Full-stack/blockchain developer with over 4 years of working experience. Tech Stack: •Python, Django, Django Rest Framework, Tornado, Pydantic, FastAPI, NLP •Selenium, Playwright, Web Scraping •C#, .NET, ASP.NET MVC •PostgreSQL, MongoDB, SQL Server, Firebase •JavaScript, Typescript, Node.js •REST API, GraphQL •HTML, CSS, Tailwind CSS •AWS, Docker, Heroku, Kubernetes, Redis •Pytest, Nock, Chai •Vue.js, React.js, Next.js •Solidity, Truffle, OpenZeppelin •Unity •NinjaTrader, PineScript, MetaTrader4

🚀 Introduction: With deep expertise in full-stack development, DevOps leadership, and AWS solution architecture, I focus on turning innovative visions into practical digital solutions. 🌟 Professional Identity: I am a versatile professional skilled in overseeing the full development lifecycle. My work involves developing sophisticated, responsive applications that lead market trends and push technological boundaries. 🛠️ Technical Proficiency: My technical arsenal includes advanced knowledge of front-end technologies like ReactJS and AngularJS, back-end platforms such as NodeJS and Python Django, and mobile frameworks including React Native and Flutter. This extensive skill set allows me to deliver comprehensive and integrated web and mobile solutions. ☁️ Cloud Architecture Mastery: My proficiency in cloud infrastructures like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP) ensures that the applications I develop are scalable, reliable, and ready to meet the demands of tomorrow. 🤝 Client-Centric Philosophy: I approach every project as a partnership, focusing on mutual success. I commit to understanding your needs and delivering solutions that not only fulfill but exceed your expectations. 🚀 DevOps Excellence: Backed by my strong foundation as an AWS Solution Architect and extensive DevOps experience, I ensure that projects are not just completed but are optimized for performance, security, and scalability. 💎 Commitment to Excellence: I am dedicated to delivering exceptional results. Excellence is not just an objective but a standard that defines all my projects. 🌐 Invitation to Collaborate: Ready to embark on a journey to transform your ideas into reality? I am here to guide and support you through every step of creating digital masterpieces. 📞 Contact Me: Reach out to discuss how we can turn your vision into a successful digital project. Let’s create something great together!

As a Senior software developer with 12+ years of experience in web and desktop software development. .NET, Python, NodeJS, React, AI/ML My technical skills include: - ASP.NET Core MVC, WebForm, WinForm, WebAPI, C#, Blazor, ReactJS, jQuery, and JavaScript - Databases: SQL Server, MySQL, MS Access, and PostgreSQL - Cloud Services: Azure and AWS - Third-Party Controls: Telerik and DevExpress - Reporting Tools: DevExpress Reporting, Telerik Reporting, SSRS, and Crystal Reports - Python, Django, Flask, FastAPI, Jupyter Notebook, Selenium, Data Visualization - Web App Development, Data Science, Web/API Scrapping, Machine Learning, AI - API Development, Authentication, Authorization - SQLAlchemy, PostegresDB, MySQL, SQLite, SQLServer, Datasets - Web hosting, Docker, Azure, AWS, Digital Ocean, GoDaddy, Web Hosting - ML Algorithms: linear regression, logistic regression, decision trees, random forests, neural networks, etc - Python Libraries: NumPy, pandas, scikit-learn, tensorflow, etc. - React, JavaScript, jQuery, TypeScript, NextJS - NodeJS, ExpressJS - MongoDB, MySQL, PostgreSQL, SQLServer, SQLite - Redux, Thunk, GIT - JavaScript, HTML, CSS, Tailwind CSS - AWS, Server Hosting I enjoy delivering high-quality, well-structured code to my clients. Please feel free to contact me.

