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SQL Server Expert with 14+ years of experience in database development, SQL query optimization, performance tuning, and database migration. I help businesses fix slow SQL queries, optimize databases, migrate data reliably, and build high-performance database solutions. 🏆 KEY ACHIEVEMENTS •🚀 Database Migration: Successfully completed 5+ database migration projects, including SQL Server → Oracle and MySQL → PostgreSQL migrations, ensuring data integrity and reliable application compatibility. •⚡ Performance Optimization: Optimized 100+ critical database processes, reducing execution time from approximately 3 hours to just 5 minutes through advanced SQL query optimization and performance tuning. •📊 Report Performance: Optimized 100+ reports, reducing data-fetching time from minutes to seconds through query optimization, indexing, and execution-plan analysis. • 🔧 Database Optimization: Improved database performance, scalability, and reliability through execution-plan analysis, indexing strategies, query optimization, and stored-procedure tuning. •🎯 Business Impact: Delivered faster database processing, improved reporting performance, and reliable data migration solutions for enterprise business applications. 🚀 CORE EXPERTISE 🗄️ SQL Server SQL Query Optimization & T-SQL Development Execution Plan Analysis & Performance Tuning Index Optimization & Performance Troubleshooting Stored Procedures, Functions & Database Development 🔄 Database Migration MSSQL → PostgreSQL | SQL Server → MySQL Schema & Data Migration Data Transformation, Validation & Reconciliation SQL & Stored Procedure Conversion 🏗️ Database Development Database Architecture & Data Modeling Tables, Views, Relationships & Constraints Stored Procedures, Functions & Triggers Database Automation & Optimization 📊 Data Engineering & Analytics ETL/ELT & Data Transformation Data Cleaning & Validation Data Warehousing & Business Intelligence Reporting, Dashboards & Business Analytics 🛠️ DATABASE TECHNOLOGIES Microsoft SQL Server | PostgreSQL | MySQL | Oracle | Snowflake

Transforming Ideas into Scalable Digital Solutions As a Full Stack Developer & Solution Architect, I specialize in designing and delivering high-performance, secure, and scalable web applications tailored to business needs. From concept to deployment, I focus on clean architecture, efficiency, and long-term maintainability. Core Expertise Backend Development Java, Spring Boot, Microservices Architecture, Hibernate Python for automation, integrations, and data processing REST APIs, system integrations, and performance optimization Database design & tuning (MySQL, PostgreSQL, MongoDB) Frontend Development Modern UI development with ReactJS & Angular Responsive design using HTML5, CSS3, Bootstrap Advanced UI libraries: PrimeReact, PrimeAngular, Ant Design AI & Intelligent Integrations Integration with Claude AI and modern LLMs for smart automation AI-powered features like chatbots, content generation, and workflow enhancement DevOps & Tools Docker, CI/CD pipelines, Git (GitHub, GitLab) Cloud-ready solutions with scalable deployment strategies What You Can Expect Clean, production-ready code Scalable and future-proof architecture Strong focus on performance, security, and reliability Clear communication and on-time delivery Let’s build powerful, intelligent, and scalable solutions that drive real business impact. 🚀

🥇 Among on Top #5 Java freelancers UpWork. 🏆 Jobs 100% succeed. ✅ Upwork Skills Certification - Java Developer. UpWork Availability 24/7 Message me anytime. 👋 I guarantee you 100% satisfaction with your work, task, project, or any assistance required. I only take on tasks or projects that align with my skills, ensuring the best outcomes for you. Feel free to interview me first before assigning any project—I don’t charge any consultancy fees; it’s completely free. If you’re a company or need someone for long-term work, don’t hesitate to contact me. I guarantee there will be no issues from my side, whether it’s Java or Spring Boot-related. I have 10 years of experience and have worked with multinational companies, gaining extensive knowledge and expertise. ⚡My past experience with multinational corporations - 1. Madinapps (USA) 100% Succeed. 2. Pairdesk (CANADA) 100% Succeed. 3. Hashtag (UKRAINE) 100% Succeed. ⏱️ My working Hours. ET - 9:30AM TO 4:00PM. PT - 9:30AM TO 2:00PM CT - 11:00AM TO 3:00PM 🎯 My Expertise: 10+ Years of experience in Full-Stack Java Developer✔ Java backend development - Spring Framework - Rest API's Javascript, Angular 2, React based Web front-ends Android Native Mobile Apps Development using Java and Kotlin Test Automation Work in Agile methodologies 🎯 Backend Technologies • Java (jdk8 jdk11 jdk 17) ✔ • Microservices ✔ • RestAPI ✔ • Reactive Spring ✔ • SpringFrameWork (SpringBoot, Spring Security, Spring AOP) ✔ • Spring JPA (Hibernate) ✔ • Junit Mockito ✔ • Kafka ✔ • MySQL, Oracle ✔ • Java Fx ✔ • Java2EE ✔ Frontend & JS • React.js • Angular 2/4 • Vue.js • Angular Js • JavaScript • JQuery • HTML • CSS3

