Senior Java Full-Stack Developer with 11+ Years Experience

SAI TEJA K

Java Full Stack Developer

Email: **************@*****.***

Phone : +1-512-***-****

●Senior Java Developer with 11+ years of experience building, testing, and supporting enterprise Java applications using Core Java, Spring Boot, RESTful web services, and business rules engines such as Drools / Red Hat BRMS.

●Strong expertise in web applications, API development, JBoss application server, Maven, Git, and Agile methodologies, delivering secure and scalable enterprise solutions.

●Hands-on experience applying BDD/TDD practices using JUnit, preparing software for production deployments, and supporting live systems in Linux environments.

●Proven ability to independently manage small initiatives, contribute to large team efforts, resolve production issues, and mentor junior developers while aligning with organizational culture and values.

●Highly experienced in cloud migrations, database optimization, CI/CD automation, and Agile delivery.

●Adept at collaborating with business stakeholders, QA, construction/operations SMEs, and infrastructure teams to deliver scalable, secure, and maintainable solutions.

●Proficient in technical documentation, SDLC processes, Agile/Scrum delivery, and cross-functional collaboration.

●Proven expertise with Kafka (producers, consumers, schema registry, Kafka Streams) supporting real-time, event-driven financial workflows.

●Experienced deploying applications on JBoss, WebLogic, WebSphere, and Tomcat, and implementing secure, high-availability solutions.

●Strong hands-on expertise in reactive, event-driven architectures using Vert.x and Spring Boot Reactive (WebFlux / Project Reactor), with deep understanding of non-blocking I/O, asynchronous APIs, and reactive design patterns.

●Proven ability to deliver high-performance backend services supporting financial, telecom, and media workloads in fast-paced Agile environments.

●Experienced in CI/CD automation with Jenkins, Maven, and Gradle, including automated rule deployment, automated test suites, and environment validation.

●Proven ability to build event-driven, fault-tolerant microservices using Kafka, Redis caching, MySQL/PostgreSQL replication/partitioning, and distributed data processing.

●Hands-on DevOps experience with Docker, Kubernetes, Terraform, GitHub Actions, Jenkins, and enterprise CI/CD pipelines.

●Skilled in debugging and observability using Splunk, Datadog, Grafana, Wavefront, with experience designing dashboards, alerts, and log aggregation strategies.

●Exposure to Ruby on Rails and Heroku, with the ability to support and debug Rails-based SaaS components when required.

●Applied Test Driven Development (TDD) using JUnit, Mockito, and TestNG to ensure high code quality and maintainability.

●Solid understanding of secure coding practices, PCI-DSS, OAuth2.0/JWT, encryption, tokenization, and API-level security.

●Experienced designing AI-first and generative-AI–assisted product capabilities, integrating LLM-based automation, AI-driven recommendations, and intelligent workflow optimization.

●Strong expertise conducting design reviews, code reviews, architectural documentation, dependency mapping, and collaborative engineering with architects and platform teams.

●Designed and deployed real-time transaction filtering pipelines, integrating APIs with enterprise Java microservices to reduce false positives and ensure regulatory alignment with OFAC, UN, and EU watchlists.

●Expert in deploying and configuring applications on servers like WebLogic, Tomcat, GlassFish, WebSphere, and JBoss.

EDUCATION :

Masters in Concordia University Wisconsin

Bachelors for Information System

TECHNICAL SKILLS

Category

Skills

Languages

Java 8–21, J2EE, EJB 3+, Servlets, JSP, JDBC, XML, JSON, Perl

Frameworks

Spring Framework (Spring MVC, Spring Boot, Spring Security), Hibernate 3+, JPA, JSF, Struts, Vert.x (Core, Web, Event Bus), Vue.js, Drools / Red Hat BRMS

