Patrick Koh Email & Phone Number

ACCOMPLISHMENTS• Successfully maintained web service applications with minimal issue due to internal factors• Developed application monitoring tool, allowing production issue to be detected and resolved promptly• Introduced processes which saved development timeRESPONSIBILITIESRedeployed to vendor Tech Mahindra on 6 months contract (Jan 2017– Jul 2017)- Continued with previous responsibilities of web service applications maintenance- Performed knowledge transfer and mentoring to offshore development team- Analysed and identify root cause of application production issue of new application- Assisted in user data migrations- Provided effort estimation of development effort- Developed automated application monitoring tool for new application- Performed code reviewMaintained web service applications (May 2014 – Jan 2017)- Responsible for two web service applications (used by mobile app, interactive SMS/USSD and web portals), related batch processes and Linux scripts- Analysed, developed, performed SIT and UAT support applications for change requests- Investigated application production issue, liaising with vendors and users to resolve the issue- Administered application server, performing deployments, troubleshooting connectivity issue- Updated documentation for API and process changes- Performed code analysis to help document existing application logic for application migration

Accomplishments• Successfully completed change requests with pressing deadlines and achieved low defect rate• Successfully found root cause and fixed longstanding bug and performance issue• Generated accurate SQL queries for post deployment monitoring, saving effort for company and users• Recommended method to solve coding standard issue, saving development time• Received several performance awards• Converted from contract employment to permanent positionResponsibilitiesDevelopment of Immigration and Checkpoints Authority system using Java (Jul 2011 – Apr 2014)-Developed back-end logic in web service-Developed batch jobs using Spring Batch, Hibernate, processing data from external systems-Assisted in reducing coding standard violations, increasing unit test coverage and pass rate for Java and C# codesMaintenance of Ministry of Manpower's Employment Pass Online using Java (Apr 2008 – Jun 2011)-Developed change requests to update application according to changing business requirements-Helped perform impact analysis and effort estimation-Develop web based forms using JSP, Struts-Develop validation of form input using Oracle packages-Develop back-end rules processing using Blaze Advisor-Develop document using Hyperion SQR-Develop back-end batch job for calculation of Employment Pass quota and levy calculation-Perform SIT and supported UAT and post deployment monitoring-Updated specifications document-Provided L3 support for production application issues

Accomplishments• Help stabilised system which enhanced user experience• Developed several utilities like report generation engine which provided cost savings by removing need to purchase commercial products, saved development time and prevented bugs Maintenance of existing Freight Management System using ColdFusion-Develop enhancements according to user requirements-Troubleshooting application issues reported by user-Fine-tuned SQLs-Administered Fedora server, PostgreSQL database-Provided IT supportDeveloped new Freight Management System using Java-Developed Ajax enabled web forms using ExtJs-Developed reports and documents using JasperReports

Testing of Ariba Buyer Spend Management System, with emphasis on Internationalization-Prepared and execute test cases-Filing of detailed bug report

Bachelor Of Engineering (B.Eng.), Computer Engineering

A Levels

O Levels