Billy Haile-Mariam

Professional Experience

Acted as the primary/lead developer on my team. Driving impactful and positive change throughout my organization. Responsible for code quality, futureproofing, and innovation

Delivered a redesigned bank statement experience for all USAA member savings and checking accounts. Rearchitected major components of the original design to increase overall statement generation time and exceed performance requirements. Major technologies used include Java JBoss, Apache Kafka, Docker, Redhat OpenShift, IBM DB2, Linux, Splunk, Kibana, and Prometheus
Worked with business partners to define, scope, and prioritize functional and non-functional feature requirements
Performed code reviews, design sessions, and providing technical mentorship to team members

Worked in a development team to redesign bank statements to a modern design, and to present all account information in a single consolidated view across web, mobile, and physical channels

Worked in a development team that was responsible for the creation and deployment of an internal tool that tracks the migration status of service accounts as they move from a legacy system to Cyber Ark. Major technologies used include: Angular 6, Java, Spring Boot, Gradle, Resilience4J, Docker, Kubernetes, Relational Databases (MSSQL, DB2)

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Worked on the back end of a distributed system that utilized technologies such as Java, Spring Boot, Axon/CQRS, Docker, Kafka, Hystrix, and AWS to build micro-services and RESTful APIs
Worked closely with business partners to groom our project backlog, create stories, define acceptance criteria, demonstrate completed stories, and ensure that all stories meet our definition of done before being worked on
Used Hystrix to add retry logic to parts of our system that interact with external services
Integrated our system with DynamoDB global tables to ensure no duplication of processed events, and also to ensure a seamless system transition from one region to another in a disaster/failover scenario
Built custom swagger meta-annotations to increase code-reuse and standardize API documentation
On-boarded teams of developers to the back end of the project by creating technical documentation and leading a workshop where we discussed all relevant information required to start contributing to the project

Designed and implemented a testing solution that involved wrapping a Spring Boot application around existing Selenium/Cucumber test automation and exposing it as a set of RESTful web services and a custom SwaggerUI interface. The application was then Dockerized, and deployed to AWS for start of day production validations, infrastructure rehydrations, and L3 production support application monitoring
Refactored and added new features to an internal application that tracks the progress of home loans as they move from the originations to servicing department. Angular Front end with a Java/Spring Back end
Automated a manual internal audit process using Java, Splunk, and SQL. Splunk logs from our online portal were cross-referenced with loan boarding data to validate that only customers who clicked an "I accept" button on our terms and conditions page were enrolled in recurring payments. A PDF report was then generated outlining every loan that either passed or failed the audit
Resolved 234 production support tickets, including 212 customer digital escalations
Built a Jira Dashboard using Jira queries and filters that tracked my team's progress on resolving customer digital escalations. This was extremely effective in helping us stay on top of incoming issues, and helped us reduce our ticket backlog in a timely and efficient manner
Migrated Jenkins build jobs from an on-prem Jenkins 1.x instance to a Jenkins 2.x instance running on AWS

Reverse engineered a Java web application from a WAR file (created through an Ant build) into a multi-module Maven project, while simultaneously migrating the application from Subversion to Git. This shrunk the size of the code base down from over 4 GB to approximately 45 MB, and improved the speed and consistency of each build
Wrote scripts to automatically download, install, and configure software on Windows machines

Developed a migration strategy to move development teams and their code repositories from Subversion to Git
Facilitated training sessions to teach source control concepts using Git, Stash, SourceTree, and different development workflows (Central Repository, Feature Branches, Gitflow)
Onboarded new and existing applications to CI/CD Jenkins pipelines, and modified existing pipelines as needed

Completed training modules on Object-Oriented Analysis & Design, UNIX Essentials, Oracle 11g & Data Modeling, Big Data, Java/XML, The Spring Framework, Service Oriented Architecture, Dynamic Web Applications, and C#
Developed a system for Fidelity's Asset Management division to import, normalize, and store data from credit rating agencies into Hadoop. This allowed the firm to find credit rating mismatches between that information and data imported from credit rating aggregation services, saving the company millions of dollars in liabilities

Constructed a web dashboard to showcase project overviews and associated metrics
Managed and updated an online catalog of the services created

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