Languages
Python, Go, Python 3, Python 2, C++, JavaScript, SQL, Java, CSS, Lua, C, PHP, XML, C++11, HTML, C#, YAML
Paradigms
Back-end Architecture, Concurrent Programming, Parallel Programming, Unit Testing, RESTful Development, On-page SEO, REST, Object-oriented Design (OOD), DDoS, Object-relational Mapping (ORM), Hosting, Object-oriented Programming (OOP)
Storage
Redis, NoSQL, MongoDB, Cassandra, JSON, OVH, MySQL, PostgreSQL, Oracle SQL, SQLite, AWS S3
Other
AWS, Back-end Development, Content Delivery Networks (CDN), APIs, Back-end, Ajax, Scraping, Web Scraping, Full-stack, Web Hosting, Web Hosting & Domain Setup, Web Host Manager (WHM), Prometheus, Tornado, RESTful APIs, Web Development, RPC, Cookies, Akamai, Regular Expressions, Tornadoweb
Frameworks
Django, Angular, Bootstrap, Flask, Unity3D
Libraries/APIs
jQuery, Node.js, AMQP, PyMongo, Google AdSense, Requests, Facebook API
Tools
Atom, NGINX, Sentry, RabbitMQ, Varnish, Git, uWSGI, Slack, Trello, Apache, Postman, Google Analytics, Celery
Platforms
Visual Studio Code, New Relic, Windows, Ubuntu, Linux, Debian, Amazon Web Services (AWS)