Ahmed Aboualsheikh

Progression: Senior Software Engineer → Solution Engineer (incl. de facto Software Architecture responsibilities)

• ▸Designed the architecture of event-driven retail platforms using Apache Kafka — including greenfield systems (topic design, consumer/producer contracts, partitioning strategy) and evolution of inherited systems; implementation delivered collaboratively with the team.
• ▸Conducted trade-off analyses, authored Architecture Decision Records (ADRs) for the migration of 2–3 legacy systems, and presented findings and recommendations to both engineering teams and business stakeholders; served as Solution Engineer bridging architecture and delivery teams.
• ▸Contributed to containerization and Kubernetes-native deployment of legacy applications on-premises, improving CI/CD pipeline reliability and deployment frequency.
• ▸Led legacy modernization through major refactoring of undocumented systems, test automation and regression testing, and extraction of legacy components into microservices using Spring Boot, Spring Batch, and Kubernetes.

Stack: Java · Kotlin · Spring Boot · Spring Batch · Spring Modulith · Microservices · Apache Kafka · Kubernetes · Docker · Helm · GitLab CI/CD · Grafana · Instana · Loki · Prometheus · SonarQube · PostgreSQL · Maven · Git

• ▸Developed and maintained a bookkeeping application for a major retail client — delivering new features, bug fixes, production support, and legacy Java modernization.
• ▸Contributed to a team effort migrating legacy application components to cloud-native Kubernetes services — Spring 4 to Spring Boot and Spring Batch, IBM DB2 to PostgreSQL HA — laying the groundwork for a modernized platform architecture.
• ▸Built an observability solution for the legacy system using Grafana and MySQL, containerized on Kubernetes, providing the team with first-time structured monitoring of a previously opaque production environment.
• ▸Contributed to a Java 6 to Java 8 upgrade of batch jobs running on IBM Mainframe (z/OS), modernizing a critical processing layer in a high-stakes financial environment.

Stack: Java · Spring Boot · Spring Batch · Docker · Kubernetes · IBM DB2 · PostgreSQL · MySQL · Grafana · SQL

• ▸Technical lab support: environment setup, VM configuration, server migration.

• ▸Sole on-site technical engineer responsible for integrating IVR systems with backend banking platforms over IBM Message Broker — only technical resource at the client side alongside the project manager, in a high-availability banking environment.
• ▸Contributed as junior developer to aerospace and e-government software projects.

Stack: IBM Message Broker · WebSphere Application Server · Java