About Me

Building teams that ship to millions. Going deep on AI.

Engineering teams that shipped to millions across Asia. Led delivery for UOB digital banking across 5 countries, worked on Singpass and Corppass, the apps Singapore residents use to log into government services.

I like sitting between the tech and the product side, figuring out what to build, not just how. I go into the code when the team needs it. I piloted an LLM-based document verification workflow, saw the business impact firsthand, and want to keep driving that kind of value.

After leaving HCLTech in Aug 2025, I traveled, picked up new certifications, and moved to Sydney as an Australian PR in Jan 2026. Going deeper on agentic AI (Bedrock, LangChain, RAG) and open to Engineering Manager roles where delivery, team growth, and AI adoption are the mandate.

David Reuel Villamayor
LeadershipCross-functionalMentoringTechnical RoadmapsDelivery at Scale
TechnicalAWSAgentic AIPythonTypescriptReactJava
DomainDigital BankingFinTechIdentity SystemsFraud Prevention
Shipped forUOBSingpassCorppassAIA

Work Experience

May 2023 -Aug 2025
  • Managed 3 cross-functional squads (20+ engineers) across design, dev, testing, and deployment.
  • Owned end-to-end engineering delivery for UOB's digital banking platform across 5 ASEAN countries (mobile, web, and branch channels), serving 8 million customers.
  • Directed the design and delivery of an LLM-backed document verification pilot (Bedrock, LangChain, RAG), replacing manual eligibility checks in account opening and targeting a 25% reduction in staff processing time.
  • Awarded Certificate of Recognition for Performance Excellence (Mar 2024).
Nov 2016 -Dec 2022
  • Drove delivery of Singpass enhancements for 5M+ users, including QR login handling millions of daily authentication requests.
  • Directed the full AWS Cloud migration of Corppass, streamlining access for 200k+ businesses.
  • Championed a modernisation initiative on Corppass to eliminate overnight batch processing, delivering real-time results for 200k+ businesses.
  • Owned technical design decisions, code reviews, and release governance; mentored junior engineers and managed vendor relationships.
Mar 2015 -Oct 2016
Apr 2011 -Feb 2015

Credentials

Generative AI Leader

2025

Google Cloud

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SAFe 6 Agilist

2025

Scaled Agile

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Professional Scrum Master I

2025

Scrum.org

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Contact Me

Let's talk.

Hiring manager, engineer, or just want to chat? Drop me a message and let's connect.

Designed & built by David Reuel Villamayor

Built with Next.js · Tailwind CSS · Deployed on Vercel