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Michael Doan

@michaeldoan1

Message

Senior Java developer with 15+ years modernizing legacy systems to cloud.

United States

Message

What I'm looking for

I'm seeking senior engineering roles where I can modernize legacy systems to cloud-native architectures, lead technical design, mentor teams, and apply Java, cloud services, and generative AI to deliver scalable, high-performance solutions.

I am a results-driven Senior Java Developer with over 15 years' experience modernizing legacy systems and building cloud-native applications. I specialize in migrating HLASM-based systems to scalable AWS, Azure, and Google Cloud platforms while applying enterprise application architecture principles.

At Syberry Corporation and InventRust Properties I led microservices and Spring-based projects and implemented CI/CD with Jenkins to streamline deployments. I containerized services using Docker and Kubernetes and used profiling tools like JProfiler to significantly improve performance. I also maintained Generative AI components that supported migration processes and coached junior developers on best practices.

I thrive in collaborative Agile teams where I can design robust backend architectures, mentor engineers, and deliver secure, high-performance solutions that align with client goals.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Syberry Corporation

Aug 2020 - Present (5 years 1 month)

Led development and migration of a legacy HLASM system to a cloud-based architecture, implementing microservices with Spring to improve scalability and integrating RESTful APIs for frontend compatibility. Utilized AWS and Jenkins to enable CI/CD, optimized Java performance, and mentored junior developers while supporting a generative AI component.

Java Spring Framework Microservices AWS Jenkins RESTful APIs Hibernate Docker Generative AI

Senior Java Developer

InvenTrust Properties Corp

Jul 2015 - Jul 2020 (5 years)

Redesigned and developed cloud-compatible Java applications, migrating monolithic systems to microservices using Docker and Spring Boot to improve scalability and deployment. Leveraged AWS Lambda for serverless components to minimize costs, performed performance tuning with JProfiler, and introduced Agile practices across teams.

Java Spring Boot Hibernate Docker AWS Lambda Microservices Git Performance Tuning JProfiler

Java Developer

CoffeeCup Software

Jun 2009 - Jun 2015 (6 years)

Developed and maintained Java applications, implemented SQL-backed solutions and RESTful APIs, and contributed to transitioning legacy systems toward cloud services. Used Maven and Agile practices to streamline builds and deliveries while performing debugging and performance optimizations.