Building a scalable SaaS or enterprise platform requires more than just code. It requires technical ownership, strong architecture, security awareness, and a clear understanding of business logic. As a Python Developer and CTO-level technical partner, I help startups and businesses build secure, scalable, and production-ready web applications. Whether you are launching an MVP, upgrading an existing platform, integrating AI automation, or fixing technical debt, I can handle the full development lifecycle from planning to deployment. I specialize in Python, Django, Django REST Framework, React, Next.js, PostgreSQL, API integrations, SaaS architecture, AI automation, and cybersecurity-focused development. How I Help You Succeed: — Python & Django Development: Secure, scalable backend systems using Django, Django REST Framework, PostgreSQL, and clean API architecture. — SaaS & Enterprise Platforms: MVPs, dashboards, subscriptions, multi-role systems, admin panels, analytics, and scalable business logic. — CTO-Level Technical Ownership: I help with architecture planning, technology decisions, system design, technical audits, and product direction. — AI Automation & Integration: Practical AI features using GPT/LLMs, automation workflows, chatbots, document processing, and smart business tools. — Cybersecurity-Focused Development: Secure authentication, role-based access control, API protection, server hardening, vulnerability awareness, and safer deployment practices. — Modern Frontends: Fast, responsive, and premium user interfaces using React and Next.js. — DevOps & Deployment: VPS, AWS/GCP, Docker, CI/CD pipelines, Nginx, SSL, monitoring, and production deployment support. My Promise: I value clear communication, predictable delivery, and long-term maintainability. You will receive a clear execution plan, regular updates, well-structured code, and a product that is built for real users, not just a development server. Ready to build, secure, or scale your platform? Send me a message or invite me to your job, and let’s discuss your project goals.

I am a Full-Stack Developer with 6+ Years of Experience in Front-End and back-end Development. I have an excellent understanding of how technology can align the requirements of both the business and the customer. Within the past several years, I have worked with other Individuals in a Team Environment & worked solo as a Full-time Freelancer. With such a Diverse Background, I am well-versed in High-end Communication Skills, Excellent Business Practices, and self-motivated Principles for Success. I have developed various Websites for different Businesses like News, Blogs, social media, E-commerce, Custom Business Solutions, Taxi Booking, Travel, Video Streaming, Telemedicine, Healthcare Fitness, Food Delivery, Service Providers, Fintech, EWallet and many more. 👉 MY EXPERTISE & SKILLS: ✅ Backend- - Python - Flask - Django - FastAPI - Django Rest Framework - Django with GraphQL ✅ Database- - Postgres - MySQL ✅ Frontend- - React - Javascript - HTML - CSS 👉 MY PRINCIPLE: ⭐ I can use any Task Management Software the Client Prefers ⭐ Ready to work for 40-50 Hours Per Week. ⭐ Daily Update on your Project. ⭐ Meeting Deadline Efficiently Let's get in touch and see if I am a good match for your project. Warm Regards, Keval V.

🔹 Profile Summary Senior Fullstack Developer with over 8 years of experience building web platforms, AI-driven tools, and real-time applications. Strong background in both frontend and backend development, with a recent focus on integrating Large Language Models (LLMs), building custom AI chatbots, and deploying GenAI applications. Regularly work with teams to ship features using Next.js, React, Node.js, and Python. Familiar with the full lifecycle—from sketching ideas on a whiteboard to pushing code into production and improving it post-launch. 🔹 Skillset AI/ML: OpenAI API, LangChain, LlamaIndex, Pinecone, RAG pipelines, vector databases Frontend: Next.js, React, TailwindCSS, TypeScript, Redux, Zustand Backend: Node.js, Express.js, NestJS, Python (FastAPI), MongoDB, PostgreSQL, Redis DevOps: Docker, GitHub Actions, Vercel, AWS (EC2, S3, Lambda), GCP Other: WebSockets, REST APIs, GraphQL, OAuth, Firebase, Stripe Integration Tools: Git, Postman, VS Code, Jira, Notion

Hello and welcome to my profile! My name is Vadym. I'm a skilled Java and Python developer from 🇺🇦 My expertise is Backend development. But also I have experience with Angular 2+. I continue to improve my skills and already know that the best way to learn something new and evolve as a professional is to work on the projects as a part of a team. My main areas of expertise: Backend: Python, Java Frontend: HTML/CSS –basic, Angular 2+ Frameworks: FastAPI, Spring Framework (SpringMVC, Spring Boot, Spring Data, Spring Security) ORM: Hibernate Testing: pytest, FastAPI TestClient, JUnit, JMeter VCS: Git (GitHub) Databases: PostgreSQL, MySQL, MongoDB, SQLite, MS SQL Server, Supabase Build automation tools: Maven, Gradle API documentation tools: OpenAPI, Swagger IDE: Cursor, PyCharm, IntelliJ IDEA Other: REST API, Lombok, Docker, Postman, Pydantic, Heroku, Stripe, Amazon APIs (general familiarity) Ready for any skills evaluation, test task, technical interview. My main goal is to find an interesting project, so if you need a talented developer with technical background let's discuss our cooperation!

