Andrew Holman

Designed and developed components for a microservices architecture.

Created discoverable services using Netflix Eureka.

Development of web services using Rest and JSON.

Designed and developed a system for delivering notifications to various services. Using Apache ActiveMQ and Apache Camel. Integrated it into the existing architecture.

Lead developer for the design, development and maintenance of a telephony platform. Backend (Linux, C) and front end (iOS, Android). The platform served 150,000 customers and generated $12M revenue per year.

• System consists of a telephony server using SS7 signaling to the telco network and written in C under Linux. Hosted on multiple load-sharing hardware it has a web services interface for credit card top-ups. A MySQL database is used to store transactions, customer data, account data, a secure PIN and multiple products.

• Development of an interface with Aculab device drivers for telephony signalling.

• Design and development of a gateway between SIP and PSTN.

• Web services interface designed and developed.

• Application design: Call card applications designed and developed for Android and iOS.

Integrated into the application lifecycle concept, design, build, deploy, test and release to the Apple App Store and Google Play. The applications use the VOIP/SIP protocol to communicate with a SIP proxy and JSON to communicate with web services to obtain account status. The applications also interface with a payment gateway to apply credit to the account.

Developed enhancements to an IVR menu based system written in Java and using voice XML running on a Jboss application server to provide increased flexibility.