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About me

Alexander Liu

Coder, Tinker, Poet, Hacker, Entrepreneur

I develop apps in Python mostly. Also I do model designing, PHP, C, Java, embedded programming, RESTful APIs. I hack and build drones, satellites legally.

With a sensitive vision of tech trend. Thrilled at from 0 to 1.

Python stacks

Part Property Applications Level Note
Tornado Web Framework Non-blocking asynchronous RESTful API, Web services, Designed complex handlers Specialist N/A
Django Web Framework Model designing, web services Professional N/A
Flask Web Framework Simple web service designing Skilled N/A
Web.py Web Framework Simple web service designing Skilled N/A
Pyramid Web Framework Complex web service designing Average N/A
SQLAlchemy SQL ORM Used with Torando, Flask, web.py for complex SQL sessions Skilled N/A
NLTK Natural Language Processing Stemming words from social media/(other sources) and predicting their interests, attentions Skilled N/A
Pandas Data Processing After crawling useful data from anywhere, in frames do the data processing, visulization, rendering; Predicting stock prices Skilled N/A
Scrapy Web Crawler Framework Organized framework, operated with Tornado, Django, Flask, SQLAlchemy Skilled N/A
BeautifulSoup Web Crawler Retriving useful info from Internet automatically Skilled N/A

Data stacks

Part Property Applications Level Note
PostgreSQL Relational and NoSQL Database Relational model designing and NoSQL model designing since PSQL V9.5 Professional N/A
Postgis Geolocation plugin for PostgreSQL Coordinators, location based services, geometry service engine Professional N/A
MySQL Relational Database Relational model designing Skilled N/A
Redis NoSQL Database Usually for caching Skilled N/A
Elasticsearch NoSQL Database and Search Engine Search engines Professional N/A
Logstash Elasticsearch Family Tool Log parser Skilled N/A
Kibana Elasticsearch Family Tool Result selector and viewer Skilled N/A
Filebeat Elasticsearch Family Tool Log file shipper Skilled N/A

IoT stacks

Part Property Applications Level Note
Mosquitto Message Broker in MQTT Protocol Instant messaging, embedded devices Specialist N/A
emqtt Message Broker in MQTT Protocol Instant messaging, embedded devices Skilled N/A
Paho-mqtt MQTT Protocol Wrapper IoT client and model designing Specialist N/A
Gearman Parallel Task Distribution Framework Handling heavily requests persistently with load balance Professional N/A

CI/CD

Part Property Applications Level Note
Jenkins Continuous Integration/Development All things automatically Skilled N/A

VM stacks

Part Property Applications Level Note
Docker System and App Baker Middleware services, custom systems for iterative development Skilled N/A
Snappy App Baker Standalone closed service like firmware Average N/A
VirtualBox VM Hoster Switching between different DE used everyday Skilled N/A
Qemu VM Hoster Raspberry Pi ARM based CPU emulator for firmware testing and building Skilled N/A

Fond stacks

Part Property Applications Level Note
Linux Development Environment Daily Professional N/A
Vim IDE Daily Professional N/A
ROS Realtime Operation System Avrdude, Arduno IDE, Drone and cool projects Skilled N/A
80C51 architecture Embedded Embedded C language in Keil u3 Base layer hardware development Skilled N/A

Cyber security

Encryption, decryption, peneration (legally), injection (legally), social engineering, forensics...

To be contined ...

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