Software Engineer Development

SUN FAI OSKAR WONG

Seattle, WA, United States

+1-416-***-**** *****.****@**.*** altawoz.com linkedin.com/in/oskarwong Software Engineer

Experienced Software Engineer with over 15 years in software development and quality assurance. Specializes in designing and delivering secure payment systems, scalable cloud solutions, and full-stack applications across fintech, insurance, and e-commerce sectors. Demonstrates expertise in Java, PHP, AngularJS, NodeJS, React, and mobile development. Adept at creating high-volume, mission-critical platforms, automating workflows, and achieving tangible business results. Core Competencies

Java / Spring Boot Development Full-Stack Web Development Payment & Fintech Solutions Program Management Customer Relations AWS Cloud Infrastructure Machine Learning & AI Continuous Improvement Database Management Business Strategy UI/UX Improvements Risk Mitigation Professional Experience

Mitsui Sumitomo Insurance Group Holdings, Inc, Hong Kong, China May 2025 – Aug 2025 Software Engineer– Frontend DevOps

• Develop a robust web service using Angular and C# to improve user experience and reduce the workflow by 20%.

• Integrate cloud solutions with AWS and Azure optimize performance and scalability, reducing server overhead by 25%.

• Renew and manage the company portal by enhancing accessibility and user engagement, which led to a 5% increase in sales and a 4% reduction in backlog. Vigor Gems and Jewelry Limited, Toronto, ON June 2023 – May 2025 Full Stack Developer – AI Integration

• Designed and implemented customer management databases using NoSQL and NodeJS, enhancing lead tracking by 20%.

• Developed and deployed mobile-friendly web platforms, improving client acquisition by 30% through data-driven marketing strategies.

• Automated business workflows using LLM-powered tools, reducing manual workloads and improving decision-making accuracy.

Payment Asia Services Limited, Hong Kong, China June 2017 – May 2023 Software Engineer – Full-stack skillsets

• Designed, developed, and maintained secure payment gateway systems using Java, Spring Boot, and microservices architecture, handling over $30M monthly transactions.

• Led full SDLC activities, including requirements gathering, system design, coding, testing (UAT), deployment, and production support.

• Built scalable backend services integrated with MySQL and NoSQL databases, optimizing transaction speed and security.

• Deployed AWS-based solutions, managing EC2, RDS, and Lambda environments, while maintaining source code using GitHub and AWS CodeCommit.

• Researched and applied security and performance upgrades to ensure PCI compliance. Jewelectric Limited, Los Angeles, CA June 2014 – Mar 2016 Co-Founder – Project Management and Engineer

• Developed a Bluetooth-enabled mobile application for wearable devices using Objective-C and Java, achieving MFi certification.

• Conducted technical research and managed full-cycle hardware-software integration projects. SUN FAI OSKAR WONG

Professional Experience (Cont.)

• Led agile-driven product development cycles and established strategic partnerships to accelerate market entry.

Vigor Gems and Jewelry Limited, Hong Kong, China Sept 2009 – Aug 2014 Digital Marketing Executive – Full Stack Web Developer

• Executed multi-channel marketing campaigns (digital, print, and events), increasing qualified leads and improving customer retention 40% through targeted engagement strategies.

• Developed and optimized web platforms using HTML, CSS, JavaScript, AJAX, and PHP, ensuring SEO best practices and maintaining website integrity, boosting site traffic.

• Managed international brand presence across major trade shows. Chicboite Limited, Hong Kong, China (Freelance) July 2017 – Aug 2023 Software Engineer / Project Manager

• Built and scaled eCommerce platforms (React, Node.js, WordPress, WooCommerce, Shopify)

• Developed iOS app (Swift/Objective-C) integrating with cloud services.

• Led requirement discussions and documented technical specifications, streamlining project deliveries.

• Automated market intelligence via Python web scraping with AWS Lambda Education

Georgian College, Barrie, ON, Canada May 2023 – Dec 2024 Diploma, Computer Programming

University of Southern California, Los Angeles, CA Sept 2003 – Dec 2004 Bachelor, Business Administration and Management

Skills

• Programming Languages: Java (Spring Boot), Python, NodeJS, Swift, Objective-C, PHP, JavaScript

(ReactJS), C#, C++, Bash/Shell,

• Web Development & Front-End: HTML, CSS, AJAX, JSON, jQuery, ReactJS, AngularJS, WordPress, Shopify, WooCommerce.

• Back-End Development & Databases: NoSQL, MySQL, SQL, PHP, PHP Frameworks, C#

• Cloud Infrastructure: AWS (EC2, RDS, EKS, S3), Docker, Kubernetes, GitHub, AWS CodeCommit

• Tools & Frameworks: Spring Boot, Microservices, REST APIs, Agile Methodologies

• Machine Learning: PyTorch, LLMs, AI Model Customization, Functional Programming

• Mobile App Development: iOS (Swift, Objective-C), Android (Java, Kotlin), React Native

• Business Experience: Project Management, Business Development, Client Relations, Agile/Lean, Software Development, Risk Management, Mentoring, Budgeting & Scheduling, and Forecasting.

• Languages: Native speaker in Cantonese, fluent in Mandarin and English.

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