Last year, 2015 was a great year, it was my 3rd year as a Lead DevOps Engineer at my company. It was a year where was able to try a lot of new stuff, here is a list of things I learnt and skills I developed and consolidated during this time:
Continuous Delivery and Continuous Integration
Agile, Lean & Kanban
Immutable Infrastructure, Infrastructure as Code
Logging and measuring (BigData, Data Mining and Process Mining)
BDD, TDD and software quality
Functional programming (Got introduced to monads, pure functions, higher order functions).
MongoDB Aggregation Framework.
HA, Distributed Systems, Cluster Management solutions, Mesos, Docker, PostgresHA, Pacemaker & DRBD and Split-Brains
CSS, SASS, PostCSS, Bootstrap, FontAwesome and Compass
Linux (OS and Kernel), tmux, prezto and zsh, CentOS 6 & 7, Ubuntu, Mint, CoreOS
Time management and organizational skills using GTD and Wunderlist