bash² concurrent¹ networking⁵ memcached¹ sqlite¹ nginx³ log4j² csv¹ linux¹¹ virtualization¹ service assurance¹ git¹ poi² jenkins¹ nagios² mac³ ant³ supervisor¹ vim¹ mysql⁶ flask² docker¹ security¹ terraform¹ rails⁷ css⁵ automation¹⁰ multiprocessing¹ react¹ sql³ redis³ testng⁶ jquery¹ nodejs¹³ database⁵ spring¹ typescript¹ celery¹ xpath¹ json³ aspect oriented programming² ruby²⁰ socket.io² npm¹ multithreading³ java⁴⁵ devops⁵ ini¹ logstash³ nosql¹ yaml¹ html⁵ webdriver⁴ xml¹ mongodb² algorithm⁷ gunicorn¹ ubuntu¹ android¹ robotframework¹ ansible¹ windows⁴ snmp² maven¹ selenium⁵ kibana¹ regular expression¹ service monitoring¹ python³⁹ properties¹ javascript¹⁹ elasticsearch² ssl⁵