Oliver J Email & Phone Number

United States

• Developed ASP.NET Core Microservices with Angular 13 for Medical diagnosis software, ensuring compliance with HL7, FHIR, and HIPAA for secure data exchange.• Established Azure infrastructure setup with App Services, Active Directory, Logic Apps, Service Bus and Kubernetes Services for the Hybrid architecture.• Engineered a serverless architecture using Azure Functions on Azure cloud service, achieving a significant 10% decrease in infrastructure costs while concurrently enhancing flexibility and scalability.• Implemented OAuth, SSO, and SAML solutions, enhancing user authentication efficiency by 15%.• Introduced KQL to analyze over 1TB of healthcare data logs, optimizing system performance and troubleshooting.• Optimized stored procedures in SQL Server and T-SQL queries, improving database performance by 20%.• Introduced Datadog for resource usage and log monitoring, reducing system downtime by 10% and saving $520,000 annually.• Managed unit and functional testing using NUnit and Cypress, leading to a 40% reduction in critical bugs through regular code reviews.• Conducted performance testing and optimization using Apache JMeter, improving application response times by 20% and supporting 10,000 concurrent users.• Constructed the MVVM architecture of Angular 13 to develop robust apps, ensuring precise application requirements through tailored controllers and directives.• Migrated CI/CD pipelines from TeamCity to Azure DevOps, upgrading with Terraform to automate Azure API Management deployment.• Led an Agile team of 8 developers, providing technical guidance and mentoring to ensure high-quality software delivery using Scrum practices.

United States

• Converted a legacy monolithic platform into microservices, using C#/ASP.NET Core and Java/Spring.• Applied AWS services including API Gateway and Application Load Balancer to manage and secure APIs, ensuring compliance with industry standards and regulations, leading to a 35% increase in API reliability and security.• Enhanced AWS ETL pipeline using Lambda triggers and Kinesis Firehose to sync data from DynamoDB to MySQL.• Implemented Amazon EKS to orchestrate containerized applications, enhancing deployment scalability and reliability across multiple environments.• Operated AWS CloudFront, CloudFormation, CloudWatch, and DynamoDB to decrease latency by 30% and enhance monitoring. • Executed data migration using MS SQL Server Integration Services(SSIS), achieving 99% accuracy and saving 10+ hours per week for transferring data between databases.• Applied SOLID principles with MVC design pattern and built RESTful APIs using Java/Spring, improving code maintainability by 40%.• Updated a SaaS platform using Angular 6, SCSS, Material UI, and Tailwind, improving user engagement by 25%.• Conducted unit tests and functional testing using MSTest and Cypress, conducted weekly reviews with a professional QA engineering team.• Demonstrated expertise in SDLC processes and development methodologies like Agile SCRUM and TDD.

United States

• Built several medical test web applications from the scratch for ordering tests, checking statuses, and reporting data using ASP.NET Web API, Java/Spring, Jenkins, Angular 2 and React.• Implemented a microservices architecture using ASP.NET Web API and Spring, resulting in a significant reduction in loading times and 15% boost in revenue.• Designed software solutions using Java, Spring and NHibernate, contributing to 10% application performance improvement.• Debugged and resolved complex software issues, reducing critical bugs by 35% through expertise in NUnit and Moq.• Optimized CI/CD pipelines, automating the software delivery process, leveraging expertise in Jenkins, GitHub and Terraform, reducing deployment time by 30%.• Collaborated with cross-functional teams to design UI/UX with Angular 2 and React, boosting customer satisfaction by 45%.