Eric is an expert Java software engineer specializing in back-end and microservice development as well as workflow/release engineering. Comfortable with a broad set of libraries and environments, he is also skilled in CI/CD and cloud deployment. Additionally, Eric focuses on test-driven, domain-driven, and object-oriented design.
Worked in a team, building new features into the company's flagship Identity access management product. Added new features, including automating a large part of the users' workload. Worked at every level of the stack, but mostly Java and SpringBoot.
Stabilized codebase by introducing Spring best practices, Lombok annotations, and Java Stream notation. Simplified and sped up unit tests by introducing better mocking strategies and test data management.
Identified and corrected a major security vulnerability that affected every REST endpoint, including creating robust integration tests to be certain of the fix.
Mentored several new-to-Java programmers who had come from a Node.js background and showed them how to avoid basic mistakes.
Developed an application to allow DoD Intelligence officers to track international financial transactions to determine national security risks from foreign investments. Utilized Spring REST microservices, Postgres, Elasticsearch, GraphQL, and React.
Developed an application to help experienced government contractors mentor small companies who aspire to be government contractors. Used Spring REST microservices, Postgres, and React/TypeScript.
Developed a large data aggregation service that pulled data from government databases such as FPDS and SAM and correlated it with public financial data sources such as Factset. Utilized NiFi, Postgres, and AWS API Gateway.
Built and managed CI/CD pipelines using Concourse for several projects triggered by private GitHub repositories and sent notifications to Slack. Used Bash scripting as well as customized Docker images delivered with AWS ECR.
Redesigned a large, monolithic Terraform deployment script to be more modular with less repetition and faster deployments to AWS (S3, ECS, ECR, RDS, Secrets Manager). Integrated this with a newly rebuilt Concourse pipeline.
Built a large enterprise application using Java, Postgres, and GWT from prototyping through maintenance. Made design and architectural decisions and provided guidance and code reviews for several offshore teams.
Facilitated a migration into a cloud architecture by building REST-based microservices with Java8, Spring Boot, Redis, and RabbitMQ. Created templates and scripts for building and deploying services into an OpenShift/Kubernetes cluster.
Implemented single sign-on with Keycloak and LDAP to function across multiple applications using Spring Security and OpenID. Authentication of REST endpoints utilized the same mechanism but created JWT bearer tokens.
Performed performance analysis and optimization of Java and SQL code to improve the application's overall responsiveness for an event-sourced data structure. Created documentation and guidelines for the team to use for performance tuning.
Created an Android application for receiving payments and streaming advertisements on a tablet deployed into taxi cabs. The application interfaced with both REST-based data service and the taxi meter.
Built testing and installation scripts for various collections of different open source projects. The scripts would configure different applications to work together so users could install a whole technology stack.
Updated the Swing-based Java user interface for displaying and manipulating currently installed software stacks.
Tested submissions for bug bounties the company awarded for solutions to interoperability problems with open source software.
Designed, implemented, and deployed a Java/JSP-based web application for conducting online purchases of municipal bonds. Interfaced with legacy COBOL code and DB2 databases. The application handled multi-million-dollar transactions securely.
Designed and implemented a system for handling orders and order allocation requests from FIX data sources to legacy COBOL applications. The application used Java and Python, raw socket programming, and Sparc/Solaris and Linux deployments.
Collaborated with developers on a project for handling high volumes of financial purchase orders via SOAP web services. Utilized Java, customized ant tasks, XML, XML-Schema, FIXML, Axis 1.1, JBoss, Apache, and Linux.
Acted as the primary system admin for five production Linux systems and one Sparc/Solaris. Set up and served as the administrator for our internal CVS repository. Designed and documented source repository branching and merging strategies.
Mentored junior developers and led them on a project using screen-scraping technology to interface modern web applications with legacy COBOL applications.
Worked closely with the QA department to develop, document, and implement release management for projects which required multiple components in different languages (e.g. Cobol, Java, and Jython).
Developed client/server applications and 3-tiered applications for Windows with Delphi, MS SQL Server, and Paradox databases.
Contributed to a large, multi-threaded C++ application for handling huge collections of scanned images.
Performed network and email server maintenance for the company.
Built audio capture application for recording voice content in high-fidelity, then encoding and sending the audio files via email.
Created reusable authentication and authorization framework for Delphi applications allowing for enabling, disabling, or hiding screen components dynamically.
I created a builder image and associated OpenShift templates for deploying Dropwizard REST services into an OpenShift cluster.
This allows for the creation of CI/CD pipelines for this type of application in a Kubernetes context.
As part of my work building an enterprise application for a healthcare software company, I set up the security for the app to utilize the existing LDAP server for authentication.
I designed the LDAP schema to meet the needs of the new project, and also be compatible with the structure of the existing LDAP server, which was relied upon by other legacy apps. I configured Spring Security in the new app (which was EJB-based) to use LDAP.
Once the code was complete, I created scripts and LDIF files to bootstrap new installations as well as automate Dev and QA deployment with a standard set of test and demo user credentials.
I designed and built an Android application that accepted card-swipe payments for taxis on a tablet mounted in the backseat. The application integrated with the taxi meter using raw serial communications to capture trip duration information.
During the trip, the tablet would play video advertisements. It would receive push updates of both the application as well as the advertising content.
We had several web applications, some running Spring Boot and one using EJBs and Spring Security. In order to make these applications function seamlessly together without users having to log into each, I implemented a single sign-on solution to consolidate the authentication.
I configured Keycloak as my identity provider, using an existing LDAP server for its data store. Since all of the applications used Spring Security, I was able to configure that using the appropriate OpenID adapter.
One of the challenges with this migration was that the EJB application needed to maintain the ability to authenticate directly against LDAP. This was to allow for a smooth migration in case the new authentication scheme did not work.
I worked for a startup that had to process a huge number of incoming emails. The emails would be sorted by one script, pushed to various servers where a cron job would pick them up and create database records for some of them. Then a similar cycle would send the data along further.
With all of the cron jobs polling and checking, it took over 30 minutes to process something that took only a few seconds of computer time.
I saw there was a better way, so I built an event management system with Java that could trigger a task remotely when it was needed, eliminating all of the wasteful polling and waiting. The product used Java-RMI to communicate between servers and XML to define the jobs (both new technologies at the time).
I eventually licensed the product to a company who made software to synchronize data between disparate relational databases. We enhanced the product to allow for embedded Jython scripts and wrote connectors for the transaction logs of major database systems.
