Karl Hennigan

KarlHennigan.com

Karl Hennigan Services

Karl Hennigan Services - Web Consultancy and Development

Past Work Contact Me

About

Introduction

I am Karl Hennigan, a Leeds based web developer I have been developing sites and web content since around 2002 and commercially since 2005. I primarily code in PHP and Javascript but welcome any opportunity to play around with alternative platforms and languages.

Services

Domain Recovery

Expired or lost domain? I can work with you to reclaim your domain. It easy for a domain registration to lapse.

Website Restoration

Website & System Repairs

Other Skills & Services

Frontend Development

Layout frameworks: Bootstrap 2, Bootstrap 3, Zurb Foundation 4 Javascript, jQuery. HTML5, CSS3, Search Engine Optimisation (SEO), Google Analytics

Web Security

Knowledge of data validation and sanitisation, prevention of XSS, CSRF, SQL injection, Session Hijacking & Fixation, other web exploits for secure applications. OWASP. Installation, configuration and use of network analysis and vulnerability software including Nessus, OpenVAS, Saint, OSSEC, Kismet

Backend Development

PHP4 - PHP 5.5 & OOP MySQL 4-5.5, Database optimisation and scalability. XML, JSON parsing and construction, REST Payment Gateway API Integrations: Able2Buy, Google Checkout, PayPal, epoch, Barclays ePDQ, Sage Line 50 MVC Frameworks: Zend Framework, Slim Framework and some experience with Laravel. C++ and Java experience

Server Administration

Unix, OS X, Debian, Red Hat, Shell Scripting, Virtualisation

Amazon Web Services

AWS Elastic Transcoder, AWS API, AWS SNS Notifications, S3 objects

Software

Git repositories, SVN repositories, Bamboo CI. Wordpress Installation, configuration and WP plugin writing

Contact Me

Via Contact Form...

Thing's I've done

Here are a list of some of the things I have worked on previously (Screenshots to come)

Network Security Appliances

Restriction note *

Description:

Building, supporting, updating and bugfixing security appliances through several iterations to meet clients security needs in an ever changing landscape. It was a requirement of these systems to update plugins and data definitions automatically as new vulnerabilities surface daily.

Skills Applied:

CSSPHPAPACHEPHP CLIHigh Volume MySQLMySQL OptimisationSQLite3JSjQueryShell ScriptingSecurityVPNsAuto updatesServer ConfigurationLinux Hardening

Technologies Utilised:

NessusOpenVASOSSECIDSKismetYubiKey 2 Factor AuthenticationSVNSSH

Internal Dashboard Systems

Restriction note *

Description:

As part of a small team of developers we designed and built backend microservices and API specification for various internal department systems and Frontend Dashboard to Interface with these services in this multi phase project. Communication was key on this project as we dealt with so many separate parts in changing states of completion in rapidly paced agile sprints.

Skills Applied:

Restful API DesignPHPUnitMySQLObject Oriented PHPJSjQueryCommunication

Technologies Utilised:

GITAtlassian BambooJIRAAPIZend FrameworkBootstrap 3

BadgerScreen

Description:

I Designed and built site, this was a fun excuse to experiment with SASS, Compass and CSS3 effects. I really enjoyed working on this one and am still pleased with the vibrant colour scheme and retro style graphics to this day. Badgerscreen is site used by myself and a friend for web repair and data recovery work among other general IT related services.

Skills Applied:

CSS3JavascriptHTML5

Technologies Utilised:

SASSCompassZurb Foundation

Wordpress Plugin: Video Transcoder

Restriction note *

Description:

Written plugins for Wordpress to transcode individual uploaded videos from the post or huge amounts in bulk via AWS Elastic transcoder into various sizes and media formats with queue state updates and status reporting the final videos would then be automatically available on the relevant products for purchase once ready via communications with the Amazon Web Services Infrastructure.

Skills Applied:

PHPWordpress Plugin Development

Technologies Utilised:

wordpressAWS ServicesAWS SDKs

Wordpress plugin: Shopping Cart Modifications

Restriction note *

Description:

The client had requirements for additional payment methods not currently supported by wordpress store plugin, Modified Wordpress cart plugins to add additional unsupported payment gateways and handle the relevant callbacks correctly whilst adhering to the original plugin design as closely as possible.

Skills Applied:

PHPWordpress Plugin DevelopmentAPI

Technologies Utilised:

Payment Gateways

Real Oak Floors

No longer tradingOld site **

Description:

Worked for wood flooring company e-commerce site. Rebuilt large portions of cart and database to improve performance and search engine optimisation.

Skills Applied:

SEOCSSPHPMySQLAPACHEPHP CLIPayment Gateway Integration

Technologies Utilised:

Sage Line 50Google CheckoutBarclays ePDQProtx VSPGoogle Checkoutable2buy finance gatewayGoogle Analytics

WorkspaceDB

Description:

A system of mine to create a database of remote locations where one can study / work such a coffee shops, bars etc. name and url is provisional, may reuse the source for other purposes.

Skills Applied:

PHPCSS3JSjQueryHTML5Responsive Web Design

Technologies Utilised:

PHPMongoDBAPI for Android ClientGeo LocationBootstrap 3Google Maps APISlim Framework

Google Chrome Plugin: Hidden Field Enabler

Chrome browser plugin

Description:

Google Chrome Plugin to render hidden text fields visible and editable at the click of a button. I built this plugin for development purposes as I had requirements to check the values of hidden fields at runtime without the need to find the hidden element via inspector.

Skills Applied:

CSSJavascriptChrome Plugin Development

Technologies Utilised:

Google Developer Dashboard

Mango Hair Design

Old site **

Description:

Designed and built this freelance hairdresser's website, would be nice to bring this up to date with newer web technologies. Note: this was a long time ago and refers to a previous version of the site.

Skills Applied:

CSSJavascriptPHPSEOXHTML

Technologies Utilised:

Smarty Templating EngineGoogle Analytics

APTMotors

Old site **

Description:

Site for local garage, built several years ago. Would be nice to overhaul the site and bring the design up to modern standards.

Skills Applied:

CSSPHPSEOXHTML

Technologies Utilised:

Google Analytics

Notes

* Restriction note - Implies some details may be withheld for the purposes of security, privacy and / or professional courtesy. Some additional information may be available upon personal request.

** Old site - The site or application is old, may not stand up to the technology of today or the design may seem dated. Think watching an old film that looked great then but these days not so much. Due to some of these sites being updated or no longer in existence the links may be via The Way Back Machine.

Fun - Items tagged with fun are things I have done for fun. They may be less than mature or even in some cases, offensive. Thankfully they are disabled by default.