AI Tools

IBM WatsonX Orchestrate, Watson Assistant, Dialogflow CX, Amazon Lex, Kore.ai

Databases

Oracle 10g+, PostgreSQL, SQL Server, MySQL, PL/SQL, MongoDB, MariaDB

Web Services

RESTful APIs, SOAP, JAX-RS, JAX-WS

NLP & Training

Intent classification, entity extraction, utterance curation, intent disambiguation, confidence tuning

Testing

Unit Testing, Regression Testing, Validation Testing, JUnit, Mockito, TestNG, Postman, JMeter

Build Tools

Maven, Gradle, Ant, Eclipse IDE, VS Code

Voice & Search

Watson Speech-to-Text, Text-to-Speech (SSML), Watson Discovery, semantic search

Other

OA, API gateway integration, release management, HA architecture, scripting (Shell/PL-SQL), TDD, BDD

Cloud & DevOps

Docker, Kubernetes, Terraform, Jenkins, Splunk, Wavefront, Datadog, Grafana, App Services, Azure Functions, Azure SQL, Azure DevOps, Azure Key Vault, Azure Monitor, OpenSearch, Elasticsearch, ELK Stack, Azure (VMs, VMSS, AKS, Azure SQL, Service Bus, Azure Monitor), Bicep, SALT, GitHub Actions

SDLC

Agile (Scrum), Waterfall, Technical Documentation, Coordination across teams (business, COBOL developers, architects, BWC SMEs)

Client: Capital One

Role :Sr Java Full Stack Developer, July 2023 – Till Date

Responsibilities :

●Designed and implemented fraud prevention solutions leveraging Direct Data Share (DDS) flows with merchants third party risk service providers to validate pre-authorization data for both 3DS and non-3DS transactions.

●Designed and implemented RESTful and SOAP APIs using Java Spring Boot, enabling seamless integration between frontend applications and backend services.

●Built high-performance RESTful APIs leveraging Spring MVC, Spring and Java Streams API, ensuring reactive, non-blocking communication for large-scale financial applications.

●Migrated core backend services from Java 11 to Java 17, adopting modern language features such as records, sealed classes, enhanced switch expressions, and improved Stream APIs to simplify code and reduce boilerplate across fraud and transaction services.

●Refactored legacy service layers to align with Java 17 LTS, improving JVM performance, memory management, and startup time for high-volume financial APIs handling real-time authorization and fraud validation flows.

●Leveraged Java 17 compatibility with Spring Boot 3.x to modernize microservices, improve dependency security posture, and ensure long-term support for critical payment and risk-evaluation platforms.

●Implemented Hibernate ORM framework for trade persistence, configuring object-relational mappings and optimized HQL queries for Oracle, MySQL, and PostgreSQL trading databases and market data storage.

●Implemented data access layers using Spring Data JPA and Hibernate ORM, ensuring secure, optimized interaction with backend databases.

●Implemented asynchronous market data processing using Apache Kafka, RabbitMQ, and JMS for event-driven trading architecture, enabling real-time price feeds and trade settlement workflows.

●Built cloud-native trading applications on AWS (EC2, S3, RDS) and Azure infrastructure, leveraging microservices architecture

for scalable algorithmic trading and risk management systems.

●Integrated AWS S3 for secure file storage and retrieval, connecting backend services to cloud-based storage efficiently.

●Conducted cloud cost optimization and resource utilization monitoring, improving efficiency while maintaining high performance for mission-critical apps.

●Configured CI/CD pipelines using Jenkins, Maven, and Git, automating build, test, and deployment processes for faster release cycles.

●Designed and implemented event-driven microservices using Kafka with asynchronous messaging, schema evolution handling, and consumer group optimization.

●Developed Spring Integration flows using messaging channels, adapters, and transformers to orchestrate backend workflows.

●Wrote comprehensive test suites using Spring Boot Test, JUnit5, Mockito, and Hamcrest, achieving isolated unit, integration, and contract testing coverage.

