Jon W.

Senior developer and security consultant for hire! Over 10 years experience in the field performing penetration tests and crafting systems in a wide range of languages. I have a good working knowledge of: * PHP, Python, Perl, C, Lua, Tcl, Shell Script, HTML, JavaScript * MySQL and PostgreSQL relational databases; Redis and Memcached NoSQL databases * Nginx and Apache installation, security and optimisation * High-availability clustering with DRBD, Pacemaker and Corosync * Load balancing with Varnish and Citrix NetScaler ADC * Linux and Unix, from Solaris to CentOS to Ubuntu * Networking concepts from low-level TCP/IP to firewalls and routing * Modern security standards, methodologies, and industry standard tools * Secure programming techniques and common pitfalls Contact me to arrange a pentest, or if you have an interesting software project that needs attention to detail!