I am a Senior Software Engineer with over 9 years of industry experience. As a Fullstack Developer with a strong focus on backend development, I bring broad expertise across backend, frontend, DevOps, and system design. I am proficient in Java and experienced with Spring Boot, Spring Cloud, Spring AI, Hibernate, JUnit, Mockito, K6, Thymeleaf, React, Vue, Angular, Tailwind, Bootstrap, Docker, Kubernetes, Helm, GCP, AWS, Azure, and VPS. I have worked extensively with various servers and databases, including Postgres, MySQL, Oracle DB, SQL Server, MongoDB, Redis, Elasticsearch, Sqlite, BigQuery, Tomcat, Jetty, Undertow, Netty, Nginx, Apache, Node, ActiveMQ, RabbitMQ, Kafka, PubSub, Apollo, Keycloak, LDAP, Eureka, Consul, Vault, Sleuth, Minio, Alfresco, and Jenkins. My toolset also includes GitHub, GitLab, BitBucket, Jira, Redmine, Trello, Notion, Figma, SSH, TMux, Git, NVim, VSCode, Cursor, Windsurf, IntelliJ, DBeaver, Insomnia, and Chrome. The most common projects I work on include API services, web applications, and enterprise applications, leveraging architectures such as monolith, modulith, and microservices. I am experienced with multiple communication protocols, including REST, GraphQL, SOAP, gRPC, JSON-RPC, XML-RPC, WebSocket, Webhooks, Polling, and OpenAPI. I am open to discussions and project collaborations. Feel free to connect and hire me. Thanks & Warm Regards,

