Kevin Rhys Sadueste — SDET & Test Automation

Overview

What I Do

I'm a Software Engineer – Sr. Consultant/SDET at Visa Worldwide. I built VTAF, a unified test automation framework covering UI, REST, and SOAP layers, for a global payments dispute resolution platform running on Java/JVM and Python microservices, and integrated it into our CI/CD pipelines using Jenkins and GitHub Actions.

Over the last year, I've been bringing agentic AI into the QA workflow: connecting AI agents via MCP to automatically pull logs and cross-reference source code, and building agent skills (Markdown-based instruction files that double as a knowledge base) so the system can tell on its own whether a failed test is a real bug, a bad script, bad data, or an environment issue.

I've also worked as part of our Security team on SAST (Checkmarx) and SCA (Sonatype) findings, fixing flagged issues and building automation to test for them going forward.

I'm ISTQB Certified at the Advanced Level across both streams, with experience running teams as a certified Scrum Master.

Highlights

Explore what I've shipped

Real work projects and systems I've built to make QA faster and more reliable.

AI-Powered Failure Diagnosis

Agents connected via MCP that auto-fetch logs, JIRA tickets, and other knowledge bases, then cross-reference source code to classify failing tests as real bugs, script issues, bad data, or environment problems.

Unified Test Automation Framework

Architected VTAF end to end, UI, REST, and SOAP layers in one Cucumber BDD framework, for Visa's global payments dispute platform.

Code Coverage Dashboard

Built a dashboard tracking test coverage across Java/JVM and Python microservices, giving teams visibility into coverage gaps at a glance.

Experience

Career, run as a pipeline

Thirteen years, one build that keeps passing.

Software Engineer — Sr. Consultant Current

Visa Worldwide Pte. Ltd.

FEB 2025 — PRESENT · SINGAPORE

Extended VTAF with AI agents connected via MCP to auto-fetch application logs, cross-reference source code, and classify failed tests as real bugs, script issues, bad data, or environment problems.
Built agent skills (Markdown-based instruction files that double as a knowledge base) from years of JIRA tickets, user stories, and execution history, giving the AI agent the domain context to diagnose failures accurately.
Shipped a Microsoft Teams chatbot for on-demand regression and smoke test runs, including custom script triggers.
Built a code coverage dashboard spanning Java/JVM and Python microservices.
Worked with our Security team on SAST (Checkmarx) and SCA (Sonatype) findings, fixing flagged issues and building automation to test for them going forward.

Staff Software Test Engineer

Visa Worldwide Pte. Ltd.

AUG 2022 — FEB 2025 · SINGAPORE

Architected and maintained VTAF — a Java/TestNG/Cucumber BDD framework covering UI (Playwright/Selenium) and REST/SOAP layers.
Built and maintained CI/CD pipelines across Jenkins and GitHub Actions.
Served as Scrum Master for a cross-functional team of 7+, mentoring junior QA engineers.

Senior Software Test Engineer

Visa Worldwide Pte. Ltd.

FEB 2019 — AUG 2022 · SINGAPORE

Maintained BDD regression coverage across fraud disputes, pre-arbitration, pre-compliance, VDI score validation, and reporting flows.

Automation Engineer

Fluor Daniels Inc

OCT 2017 — FEB 2019

Designed and delivered a hybrid automation framework in UFT, unifying test scripts across all projects.

Test Analyst / Automation Lead

Macquarie Philippines

DEC 2016 — OCT 2017

Built a new automation framework using Ranorex and established team-wide automation standards.

Quality Analyst — Automation

Citco Group of Companies

AUG 2015 — DEC 2016

Built a test library architecture from scratch using UFT descriptive programming.

Quality Engineer

Misys Philippines (now Finastra)

JUN 2013 — AUG 2015

Tested core banking web and desktop applications within Agile teams.

Automated tests. Real coverage. Root causes found before they ship.

What I Do

Explore what I've shipped

Career, run as a pipeline

Core skills & technologies

What I'm certified in

Education

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