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My name's Sam Kelleher, and I am a Senior Full-Stack Web Developer / Software Architect based in London. This website mostly contains a sample of work from my portfolio, tips, and best practices for building web applications.

Portfolio Posts - Page 2

ASOS中国 - Hybrid iOS and Android eCommerce App

ASOS中国 - Hybrid iOS and Android eCommerce App

Stared this project from scratch in Spring 2015 for a London based agency on behalf of their client ASOS China. Following a similar design to the UK iOS app, this Cordova powered runs on both Android and iOS devices, in both orientations, on both mobile and tablet.Making pure JavaScript single page applications is one thing, with it's own set of complexities and challenges; but doing the equivalent for a JavaScript app that will function only in a mobile environment brings with it an entire new set of challenges. These are specifically related to the user interface. The app still has to retain the gesture recognition and actions found in native applications, and perform will full buttery smooth animations expected from real applications. Read more...

Dynamic iOS Passbook with notifications

Dynamic iOS Passbook with notifications

Using a C# API to generate Passbook passes for the Passbook app on iPhones using iOS. The system can then track each users subscription, and send updates in realtime to each device via the Apple Push Notification Service (APNS). Read more...

CMS Gallery + GIF Support

CMS Gallery + GIF Support

A photo gallery within the admin console of a CMS I created called Leaf. The gallery components takes uploaded images, and creates all the required dimensions for the website. It supports creating WebP versions of all images, as well as the usual PNG, JPEG, types. PDFs are also converted to JPEGs. If a GIF is uploaded, the animation is preserved and rendered. The GIF is also undergoes some lossless compression to make the animation load faster. Read more...

Backbone + WebSocket Single Page Application for Car Dealerships

Backbone + WebSocket Single Page Application for Car Dealerships

A online and packagable application built using Backbone.js + Marionette.js, running on a WebSocket enabled C#/SQL backend. Being a Single Page Application (SPA), the application runs very natively, with fast performance between screen loads, and can handle transient network errors as users dip in and out of WiFi coverage. Read more...

Responsive, Realtime, Customisable, Interactive Dashboard

Responsive, Realtime, Customisable, Interactive Dashboard

This is a dashboard for a health and safety monitoring product I built. It has numerous unique features, and complex backends since the dashboard must effortlessly crunch potentially large datasets and summarize them in simple tabular graphs or numbers. Read more...

Realtime two-way Android based Safety Monitor tablet.

Realtime two-way Android based Safety Monitor tablet.

An Android powered tablet client application that uses Google Cloud Messaging (GCM) to establish a two way realtime connection (using XMPP via the Android OS) to receive and relay events for essential safety monitoring. Due to the volume of data driven, and the number of simultaneous connections; it was essential this Android app would scale and be able to deliver and function 100% of the time, never with a chance of user data loss. The data could be processed in a powerful C# .NET backend. The server-side XMPP connection to GCM was also a C# .NET Worker Role, running in Microsoft Azure. Read more...

Multilingual Job Board with geospatial search capabilities.

Multilingual Job Board with geospatial search capabilities.

This job board aimed at supply chain roles in Europe is able to automatically display the language relevant to the current user, as well as offer sophisticated geospatial search tools. Jobs and Candidates are then auto-matched for each job based on currency/salary (the jobs can show their currency in any known currency available), skills, and location. Location is based on specified travel distance from the desired location, which could be specific towns or continents, to sorting the relevant jobs is priority. Read more...

Interesting Login Screen

Interesting Login Screen

This login screen makes things a little bit more interesting for the end users by displaying an inspirational photo on the login screen. The images would be sourced to show ones relevant to the user (such as from their own user-uploaded gallery) from where their previous login was identified but a password re-prompt is necessary for certain operations. Read more...

Quick and easy credit card payment page

Quick and easy credit card payment page

This simple, static, and responsive payment page allows customers to simply enter the value they need to pay and enter their payment information and complete payment with a single click. Read more...

Backbone + Marionette GitHub Repository List - Sample Application

Backbone + Marionette GitHub Repository List - Sample Application

Sometimes the best way to learn something is to study each component separately, this gives us a true in depth skill on how something specific works. However, putting these components together to make a full featured application is another ball game entirely. I've always maintained that Software Engineering isn't difficult, but it can be complicated - as a typical application will consume numerous different technologies from development stages, to deployment, to runtime. It's putting all these modules together that is the hard part. Read more...