Lex O'halloran
About Lex O'halloran
Lex O'halloran is a Software Engineer at Fannie Mae in Reston, Virginia, specializing in AWS-hosted microservices for loan pricing software.
Current Company
Lex O'halloran currently works at Fannie Mae as a Software Engineer. He is based in Reston, Virginia, United States. His role involves working on microservices hosted on AWS for loan pricing software. He also utilizes Spring frameworks, including MVC, Data, and Security, in his daily tasks.
Previous Employment
Before joining Fannie Mae, Lex O'halloran worked at Walmart Labs as a Software Engineer in Bentonville, Arkansas, from 2018 to 2020. His earlier roles include a brief stint of three months as a Software Developer at Revature in Tampa, Florida, in 2018. Prior to that, he served as Team Lead for Course Materials at Follett Higher Education for six months in Greater Boston Area. He has also worked at Middlebury College, where he took on various roles, including Advanced Computer Consultant, LIS Student Consultant and Teaching Assistant in the Physics Department.
Education in Computer Science
Lex O'halloran studied at Middlebury College, where he completed his Bachelor's degree in Computer Science. His academic tenure at Middlebury College spanned from 2010 to 2015, covering five years. This foundational education has significantly influenced his expertise and career trajectory in software engineering.
Specialization in AWS and Spring Frameworks
In his current role at Fannie Mae, Lex O'halloran specializes in building AWS-hosted microservices for loan pricing software. He proficiently uses various Spring frameworks like MVC, Data, and Security to enhance the functionality and security of applications. His work involves collaboration with DevOps engineers to create automated pipelines for testing, code analysis, build, and deployment.
Testing and Legacy Architecture Maintenance
Lex O'halloran maintains an efficient test pyramid using technologies such as H2 in-memory database for unit testing and Pact for contract testing. He is responsible for maintaining the legacy architecture for loan pricing software. His tasks also include implementing automated Cucumber testing to ensure the system's reliability and efficiency.