Summary
Overview
Work History
Education
Skills
Personal Background
References
AWARDS RECEIVED
Timeline
Generic
Marvin Julius Lee Siy

Marvin Julius Lee Siy

Application Developer
Singapore

Summary

IT professional with over 15 years of experience in the banking IT sector, specializing in AS400 and mainframe applications. Proven ability to address complex challenges with strong focus on collaborative team approach. Committed to delivering optimal results in fast-paced, deadline-driven environments while driving project success.

Overview

17
17
years of professional experience

Work History

Application Developer

Aurumjin Consulting Pte Ltd
07.2025 - Current

• Assigned to United Overseas Bank (UOB) and provided system and technical support on the in-house IAG (integrated Architecture Gateway) application, which acts as a middleware and facilitates MQ connectivity between various banking applications, mainly focusing on AS400 and Mainframe applications.

Application Developer

Peter Klare Consulting Pte Ltd
05.2016 - 06.2025

• Assigned to United Overseas Bank (UOB) and provided system and technical support on the in-house IAG (integrated Architecture Gateway) application, which acts as a middleware and facilitates MQ connectivity between various banking applications.

• Provided support on Business As Usual (BAU / Production) Testing, System Integration Testing (SIT) and User Acceptance Testing (UAT) of various projects by maintaining various Host Application Handlers, monitoring Online and Batch program activities and investigate connectivity issues.

• Worked closely with the EAI (Enterprise Architecture Initiative) in troubleshooting various non-AS400 applications such as Linux, Java, Mainframe that are connecting to AS400 applications, which involves operating a Unix-based in-house application to troubleshoot the application involved in the connectivity issue.

• Reviewed Functional and Technical Specifications document of various projects to understand the requirements, process, and overall workflow of various banking transactions.

• Maintained AS400 objects to be used on SIT and UAT via Aldon Change Management system.

• Maintained Mainframe objects to be used on SIT and UAT via CA Endevor Software Change Manager (SCM).

• Mainly working on AS/400 RPG/400, RPG/ILE, Control Language (CL) programming, QRY/400, SEU/400, DB2 AS/400.

• Experienced in debugging RPG and CL programs using STRDBG (Start Debug) and STRISDB (Start Interactive Source Debugger) commands.

• Created job aid documents on various adhoc support tasks in order to improve the functional knowledge in working around various issuesand improve support turnaround time.

• Supported the following projects:
> Misys GEB (Global e-Banking) Overseas
> Misys GEB Malaysia
> Misys GEB Thailand
> PIB (Personal Internet Banking) Vietnam
> PIB (Personal Internet Banking) Malaysia
> CardLink V2 Project Thailand
> Cash Management Roadmap Project
> FINANS Migration to CardLink Malaysia
> VOYAGER Project - FITAS to TRD Migration
> Constellation Project - CITI to UOB Migration SG, TH, MY, ID, VN

> Electronic Deferred Payment Project Singapore

Programmer Analyst

D L Resources Pte Ltd
07.2015 - 01.2016
  • Assigned to Overseas Chinese Banking Corporation (OCBC) and provided system and technical support on Electronic Banking System (EBS) module of Silverlake Intergrated Banking System (SIBS).
  • Provided support on System Integration Testing (SIT) and User Acceptance Testing (UAT) of various projects by maintaining various EBS Online Handlers, monitoring EBS Online and Batch program activities and used STRDBG to investigate issues.
  • Reviewed Functional and Technical Specifications document of various projects to understand the requirements, business process, program workflow, user interface design and ensure quality.
  • Performed testing on various Visa/MasterCard Debit and Credit Card transactions using the Visa Simulator and MasterCard Authorisation Simulator.
  • Performed embossing of various Debit Cards for testing via GemSense DP Client.
  • Provided test scripts to be used in HP Quality Center (HPQC) and performed the System Integration Testing (SIT) of the given project requirement and development.
  • Maintained AS400 objects to be used on SIT and UAT via Aldon Change Management system.
  • Created job aid documents on various EBS support tasks in order to improve the functional knowledge in working around with EBS and improve support turnaround time.
  • Supported the following projects: MAS Savings Bonds, MCCS Phase 1 and 2, MY116 Debit Card Project, FEAT SG Project, EMV CUPS Liability

