⚡ If your system needs to scale, stay secure, and actually work under real-world pressure I’m the person you bring in. I’m a Senior Full Stack Architect with 10+ years of experience designing and building enterprise-grade platforms, microservices ecosystems, and AI-powered applications. I don’t just build features I design systems that don’t break. 💼 What I Help You Achieve Most clients come to me when they face: • A system that’s slowing down or failing at scale • Poor architecture decisions causing long-term issues • Need to integrate AI into real business workflows • Backend that works… but isn’t reliable or secure • A product that needs to go from MVP → production properly 👉 I fix these by building clean, scalable, and production-ready systems from the ground up (or improving existing ones). 🧠 My Core Expertise 🔹 Backend & Architecture (My Strongest Area) • Java (Spring Boot, Spring Security, JPA, Hibernate) • Microservices & event-driven systems • API design & system integrations • Performance optimization & reliability engineering 🔹 Full Stack Development • Angular, React, Next.js • Scalable frontend architecture • Clean, maintainable UI systems 🔹 AI Integration (Where I Add Extra Value) • OpenAI, LangChain, LlamaIndex • RAG pipelines & semantic search • AI agents & workflow automation • Document intelligence systems 👉 I don’t just add AI I integrate it in a way that actually improves business outcomes. ☁️ Cloud & DevOps • AWS architecture & deployment • Docker & CI/CD pipelines • Scalable, distributed systems 🏆 Proven Track Record ✔ 100+ systems delivered (enterprise + startups) ✔ 15,000+ hours of real-world development ✔ Long-term client relationships & repeat work 💡 How I Work (This Is Why Clients Stay) • I think in architecture, not just code • I focus on long-term scalability, not quick hacks • I communicate clearly — no confusion, no guessing • I take ownership from planning → deployment • I build systems that are easy to maintain and extend 🎯 When You Should Hire Me ✅ You need a serious engineer, not just a coder ✅ Your system must be stable, secure, and scalable ✅ You want to integrate AI properly (not just hype) ✅ You care about long-term quality over shortcuts 🚫 Not a Good Fit If ❌ You’re looking for the cheapest option ❌ You need quick fixes without proper architecture ❌ You don’t value clean, maintainable code 🚀 Let’s Build Something That Lasts If you’re building a product where performance, scalability, and reliability actually matter Send me a message with your project details. I’ll quickly tell you the best way to approach it.

Hello! I’m Senior developer with over 10 years of professional experience building enterprise-grade applications, RESTful microservices, and cloud-native solutions. I have successfully delivered projects for clients across Europe, the UK, Australia, India, South Africa, and the USA. ✅ Languages: Java (8–21), Kotlin, Groovy, Python, Node.js, TypeScript ✅ Back-End: Spring Boot, Spring Cloud, Spring Security, Micronaut, Camel, Express.js, NestJs ✅ Front-End: Angular, Vue.js, Nuxt, HTMX, Tailwind CSS, Bootstrap ✅ Databases: PostgreSQL, MySQL, Oracle, MongoDB, Redis, DynamoDB ✅ Cloud & DevOps: AWS, CDK, Cloudformation, ECS, API Gateway, Lambda, Cognito, DynamoDB, Azure, Docker, Kubernetes, Terraform, Jenkins, GitHub Actions, Cloudflare ✅ Architecture: Clean Architecture, Hexagonal, Domain-Driven Design DDD, Microservices, Monolith ✅ Messaging: Kafka, RabbitMQ, ActiveMQ, Artemis ✅ Monitoring: Grafana, Kibana, Datadog ✅ APIs: REST, SOAP, gRPC, GraphQL, Websocket, SSE, tPRC ✅ Build & Tooling: Maven, Gradle, Flyway, Liquibase ✅ Other: Hibernate, JPA, Elasticsearch, Jhipster, Gen Ai, Agentic Ai, Hermes Agent, SDD ✅ Opensource contribution to popular opensource projects like FlowiseAi, AWS PDK, Mongock, Jhipster lite and Jhipster Main generator. You can confidently entrust me with your project, and you will not be let down by our collaboration. I assure you of my strong sense of responsibility and the high standard of the work I deliver, which you can rely on once I become part of your team.

