Jacob
Jay
Jacob Jay

Peripatetic British full-stack developer, designer and entrepreneur.
Specialising in web applications and usability.

3 Mobile projects

Hybrid Point-of-Sale for Paylinko

Create a platform enabling small businesses and contractors to take card payments in-person.

Innovations

  • Utilising RFID/NFC smartphones to improve customer interaction in completing payments, requiring development of both UX and API between the user-presented web interface and native routines in an app. Existing card payment UX (in the west) was limited to using a camera to capture the card details (rarely used) or manually typing details in, being unreasonable to expect both parties to have the same app/system (unlike developing countries, such as with USSD solutions).
  • The UX had to be carefully considered as it was taking place on a smartphone handed to the customer by their service-provider, in the manner of a bill to be paid there-and-then.
  • My solution simply involved tapping a contactless payment card to the phone and then entering the 3-digit CV2. The app having been developed to invoke the NFC card reading on the payment screen. Because this only reads the card details rather than using the encrypted contactless payments channel, payments could be settled in the usual manner, and for any value above the usual contactless limit.

Features

  • thin (hybrid) mobile app wrapping the website functionality with native NFC and camera card reading
  • backoffice to review submitted documents and automated account progression through third-party identity verification/KYC
  • short merchant-id generation for statements
  • third-party account settlements
  • overloaded the default status and error handling, redirecting to Slack for real-time devops and account insights

Links

2017 — Conception, Web, E-commerceSummary ↙︎
Details, 0 images

B2B Rental Marketplace for HSS

Bring an existing business department and its processes online and up-to-date using a marketplace mediating with third-party suppliers.

Innovations

  • Multiple pricing and comission models to support both owned assets and third-party assets
  • Per-class (category, product or variant) cascading inherited attributes, with ancestor and descendant overrides providing a variety of ways to control how suppliers add new items and values
  • Mediated messaging, with client-supplier messaging relayed through an operator
  • Supplier auctioning with deferred (countdown) booking assignments in cases of unknown availability
  • Collection options using geolocation
  • Flexible delivery class calculations assignable per-category and postcode
  • Geographical search ranking availability of items with delivery constraints
  • Ability for an operator to easily swap their CMS view to that of a supplier (delegate authentication) when handling operations by telephone

Features

  • Categorised product (and variant) listings with search
  • Bespoke CMS handling categories, products and their variants with dynamic attributes
  • Booking functionality (not calendared)
  • CMS and API for suppliers
  • Mobile app with push notifications and messaging for suppliers and customers
  • Multi-device and multi-role authentication and notification settings
2014 — Architecture, Web, E-commerceSummary ↙︎
Details, 10 images

API Gateway for Pixelpipe

An API gateway server accepting media uploads from clients using a wide variety of supported APIs, and re-broadcast them to well over 50 different service providers.

Innovations

  • Deferred batching to accept multiple uploads over a configurable timeframe, and then re-broadcast them together as an album or single blog post after no more items had arrived (instead of individually upon arrival).
  • Utilisation of special 'routing' tags, allowing uploaded media to be dispatched to specific accounts or groups of accounts simply using a tag, thus avoiding the need for specific client routing UI, and instead using a client's native tagging UI.

Features

  • Prioritised image processing queue with service provider connection constraints
  • Service provider error aggregation and reporting to quicly idenitfy and prioritise API issue resolution with destination service providers
  • Support for multitudinous client upload APIs including metaweblog and Flickr, which with DNS spoofing enabled official clients to be used with the server
  • Bespoke upload applications and Plug-ins including iPhone, Aperture, Windows Live Gallery and integration with Nokia share
  • Support for hosting uploads directly on the service, including views for user streams, albums and individual photos
2008 — Management, Server, PhotoSummary ↙︎
Details, 7 images