🏆 Top Rated Plus | 14,000+ Hours | 100% Job Success Score | 5★ Feedback 💼 12+ years of Experience | Java · Spring Boot · AWS · DevOps · AI Integration 🚀 FinTech · Banking · Enterprise SaaS · Cloud-Native Systems Over the past 12+ years I have been building production-grade Java backends, scalable cloud infrastructure, and enterprise systems for FinTech, banking, healthcare, and SaaS businesses. Over the last two years I have been helping businesses integrate Generative AI, LLMs, RAG pipelines, and AI workflow automation into production backend systems. I specialize in Java, Spring Boot, Microservices, AWS, PostgreSQL, MongoDB, Docker, Kubernetes, and AI integrations using Claude API, OpenAI, and LangChain - helping companies build reliable, scalable, and production-ready systems that go beyond demos and actually work under real load. 𝐖𝐡𝐚𝐭 𝐈 𝐒𝐡𝐢𝐩 ✔ Production-grade Java backends: Spring Boot, Spring Security, microservices, event-driven systems ✔ Scalable cloud infrastructure: AWS (EC2, ECS/EKS, RDS, Lambda), Kubernetes, zero-downtime deployments ✔ End-to-end DevOps: CI/CD pipelines, Terraform IaC, Docker containerization, GitOps ✔ AI-powered backend features: LLM integrations, RAG pipelines, AI agents, workflow automation ✔ Database design and optimization: PostgreSQL, MySQL, MongoDB, Redis, caching strategies ✔ Full-stack delivery: React/Vue3 frontend integration, REST API design, OAuth2/JWT security 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝟭. 𝐉𝐚𝐯𝐚 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Java 17/21, Spring Boot, Spring Security, Spring Cloud, Spring MVC, Hibernate, Quarkus Microservices architecture, event-driven systems (Kafka, RabbitMQ), REST APIs JWT/OAuth2/RBAC security, API Gateway design, multi-tenant SaaS architecture Legacy modernization, Java 8 → 17/21 migrations, codebase refactoring 𝟮. 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 AWS (EC2, ECS/EKS, RDS, S3, Lambda, IAM, CloudWatch, Route53, ALB) Kubernetes, Helm, ArgoCD - cluster management, autoscaling, zero-downtime deployments Docker, multi-stage builds, container registry management Terraform, CloudFormation - Infrastructure as Code CI/CD: GitHub Actions, Jenkins, GitLab CI/CD, Azure DevOps 𝟯. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐃𝐚𝐭𝐚 PostgreSQL, MySQL, Oracle, MongoDB, Redis Advanced query optimization, schema design, replication, caching strategies JPA/Hibernate ORM, connection pool tuning, performance tuning under production load 𝟰. 𝐀𝐈 & 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 ✔ LLM API Integration -- Anthropic Claude, OpenAI for production backend features ✔ RAG (Retrieval-Augmented Generation) pipelines -- document intelligence, intelligent search ✔ LangChain -- AI-driven workflow automation and conversational backends ✔ AI Agents & Agentic Workflows ✔ AI Chatbot Development ✔ Prompt Engineering & LLM Optimization ✔ n8n Workflow Automation -- connecting AI services and business systems ✔ AI-assisted development -- Cursor AI, Claude Code, GitHub Copilot daily workflow 𝟱. 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 Spring Security, OAuth2, JWT, RBAC across regulated FinTech and healthcare environments HIPAA-compliant system design, secure API architecture, data encryption Audit logging, access control, compliance-grade transaction handling 𝟲. 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 Android development — Java, Kotlin, Android SDK React, Vue3 frontend integration for full-stack delivery 𝐒𝐞𝐜𝐭𝐨𝐫𝐬 𝐈'𝐯𝐞 𝐁𝐮𝐢𝐥𝐭 𝐅𝐨𝐫 • FinTech & Banking: Core banking systems, payment platforms, lending administration, regulatory compliance • Healthcare: HIPAA-compliant microservices, healthcare platform modernization • E-Commerce: Scalable backends, payment gateway integration, inventory systems • Enterprise SaaS: Multi-tenant platforms, workflow automation, API-first architecture • AI Products: RAG systems, LLM-powered backends, intelligent automation pipelines 𝐖𝐡𝐚𝐭 𝐈'𝐯𝐞 𝐁𝐮𝐢𝐥𝐭 • Royal Caribbean International -- Java, Spring Boot, PostgreSQL, RESTful APIs at enterprise scale • FOCUS (National Banking Platform) -- Hibernate, Spring MVC, JasperReports, nationwide loan administration • KredX -- multi-tenant financial trading platform, approval workflows, asset classes • GAP -- e-commerce backend, React, MySQL, Redis, payment gateway integration 𝐑𝐞𝐜𝐞𝐧𝐭 𝐄𝐧𝐠𝐚𝐠𝐞𝐦𝐞𝐧𝐭𝐬 • AI/ML Infrastructure (Active) -- GPU workloads, MLOps pipelines, AWS, real-time AI deployment • Event-Driven Banking Platform ⭐ 5.0 -- Java, Quarkus, async event processing, production FinTech • Java 8 → 11 Migration ⭐ 5.0 -- legacy modernization, long-term enterprise engagement 🚀 Whether you need a Senior Java engineer, a DevOps partner, or someone who can integrate AI into your backend and keep it running in production -- I'm the one who covers all three. 📩 Send me a message. Let's build it right.

Hi! I’m Yaseen, an Advanced Java Developer with over 6+ years of experience, specializing in Java in its different frameworks namely, Java Spring Boot for Backend and Web Developement, Javafx and Java Spring for Desktop Application Development. I’ve successfully worked with 50+ clients worldwide, delivering projects ranging from university apps to complex fintech solutions. I build smooth, scalable, and visually appealing websites and desktop applications. My clients value me for my clear communication, on-time delivery, and commitment to high-quality results. What I Offer: • Full-cycle Web Development - Spring Boot, ReactJS, Spring Cloud, Hibernate/JPA • Desktop Application Development - JavaFx, Java Core, Java Spring • Security : OAuth2, OIDC, JWT, RBAC • Databases: PostgreSQL, MySQL (Schema, Optimization, Implementation) • Distributed Systems: Apache Kafka, RabbitMQ Project Types I’ve Worked On: - Fintech & Banking Websites - E-commerce & Marketplace Platforms - Social Media & Chat Apps - E-Learning / School Systems - Secure Communication Tools - University & Academic Projects I’m currently looking to expand my network on Upwork by collaborating with business owners, startups, software teams, and fellow developers. I’m flexible, deadline-driven, and passionate about building code that users love. 📩 Let’s connect and discuss your project — I’m excited to help bring your idea to life! — Yaseen