AI Engineer and Solutions Architect with 10+ years of experience building scalable SaaS platforms, enterprise systems, and cloud-native applications. Over the past two years, I have been helping businesses integrate Generative AI, Large Language Models (LLMs), AI Agents, Retrieval-Augmented Generation (RAG), and workflow automation into production systems. I specialize in OpenAI, Claude, GPT-4, LangChain, LlamaIndex, Vector Databases, AI Chatbots, AI Search Systems, and enterprise-grade backend architecture using Python, Java, Spring Boot, AWS, PostgreSQL, MongoDB, Docker, and Kubernetes. I help companies move beyond AI demos and build production-ready AI products that scale securely and reliably. Over the last 10+ years, I’ve architected and scaled SaaS platforms, enterprise systems, and cloud-native applications used by startups and growing businesses across healthcare, fintech, logistics, travel, AI, and real estate industries. I specialize in Java, Spring Boot, Microservices, AWS, PostgreSQL, MongoDB, Kubernetes, and scalable backend architecture for high-performance SaaS platforms. Worked on platforms handling real-time workflows, payment systems, enterprise reporting, AI integrations, booking engines, analytics systems, and multi-tenant SaaS infrastructure. I’ve developed enterprise-grade platforms for healthcare, fintech, e-commerce, and real-time applications, focusing on scalability, security, and long-term maintainability. My expertise includes: ✔ High-performance REST APIs ✔ Microservices architecture ✔ Cloud-native AWS deployments ✔ Authentication & payment systems ✔ Enterprise integrations ✔ Performance optimization Whether you need to modernize a legacy Java application, build a backend from scratch, or scale an existing SaaS platform, I can help architect and deliver reliable production-ready systems. My Core Competencies 1. Java Development: - Core Java: In-depth knowledge of Java’s features, collections, concurrency, and multi-threading - Spring Framework: Expertise in Spring Boot, Spring MVC, Spring Security - Microservices: Designing and implementing microservices architecture with Spring Cloud - API Development: RESTful APIs with JWT, OAuth, and GraphQL integration 2. Mobile App Development: - Android Development: Skilled in developing native Android apps using Java and Kotlin - App Lifecycle: From UI/UX design to API integration and deployment 3. Database & Back-End: - Database Expertise: Proficient in MySQL, PostgreSQL, and MongoDB for secure, scalable data management - ORM: Working with Hibernate for object-relational mapping - Server-Side Scripting: Building efficient backends with Java and Spring. 4. Deployment & Cloud: - Cloud Deployment: Expertise in deploying Java-based applications on AWS, Azure, and Google Cloud - Containerization: Proficient with Docker for application containerization and management 5. Security & Performance: - Application Security: Implementing secure systems with Spring Security, OAuth, and data encryption - Performance Tuning: Optimizing application speed, database queries, and server-side performance AI & Generative AI Expertise ✔ AI Chatbot Development ✔ OpenAI API Integration ✔ Claude AI Integration ✔ GPT-4 Applications ✔ AI Agents & Agentic Workflows ✔ Multi-Agent Systems ✔ Retrieval-Augmented Generation (RAG) ✔ AI Knowledge Bases ✔ Enterprise Search Systems ✔ Semantic Search ✔ Embedding Models ✔ Vector Databases ✔ Document AI ✔ AI Workflow Automation ✔ Conversational AI Platforms ✔ AI SaaS Products ✔ LLM Evaluation & Optimization ✔ Prompt Engineering ✔ AI API Development ✔ AI Automation for Business Processes Industries I Serve - E-Commerce: Custom checkout systems, payment gateway integration, and scalable shopping carts - Healthcare: HIPAA-compliant mobile apps and backend systems for patient management - Finance: Developing secure and efficient transaction systems, real-time data processing - Education: Learning platforms and mobile apps to enhance educational experiences - Travel & Hospitality: Building booking engines, itinerary planners, and travel apps - Real Estate: Custom property listings, user-friendly property search apps What I Can Help You Build - SaaS backends - REST APIs - Microservices architecture - Authentication systems - Payment integrations - Cloud deployment pipelines - Enterprise dashboards If you need a reliable backend engineer to build scalable APIs, SaaS platforms, or cloud-native Java applications, let’s discuss your project. Keywords: Spring Boot, Java Backend, SaaS Development, REST API, Microservices, AWS, Scalable Applications, SaaS Architecture, Platform Engineering, Distributed Systems, Event-Driven Architecture, Cloud-Native Development, Enterprise APIs, Multi-Tenant SaaS, AI Integrations, Kubernetes, Docker, Kafka, DevOps, System Design, Scalable Infrastructure, High Availability Systems, Fintech, Healthcare Platforms, Booking Engines, Real-Time Systems