●Used IntelliJ IDEA advanced debugging (hot-swap, step-through debugging, breakpoints) to troubleshoot complex microservice interactions.

●Monitored Git repository for branch integrity and release readiness, maintaining smooth collaboration across multiple teams.

●Collaborated with QA and DevOps teams to integrate automated testing and deployment, reducing errors and speeding up production releases.

●Ensured continuous integration of code changes into QA and production environments, reducing manual intervention and deployment errors.

●Designed and documented RESTful APIs using Swagger/OpenAPI, ensuring adherence to design specifications and improving cross-team collaboration.

●Mentored junior developers through code reviews, design discussions, and best practices in Java, Spring Boot, and Angular, improving team code quality and delivery consistency.

●Participated in all phases of the Software Development Life Cycle (SDLC) including requirements analysis, system design, development, unit/integration testing, deployment, and production support.

●Designed and documented APIs using REST and GraphQL for seamless integration.

●Managed Kafka clusters with Zookeeper for distributed event-driven systems.

●Implemented automated testing using JUnit, Mockito, Power Mock, and Cucumber.

●Implemented unit and integration tests using JUnit, Mockito, and Power Mock, maintaining high code coverage and ensuring production stability.

●Supported software release activities by coordinating CI/CD pipelines, validating deployment readiness, and ensuring smooth promotion of applications across QA and production environments.

●Integrated monitoring and logging solutions using ELK Stack (Elasticsearch, Logstash, Kibana) and Splunk for proactive system monitoring and troubleshooting government applications.

Environment: Java 11/17, Spring Boot, Spring MVC, Spring Core, Spring AOP, Spring Integration, Spring Security, Hibernate ORM, Angular 12/20, TypeScript, HTML5, CSS3, Bootstrap, Material UI, D3.js, REST, SOAP, Drools, Kafka, RabbitMQ, JMS, Oracle, MySQL, PostgreSQL, AWS EC2, S3, RDS, Lambda, CloudFormation, CloudWatch, Auto Scaling, Jenkins, Git, Maven, Docker, Kubernetes, JUnit5, Mockito, Power Mock, Hamcrest, Selenium, IntelliJ IDEA, Swagger/OpenAPI, Agile/Scrum, ELK Stack, Splunk.

Client :Huntington national bank

Role: Sr Java Full Stack Developer Nov 2021 – June 2023

Roles & Responsibilities

●Built responsive and dynamic web applications using React.js, Redux, and TypeScript, ensuring seamless user experiences for banking dashboards and financial transaction modules.

●Developed reusable React components with Hooks and Context API, improving maintainability and reducing redundant code across multiple online banking products.

●Designed and developed responsive modules based on Business Requirements using HTML5, CSS3, Bootstrap, JavaScript, TypeScript, React.JS, NodeJS and SQL server.

●Integrated REST APIs into React applications, displaying real-time account data, loan status, and transaction history to enhance customer self-service features.

●Designed secure form validations and client-side error handling using React and JavaScript to prevent data entry errors in sensitive banking forms.

●Designed and developed RESTful APIs using Java 11, Spring Boot, and Spring MVC, supporting millions of secure banking transactions daily.

●Created batch jobs with Spring Batch to automate periodic interest calculations, billing cycles, and reporting processes.

●Implemented Spring Security and OAuth2.0 for role-based authentication and authorization, ensuring compliance with strict banking security standards.

●Worked on gradual modernization of backend services running on Java 11, aligning newer modules and enhancements toward Java 17 standards, ensuring compatibility with evolving Spring Boot and Spring Cloud components.

●Improved backend performance and code maintainability by adopting newer Java language enhancements (Streams, Optional usage patterns, improved concurrency utilities) while maintaining backward compatibility for existing banking and loan-processing systems.

●Used Git/GitHub for version control, managing feature branches, code reviews, and collaborative pull requests with distributed teams.

