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I am a Senior Backend Engineer & Architect with 18+ years of experience designing and delivering scalable distributed systems, cloud-native microservices, and enterprise API ecosystems, primarily in financial services and high-volume digital platforms. I specialize in Java, Spring, Kafka, Oracle, AWS, Azure, Kubernetes, and CI/CD, delivering secure, resilient, high-performing solutions. I have led architecture and delivery of mission-critical event-driven systems across banking, fintech, retail, and media. I excel at translating business needs into robust technical solutions that improve scalability, reliability, and operational efficiency, and I enjoy collaborating with cross-functional teams to drive results.…I am a Senior Backend Engineer & Architect with 18+ years of experience designing and delivering scalable distributed systems, cloud-native microservices, and enterprise API ecosystems, primarily in financial services and high-volume digital platforms. I specialize in Java, Spring, Kafka, Oracle, AWS, Azure, Kubernetes, and CI/CD, delivering secure, resilient, high-performing solutions. I have led architecture and delivery of mission-critical event-driven systems across banking, fintech, retail, and media. I excel at translating business needs into robust technical solutions that improve scalability, reliability, and operational efficiency, and I enjoy collaborating with cross-functional teams to drive results.

NAGA SIVA

Back-End Developer, Full Stack Developer, Developer, +3

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I am a Senior Backend Engineer & Architect with 18+ years of experience designing and delivering scalable distributed systems, cloud-native microservices, and enterprise API ecosystems, primarily in financial services and high-volume digital platforms. I specialize in Java, Spring, Kafka, Oracle, AWS, Azure, Kubernetes, and CI/CD, delivering secure, resilient, high-performing solutions. I have led architecture and delivery of mission-critical event-driven systems across banking, fintech, retail, and media. I excel at translating business needs into robust technical solutions that improve scalability, reliability, and operational efficiency, and I enjoy collaborating with cross-functional teams to drive results.…I am a Senior Backend Engineer & Architect with 18+ years of experience designing and delivering scalable distributed systems, cloud-native microservices, and enterprise API ecosystems, primarily in financial services and high-volume digital platforms. I specialize in Java, Spring, Kafka, Oracle, AWS, Azure, Kubernetes, and CI/CD, delivering secure, resilient, high-performing solutions. I have led architecture and delivery of mission-critical event-driven systems across banking, fintech, retail, and media. I excel at translating business needs into robust technical solutions that improve scalability, reliability, and operational efficiency, and I enjoy collaborating with cross-functional teams to drive results.

Available to hire

I am a Senior Backend Engineer & Architect with 18+ years of experience designing and delivering scalable distributed systems, cloud-native microservices, and enterprise API ecosystems, primarily in financial services and high-volume digital platforms. I specialize in Java, Spring, Kafka, Oracle, AWS, Azure, Kubernetes, and CI/CD, delivering secure, resilient, high-performing solutions.

I have led architecture and delivery of mission-critical event-driven systems across banking, fintech, retail, and media. I excel at translating business needs into robust technical solutions that improve scalability, reliability, and operational efficiency, and I enjoy collaborating with cross-functional teams to drive results.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Sr. Consultant – Backend Engineer at Citibank

November 1, 2024 - August 31, 2025

Designed and developed high-performance Spring Boot microservices and REST APIs for the ARM platform; optimized Oracle-based persistence, queries, indexes, and materialized views; built batch data processing pipelines with Linux shell scripting, Python, Oracle SQL, and Autosys; implemented caching and API performance optimizations; led Spring Boot, Tomcat, and Apache version upgrades; utilized GitHub Copilot to generate boilerplate code for services, JPA, DTOs, controllers, configurations, and tests; developed transactional JPA persistence layers and managed CI/CD pipelines with Jenkins and RLM; partnered with SRE teams to troubleshoot production incidents.

Principal Engineer / Architect at Mr. Cooper (Nationstar Mortgage)

July 1, 2017 - October 31, 2024

Designed and built Java/Spring Boot microservices to enable claims processing and integration with vendor apps; implemented SOAP services; developed inbound/outbound BPM services; implemented mutual TLS for secure communications; led performance testing with JMeter; built REST and SOAP interfaces, JMS-based asynchronous processing, data validation, and mapping to systems of record; contributed to BPM migration and DevOps pipelines for claims processes.

Sr. Engineer at Cognizant – Walmart

June 1, 2015 - July 31, 2017

Designed and delivered RESTful services for invoice processing and global licensing platforms; built Java microservices and BPM integrations; led cloud platform evaluation and migration strategy to improve scalability and efficiency; provided technical leadership through architecture reviews and design governance.

Sr. Engineer / Technical Lead at Cognizant – Disney ABC

October 1, 2014 - May 31, 2015

Developed media ingestion REST APIs and integration services; designed canonical metadata models to improve data standardization and interoperability; led release planning and cross-functional stakeholder communication to ensure timely delivery and quality.

Sr. Engineer / Technical Lead at Cognizant – Northern Trust

September 1, 2013 - October 31, 2014

Contributed to financial services initiatives; worked on technical leadership, solution architecture, and delivery governance for critical workloads.

Sr. Engineer / Technical Lead at Cognizant – Barclays Bank PLC

August 1, 2012 - August 31, 2013

Worked on development and integration efforts for Barclays; contributed to system designs and hands-on coding in a global banking context.

Sr. Developer / Tech Lead at Cognizant – American Express Acquisition & Affiliate Marketing

August 1, 2004 - July 31, 2012

Designed and delivered capabilities for acquisitions and affiliate marketing; built enterprise-grade Java applications and integration solutions.

Principal Engineer / Architect at Mr. Cooper (formerly Nationstar Mortgage)

July 1, 2017 - October 1, 2024

Designed and developed Java/Spring Boot microservices for claims processing and integration with multiple vendor apps. Built SOAP provider/consumer modules, implemented mutual TLS for secure transport, and delivered BPM-based services for inbound/outbound claims. Led performance testing with JMeter and analyzed metrics. Implemented JMS-based asynchronous processing, WSDL/XSD-based validation, and data migration/archival solutions. Established DevOps pipelines for Claims apps and collaborated with IBM for capacity planning and API performance assessment.