Dennis Adjei-Baah
St. Charles
Summary
Software development professional with comprehensive background in building scalable, high-quality software applications. Known for delivering impactful projects and driving continuous improvement. Team-oriented and results-driven, with strong ability to adapt to changing requirements and priorities. Proficient in programming languages and software development methodologies.
Overview
13
13
years of professional experience
Work History
Senior Software Engineer - (Ethoca)
Mastercard
O'Fallon, MO
09.2022 - Current
- Lead technical design and implementation for high‑priority initiatives, including subscription control, selective identification, and API rescoring efforts.
- Analyze complex system behavior and deliver durable solutions, including supporting performance engineers in debugging Clarity services to resolve latency issues.
- Engage actively in Mastercard’s Launcher Program and Talent Finders initiatives to support early‑career talent and strengthen the engineering pipeline.
- Contribute to enterprise‑wide engineering initiatives such as the React Working Group Open Source SIG, expanding impact beyond immediate team boundaries.
- Upgrade and maintain internal platforms and UI applications, including leading the transition of internal tooling to Angular v18.
Senior Software Engineer - MPGS (Mastercard Payment Gateway Services)
Mastercard
O'Fallon, MO, US
08.2021 - 09.2022
- Researched, designed and implemented feature enhancements for Simplify Commerce's platform
- Improved technical documentation for different parts of the Simplify Commerce platform
- Mentored junior developers around technology and best practices in software development
- Wrote a developer-friendly CLI that reduced technology onboarding time from weeks to a couple of days
Software Engineer
BUOYANT INC
San Francisco, CA, US
05.2017 - 08.2021
- Contributed to the open-source service mesh project Linkerd version 2.x which is used by thousands of enterprises around the world for managing their microservices infrastructure
- Developed part of a Kubernetes SaaS application that helped SREs visualize their microservice infrastructure, configure service level objectives and set up alerts for service level objective violations
- Worked with Kubernetes API to build an app that tracked the rollout state of deployments within a Kubernetes cluster
- Contributed to Linkerd's version 1.x service mesh proxy built in Scala
- Successfully reduced Linkerd's 1.x memory footprint and startup time by changing its JVM to use OpenJ9
- Contributed to Twitter's open-source project Finagle written in Scala
- Provided first-class Linkerd enterprise support from large scale organizations to startups around the world
- Provided open-source support to users on Linkerd's slack channel.
Software Engineer
TICKETFLY
San Francisco, CA, US
05.2017 - 10.2017
- Developed a marketing email campaign app for Ticketfly platform clients to better analyze the effectiveness of email campaigns
- Maintained ticketing platform that served thousands of event venues and promoters
- Developed new play/scala microservices to assist the Ticketfly ticketing platform microservices migration strategy
Teaching Assistant
DEPARTMENT OF COMPUTING
Johnson City, TN, US
08.2016 - 05.2017
- Taught over 50 student lessons on basic computer concepts, web security and how to utilize the Microsoft Office Suite
- Graded student assignments and tests that evaluated their understanding on how to effectively use Microsoft Word, Excel and PowerPoint
- Increased student knowledge retention by modifying the course curriculum
Full-Stack Software Engineer
SERVICE DELIVERY TEAM, WORLD WIDE TECHNOLOGY, INC
St. Louis, MO, US
06.2016 - 08.2016
- Improved project management functionality in the company's time tracking app using AngularJS, Groovy/Grails and Oracle PL/SQL
- Helped outline a migration strategy for a project management web app to be moved from in-house infrastructure to a PaaS platform
- Analyzed business process in the supply chain warehouse in order to deliver accurate requirements in a proposed supply chain app
Front-End Developer
SHERROD LIBRARY TECHNOLOGY AND CONTENT SERVICES
Johnson City, TN, US
08.2015 - 08.2016
- Established part of a web analytics platform for the library using Piwik Analytics, Apache Solr and Apache access log files
- Designed and proposed web page mock ups using Bootstrap CSS and HTML for the new library web site
- Conducted interviews with over 30 librarian staff to evaluate the need for a new in-house library staff portal
- Reduced time consuming workflow of updating Faculty Thesis and Dissertation uploads by developing an XSLT script for the library's XML-metadata store
Full-Stack Software Engineer
SERVICE DELIVERY TEAM, WORLD WIDE TECHNOLOGY, INC
St. Louis, MO, US
05.2013 - 08.2015
- Increased project manager effectiveness by providing greater project health and financial data visibility by developing a web app with AngularJS, Groovy/Grails (A Java MVC Framework) and Oracle PL/SQL
- Strengthened the company's web application security platform by implementing Novell's Identity Management Solution
- Maintained the company's primary internal user account synchronization web app (Spring MVC, Oracle PL/SQL)
- Mentored other developers to effectively use AngularJS
Education
M.S. - Computer and Information Science
EAST TENNESSEE STATE UNIVERSITY
05.2017
B.S. - Computer Science
PRINCIPIA COLLEGE
05.2013
Skills
- React
- Javascript
- Bash
- MySQL
- Java
- NodeJS
- Spring Boot
- Angular
- Git
- IntelliJ IDEA
- Eclipse Memory Analyzer
- Karma
- Jasmine
- Jenkins
- Spock Framework Testing
Languages
English
Personal Information
Title: Senior Software Engineer
Timeline
Senior Software Engineer - (Ethoca)
Mastercard
09.2022 - Current
Senior Software Engineer - MPGS (Mastercard Payment Gateway Services)
Mastercard
08.2021 - 09.2022
Software Engineer
BUOYANT INC
05.2017 - 08.2021
Software Engineer
TICKETFLY
05.2017 - 10.2017
Teaching Assistant
DEPARTMENT OF COMPUTING
08.2016 - 05.2017
Full-Stack Software Engineer
SERVICE DELIVERY TEAM, WORLD WIDE TECHNOLOGY, INC
06.2016 - 08.2016
Front-End Developer
SHERROD LIBRARY TECHNOLOGY AND CONTENT SERVICES
08.2015 - 08.2016
Full-Stack Software Engineer
SERVICE DELIVERY TEAM, WORLD WIDE TECHNOLOGY, INC
05.2013 - 08.2015
B.S. - Computer Science
PRINCIPIA COLLEGE
M.S. - Computer and Information Science
EAST TENNESSEE STATE UNIVERSITY