Vijayasree S

• Designed and implemented a microservices-based architecture with RESTful APIs, improving scalability and reducing system response times
• Developed and maintained ASP.NET Web APIs and AWS Lambda services, achieving ~15% reduction in operational costs through serverless adoption.
• Established strong code quality practices including GitHub Copilot–assisted reviews, unit testing, and mandatory quality walkthroughs, resulting in a ~30% reduction in defects.
• Led and mentored a team of 4 developers, accelerating onboarding through hands-on architecture guidance and reducing ramp-up time by ~50%.
• Collaborated closely with cross-functional teams in Agile sprints to gather requirements and deliver features on schedule.

• Led development of frontend modules using Vue.js and Ember.js, delivering scalable and user-centric solutions.
• Optimized and maintained Java-based microservices, improving performance, stability, and backend efficiency.
• Owned AWS infrastructure (EC2, RDS) and integrated secure third-party APIs with proper authentication and authorization.

• Spearheaded the development of core ASP.NET MVC modules, increasing user engagement by approximately 30%.
• Built dynamic and responsive UI components using jQuery and AJAX, improving page load times and usability.
• Automated data exports and recurring operational tasks using C#, saving approximately 10 hours per week of manual effort.
• Optimized SQL Server queries significantly improve data retrieval and overall application performance.
• Collaborated closely with QA, reviewed test cases, and supported unit/integration testing, contributing to a 40% reduction in defects.

Developed CMS-driven Investigator and Patient Portals for global clinical studies, supporting multilingual content, patient recruitment, screening, training, scheduling, automated communications (Email/SMS), and comprehensive reporting for investigators, sites, and administrators.

Key Contributions:

• Designed and developed end-to-end web portals supporting 100+ investigators and managing 100,000+ patients across clinical studies.
• Implemented Entity Framework Code First migrations and optimized database interactions using C# and LINQ, improving data consistency and reducing errors.
• Built master pages, reusable UI components, and AJAX-based interactions, enhancing performance and user experience.
• Automated daily data exports and notification workflows using C# background jobs, improving communication accuracy and operational efficiency.
• Led requirements gathering, design documentation, and module-level unit testing, ensuring timely and high-quality feature delivery.