Available to hire
Hi, I am Daniel. I am a QA Automation and Full-Stack Engineer with 7+ years of experience testing and automating SaaS web apps across UI, API, and integration layers. I enjoy building scalable automation frameworks, improving CI/CD reliability, and weaving testing into Agile workflows.
I am proficient with Cypress, Selenium/WebDriverIO, Postman, JavaScript, and TypeScript, with a focus on accessibility testing and cross-browser validation. I am passionate about improving product quality, expanding automation coverage, and delivering reliable user experiences through collaboration and automation-first QA practices.
Skills
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Language
English
Fluent
Korean
Intermediate
Work Experience
Software Engineer III at Replicon
May 1, 2021 - May 1, 2025Strengthened SaaS platform security by implementing OAuth 2.0 authentication, mitigating >90% unauthorized access risk; built full-stack backend features and delivered iterative improvements from UI to backend APIs; led accessibility enhancements validated with WCAG 2.1; refactored backend workflows and schema versions, reducing processing time by 50%; built scalable cloud features using AWS S3 and DynamoDB.
Senior Software Engineer in Test at Replicon
April 1, 2018 - May 1, 2021Led end-to-end quality strategy for major product releases, designing automation and release validation processes that reduced production defects by 90%; rewrote 4000+ Java automation tests to a modern Node.js-based automation framework (Selenium/WebDriver), improving execution speed 3x and reducing maintenance effort by 80%; architected and built reusable automation test libraries adopted by global engineering teams, standardizing test patterns and eliminating duplicate implementations; implemented scalable cross-platform test infrastructure using AWS Device Farm, BrowserStack, and CI/CD integration, achieving 100% browser/device coverage; managed CI/CD test reliability and pipeline health, partnering with developers to resolve failures and sustain <2-hour deployment cycles.
Full Stack Developer Intern at Acuspire
May 1, 2017 - November 1, 2017Architected and launched an AI-powered job matching platform from scratch, leveraging Laravel/Vue.js stack to serve 10,000+ active users with 95% uptime.
Peer Tutor at Mount Royal University
January 1, 2015 - November 1, 2017Mentored CS students, improving average grades by 1+ letter grades (C to B+ / A-).
Computer Lab Technician at Mount Royal University
December 1, 2014 - May 1, 2017Provided technical support for networking, hardware, and system authentication issues.
Software Engineer III at Replicon
May 1, 2023 - May 1, 2025Led security improvements by implementing OAuth 2.0 authentication, mitigating over 90% of unauthorized access risk. Identified and remediated critical security flaws via rigorous penetration testing, improved accessibility across the UI, and refactored backend workflows to reduce processing time by 50% while building scalable cloud features with AWS (S3, DynamoDB). Drove feature-flag deployments for faster releases and collaborated with QA and development teams on release validation and post-release testing.
Senior QA Automation Engineer at Replicon
April 1, 2018 - May 1, 2023Led test automation for enterprise SaaS products across web, mobile, and API platforms. Built and maintained automation frameworks using Selenium, Cypress, WebDriverIO, Jest, and Playwright. Reduced production defects by 90% through automated regression testing; migrated 4000+ legacy Java tests to WebDriverIO and Playwright, cutting CI/CD time from 8 hours to 2 hours. Improved automation stability by logging flaky tests and adding retry coverage; performed cross-browser and mobile testing with BrowserStack and AWS Device Farm. Mentored junior QA engineers and owned QA sign-off for major releases.
Education
Bachelor of Computer Information Systems, Minor in Business Administration at Mount Royal University
January 1, 2015 - January 1, 2017Bachelor of Computer Information Systems at Mount Royal University
January 1, 2015 - January 1, 2017Qualifications
Industry Experience
Software & Internet, Computers & Electronics
Skills
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