Java sits at the center of the platforms I build. Spring Boot runs the backend services and APIs, handling business logic, data access, and the core behavior of the system. Many of these platforms pair a Spring Boot backend with Angular on the frontend, forming structured web applications such as internal dashboards, operational platforms, and SaaS systems used by teams every day. Angular provides the application interface while the Java backend manages services, data, and integrations behind the scenes. Python also comes into play when automation or data workflows are needed. Small services and scripts written in Python handle background tasks, integrations, and operational processes that support the main platform. Java and Spring Boot handle the backend services, Angular runs the platform interface, and Python supports automation and background tasks.

Hello, I am an experienced Full-Stack Developer with over 12 years in the software industry. Throughout my career, I have contributed to projects across a diverse range of industries, including E-commerce, Wellness & Fitness, EdTech, Social Media, Hospitality, Retail, Fintech, Media & Entertainment, and Refineries, among others. Here’s a brief overview of my expertise: 🔹 Backend Development: Java, Spring Boot, JPA, Spring Security, Batch Processing, REST APIs, Microservices Architecture. 🔹 Frontend Development: HTML5, CSS3, JavaScript, Angular, React.js. 🔹 Databases: PostgreSQL, MySQL, Derby, MongoDB, DynamoDB. 🔹 AWS & Cloud Services: EC2, VPC, RDS, S3, Elastic Beanstalk, Cognito, SES, CloudFormation, ECS, ELB. 🔹 Virtualization & DevOps: Docker, Docker Compose, CI/CD Pipelines, Jenkins, CircleCI, CodePipeline, Codemagic. 🔹 AI/ML & Intelligent Systems: - Generative AI Integration - OpenAI APIs / LLM Integration - AI Chatbot Development - Machine Learning Model Integration - Prompt Engineering - AI-powered Automation Solutions - NLP (Natural Language Processing) - Python for AI/ML Workflows 🔹 Development Practices: Agile Methodologies, System Design, Scalable Architecture, Performance Optimization, Secure Application Development. 📱 Full Stack Developer 🌐 Backend Developer 💻 Frontend Developer ✅ On Time Delivery ✅ Quick Response ✅ Always Online ✅ Quality Work ✅ Client Satisfaction I have had the privilege of working on a variety of solutions and am comfortable handling both existing and new projects. I have had the opportunity to assist numerous clients in achieving their business goals, and I would be delighted to support you in the same way. Thank you for taking the time to visit my profile. Feel free to reach out—whether you’d like to discuss a project, share ideas, or simply connect. I would be delighted to collaborate and explore how I can support your initiatives. Feel free to 𝗗𝗠 𝗺𝗲 𝗼𝗿 𝗶𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 to your project on Upwork.

I’m a full-stack developer with 8+ years of experience in Java, Spring Boot, Angular, and FlutterFlow, building scalable web and mobile applications. I focus on crafting clean backend architectures, intuitive user interfaces, and reliable solutions that perform under real-world demands. Over the years, I’ve delivered projects across different industries, helping teams improve efficiency and create better user experiences. If you’re looking for someone who can turn your ideas into high-quality, future-ready software, let’s connect.

