Jun Sun Email & Phone Number

Toronto, Ontario, Canada

Halifax, Nova Scotia, Canada

1. Assisted clients in product definition including business domain, actors, business rules and processes. Designed the system architecture including CRM, Billing, Ticketing, Inventory and interfaces. Designed the database E-R model of Product, Order, Billing and Accounting modules2. Developed core microservices such as Product, Order and Billing, and provided advanced RESTful APIs to the front end and other services3. Developed some fundamental codes, such as logging all external interfaces through AOP, handling business interruption exceptions through ExceptionHandler, unifying error codes and JSON response structure, etc.4. Maintained the legacy takeaway platform and technically assisted in the transfer of the business to another company

Beijing, China

1. Designed forward-looking solutions and systems for various application scenarios of billing and settlement such as prepaid/post-paid, by-times/by-amount, segmented, accumulative segmented, and multi-partner. The postpaid billing microservice not only served our company but also sold to another 3rd payment company2. Developed real-time billing and batch settlement microservices, provided RESTful APIs, integrated Alipay and WeChat Pay. They are serving millions of users with 99.9% availability3. E-R data modelling, optimized MySQL through indexes, table sharding, read-write separation, etc.4. Practiced Continuous Integration (CI) and collaborated with the customer support team to assist users with in-depth technical troubleshooting

Beijing, China

Drafted the business plan and got management approval after market research and consultation. The business provides financing services for SME by business process reengineering of cargo supply chain finance, and applying cutting-edge technologies such as Blockchain, Internet of Things and big data, as well as the establishment of reliable clubs, inferior funds and industrial digitization

Beijing, China

1. Established a new business in 6 months: built a team, redesigned the business process for private broadband operators, released online Business Support System, signed 2 seed customers and received 2 monthly bills2. Developed the back-end billing module using C++ and Lua language based on the self-developed distributed computing platform, tested and released the module with a front-end software engineer, and integrated with on-premise AAA through VPN3. Pioneered to adopt the software-as-a-service (SaaS) model and won seed customers in the new market. As a result, our team won the "Innovation of the Year" prize4. AsiaInfo is the second-largest BSS/OSS provider in the world and Amdocs in the US is the largest one

Beijing, China

1. Delivered 5 MVNO projects with a total amount of around C$3.9 million, including 1 business consulting project, 2 system implementation projects, and 2 years of operation and maintenance services2. Assisted the sales manager to win 4 follow-up contracts by achieving project and key stakeholder success

Beijing, China

1. Established a technical team of 23 people including requirement analysts, developers, implementation engineers, operation and maintenance engineers, and successfully implemented 13 projects with a total amount of C$10 million2. Shortened the software development period of settlement project by 60% while meeting the various customization requirement of VIP customers by integrating the Lua language as a rule engine and developing a cross-platform multi-partner settlement middleware that can run on Linux / IBM AIX / HP-UX platforms3. Advocated cloud computing and initiated the development of a distributed computing platform (Huge, how it works) for telecom big data such as billing, settlement and anti-fraud in the telecom industry in 2008, compatible with Hadoop, and successfully applied it to 3 China Unicom projects4. Improved the expandability of the Huge Map module by applying the responsibility chain pattern so that the application can easily add, remove and arrange the CDR-level computing functions. Made the RPC (Remote Process Call) easier by integrating ACE framework (CORBA)5. Received "Employee of the Year" in each year from 2008 to 2010 and was part of a team named "Customer Service Team of the Year".