Wai Keong Cheong | Freelancing Malaysia

Wai Keong Cheong Backend Software Developer

33 years experience 0 projects worked Malaysia

RM150.00 /hr RM0 earned

API

30+ years of software engineering experience, with extensive recent experience building and maintaining backend systems in Go.

Core skills:

Go / Golang backend development
Linux systems and production troubleshooting
REST APIs and backend services
Concurrent and stateful backend systems
Distributed systems and high-availability services
TCP/IP, networking and network services
SIP / VoIP / Asterisk / telephony systems
Redis and PostgreSQL
Docker and AWS
Multi-tenant SaaS systems
API integrations and third-party services
Performance, reliability and production debugging
AI/LLM, speech-to-text, text-to-speech and machine translation integrations

Experienced working with existing production codebases, investigating difficult operational problems, implementing features, and taking ownership of backend systems from development through production.

Work History (0)

There are no activities yet.

Work Experiences

Add work experience to your profile. (optional)

Analyst Programmer
MBf Information Services
October 1993 - August 1995
Part of development group working on client server based back teller system.
Developed programs in C/C++ on Windows and SCO UNIX. Part of system and network administration team.
Assistant Database Administrator.
Analyst Programmer
Time Quantum
August 1995 - December 1996
Developed GUI front end applications for telephony network management system using
C++ with Motif on SUN and HP UNIX platform. Developed applications using HTML.
System Consultant
LHS Sdn Bhd
December 1996 - January 1998
Develop and maintain GSM mobile phone charging and billing system.
Product is developed using C on HP/UX
Development Engineer
Comverse Network Systems
February 1998 - October 2005
– Develop and maintain telephony voice mail system.
– Design, develop and maintain telephony conference call system.
– Products are developed in C/C++ on SCO Unix
Senior Application Consultant
Planet PSG
October 2005 - November 2006
Design, develop and maintain Caller Ring Back Tone System.
Develop and deployed applications for Caller Ring Back Tone System. Applications are developed in C++, Java, Javascript and Oracle in Sun Solaris
Team / Technical Lead
Nokia Siemens Networks / Nokia Solutions and Networks
December 2006 - June 2014
• Led development of high-availability C based HLR and X.500/LDAP-based subscriber data platforms used by global telecom operators.
• Maintained large-scale distributed backend systems and provided Tier-4 production support for mission-critical deployments.
• Led feature development, defect resolution and automated test framework improvements across Linux and Solaris environments.
Senior Software Developer
Cention Sdn. Bhd
August 2014 - April 2026
• Developed and maintained Go backend services for a cloud-based customer communications platform.
• Designed backend components supporting SIP call routing, IVR, recording, monitoring, statistics and real-time telephony workflows.
• Integrated and evaluated speech recognition, language translation, text-to-speech and LLM services to support multilingual communications features and automated call classification workflows.
• Migrated legacy single-tenant platform into a multi-tenant SaaS architecture on AWS.
• Developed and maintained SMPP messaging services including throttling, retry handling and delivery tracking.
• Developed integrations with external CRM and telephony providers.
• Built diagnostic utilities and log analysis tools to investigate and resolve production issues in AWS environments.
• Frequently entrusted to independently investigate and resolve critical production incidents.

Education

Add work education to your profile. (optional)

Bachelor of Science, Computer and Information Science
University of South Alabama, Mobile, Alabama, United States of America
September 1991 - August 1993
Graduated cum laude

Profile of Wai Keong Cheong

Work History (0)

Work Experiences

Analyst Programmer

MBf Information Services

October 1993 - August 1995

Analyst Programmer

Time Quantum

August 1995 - December 1996

System Consultant

LHS Sdn Bhd

December 1996 - January 1998

Development Engineer

Comverse Network Systems

February 1998 - October 2005

Senior Application Consultant

Planet PSG

October 2005 - November 2006

Team / Technical Lead

Nokia Siemens Networks / Nokia Solutions and Networks

December 2006 - June 2014

Senior Software Developer

Cention Sdn. Bhd

August 2014 - April 2026

Education

Bachelor of Science, Computer and Information Science

University of South Alabama, Mobile, Alabama, United States of America

September 1991 - August 1993

Welcome back!

Send an email to this freelancer

Select project(s) to invite Wai Keong Cheong to join

Forgot Password?

Send Message