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Are you looking to build a high-performance software application from scratch? Or do you need a seasoned technical leader who can effortlessly bridge the gap between complex backend architecture and a highly responsive, visual frontend? With over 13 years of enterprise-level experience, I specialize in taking web systems from a blank canvas all the way to a polished, production-ready end product. Technologies & Frameworks Working Experience (Backend + Front-End) Java Spring Boot Micro-Services REST API MySQL DynamoDB MongoDB Angular 4 Tailwind CSS Svelte 5 + SvelteKit D3.js Fabric.js Dynamic SVG Rendering AWS Cloud Infrastructure (EC2 , ECS , Cloudwatch , Cloudformation , S3 , Lambda , Amplify , Route53 , VPC , Load Balancing , ASGs) Git (Code Managment) Development of Data-Rich Interfaces Whether you are launching a new platform from the ground up or modernizing an existing legacy ecosystem, I bring the technical depth, execution speed, and architectural oversight needed to ensure success.

Android, iOS, Java, .Net Development experts with extensive knowledge of US Healthcare software development and integration. Technosoft is an ISO 9001:2008 certified, IBM Advanced Business Partner, MySQL Partner & CMMI ML2 appraised, company. Healthcare Expertise Include: - HL7, FHIR, C-CDA, CCD, HIPAA, EMR, EHR, m-health, SMART on FHIR, CDS Hooks, cTakes - EPIC, Cerner, AllScripts, Kareo, Athena, Open Dental, HBOC, Siemens, Quest, EHR integration - Custom Interface, Medical Billing, Scheduling, Laboratory Integration, Athena Integration, Kareo, Redox integration Technical Expertise includes: - Python, Django, Celery Beat, Flask - iOS (Objective-C, Swift, Siri, BLE, etc) - Android - Front End Development (JQuery, Ajax, Node.js, AngularJS, ReactJS - Java/J2EE (Spring, Hibernate, JSF, Play framework, Spring Boot, Scala, etc) - .Net ASP.net, VB.net, C#, WPF, WCF, SignalR, Web Forms, Azure - Wearable Devices integration (Misfit, Fitbit, Mi-Band, etc) - Alexa/Alexa Show Skills Development - DiagFlow, Lex, Twilio, NLU, NLP, Siri, and other voice integration technologies. I am a HIMSS Certified Healthcare Security Professional and run my company Technosoft solution. We focus solely on the US healthcare market and are very well versed in HIPAA, HL7, FHIR, SMART on FHIR and other healthcare standards. We have developed video conferencing (WebRTC), EMR, prescriptions, lab orders, lab results, billing, EDI and other Healthcare Information Systems modules. We are also very well versed in fitness, wearable and biometrics devices integration. Summary: - 14+ years Healthcare IT expertise - Software solutions deployed In over one thousand US hospitals/clinics - Strong Exposure to mHealth, webRTC, HIPAA, HL7, FHIR - SEI CMMI Level 2 Appraised - Excellent Communication Skills with hundreds of completed projects. - Experts in iOS, Android, Java/J2EE, .Net, Azure development - Experienced in Agile development with Daily/Weekly SCRUM via Skype or phone availability as per your Timing. - Daily/weekly status report - References available upon request. ✅ Top-Rated - Mobile Application (iOS, iPhone, Android) Developers ✅ Top Rated - Web Application (ASP.net, Java, J2EE) Developers ✅ 5 Star Feedback ✅ 100% Job Success Score ✅ Healthcare Software Experts ✅ With Elance/Upwrok for over 17 years ✅ 10,000+ Hours clocked on Upwork with 100% Client Satisfaction

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,

I build full-stack web and mobile applications end-to-end from database schema to deployed UI for clients who need code that ships, scales and holds up in production. Over the past 6 years I've architected systems from scratch and delivered enterprise-grade software for banking and business platforms, so I bring more than just working code: I bring the security discipline, performance thinking, and clean architecture that production environments demand. What I do best ✔ Backend (Java): Spring Boot, REST APIs, microservices, JPA/Hibernate, SQL & NoSQL, authentication & authorization, third-party integrations ✔ Frontend: React, Node.js, Express, MongoDB (MERN), Responsive and Dynamic web applications, plus Knockout.js for legacy or enterprise stacks ✔ Mobile: React Native for cross-platform iOS & Android apps, hybrid apps with Cordova, and native bridges connecting JavaScript to Java ✔ Full-stack builds: MVPs, dashboards, admin panels, internal tools, and customer-facing web & mobile apps 🔹 Core Skills Java / Spring Boot (Primary Focus) ✔ REST API & Microservices development ✔ Spring Security, JWT, OAuth2 ✔ Payment gateway integrations ✔ JPA / Hibernate & performance optimization ✔ Logging, auditing & exception handling ✔ Third-party integrations MERN Stack ✔ MongoDB, Express.js, React.js, Node.js ✔ Responsive and dynamic web applications Databases & Tools ✔ MySQL, PostgreSQL, MongoDB ✔ Docker 🔹 What You Can Expect ✔ Clean, maintainable, and scalable code ✔ Clear communication & regular updates ✔ Reliable long-term support Whether you need a rock-solid backend, a full-stack web app or a cross-platform mobile build let's talk about how I can help ship it.

✨A Web Developer who is Creating beautiful digital experiences for your brand✨ I'm a professional web developer with 5 years experience and highly skilled in back-end and front-end areas. In my practice, I worked on very complicated projects. This experience helps me achieve the best possible results. I am highly expert in Node.JS ||Vue.js || Next.JS || React || Nest.js || Nuxt.Js || JavaScript, and Typescript projects. Some technologies that I worked with ✅Back-End Technologies • NodeJs • SailsJs • Exress.JS • PHP Laravel Framework • ASP.Net .Python ✅Front-End Technologies • VueJs • AngularJs • Angular • JavaScript/JQuery • Typescript • React • NextJs -HTML / HTML5, CSS / CSS3, LESS, PSD to HTML, TailwindCss, Material UI (mobile responsive), Tailwind CSS, Material UI, Vuetify, Angular Material ✅Databases • , Relational database: PostgreSQL, SQLite MySQL • Oracle • MongoDB, NoSQL database, Firebase/Cloud Store ✅ Hosting / Deployments • Domain configuration, SSL, Heroku, CLI, CI/CD, AWS ec2, dedicated ubuntu servers, Cpanel. ✅Programming Languages • Python •Java •C++ ||C •C# •Assembly Language I have a caliber of working independently and in a close team environment and apply a convincing attitude to every assigned task. Please contact for your outstanding work. Regards, SAM

🏆 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.