I am an Upwork Expert-Vetted and TOP RATED PLUS Senior Backend Engineer, PHP Developer, API Architect, and DevOps Specialist with nearly 15 years of experience building scalable backend systems, cloud infrastructure, and high-performance web applications. I have completed 15000+ hours on Upwork with consistent 5-star reviews, working with startups, SaaS companies, and enterprise clients to design reliable, secure, and cost-effective server environments. My primary focus is backend engineering, distributed systems, API development, cloud architecture, and infrastructure automation. I specialize in building scalable server-side applications using PHP, Laravel, Python, Django, Flask, and modern backend frameworks. I work extensively with REST APIs, GraphQL, microservices, authentication systems, event-driven architecture, queue-based processing, and high-load backend systems. I help businesses design backend infrastructures that are optimized for performance, scalability, maintainability, and long-term growth. -Core Backend & Server-Side Expertise * PHP, Laravel, Symfony, custom backend frameworks * Python, Django, Flask, FastAPI * REST API development, GraphQL APIs, webhook systems * Backend architecture, microservices, service-oriented design * Authentication systems (JWT, OAuth2, RBAC, SSO) * Queue systems, background jobs, cron workers, async processing * Database optimization, caching layers, API performance tuning * SaaS architecture and multi-tenant backend systems - AI & Intelligent Backend Integrations * OpenAI, GPT-3, GPT-4, ChatGPT integrations * DALL·E and AI-generated media workflows * Machine Learning pipelines * OCR, document processing, object recognition * AI automation workflows and intelligent data processing - Cloud Infrastructure & AWS Expertise * AWS EC2, Lambda, API Gateway, CloudFront * S3, RDS, Route53, VPC, IAM, Cognito * CloudWatch, SES, SQS, SNS, Elasticsearch * Elastic Beanstalk, ElastiCache, CloudFormation * Scalable cloud-native backend deployment - DevOps & Infrastructure Engineering * Docker, Kubernetes, Jenkins, Ansible * CI/CD pipelines (GitHub Actions, GitLab CI, AWS CodePipeline, Azure DevOps, Bitbucket Pipelines) * Infrastructure automation and deployment workflows * Linux server administration and environment provisioning * Performance monitoring, logging, observability, failover strategies - Databases & Performance Optimization * PostgreSQL, MySQL, MongoDB, Redis * Query optimization, indexing, replication * Redis, Memcached, Varnish, custom caching systems * High-performance backend tuning and bottleneck analysis - Backend Engineering Philosophy I specialize in designing backend systems that are not only functional but also scalable, maintainable, and production-ready. My experience includes server architecture planning, API ecosystems, distributed backend logic, queue processing, DevOps pipelines, and cloud-native infrastructure. I have been leading technical teams and delivering complex backend solutions since 2008. Beyond coding, I provide technical consulting, architectural guidance, and infrastructure planning to ensure projects are built correctly from the beginning. I constantly stay up to date with backend engineering trends, cloud technologies, AI integrations, and DevOps practices to ensure I deliver modern, future-proof solutions. - Additional Technologies * Angular, Backbone.js, jQuery * HTML5, CSS3, SASS * Linux administration and server hardening * Security best practices, monitoring, and optimization * Payment APIs, third-party integrations, webhook systems If you are looking for a senior backend engineer who can architect APIs, optimize infrastructure, build scalable server environments, and deliver enterprise-grade backend systems, I’d be happy to discuss your project.

