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Sekhar Sai - Full Stack Java Developer

[email protected]

Location: Irving, Texas, USA

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Sr. Full Stack Java Developer Sekhar Sai 347-791-1454 | [email protected] PROFESSIONAL SUMMARY Sr. Full Stack Java Developer with 7+ years of enterprise experience across payments, healthcare, and supply chain domains. Expert in Java/J2EE, Spring Boot, Spring REST, Spring Batch, and Microservices architecture; Angular, JavaScript, HTML5, and CSS3 front-end development; and Oracle, SQL, and PL/SQL database engineering. Deep AWS expertise spanning ECS, EKS, Lambda, API Gateway, S3, SQS, and SNS deploying cloud-native applications with Docker, Kubernetes, and OpenShift. Proven DevOps practitioner delivering through GitLab CI/CD and Jenkins pipelines. Strong advocate of TDD, BDD (Cucumber), and Test Automation. Consistent Agile/Scrum contributor who delivers measurable business outcomes from day one. TECHNICAL SKILLS Languages Java 17+, J2EE, TypeScript, JavaScript, SQL, PL/SQL, Python Frameworks Spring Boot, Spring REST, Spring Batch, Spring WebFlux, Spring MVC, Spring Data JPA / Hibernate, Angular 14+, React.js, Node.js, AngularJS AWS ECS, EKS, Lambda, API Gateway, S3, SQS, SNS, EC2, CloudWatch, ELB, RDS Microservices Microservices Architecture, REST APIs, Event-Driven Architecture, OAuth2/JWT, Kafka, RabbitMQ, Redis CI/CD & DevOps GitLab CI/CD, Jenkins, GitHub Actions, Bamboo, Maven, Gradle | DevOps, Blue-Green Deployments Containers Docker, Docker Swarm, Kubernetes, OpenShift, Amazon EKS, Pivotal Cloud Foundry (PCF) Testing TDD, BDD (Cucumber), JUnit 5, Mockito, Selenium, Test Automation, Integration Testing, SonarQube Databases Oracle, PostgreSQL, SQL Server, MySQL, MongoDB, DynamoDB | PL/SQL, Stored Procedures, Query Optimization Payments & Security 3-D Secure (EMVCo 3DS), ISO 8583, OAuth2/JWT, PCI-DSS, PSD2, Challenge Flow Orchestration, ACS/DS Integration Version Control Git, GitHub, GitLab, Bitbucket, SVN Monitoring Splunk, CloudWatch, ELK Stack, Grafana, Prometheus, SLF4J/MDC, Log4j, Apigee Methodology Agile, Scrum, Sprint Planning, Backlog Grooming, Jira, Confluence, Code Reviews Web Servers Apache Tomcat, Nginx, Apache HTTP Client: Mastercard, O Fallon, MO November 2024 Present Role: Sr. Java Full Stack Developer Architected production-grade RESTful microservices using Java 17+/J2EE and Spring Boot, powering Mastercard's global payment platform processing millions of daily transactions with 99.99% uptime SLA. Engineered Spring Batch pipelines for end-of-day settlement file generation, reconciliation processing, and bulk transaction reporting eliminating manual overnight jobs and reducing batch cycle time by 40%. Implemented Spring REST APIs secured with OAuth2/JWT, achieving 100% PCI-DSS compliance across all cardholder data flows and passing every quarterly security audit. Built Angular 14+ dashboards (TypeScript, HTML5, CSS3, NgRx) for real-time transaction monitoring and fraud signal visualization, enabling operations teams to respond to anomalies 60% faster. Orchestrated containerized workloads on Amazon EKS and Kubernetes with blue-green deployments and auto-scaling, sustaining sub-100ms P99 authorization latency under peak load. Integrated AWS SQS and SNS to decouple payment event notifications across 12+ distributed microservices, improving resilience and eliminating synchronous coupling bottlenecks. Streamlined CI/CD delivery using GitLab CI/CD and Jenkins DevOps pipelines automated builds, security scans, and multi-environment deployments shortened release cycles from 2 weeks to 2 days. Spearheaded BDD (Cucumber) test automation alongside TDD with JUnit 5 and Mockito, achieving 95%+ coverage on transaction processing, fraud rule engines, and API gateway layers. Implemented secure 3DS challenge flow orchestration, DS callouts, and ACS integrations ensuring full EMVCo 3-D Secure compliance across card-not-present transaction flows. Optimized Oracle SQL queries and PL/SQL stored procedures for high-frequency ledger operations, reducing average database response time by 30%. Deployed and managed microservices on Docker, OpenShift, and Pivotal Cloud Foundry (PCF) with zero-downtime releases; enforced code quality with SonarQube. Drove Agile/Scrum ceremonies sprint planning, backlog grooming, and retrospectives consistently meeting sprint commitments and maintaining team velocity. Environment: Java 17+/J2EE, Spring Boot, Spring REST, Spring Batch, Spring WebFlux, Angular 14+, TypeScript, HTML5, CSS3, OAuth2/JWT, Microservices, Amazon EKS, Kubernetes, Docker, OpenShift, PCF, AWS SQS/SNS/S3, Oracle, PL/SQL, GitLab CI/CD, Jenkins, JUnit 5, Mockito, BDD/Cucumber, Kafka, Redis, PostgreSQL, SonarQube, Agile/Scrum Client: Blue Cross and Blue Shield of Kansas City, Kansas City, MO December 2022 October 2024 Role: Full Stack Java Developer Designed and delivered 15+ RESTful microservices using Java/J2EE and Spring Boot, enabling modular releases that reduced defect leakage by 20% and accelerated time-to-market by 30%. Developed Spring Batch pipelines for healthcare claims processing and eligibility file ingestion, reliably processing 500K+ daily records with full error recovery, audit logging, and zero data loss. Engineered event-driven serverless workflows on AWS Lambda, API Gateway, ECS, SQS, SNS, and S3 cutting server infrastructure costs by 25% and scaling dynamically to healthcare data volumes. Built Angular 12+ applications with NgRx state management and React.js front-end components (TypeScript, JavaScript, HTML5, CSS3), reducing UI development cycle time by 30%. Containerized and deployed microservices using Docker, Kubernetes, and OpenShift; configured GitLab CI/CD and Jenkins pipelines with automated rollback on test failure. Implemented BDD (Cucumber) and Selenium TDD test automation, achieving near-zero post-release defects on claims processing and provider portal workflows. Maintained Oracle database with PL/SQL stored procedures and Hibernate ORM; tuned SQL queries with indexing and execution plan analysis, improving claims query performance by 25%. Engineered RabbitMQ and Kafka async messaging pipelines for real-time event streaming, handling 100K+ daily healthcare transactions reliably. Collaborated in Agile/Scrum teams via Jira delivering 100% of quarterly roadmap commitments on time. Environment: Java/J2EE, Spring Boot, Spring REST, Spring Batch, Angular 12+, React.js, TypeScript, JavaScript, HTML5, CSS3, AWS (Lambda, API Gateway, ECS, SQS, SNS, S3), Docker, Kubernetes, OpenShift, GitLab CI/CD, Jenkins, Oracle, PL/SQL, Hibernate, Kafka, RabbitMQ, JUnit, Selenium, BDD/Cucumber, Jira, Agile/Scrum Client: US Foods, India June 2020 July 2022 Role: Senior Java Developer Engineered Java/J2EE Spring MVC applications with Spring REST/JAX-RS services, increasing system throughput by 25% across supply-chain transaction pipelines. Developed Spring Batch jobs for nightly inventory reconciliation and order fulfillment processing across 50+ distribution centers, replacing error-prone manual overnight data loads. Built full-stack UI features using Angular, AngularJS, HTML5, CSS3, JavaScript, and jQuery, delivering a responsive cross-browser experience for procurement and logistics modules. Architected serverless microservices integrating AWS Lambda, API Gateway, S3, SQS, and CloudWatch, reducing operational overhead by 35% through event-driven design. Established GitLab CI/CD and Jenkins DevOps pipelines with Maven and automated test gates, cutting deployment errors by 40% and enabling on-demand multi-environment releases. Introduced BDD (Cucumber) and Selenium TDD automation, reducing manual regression testing effort by 50% and enabling monthly sprint releases without QA bottlenecks. Optimized Oracle SQL through indexing, partitioning, and execution plan analysis, cutting critical report generation time by 25%. Created Oracle PL/SQL stored procedures and functions for the DAO layer, validating complex business objects against database schemas. Collaborated in Agile/Scrum delivery using Jira for sprint planning, bug triage, and velocity tracking across 3 concurrent development squads. Environment: Java/J2EE, Spring Boot, Spring MVC, Spring REST, Spring Batch, Angular, AngularJS, HTML5, CSS3, JavaScript, AWS (Lambda, S3, SQS, API Gateway, EC2, CloudWatch), GitLab CI/CD, Jenkins, Maven, Docker, Oracle, SQL, PL/SQL, Selenium, BDD/Cucumber, TDD, JUnit, MongoDB, Jira, Agile/Scrum Client: HDFC Bank, India September 2018 April 2020 Role: Java Web Developer Developed J2EE-based loan servicing and payment systems using Java, Spring Boot, Spring REST, and Struts improving transaction accuracy by 20% across core banking workflows. Built reusable Angular and React.js front-end components (HTML5, CSS3, JavaScript) that reduced duplicate UI code by 35% and accelerated feature delivery across 6 banking modules. Implemented TDD and BDD (Cucumber) test strategies with JUnit and Mockito across unit, regression, and integration suites, cutting UAT cycle time by 15%. Designed and maintained Oracle schemas with PL/SQL stored procedures and SQL scripts, ensuring data integrity across loan origination and account servicing pipelines. Monitored AWS resources using CloudWatch, configuring alarms for EC2, RDS, S3, and EBS proactively detecting production incidents before customer impact. Participated in Agile/Scrum sprint ceremonies and contributed to DevOps culture of continuous integration and automated testing. Environment: Java/J2EE, Spring Boot, Spring REST, Struts, JSP, Angular, React.js, HTML5, CSS3, JavaScript, Oracle, SQL, PL/SQL, TDD, BDD/Cucumber, JUnit, Mockito, AWS CloudWatch, Docker, Agile/Scrum, DevOps Keywords: continuous integration continuous deployment quality analyst user interface javascript sthree procedural language Missouri