David Leonhardt Email & Phone Number

Cincinnati, OH, US

Atlanta, Georgia, US

• Led backend development of the Customer Data Platform Web API, ensuring seamless data transmission and optimal performance.
• Collaborated with cross-functional teams to implement system enhancements, resolve technical issues, and optimise performance.
• Automated data synchronization jobs across multiple systems, increasing system reliability and reducing manual tasks.
• Developed and deployed new API endpoints to improve customer data accessibility and streamline backend architecture.
• Documented API functionalities and backend processes for clear internal team reference and enhanced usability.

• Managed vendor system integrations to ensure seamless and reliable data transfer.
• Designed and delivered reports to meet regulatory requirements in collaboration with business stakeholders.
• Developed and maintained data feeds aligned with regulatory standards, ensuring compliance.
• Created SQL scripts for data validation and transformation, enabling reliable and accurate data movement.
• Documented ETL processes to support knowledge sharing and future system improvements.

Cincinnati, Ohio, US

• Designed and managed EDI and ETL applications for eligibility inquiries and claims processing, ensuring seamless data handling.
• Built SOAP-based and MVC APIs in C# to enable integration with third-party vendors and internal systems.
• Facilitated Agile ceremonies, such as sprint planning and daily standups, to promote effective team collaboration.
• Enhanced ETL workflow monitoring systems to identify and resolve errors proactively.
• Supported legacy system migrations to modern platforms, ensuring data consistency and minimal disruptions.

Prague 2, Prague, CZ

• Investigated, documented root causes, and assisted in prioritizing system error corrections to ensure minimal downtime.
• Delivered after-hours support for code deployments, infrastructure updates, and urgent system issues, maintaining operational continuity.
• Implemented monitoring systems to detect performance issues, escalating them to internal teams for timely resolution.

Cincinnati, OH, US

• Modernized data transfer workflows using SSIS to automate synchronization between legacy systems and third-party tools.
• Developed and optimized stored procedures and complex queries to enhance performance and reduce execution time.
• Designed custom data validation tools to ensure data accuracy and consistency across integrated systems.
• Collaborated with IT teams to implement secure and efficient data exchange processes, improving system integration.
• Conducted regular system performance reviews and optimized queries for improved efficiency.

US

• Developed and maintained web applications using C#, ASP.NET, and MVC to support business operations.
• Improved PCI compliance by refactoring legacy code and enhancing system security measures.
• Supported EDI and ETL processes, ensuring data integrity across payment systems and compliance standards.
• Delivered technical training to team members on processes and tools, boosting productivity and knowledge sharing.

US

• Designed, maintained, and developed web applications and customer-facing websites using C#, ASP, and MVC frameworks.
• Supported website functionality and features by leveraging SQL Server for efficient data management.
• Contributed to projects aimed at developing and enhancing business products to align with organizational goals.
• Refactored legacy code to improve performance, functionality, and compliance with PCI standards.
• Handled daily maintenance tasks and continuity requests to ensure seamless website operations.

Douglasville, GA, US

• Developed database-driven web applications from concept to production, adhering to Agile development practices.
• Collaborated with clients to align application development with requirements and project timelines.
• Designed and implemented stored procedures to enhance backend data management and retrieval efficiency.
• Delivered post-deployment support and updates, ensuring applications adapted to evolving business needs.
• Documented code and technical specifications to support maintenance and knowledge sharing across teams.

Mism, Information Systems

Bachelor Of Science, Computer Information Systems