development
- Python 2 and 3 & libraries (inc. PyGTK, NumPy, Requests, PyParsing etc).
- Java 2 - Java 8, plus the usual libraries
- Haskell plus some Hspec, Servant, QuickCheck.
- Android SDKs 12-24, libGDX, Google Play.
- JavaScript, TypeScript, Meteor.
- Groovy 2.x & various libraries.
- HTML / XHTML 2-5
- CSS 2 & 3, and LESS / SASS.
- Databases: RDBMS (MySQL, DB/2 etc)
and NoSQL (DynamoDB, MongoDB, Cassandra). - Git, Mercurial, Perforce, Subversion
systems / devops
- Linux: Ubuntu x64 (6.10 - 18.10)
- Linux: CentOS / Fedora
- Cloud infrastructure (AWS, Digital Ocean etc).
- Docker & Docker Compose.
Some Kubernetes, Mesos / Marathon. Virtualbox. - Gradle, Maven & plugins. Also Stack & Cabal. Pipenv.
- BASH, ZSH, Python for sysadmin.
- Web Servers: Nginx, Apache, Jetty, node.js. HA-Proxy.
- PKI & SSL / TLS, OpenSSL. Also JWE (JWTs etc).
- Video & audio processing with ffmpeg, libx264 / x265.
- CI systems: Jenkins, Travis, CircleCI ecosystems.
- IoT : Z-wave, MQTT, Amazon Alexa etc.