David Reuel
Villamayor

Engineering Manager · Technical

I grow engineers and ship software millions depend on. More than a decade leading delivery across banking and digital identity in Asia, from hands-on architecture to running cross-functional teams. Now in Australia, using AI to sharpen how teams ship.

Open to EM & Technical EM roles

Sydney, Australia · Australian PR

LinkedIn GitHub Resume
15+ years in
engineering
25+ engineers
led & grown
8M+ banking
users served
5 ASEAN
countries
Shipped for

About

I lead teams that
ship and grow.

David Reuel Villamayor

I build and lead engineering teams that ship at scale, and I care as much about the people as the output. I led end-to-end delivery for UOB, one of Southeast Asia's largest banks, across 5 ASEAN countries. Before that I worked on Singpass and Corppass, the apps that let Singapore residents securely access government and private-sector services.

What I optimise for: engineers who grow faster than they expected to. I run teams where ownership is real, feedback is direct, and seniors turn into leads. I sit between tech and product, deciding what to build and not just how, and I stay technical enough so I lead from the engineering reality, not above it.

Since HCLTech I've been building with AI to learn first-hand what it does for a team and a business. I moved to Sydney in January 2026 and found that a decade of compliance-heavy, multicultural delivery in Singapore maps closely to how engineering teams operate here. Looking for a role where I can own delivery, grow the team, and invest in the people doing the work.

How I Lead

The way I
run a team.

01
People first, then the work

I measure the job in engineers who grew, not just features that shipped. 1:1s aren't status meetings; they're where careers get built.

02
Technical, not detached

I stay close to the code and the hard architecture calls, so I lead from the team's reality instead of above it. That depth is how I make better decisions, faster.

03
Clarity over process

Teams move fast when they know what matters and why. I cut ceremony, make priorities legible, and protect focus so the team can do its best work.

04
Direct, kind feedback

I'd rather have the hard conversation early than let a small problem calcify. Candour is a form of respect, and it's what lets a team trust each other under real pressure.

Experience

Where I've
done the work.

May 2023 – Aug 2025
Technical Lead, Engineering Management
HCLTech Singapore

Led 3 cross-functional squads, 25+ engineers, owning UOB's digital banking platform across 5 ASEAN markets serving 8M customers and hardening defences against a USD 1.7B pan-ASEAN scam landscape.

  • Grew seniors into squad leads through weekly 1:1s and a clear growth framework, keeping the bar high under live banking deadlines.
  • Architected account-drainage detection to identify and block high-risk transactions before funds are drained. Article Watch
  • Delivered facial biometric authentication to secure high-value mobile transactions. Awarded for Performance Excellence. Article
  • Led the Citibank-to-UOB migration, coordinating delivery across squads to onboard 2.4M retail customers onto UOB's platform. Article
Nov 2016 – Dec 2022
Application Development Specialist
Accenture Singapore

Led a 20-engineer squad on Singapore's national digital identity platforms, Singpass and Corppass.

  • Delivered Singpass QR login for 5M+ users at millions of daily auth requests, upholding security and WCAG-AA accessibility.Article
  • Directed the AWS cloud migration of Corppass, streamlining access for 200k+ businesses.Article
  • Championed a modernisation initiative to replace overnight batch processing with real-time results.
Mar 2015 – Oct 2016
Software Developer Senior Analyst
Accenture Philippines

Built client-facing applications across multiple financial services delivery tracks.

  • Delivered AIA Vitality integrations, linking activity tracking and rewards fulfilment into the core insurance platform.
Apr 2011 – Feb 2015
Software Design Engineer
NEC Telecom Software Philippines

Developed Java applications for NEC's MS5000 R10.0 radio telecom platform.

  • Earned the Presidential Award for product quality and on-time delivery under tight timelines.

Projects

Things I've
built and shipped.

Live
Bank Statement
AI Agent

Upload a bank statement, get back a categorised breakdown. Multi-step agentic reasoning streams in real time so you can watch the model reason as it works. Multi-model support. Just upload a PDF.

Decision: streamed the reasoning loop instead of hiding it. Trust in a finance tool comes from showing the work, not a black-box answer.

Agentic AI ReAct Loop Python Next.js
Live
PDF
Redactor

Drag to highlight any text and black it out with one click. Names, addresses, account numbers. The text is permanently removed from the file, not just hidden. Everything runs in your browser. Your PDF never leaves your device.

Decision: kept all processing client-side. A redaction tool that uploads your sensitive doc defeats its own purpose.

Python FastAPI PyMuPDF PDF.js
In Progress
Cross-Functional Software
Delivery Crew

An EM question turned into a build: how much of the first sprint can AI absorb? This crew takes a raw PRD and does the delivery prep work autonomously. One agent stress-tests the feature for edge cases and business value. A second proposes data models, API contracts, and infrastructure. A third reviews the architecture against OWASP top 10. Output is Jira-ready tickets. The goal is to cut the overhead that eats team velocity before a line of code is written.

EM framing: modelled the agents on a real squad's roles. The value isn't the code, it's the question: where does AI reduce engineering overhead without reducing ownership?

CrewAI Multi-agent AI Agentic AI Python OWASP

Skills

Skills &
Technologies.

Domain
Digital Banking FinTech Gov Digital Services Fraud Prevention
Leadership
Team Building Coaching & Growth Performance Management Delivery at Scale Stakeholder Mgmt Technical Roadmaps
Technical & AI
Agentic AI AWS Python TypeScript React Java Spring Kotlin

Contact

Let's talk.

Happy to talk about new opportunities in engineering management, team structure, or building AI tools. Sydney (AEST/AEDT). I reply to every email within 24 hours.

davidreuelvillamayor@gmail.com