⭐ 𝐈 𝐡𝐞𝐥𝐩 𝐬𝐭𝐚𝐫𝐭𝐮𝐩𝐬 𝐚𝐧𝐝 𝐞𝐬𝐭𝐚𝐛𝐥𝐢𝐬𝐡𝐞𝐝 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞𝐬 𝐛𝐫𝐢𝐝𝐠𝐞 𝐭𝐡𝐞 𝐠𝐚𝐩 𝐛𝐞𝐭𝐰𝐞𝐞𝐧 𝐀𝐈 𝐡𝐲𝐩𝐞 𝐚𝐧𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐯𝐚𝐥𝐮𝐞. As a "𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬" AI Solution Architect with over 𝟗,𝟕𝟎𝟎 𝐡𝐨𝐮𝐫𝐬 on Upwork, I partner with visionary founders, CTOs, and product leaders to transform complex business challenges into 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐀𝐈 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬. I specialize in high-stakes industries including 𝐅𝐢𝐧𝐓𝐞𝐜𝐡, 𝐑𝐞𝐚𝐥 𝐄𝐬𝐭𝐚𝐭𝐞, 𝐇𝐞𝐚𝐥𝐭𝐡𝐂𝐚𝐫𝐞, 𝐄𝐝𝐮𝐜𝐚𝐭𝐢𝐨𝐧, 𝐄𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 𝐚𝐧𝐝 𝐋𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬, where I architect intelligent systems that fundamentally reshape operations, driving significant cost savings and new revenue streams. 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐡𝐢𝐫𝐞 𝐦𝐞 𝐭𝐨: ✅ Automate Mission-Critical Workflows: From eliminating manual data entry to orchestrating autonomous AI agents that handle multi-step business processes, I build solutions that save hundreds of hours weekly. ✅ Build Scalable AI-First Products: I lead the development of cutting-edge AI SaaS platforms, ensuring they are robust, secure, and designed for rapid market deployment. ✅ Implement Secure & Accurate RAG Systems: I specialize in creating Retrieval-Augmented Generation (RAG) systems that provide hallucination-free, contextually relevant insights from proprietary data, crucial for industries with strict compliance needs. ⚡𝐌𝐲 𝐈𝐦𝐩𝐚𝐜𝐭 𝐢𝐧 𝐀𝐜𝐭𝐢𝐨𝐧: - Reduced operational costs by 40% for a logistics firm by deploying an AI agent that optimized route planning and inventory management. - Accelerated product launch by 6 weeks for a FinTech startup, delivering a secure, full-stack AI platform for fraud detection. - Increased lead conversion by 35% for a sales organization through an autonomous AI sales agent that personalized outreach and follow-ups. 🚀𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐲-𝐒𝐩𝐞𝐜𝐢𝐟𝐢𝐜 𝐀𝐈 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬: • FinTech: Secure, hallucination-free RAG systems for investment analysis and fraud detection. • Real Estate: Autonomous AI agents for lead qualification, property matching, and automated valuation. • Logistics: Agentic workflows for route optimization, inventory management, and supply chain automation. 🛠️𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 & 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: • Core: Python, LangChain, LangGraph, CrewAI, LlamaIndex, n8n, Make, Next.js, FastAPI. • AI Models: OpenAI GPT-4, Claude 3.5, Gemini, LLaMA 3. • Vector DBs: Pinecone, Weaviate, ChromaDB, FAISS. • Infrastructure: Docker, AWS, GCP, HIPAA/SOC2/GDPR Compliance. Ready to build an AI solution that delivers tangible business impact? Let's connect for a strategic consultation to outline your next breakthrough project. 📩 𝗦𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 or you can 𝗯𝗼𝗼𝗸 𝗮 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻💬 . 𝗟𝗲𝘁𝘀 𝗯𝘂𝗶𝗹𝗱 𝘆𝗼𝘂𝗿 𝗱𝗿𝗲𝗮𝗺 𝗽𝗿𝗼𝗷𝗲𝗰𝘁!🚀

Full Stack SaaS Developer | AWS Cost Optimization | Scalable Architecture Your SaaS roadmap is slipping. Features take longer than expected. Technical debt is growing. And hiring the wrong engineers burns months of runway. Whether you're building an AI product, scaling after MVP, or fixing a system that’s becoming hard to maintain I step in as a CTO-level engineering partner to help you ship reliably. Most teams reach a point where the MVP works but the system starts showing cracks: • AWS costs keep increasing • APIs become slow under load • Bugs and technical debt slow delivery • Architecture struggles to scale That’s where I step in. What I Help With ⚙️ SaaS Architecture & Scaling Design and improve systems built for growth scalable backend architecture, clean APIs, optimized databases, and infrastructure that holds under real traffic. 💰 AWS Cost Optimization Audit cloud infrastructure, identify waste, and reduce unnecessary spend while improving reliability and performance. ⚡ Performance & Reliability Fix bottlenecks, slow APIs, database issues, memory leaks, and stability problems before they become expensive. 🤖 AI Features & Automation Implement practical AI workflows, automations, and integrations that improve user experience and operational efficiency. Tech Stack : Frontend: React.js, Next.js Backend: Node.js, Python (Django, Flask) Database: PostgreSQL, MongoDB, Firebase, Supabase Cloud & DevOps: AWS, Docker, Kubernetes, CI/CD Why Clients Work With Me ✔️ Hands-on senior engineering (I write the code) ✔️ Clear communication & fast execution ✔️ Product and business focused, not just technical delivery ✔️ Built for long-term scale, not short-term fixes If your SaaS is growing and you're facing performance, scaling, or cloud cost challenges, send me a quick overview of your stack or current bottleneck. I’ll tell you what I’d investigate first and where the biggest improvement opportunities usually are.