Tech Stack: C, git, gerrit, UEFI

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