🟢 𝗣𝗮𝗿𝘁 𝗼𝗳 𝘁𝗵𝗲 𝗧𝗼𝗽 𝟭% 𝗘𝘅𝗽𝗲𝗿𝘁-𝗩𝗲𝘁𝘁𝗲𝗱 Full-Stack Developers on Upwork 🚀 Specializing in 𝗔𝗻𝗴𝘂𝗹𝗮𝗿 (𝟭𝟴+), 𝗝𝗮𝘃𝗮 (𝟭𝟳+), 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁, 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻, 𝗔𝗣𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, 𝗙𝗶𝗻𝘁𝗲𝗰𝗵, and Scalable Web Applications. With 𝟭𝟬+ 𝘆𝗲𝗮𝗿𝘀 delivering robust, maintainable, and scalable software solutions, I combine front-end expertise in Angular and back-end mastery with 𝗝𝗮𝘃𝗮 𝗮𝗻𝗱 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 𝘄𝗶𝘁𝗵 𝗔𝗜 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝘀𝗸𝗶𝗹𝗹𝘀 including 𝗚𝗣𝗧-𝟰, 𝗟𝗮𝗻𝗴𝗖𝗵𝗮𝗶𝗻, 𝗖𝘂𝗿𝘀𝗼𝗿 𝗔𝗜, 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗮𝗻𝗱 𝗡𝗼𝗱𝗲.𝗷𝘀. I build powerful AI-driven automation, chatbots, and API workflows. 𝗪𝗵𝘆 𝘄𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝗺𝗲? ✅ 𝗗𝗲𝗲𝗽 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 𝗔𝗻𝗴𝘂𝗹𝗮𝗿 & 𝗝𝗮𝘃𝗮 – clean, scalable code optimized for performance ✅ 𝗔𝗜 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝘀𝗸𝗶𝗹𝗹𝘀 – GPT-4, LangChain, Cursor AI, OpenAI API, Python, Node.js ✅ 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀 – AWS, Kubernetes, Docker, CI/CD pipelines ✅ 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 & 𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗔𝘀𝘀𝘂𝗿𝗮𝗻𝗰𝗲 – unit & integration testing with Jest, JUnit, Selenium ✅ 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 & 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 – Stripe, Braintree, PayPal, Sendinblue, plus fintech platforms ✅ 𝗧𝗿𝘂𝘀𝘁𝗲𝗱 𝗯𝘆 𝘀𝘁𝗮𝗿𝘁𝘂𝗽𝘀 & 𝗲𝗻𝘁𝗲𝗿𝗽𝗿𝗶𝘀𝗲𝘀 – 50+ projects delivered successfully ✅ 𝗙𝗮𝘀𝘁, 𝗰𝗹𝗲𝗮𝗿 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 & 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝘁𝗼 𝗸𝗲𝗲𝗽 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝘁𝗿𝗮𝗰𝗸 𝗖𝗿𝗲𝗱𝗲𝗻𝘁𝗶𝗮𝗹𝘀 & 𝗕𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱 ⭐ Oracle Certified Java Professional ⭐ Neural Networks and Deep Learning (DeepLearning.AI) ⭐ Lecturer at Russian-Armenian University (RAU) ⭐ Computer Science graduate, American University of Armenia 𝗖𝗹𝗶𝗲𝗻𝘁 𝗣𝗿𝗮𝗶𝘀𝗲: "Oleg integrated GPT-4 APIs seamlessly, creating a chatbot that boosted our customer engagement by 40%." – AllAboutCustomers "Delivered LangChain automation ahead of schedule, saving us thousands in manual work." – BobbyTech 🚀 Ready to build your next AI or fintech solution with a trusted expert? Message me today and let’s create something amazing!

I build scalable backend systems using Java & Spring Boot that handle real-world traffic without breaking.I also support Angular frontend development to deliver complete end-to-end web applications. With 6+ years of experience, I specialize in developing robust APIs, microservices architectures, and cloud-based systems that are reliable, secure, and built for production. If you're facing issues like slow APIs, poor scalability, or need a backend built from scratch. I can help you design and implement a solution that actually works under load. What I can help you with: -Build REST APIs using Spring Boot & Spring Cloud -Design and develop microservices architecture -Backend performance optimization & scalability improvements -Database design (PostgreSQL, MySQL, MongoDB, Redis) -Secure applications using Spring Security & JWT -AWS deployment (SQS, SNS, ECS, Kafka) -Docker & CI/CD pipeline setup -Angular frontend support for full-stack delivery Experience Highlights: -Built and deployed scalable backend systems for finance, telecom, and SaaS applications -Developed microservices architectures handling production-level traffic -Designed REST APIs with strong focus on performance and maintainability -Integrated complex systems with third-party APIs and cloud services Tech stack: Backend: Java, Spring Boot, Spring Cloud, Hibernate, JPA Architecture: Microservices, REST APIs, Distributed Systems Database: PostgreSQL, MySQL, MongoDB, Redis Cloud & DevOps: AWS, Docker, CI/CD Frontend (Support): Angular, JavaScript, TypeScript I focus on writing clean, maintainable code and delivering solutions that work in real-world production environments. If you need a backend that can grow with your business, let’s connect.

