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I am an experienced Senior Software Engineer with a strong background in designing, developing, and maintaining scalable back-end services. I am proficient in Java and Microservices Architecture and skilled in collaborating with cross-functional teams to implement robust, future-proof solutions. I have proven expertise in customer engagement, mentoring junior team members, and making impactful technical decisions to drive project success. Over the course of my career, I have led key implementations such as OAuth token validation for secure API communication, resolved performance bottlenecks, maintained microservices applications, and migrated critical systems ensuring compliance with industry standards. I thrive in Agile team environments and consistently deliver timely solutions while enhancing team productivity and technical skills.…I am an experienced Senior Software Engineer with a strong background in designing, developing, and maintaining scalable back-end services. I am proficient in Java and Microservices Architecture and skilled in collaborating with cross-functional teams to implement robust, future-proof solutions. I have proven expertise in customer engagement, mentoring junior team members, and making impactful technical decisions to drive project success. Over the course of my career, I have led key implementations such as OAuth token validation for secure API communication, resolved performance bottlenecks, maintained microservices applications, and migrated critical systems ensuring compliance with industry standards. I thrive in Agile team environments and consistently deliver timely solutions while enhancing team productivity and technical skills.

Shyam Sundar

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I am an experienced Senior Software Engineer with a strong background in designing, developing, and maintaining scalable back-end services. I am proficient in Java and Microservices Architecture and skilled in collaborating with cross-functional teams to implement robust, future-proof solutions. I have proven expertise in customer engagement, mentoring junior team members, and making impactful technical decisions to drive project success. Over the course of my career, I have led key implementations such as OAuth token validation for secure API communication, resolved performance bottlenecks, maintained microservices applications, and migrated critical systems ensuring compliance with industry standards. I thrive in Agile team environments and consistently deliver timely solutions while enhancing team productivity and technical skills.…I am an experienced Senior Software Engineer with a strong background in designing, developing, and maintaining scalable back-end services. I am proficient in Java and Microservices Architecture and skilled in collaborating with cross-functional teams to implement robust, future-proof solutions. I have proven expertise in customer engagement, mentoring junior team members, and making impactful technical decisions to drive project success. Over the course of my career, I have led key implementations such as OAuth token validation for secure API communication, resolved performance bottlenecks, maintained microservices applications, and migrated critical systems ensuring compliance with industry standards. I thrive in Agile team environments and consistently deliver timely solutions while enhancing team productivity and technical skills.

Available to hire

I am an experienced Senior Software Engineer with a strong background in designing, developing, and maintaining scalable back-end services. I am proficient in Java and Microservices Architecture and skilled in collaborating with cross-functional teams to implement robust, future-proof solutions. I have proven expertise in customer engagement, mentoring junior team members, and making impactful technical decisions to drive project success.

Over the course of my career, I have led key implementations such as OAuth token validation for secure API communication, resolved performance bottlenecks, maintained microservices applications, and migrated critical systems ensuring compliance with industry standards. I thrive in Agile team environments and consistently deliver timely solutions while enhancing team productivity and technical skills.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Tamil

Advanced

Work Experience

Software Engineer at Verizon (Newt Global)

January 1, 2018 - August 21, 2025

Gained experience in Spring, Hibernate, and Vaadin framework. Involved in design and business logic implementation of forecasting modules. Worked on resolving complex design, application development, and bug fixes. Developed applications and software to increase department efficiency. Diagnosed and corrected errors within code to allow integration of proprietary applications. Tuned systems to improve performance. Participated in requirements gathering and design development meetings.

Senior Software Engineer at Mastercard (L&T Infotech)

January 1, 2018 - Present

Designed and implemented robust back-end systems for high-volume payment processing platforms with strong architectural understanding of payment applications. Led the implementation of OAuth token validation using interceptors to ensure secure API communication and resolved performance bottlenecks caused by inefficient caching mechanisms. Maintained applications developed using Microservices Architecture and migrated applications from Nets infrastructure to Mastercard infrastructure ensuring compliance with Mastercard's standards, tools, and security protocols. Experienced in handling deployments, production bug fixes, and delivering timely hotfixes to ensure system stability and business continuity. Mentored junior developers through one-on-one sessions, code reviews, and technical knowledge transfer sessions to enhance skills and productivity. Diagnosed and corrected errors in React.js codebases to ensure seamless functionality and integration with proprietary applications. Collabora

Software Engineer at Sysbiz Technologies

January 1, 2017 - August 21, 2025

Developed and maintained an application named Trademore built using Spring Boot, Spring, and Hibernate. Provided technical expertise to influence decisions on application design and system architecture. Gained experience working in Microservices architecture application. Delivered customized solutions for Trademore applications, enhancing client satisfaction through tailored features and robust performance. Managed complete SDLC responsibilities—from grooming, estimation, development, UAT, to production deployment, showcasing strong ownership and delivery capabilities. Investigated issues and defects to determine problem root cause and formulate corrective action recommendations.