Open to opportunities

Michael User

@michaellee20

Message

Results-driven Senior Software Engineer with expertise in high-performance applications.

Belgium

Message

What I'm looking for

I am looking for a role that fosters innovation, collaboration, and growth opportunities.

I am a results-driven Senior Software Engineer with over 9 years of experience in developing high-performance applications for Fintech, E-commerce, and Gaming platforms. My expertise lies in Node.js, TypeScript, Python, React, and PostgreSQL, with a strong focus on microservices architecture and event-driven systems. I have a proven track record of architecting real-time payment solutions and optimizing transaction flows, leading cross-functional teams to deliver scalable and secure solutions.

At Opus Online, I architected a real-time On/Off ramping payment gateway, achieving reduced average latency and handling over 50,000 transactions per minute. I designed a high-availability online banking platform ensuring 99.99% uptime and full PCI DSS compliance. My leadership in reengineering a legacy monolithic core banking system into containerized microservices improved deployment frequency significantly. I am passionate about implementing CI/CD pipelines and performance monitoring initiatives that enhance operational efficiency.

Previously, I worked at Sporty Group, where I developed a real-time online Gaming-Betting platform, integrating multiple payment methods and optimizing database performance. My experience also includes developing scalable e-commerce platforms and enhancing employee benefits management systems. I thrive in collaborative environments and am committed to delivering user-friendly and accessible applications that drive business success.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Opus Online

Feb 2022 - Present (3 years 6 months)

Architected and led a real-time On/Off ramping payment gateway development using Node.js (NestJS), PostgreSQL, Kafka and other AWS Services achieving reduced average latency and handling over 50,000 transaction per minute. Designed and deployed a high-availability Online banking platform using microservices architecture on AWS ECS Fargate, API Gateway, Lambda, and DynamoDB, ensuring 99.99% uptime

Node NestJS PostgreSQL Kafka AWS Microservices PCI DSS RabbitMQ Redis

Senior Software Engineer

Sporty Group

Aug 2019 - Present (6 years)

Architected a real-time online Gaming-Betting platform using Node.js and Python, integrating Kafka and Redis Pub/Sub for event streaming, supporting 100M+ betting events daily. Developed and maintained a crypto trading module within the platform, enabling users to trade supported tokens in-app, using secure WebSocket streams and real-time order book management via Kafka for event synchronization.

Node Python Kafka Cryptocurrency PostgreSQL Stripe PayPal

Full Stack Engineer

Studio Present

Aug 2017 - Present (8 years)

Developed and maintained a scalable e-commerce platform using Node.js, React, and TypeScript, enabling personalized shopping experiences that increased user engagement by 40%. Designed and implemented RESTful APIs with Express.js and Node.js, facilitating seamless integration with payment gateways, third-party recommendation engines, and inventory management systems.

Node React TypeScript Redux MongoDB PostgreSQL Docker GitHub Actions)OAuth 2.0 JWT

Full Stack Developer

Setelia

Jun 2015 - Present (10 years 2 months)

Developed and maintained scalable web applications using React, TypeScript, Node.js, and Ruby on Rails, enhancing employee benefits management for clients across EU. Designed and implemented RESTful APIs with Node.js and Ruby on Rails, integrating with insurance carriers and payroll systems to automate benefits enrollment and claims processing.

React TypeScript Node Ruby on Rails RESTful APIs PostgreSQL Jest RSpec GitHub Actions)Agile

Education

Degrees, certifications, and relevant coursework

University of Antwerp

Bachelor's Degree, Computer Science

2011 - 2015

Studied Computer Science, gaining foundational knowledge and practical skills in the field. Completed the program in Belgium, focusing on core computer science principles.