●Implemented test-driven development (TDD) for trading algorithms with JUnit, Mockito, TestNG, and Selenium, establishing

automated testing for high-frequency trading systems with Jenkins.

●Integrated monitoring and logging solutions using ELK Stack (Elasticsearch, Logstash, Kibana) and Splunk for proactive system monitoring and troubleshooting government applications.

●Implemented Spring Cloud features including Config Server, Eureka Service Discovery, Feign Clients, and Circuit Breaker patterns.

●Built Spring Integration flows using message channels, gateways, transformers, and adapters to orchestrate complex backend workflows.

●Identified performance bottlenecks, memory leaks, and functional defects in Java and Spring Boot applications, implementing optimized solutions that improved system stability and response time.

●Developed asynchronous, event-driven microservices using Kafka with schema evolution, consumer group management, and partition strategy optimization.

●Executed isolated unit tests and integration tests using Spring Boot Test, MockMvc, JUnit 5, and Ham crest matchers.

●Configured Gradle build scripts to streamline microservice builds, improve dependency management, and optimize CI/CD workflows.

●Built database migration scripts for transitioning legacy applications to cloud-based PostgreSQL systems.

●Worked on PL/SQL procedures for monthly reporting, loan amortization schedules, and financial forecasting.

●Deployed applications on AWS EC2 instances with autoscaling groups to handle fluctuating banking traffic loads.

●Utilized AWS S3 buckets for secure document storage such as statements, loan agreements, and check images.

●Asynchronous processing of high-volume payment transactions with Kafka and ZooKeeper cluster management.

●Performed isolated layer testing across microservices using JUnit 5, Mockito, Ham crest, and Spring Boot Test.

●Created Jenkins pipelines for CI/CD, automating build, testing, and deployment of microservices on AWS.

●Worked with JIRA and Confluence for backlog management, sprint tracking, and technical documentation.

●Created CI/CD pipelines in Jenkins integrated with AWS Code Deploy to automate build and release processes.

Environment: Java 11, Spring Boot, Spring MVC, Spring Security, Spring Cloud, Hibernate ORM, JPA, Spring Batch, Spring Integration, React.js, Redux, TypeScript, HTML5, CSS3, Bootstrap, JavaScript, Node.js, REST, Kafka, RabbitMQ, Pub/Sub, CQRS, Circuit Breaker, Oracle, PostgreSQL, MongoDB, AWS EC2, S3, Lambda, Docker, Kubernetes, Jenkins, AWS Code Deploy, JUnit, Mockito, TestNG, Selenium, Jasmine/Karma, Git/GitHub, Jira, Confluence, Agile/Scrum.

Client: State Of Nebraska

Role : Java Full Stack Developer April 2019 – Oct 2021

Responsibilities

●Designed and developed highly interactive Angular components, directives, and services for state-level citizen service applications, ensuring responsive UI design with HTML5, CSS3, and Bootstrap to provide cross-browser compatibility.

●Built single-page applications (SPA) in Angular with TypeScript and RxJS observables to handle real-time data updates from the backend, enhancing user experience by reducing reloads and latency.

●Optimized rendering performance by leveraging Angular Change Detection strategies, lazy loading modules, and route guards, ensuring application speed and security for daily active users.

●Collaborated with UI/UX designers to implement pixel-perfect designs using SCSS, Flexbox, and Bootstrap grid, ensuring accessible and responsive layouts across devices.

●Designed and developed Spring Boot microservices to support various government workflows, including case management, financial processing, and citizen service applications.

●Implemented RESTful services using Spring Boot and Spring MVC to expose APIs that integrated with Angular front-end components, ensuring smooth communication between layers.

●Created batch jobs with Spring Batch to handle large-scale data ingestion from external sources such as county databases and 3rd- party service providers.

●Designed and maintained complex relational schemas in Oracle and PostgreSQL, supporting applications handling citizen records, compliance, and payment data.

