Hire the Best J2SE Specialists in Lahore, PK

I'm developing Android App with past experience in Java flavors (J2SE & J2ME). Server Access using Cell Phone is one of my initial apps, developed to access server with public IP. In my recent app developments, location based attendance system has been developed for a client using mobile android app which interacts with JavaScript & CSS based Web Page to conclude results.

🚀 I build scalable backend systems and full-stack applications for SaaS platforms, startups, and enterprises — with 5+ years shipping production Java / Spring Boot systems, and hands-on MERN stack experience when projects call for a JavaScript-based full-stack build. I currently work as a Senior Software Engineer on Xcelerate, a microservices-based SaaS platform for restoration companies, where I develop and maintain 20+ Spring Boot microservices, build real-time messaging systems, and integrate third-party platforms like QuickBooks, RingCentral, Zapier, and Encircle. What I can help you build: ✔ Java & Spring Boot backend systems ✔ Microservices architecture & REST APIs ✔ MERN stack applications (MongoDB, Express, React, Node.js) ✔ Third-party integrations (QuickBooks, Stripe, Twilio, Zapier, RingCentral) ✔ Cloud deployments — AWS, Azure, GCP ✔ CI/CD pipelines (Jenkins, GitHub Actions), Docker ✔ Database design & query optimization (PostgreSQL, MySQL, MongoDB) ✔ Legacy system modernization (Java 8 → Java 21 migrations) Highlights: Led backend development across 20+ microservices for Xcelerate, a live SaaS platform for restoration companies Migrated infrastructure from VMs to Azure App Services, implementing Azure Front Door for traffic routing and load balancing Built WS Glam, a full-stack e-commerce platform from scratch — frontend, backend, admin panel, payment integration, and role-based access control Integrated Stripe subscription billing for Remojo and overhauled its backend architecture for scale Built a custom AML (Anti-Money Laundering) system from scratch, including case management tools and fraud detection workflows I think in terms of failure modes before I write code — what happens when a webhook fires twice, when an API rate-limits mid-sync, when a migration needs to run without downtime. I communicate proactively and hand off production-ready code with documentation to match. Let's talk about what you're building — I'll give you a straight technical assessment and a clear path forward.

🏆 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.

I build backend systems that process real money, currently as a Java Engineer at i2c, a fintech payment processor handling Visa and UnionPay transactions. My focus: Java / Spring Boot microservices, REST APIs, and cloud infrastructure that's built to scale. I bring 2+ years of production experience delivering distributed systems on AWS, along with integrations across payment, compliance, and enterprise platforms. My work includes integrating AI/ML-powered platforms. What I work with: → Backend: Java (Spring Boot, Spring Security, Spring MVC), Node.js, Kafka, Redis → Database: PostgreSQL, MySQL, Informix DB2 → Cloud & DevOps: AWS (Lambda, S3), Docker, Nginx, GitHub Actions CI/CD → Frontend: React.js, Redux, Tailwind CSS → Auth & Security: JWT, OAuth2, Firebase Auth I also bring a track record of 130+ freelance projects on Fiverr (Level 2 seller, 82% repeat client rate), so I know how to communicate, hit deadlines, and make clients want to come back.

I help startups and enterprises design, modernize, and scale Java Spring Boot applications with a focus on Microservices, Cloud, Enterprise Integrations, and AI-accelerated development (Claude Code, Cursor & Codex). 🏆 Top Rated Plus Freelancer ⭐ 100% Job Success 💰 $80K+ Earned ⏱️ 3,300+ Hours Worked 🚀 Expertise ✅ Java & Spring Boot Development ✅ REST APIs, Microservices & Spring Cloud ✅ Java 21 Migration & Legacy Application Modernization ✅ Cloud-Native Architecture & Migration (AWS & Microsoft Azure) ✅ Docker, CI/CD & DevOps ✅ Apache Kafka, RabbitMQ & Redis ✅ NetSuite, QuickBooks Online (QBO) & Third-Party API Integrations ✅ AI-Accelerated Development (Claude Code, Cursor & Codex) ✅ Performance Optimization & Database Tuning ✅ PostgreSQL • MySQL • MongoDB 💡 Recent Achievements 🚀 Migrated enterprise applications to Java 21 while maintaining production stability. ☁️ Led infrastructure migration from Virtual Machines to Microsoft Azure. ⚙️ Designed and delivered scalable Spring Boot Microservices for enterprise applications. 🔗 Integrated NetSuite, QuickBooks Online (QBO), and multiple third-party APIs. ⚡ Improved API response times by 60% through backend optimization. 💰 Reduced infrastructure costs by 50% by modernizing a monolithic application into microservices. 🤝 Why Work With Me? ✔ Clean, maintainable, production-ready code ✔ Strong communication and proactive collaboration ✔ Enterprise-grade architecture and scalable solutions ✔ Reliable delivery with a focus on long-term maintainability ✔ Modern development workflow using Claude Code and Cursor to accelerate delivery while maintaining high code quality Let's discuss your project and build a solution that scales with your business.

DataOps Leader with 20+ Years of Experience in Software Development and IT Expertise in a Wide Range of Cutting-Edge Technologies * Databases: NoSQL, SQL Server, SSIS, Cassandra, Spark, Hadoop, PostgreSQL, Postgis, MySQL, GIS Percona, Tokudb, HandlerSockets (nosql), CRATE, RedShift, Riak, Hive, Sqoop * Search Engines: Sphinx, Solr, Elastic Search, AWS cloud search * In-Memory Computing: Redis, memcached * Analytics: ETL, Analytic data from few millions to billions of rows and analytics on it, Sentiment analysis, Google BigQuery, Apache Zeppelin, Splunk, Trifacta Wrangler, Tableau * Languages & Scripting: Python, php, shell scripts, Scala, bootstrap, C, C++, Java, Nodejs, DotNet * Servers: Apache, Nginx, CentOS, Ubuntu, Windows, distributed data, EC2, RDS, and Linux systems Proven Track Record of Success in Leading IT Initiatives and Delivering Solutions * Full lifecycle project management experience * Hands-on experience in leading all stages of system development * Ability to coordinate and direct all phases of project-based efforts * Proven ability to manage, motivate, and lead project teams Ready to Take on the Challenge of DataOps I am a highly motivated and results-oriented IT Specialist with a proven track record of success in leading IT initiatives and delivering solutions. I am confident that my skills and experience would be a valuable asset to any team looking to implement DataOps practices. I am excited about the opportunity to use my skills and experience to help organizations of all sizes achieve their data goals.