I bring 11+ years of experience in Mobile and Web Development, specializing in backend PHP/Laravel systems and native mobile apps using Kotlin, Swift, Objective-C, and Java. I build scalable, secure, and high-performance solutions tailored to your business needs. Our Agency Since 2016, my dedicated team and I have delivered top-quality digital solutions worldwide. ✔️ 150+ apps and platforms launched in the last year ✔️ $500K+ earned on Upwork ✔️ 122+ projects completed, 9,500+ hours logged ✔️ Nearly 100% client satisfaction ✔️ Experience working with startups and 7-9 figure enterprises My Expertise Backend & Web Development • PHP (Laravel, Symfony), MySQL, PostgreSQL, REST APIs, OAuth2, JWT Mobile App Development • Native Android (Java, Kotlin), iOS (Swift, Objective-C) • Cross-platform and API integrations Cloud & DevOps • AWS, Docker, CI/CD pipelines, scalable infrastructure Security & Authentication • Secure user authentication, SSO, role-based access control Why Work With Us? ✅ Custom solutions aligned to your goals and budget ✅ Agile development with clear milestones and communication ✅ Robust, well-tested, and maintainable code ✅ Competitive pricing with no surprises ✅ Proven success across fintech, eCommerce, logistics, and more Industries Served Finance, HealthTech, Logistics, E-commerce, SaaS, Real Estate, and more. What Clients Say "Fast, reliable, and communicative — delivered exactly what we needed on time." – Alexey Levashev, ZOOM International 𝗪𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝗯𝗲 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗳𝗼𝗿 𝗮 𝟑𝟎-𝟔𝟎 𝗺𝗶𝗻𝘂𝘁𝗲 𝗳𝗿𝗲𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻? During this meeting, we will: ✔️ Discuss your project goals, challenges, and priorities ✔️ Outline a clear roadmap and cost estimate ✔️ Identify the best tech approach for your vision Send me a message to schedule your session. Looking forward to building something great together! Best regards, Stas

👋 Hello I help startups and businesses launch scalable SaaS platforms, secure APIs, and production-ready systems that actually work, not just prototypes. With 4+ years of real-world experience, I build systems that automate workflows, integrate payments, and make teams more productive, all deployed reliably on AWS. I help businesses save time, reduce errors, and scale operations by providing secure, maintainable, and production-ready software solutions. 🎯 Here’s what I help clients achieve 🔥 Secure backends & APIs: Spring Boot microservices, authentication, and role management 🔥 Scalable AWS deployment: EC2, Nginx, SSL, CI/CD pipelines, production monitoring 🔥 Business dashboards & admin panels: Angular and NestJS enterprise dashboards 🔥 CRM & workflow automation: Reporting, messaging integrations, business processes 🔥 Fintech & payment systems: MPGS, 3DS challenge flows, mobile money integrations 🔥 AI & automation features: Chatbots, receipt scanning, smart workflows 📂 Recent projects ✅ Healthcare workflow system (HIPAA-aligned) ✅ Full CRM platform (auth, roles, automation workflows) ✅ AI-powered receipt scanner backend ✅ Timeline management system (microservices architecture) ✅ WhatsApp chatbot with Angular + Java admin panel ✅ End-to-end AWS deployment with CI/CD 🌟 I take your idea from system design → backend → frontend → deployment → automation. I deliver fast, reliable, and secure systems built to scale with your business. ✉️ Click Send a Message and let’s discuss how I can help you build a system that actually works. 🚀 Ready to start immediately