●Developed SQL queries, stored procedures, and triggers for financial reporting and compliance processing across multiple state systems.

●Applied Hibernate caching and database connection pooling to optimize query performance in high-traffic applications.

●Created data access layers using Spring Data JPA, simplifying CRUD operations and improving maintainability.

●Implemented asynchronous processing using Java multithreading, Completable Future, and Kafka consumers, improving scalability of backend services.

●Migrated on-premises Java applications to Microsoft Azure, leveraging Azure App Services and Azure Kubernetes Service (AKS)

for scalability and performance optimization.

●Integrated application logging and monitoring using Azure Application Insights and Log Analytics, improving real-time troubleshooting and performance tuning.

●Configured Azure Blob Storage and Azure Functions for handling bulk file uploads and asynchronous data processing in citizen service applications.

●Used Git and Azure Repos for version control, branching, and merging strategies, ensuring smooth collaboration within the development team.

●Provided production support and bug fixing post-deployment, ensuring zero downtime and quick resolution of critical issues.

●Implemented CI/CD pipelines with Jenkins and Azure DevOps to automate build and deployment workflows for Angular front end and Java back end.

●Participated in Agile Scrum ceremonies such as sprint planning, daily standups, and retrospectives, ensuring timely delivery of high- priority features.

●Developed unit and integration tests using JUnit, Mockito, and Jasmine/Karma for Angular components, achieving high code coverage across applications.

●Applied event-driven design patterns (CQRS, Pub/Sub) for scalable and asynchronous citizen service data processing.

Environment: Java 8+, Spring Boot, Spring MVC, Spring Data JPA, Spring Batch, Hibernate ORM, Angular 2+, TypeScript, RxJS, HTML5, CSS3, Bootstrap, REST, Kafka, Pub/Sub, CQRS, Oracle, PostgreSQL, Azure App Services, AKS, Blob Storage, Azure Functions, Application Insights, Jenkins, Azure DevOps, JUnit, Mockito, Jasmine/Karma, Git, Agile/Scrum.

Client :Staples

Role:Java Developer, Feb 2019 – March 2021

Responsibilities

●Built responsive user interfaces using React.js, Redux, and JavaScript (ES6) to create reusable components that enhanced page load performance and delivered a smooth user experience for Staples’ e-commerce platform.

●Designed and implemented scalable back-end services using Java 8, Spring Boot, and Spring MVC, ensuring modularity and reusability across multiple Staples projects.

●Developed RESTful APIs with Spring Boot for order management, product catalogs, and payment services, enabling smooth integration with both front-end and third-party vendors.

●Designed and developed React hooks and functional components to handle complex state management across multiple modules, improving code readability and reducing defects in production.

●Collaborated with UX/UI designers to translate wireframes into pixel perfect React components, using HTML5, CSS3, and Bootstrap to ensure accessibility across multiple devices.

●Written clean, modular, and reusable code in React to support scalability and maintainability. Implemented state management in React using tools like Redux or Context API to handle complex application states.

●Integrated RESTful APIs with React to display dynamic content, including inventory updates and customer orders, ensuring near real-time synchronization with backend services.

●Implemented microservices architecture using Spring Cloud components for service discovery, load balancing, and fault tolerance, improving system resilience and uptime.

●Applied Java Multithreading to manage concurrent order processing tasks, ensuring faster execution of high-volume business operations.

●Enhanced User Interface Interactivity with jQuery and Bootstrap played a critical role in the project by providing a comprehensive framework for developing responsive and mobile-first web pages.

●Leveraged Hibernate and JPA to implement ORM solutions, handling millions of database transactions with optimized query performance.

●Designed and optimized relational schemas in Oracle and MySQL databases to support high-transaction modules like inventory management and order tracking.

●Created complex SQL queries, stored procedures, triggers, and views to support reporting dashboards and real-time insights for business stakeholders.

