Christopher Topinka

As a fully remote contractor with TekSystems. Acting as Lead Engineer for the Mortgage Servicing team backend and services integration. • Documentation, testing and implementing bug fixes for Java Spring and Mule projects involved in upgrade migrations. • Demonstrated how to compose meaningful tests using MUnit for Mule, Postman test suites for REST and SOAP services, and Groovy/Spock for Spring Boot projects. • Organized the team around an AMQ cloud migration, and addressed several defects in Mule that allowed us to test flows using AMQ messaging. • Used VSCode Dataweave extension to implement fully unit tested, reusable shared libraries for Mule Dataweave functions. • Added features to Maven pom files to enable local environment builds on developer machines and improve CI/CD reporting and logging for debugging. • Designed and developed a Mule 4 API for the Call Biometrics project for detecting call fraud within the Salesforce CRM. • Demonstrated how to accomplish SSL encryption without 'pinning' certificates and how to use a shared library to onboard and retrieve secrets and credentials from AWS secrets vault. • Showed the team how to take advantage of Mule mock services to allow client development to proceed in parallel with API development. • Demonstrated to the team how to use MS Teams threaded channels vs. email chains and group chat. • Participated in off-hours production releases and calls to address production and development environment issues. • Development stack included: MuleSoft Anypoint Studio, Mule Cloud Hub, Eclipse, IntelliJ, VSCode, SoapUI, Postman, MS teams, Jabber, Outlook, Sharepoint, Jira, Azure Boards, Bitbucket, Bamboo, Jenkins, Github, Git, Github-Desktop, Git-Bash, Github Actions, Windows OS, Service Now, CyberArk, AWS Secrets, Nexus, Java 6-17, Spring, Spring Boot, Maven, Gradle, DataDog, Splunk, Dynatrace. • Fully remote

As a contractor for Summit Human Capital, for Duke Energy Distributed Intelligence Smart-Grid integration. Take over maintenance and development of an Edge deployed, micro-services framework and front-end UI to allow observability and control of Smart-Grid network devices. Deployment automation, hardening, testing and features added to Actor model micro-services of OpenFMB projects at https://github.com/openenergysolutions written in Rust. Worked with Rust third party public libraries to add features and create release artifacts needed by the community. Switched our development environment tooling to Ubuntu in AWS Workspaces. Collaborated on development and began to write tests with Jest for a typescript NATS message monitoring application derived from an updated version of https://github.com/ulexxander/nats-inspector. CI/CD with Cargo, Docker, AWS codebuild to ECR image repository. Golang application for transferring images to the Edge network Kubernetes Gitops environment with Helm, Fleet, Rancher. Integration testing framework with Golang test-containers. The team operated in MS Teams and Jira kanban. New to Rust and Cargo. Stack: Kubernetes, Docker, Fleet, Helm, Rancher, EC2, Codebuild, ECR, AWS Workspaces, Golang, Rust, Java, Angular, React, Typescript, Protobuf, NATS, MQtt, Postgres TimescaleDb.

Developing cloud REST services against Json document database. The project was to support existing core functionality of on-premise solutions and transition to cloud based services. At the same time we implemented processes and tools to support a fledgling Agile devops team moving toward GitOps release flow. Special focus on refactoring for testability and SOLID design. Fully remote. Stack included Java, Spring Boot, REST services, JSon Jackson, Spring Security, TestNG, Azure Cosmos DB, Azure Key Vault, Postman, Microsoft Teams, Github, Azure Devops, Azure App Service, Terraform, Windows, Scoop, Intellij, Codespace, VSCode