Manish Kumar

Principal Software Engineer - Ultimate Kronos Group - Noida, India

(2025-09)

Optimized API performance - achieving a 50% reduction in response time and CPU usage through targeted refactoring and efficient resource management.
Spearheaded performance tuning for critical APIs, resulting in 50% improvement in execution speed and system resource utilization.
Implemented architectural enhancements and caching strategies that halved API latency and CPU consumption.
Developed React.js dashboards for real-time API monitoring, integrating Chart.js and backend metrics to visualize latency, throughput, and error rates.
Implemented role-based UI components in React.js with JWT authentication, ensuring secure access to sensitive API data.

Project Leader - R System International - Noida, India

(2024-06 - 2025-08)

Designed and implemented RESTful APIs for the 'Organization' module ensuring robust functionality and flexibility.
Implemented migration of SOAP to REST API with improved performance, resulting in a rapid increase in the client's buyer base by over 25–30%.
Developed REST APIs for user registration, login, and user profile management, incorporating various CRUD operations for enhanced user experience.
Provided prompt and sustainable solutions for bugs and issues encountered in the production environment, ensuring smooth operation of the system.
Built React.js forms for user registration and profile management, integrated with .NET Core APIs using Axios, and implemented Redux for consistent state management across modules.
Enhanced UI responsiveness with React hooks and lazy loading, reducing initial page load time by 30%.

Senior Engineer 2 - IOMEDIA India Private Limited - Gurgaon, India

(2024-01 - 2024-05)

Designed and implemented RESTful APIs for the 'Organization' module ensuring robust functionality and flexibility.
Provided prompt and sustainable solutions for bugs and issues encountered in the production environment, ensuring smooth operation of the system.
Developed React.js UI for organization data visualization, consuming microservice APIs and rendering dashboards with dynamic filters and pagination.
Implemented error boundaries and logging in React.js to capture frontend exceptions and forward them to backend monitoring services.

Senior Software Engineer - Pitney Bowes India Pvt Ltd - Noida, India

(2016-03 - 2024-01)

Reviewed project specifications and designed technology solutions that met performance expectations.
Wrote highly maintainable, solid code for a software system, forming code framework and earning consistent praise from subsequent developers.
Upgraded legacy code with latest framework versions and analyzed various performance bottlenecks in the project, implementing solutions.
Collaborated with software development and testing teams to design and develop robust solutions to meet client requirements for functionality, scalability, and performance.
Implemented security measures to protect APIs from common threats and optimized performance to ensure fast response times and scalability.
Built React.js dashboards for Fulfillment workflows (inbound/outbound shipping, inventory tracking), integrating WebSockets for real-time order status updates.
Developed responsive React.js UI for Instant Online Postage, enabling PayPal/eBay clients to generate shipping labels with live validation and error handling.

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