Software Engineer

Misys Philippines
06.2014 - 07.2015
  • Part of the 8-member Configuration Management and Release Management Team, and currently assigned to support handle queries of Asia-Pacific and selected Europe clients.
  • Involved in various Midas R4 system, Misys Meridian, and Misys Message Manager setup activities. Setup activities include setting up the Meridian and Message Manager repositories, MQ (Websphere, iSeries), WAS console management and system sanity testing.
  • Technical exposures include RPG/400, RPG ILE, CL, Midas, MidasPlus, BankFusion Midas, Tortoise SVN, WinMerge, IBM RDi (Eclipse-based), iSeries Navigator, IBM WSDC, IBM Websphere MQ, iSeries and IBM Websphere Application server management. Also, I am familiar in the Java objects framework of various Midas releases (1.2.1, 1.4, 11.06, 2.0).
  • Performs the creation and deployment of RPG and Java objects (JAR, EAR, XML, etc.) to the various systems of different configurations in the iSeries and Websphere Application Server (WAS) platform owned by stakeholders, which also includes, but not limited to: conversion and generation of Webfaced objects into EAR file/s, SQL script and DBLoader deployment.
  • Maintains an internal System Integration Testing (SIT) / User Acceptance Testing (UAT) Midas environment, wherein I provided support to the QA team during software testing by performing the creation and installation of various Midas iSeries and Java objects (JAR, EAR, XML, etc.), maintaining Midas objects builds, and maintenance of the Midas environment’s settings in the iSeries machine and WAS console.
  • Maintain the Websphere MQ, MQ listeners, and MQ channels used in transmitting and receiving messages sent by the Misys MCP and MUHB programs.

Associate Software Engineer

Misys Philippines
11.2010 - 06.2014
  • Part of a team of 7 to 10 within the Midas Banking Software Maintenance Team as RPG developer, wherein I fixed various Midas software defects of various Midas releases, which includes Midas and Midas Plus.
  • Development activities include debugging via STRDBG and STRISDB, coding, testing, creation of test plans and technical documentation of the overall development done for internal and external stakeholders. Ensured that the activities done are in line with development standards and functional specifications of the Midas software.
  • Functional exposure to Midas software includes Dealing, Funds Transfer, API, SWIFT messaging.
  • Liaison with various external and/or internal technical and non-technical stakeholders to ensure that requirements are understood, while taking into account the agreed productivity targets and development timelines. CRM tools such as Salesforce and JIRA are being used to manage various requirements. I have also formerly used CollabNet TeamForge prior to JIRA.
  • Selected clients handled: Raiffeisen Bank International AG, Oversea-Chinese Banking Corporation, Indian Overseas Bank, Volksbank / Sberbank, Norddeutsche Landesbank, UBS AG, Rabobank International

Support Consultant

Misys Singapore
12.2013 - 03.2014
  • Seconded to Misys Singapore office and become a part of the Midas Application Support Team focusing on Asia-Pacific clients.
  • Provides technical support to clients while managing client defects in order to ensure that resolution is provided on time.
  • Involved in the deployment of RPG and Java programs in order to correct defects in the Midas banking software.
  • Responsible for maintaining client-specific Midas sources.

Trainee

Misys Philippines
08.2010 - 11.2010
  • Underwent training on CL, RPG/400, RPG ILE programming and elementary exposure to the Midas banking software.

Intern

Level Up! Inc.
01.2009 - 04.2009
  • Part of the Product Development team. Performs quality assurance testing and defect management on the company’s products.

Education

Bachelor of Science - Computer Engineering

De La Salle University – Manila
Manila, Philippines
06.2010

High School Diploma -

Hope Christian High School
Manila, Philippines
03.2005

Skills

AS/400

RPG/400

RPG/ILE

QRY/400

SQL/400

DB2 AS/400

COBOL

JCL

CICS

Aldon CMS

CA Endevor SCM

BMC Control-M

BMC Remedy

JIRA

Personal Background

Languages spoken are English, Filipino, Mandarin, and Philippine Hokkien.

References

Available upon request.

AWARDS RECEIVED

December 2025

Electronic Deferment Payment Project - Team Initiative Award

To celebrate teams that exemplify outstanding collaboration, innovation, and commitment in delivering solutions, increasing productivity, or making a significant positive impact across the bank.


December 2021

FINANS Migration to CardLink Malaysia – Value Champion Team Award

The scope of migration includes conversion of all FINANS card portfolio into CARDLINK II and into Regional BLP for Loyalty.
It also includes 21 interface systems, 93 Online Services and 1200+ batch interfaces


November 2013, June 2014 

MIDAS DEVELOPMENT MAINTENANCE – KUDOS AWARD – HIGHEST PRODUCTIVITY AWARD, Award given for fixing a number of defects beyond the prescribed requirement during a given quarter of the company’s fiscal year, while exhibiting the company’s cultural belief of “Win Together”.

Timeline

Application Developer

Aurumjin Consulting Pte Ltd
07.2025 - Current

Application Developer

Peter Klare Consulting Pte Ltd
05.2016 - 06.2025

Programmer Analyst

D L Resources Pte Ltd
07.2015 - 01.2016

Software Engineer

Misys Philippines
06.2014 - 07.2015

Support Consultant

Misys Singapore
12.2013 - 03.2014

Associate Software Engineer

Misys Philippines
11.2010 - 06.2014

Trainee

Misys Philippines
08.2010 - 11.2010

Intern

Level Up! Inc.
01.2009 - 04.2009

Bachelor of Science - Computer Engineering

De La Salle University – Manila

High School Diploma -

Hope Christian High School
Marvin Julius Lee SiyApplication Developer