●Used MongoDB for unstructured data storage such as product metadata and customer browsing history, enhancing personalized recommendations for end users.

●Integrated Spring Data JPA with multiple databases to ensure seamless persistence and optimized query execution

in microservices.

●Integrated backend services with message brokers (Kafka, RabbitMQ) to handle asynchronous communication, reducing response time for user-facing applications.

●Migrated several on-prem modules to AWS Cloud, leveraging EC2, S3, and RDS for hosting services and storage, which reduced operational.

●Used AWS Lambda functions for serverless event-driven tasks like product search indexing, significantly improving performance while lowering infrastructure costs.

●Secured cloud applications using AWS IAM roles, security groups, and Key Management Service (KMS), ensuring compliance with Staples’ enterprise security standards.

●Monitored application health and logs via AWS CloudWatch, enabling quick detection and resolution of performance issues.

●Implemented CI/CD pipelines with Jenkins and AWS Code Pipeline to automate build, test, and deployment processes, reducing deployment time from hours to minutes.

●Implemented data migration pipelines from legacy systems into Staples’ modern database infrastructure using Java batch jobs and ETL processes.

●integrated backend services with Kafka and managed ZooKeeper clusters for messaging coordination.

●Used Git and GitHub for version control, branching, and merging strategies, ensuring smooth collaboration among distributed development teams.

●Automated builds and deployments using Maven, Jenkins, and Docker, improving release efficiency and reducing human errors in deployment cycles.

●Followed Agile Scrum methodology with sprint planning, daily stand-ups, and retrospective meetings, improving productivity and sprint deliverables.

●Implemented JUnit and Mockito for unit and integration testing, ensuring robust test coverage before production releases.

Environment: Java 8, Spring Boot, Spring MVC, Hibernate ORM, JPA, React.js, Redux, Node.js, JavaScript (ES6), HTML5, CSS3, Bootstrap, REST, SOAP, Kafka, RabbitMQ, Spring Cloud, Oracle, MySQL, MongoDB, AWS EC2, S3, RDS, Lambda, Jenkins, Maven, Docker, JUnit, Mockito, Selenium, Git/GitHub, Agile/Scrum.

Client : Oaks Street Health

Role Software Developer Aug 2016 – Jan 2019

Responsibilities

●Built responsive and interactive web applications using React.js, Redux, JavaScript (ES6), and Bootstrap, ensuring seamless rendering across devices for clinical staff dashboards.

●Developed custom reusable React components for patient intake forms and medical history capture, reducing duplicate code and improving maintainability.

●Optimized UI performance with React hooks and lazy loading, which reduced page load times and improved physician user experience.

●Designed batch processing jobs with Spring Batch for handling insurance claim submissions and processing bulk patient records.

●Collaborated with designers to translate wireframes into pixel-perfect HTML5, CSS3, and React-based UI, ensuring compliance with healthcare accessibility standards.

●Integrated REST APIs into React components using Axios and implemented global state management with Redux, streamlining patient data flow across applications.

●Designed and implemented RESTful APIs using Java 8, Spring Boot, Spring MVC, and JPA, enabling secure access to patient profiles and scheduling systems.

●Migrated legacy monolithic modules to Spring Boot microservices, improving modularity and simplifying deployments.

●Integrated Spring Security with OAuth2 for user authentication, ensuring compliance with HIPAA data security requirements.

●Used Material-UI and Bootstrap frameworks to create user-friendly components that followed healthcare accessibility compliance standards.

●Enhanced UX by integrating form validations and error handling on critical healthcare forms such as patient intake and insurance submission.

●Utilized Hibernate ORM for mapping patient and physician data to relational databases, reducing manual query overhead.

●Designed and optimized SQL Server and PostgreSQL schemas for handling structured patient, insurance, and scheduling data.

●Applied database indexing and query optimization techniques to reduce processing time for large datasets.

