xros -- Alexander Liu

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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