●Created and optimized fund accounting database objects using Oracle, MySQL, PostgreSQL, and JPA/Hibernate for portfolio data, trade settlements, and regulatory reporting systems.

●Integrated MongoDB for unstructured medical data such as patient notes and diagnostic images.

●Applied database indexing and query optimization techniques to reduce processing time for large datasets.

●Deployed and managed applications on Azure App Services for scalable and secure hosting of healthcare applications.

●Implemented Azure Functions for serverless execution of asynchronous healthcare workflows, like appointment reminders and email notifications.

●Monitored applications using Azure Monitor and Application Insights, ensuring uptime and quick resolution of performance issues.

●Configured Azure Key Vault for managing secrets and database credentials, strengthening system security.

●Leveraged Azure DevOps Pipelines to automate CI/CD builds and deployments of both Java microservices and react front-end apps.

●Built automated pipelines with Azure DevOps for unit testing, integration testing, and code quality checks using SonarQube.

●Established CI/CD pipelines using Jenkins, Maven, and Git for fund management systems, automating regulatory reporting builds and deployments across Azure environments.

●Used Git and Azure Repos for version control, implementing feature branching and code review best practices to maintain high code quality.

●Applied TDD practices with JUnit and Mockito for backend testing and Jest/Enzyme for front-end unit testing.

●Designed comprehensive testing for fund management workflows using Selenium, JUnit, Mockito, and TestNG, implemented

code quality standards using SonarQube for regulatory compliance and audit requirements.

Environments: Java 8, Spring Boot, Spring MVC, Hibernate ORM, JPA, React.js, Redux, JavaScript, HTML5, CSS3, Bootstrap, Material UI, REST, Spring Boot Microservices, Batch Jobs, SQL Server, PostgreSQL, MongoDB, Oracle, Azure App Services, Azure Functions, Azure Monitor, Azure Key Vault, Jenkins, Maven, Azure DevOps, JUnit, Mockito, Jest/Enzyme, Selenium, Git, SonarQube, Agile/Scrum.

Client :T-mobile

Role: Software Developer Feb 2014– Aug 2016

Responsibilities

●Assisted in developing AngularJS-based single-page applications to manage telecom service plans, gaining experience in writing modular controllers and directives.

●Worked with HTML5, CSS3, and JavaScript (ES5) to design user-friendly account management screens that improved the customer self-service experience.

●Integrated REST APIs into Angular views for displaying real-time customer billing and usage information.

●Implemented basic form validations, data binding, and DOM manipulations using AngularJS and jQuery to ensure smooth user interactions.

●Contributed to backend development using Java 7/8, JSP, and Servlets, working closely with senior developers on billing system enhancements.

●Supported the creation of Spring MVC controllers and services, helping to expose customer information securely to front-end applications.

●Participated in the development of SOAP-based and RESTful web services, which allowed integration with internal telecom systems.

●Assisted in implementing Hibernate mappings to connect Java objects with relational database tables for storing customer profile details.

●Wrote basic SQL queries, stored procedures, and triggers on Oracle Database to support backend services for billing and customer management.

●Helped optimize existing SQL queries by adding indexes and refining joins, improving response time in reporting modules.

●Supported data validation and migration activities from legacy systems into relational databases during modernization efforts.

●Learned version control practices using Git and SVN, including branching, merging, and maintaining development codebase.

●Gained exposure to AWS EC2 instances for deploying test builds and learning basic cloud hosting concepts.

●Helped configure S3 buckets for storing telecom documents and basic reports, under guidance from senior engineers.

●Learned version control practices using Git and SVN, including branching, merging, and maintaining development codebase.

●Actively participated in Agile Scrum ceremonies, contributing to sprint planning, stand-ups, and retrospectives to improve delivery efficiency.

●Collaborated with QA teams using JIRA to track bugs, create test cases, and ensure production readiness.

●Performed unit testing with JUnit for Java classes and helped debug front-end defects with Chrome Developer

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