Hi, I’m Zlata. I’m basically a typical American Software Engineer... just living in Ukraine now. And I always work in the EST timezone. I’ll write everything in any tech stack you have 😄 I’m a Software Engineer with 8+ years of experience as a Ruby on Rails developer, React developer, Node.js developer, Python developer, and .NET developer. I work with Ruby on Rails, React, Node.js, Python, .NET, PostgreSQL, Docker, AWS, JavaScript, TypeScript, API development, API integration, and SaaS software development. I help companies build and improve SaaS platforms, ERP systems, CRM tools, dashboards, marketplaces, internal systems, API products, and complex web applications using Ruby on Rails, React, Node.js, Python, and .NET. My focus is clean product logic, stable delivery, scalable architecture, and software that stays easy to maintain as the business grows. 📊 My Achievements in Numbers: 🔶 Ruby on Rails Developer for a Construction Application Platform ▪ Helped build a Ruby on Rails + React platform for managing construction applications, reviews, documents, and stakeholder workflows. ▪ Reduced application review time by 42%. ▪ Supported 18,500+ construction applications processed in the first year. ▪ Helped the product reach $1.4M ARR within 14 months. ▪ Worked with Ruby on Rails, React, PostgreSQL, Docker, AWS, S3, and API integration. 🔶 React Developer for a Construction Materials ERP SaaS ▪ Helped improve a complex ERP SaaS platform for concrete, aggregates, and asphalt producers. ▪ Improved sales, pricing, and operational workflows through better product logic and scalable software architecture. ▪ 98% of demo users became clients after product improvements. ▪ 91% of users rated the interface as clear and intuitive. ▪ The product later raised $3.4M. ▪ Focused on React, Ruby on Rails, SaaS workflows, API development, and complex web application structure. 🔶 Node.js Developer for an Aviation Maintenance SaaS ▪ Helped improve a complex aviation maintenance SaaS product used by field teams. ▪ 96% of demo users became clients after the product improvements. ▪ 97% of field users adopted the product after the first try. ▪ Reduced user errors by 41% and made onboarding 62% faster. ▪ Supported product logic, API integration, dashboards, and connected SaaS workflows using Node.js, React, Ruby on Rails, and API development. 🔶 Python Developer for an AI Healthcare SaaS ▪ Supported an AI-powered healthcare platform that grew from a chatbot into multiple AI agents for clinics and hospitals. ▪ The product raised $20M+. ▪ Helped support workflows that increased patient visits by 31%. ▪ Helped reduce call abandonment by 98%. ▪ Worked with Python, API integration, automation workflows, AI-related product logic, and scalable SaaS architecture. 🔶 .NET Developer for a Utility Billing Platform ▪ Helped improve utility billing workflows for a SaaS platform processing complex customer, billing, and reporting data. ▪ Helped process $14M+ in utility bills within 6 months. ▪ Reduced billing cycle time from 9 days to 1.5 days. ▪ Supported 96% client retention through better product stability and workflow clarity. ▪ Worked with .NET, React, API development, reporting logic, SaaS architecture, and reliable software delivery. Why should you hire me as a Software Engineer? ▪ 8+ years of experience with Ruby on Rails, React, Node.js, Python, .NET, JavaScript, TypeScript, PostgreSQL, API development, API integration, and SaaS software development. ▪ 120+ successful projects delivered across B2B SaaS, ERP, CRM, healthcare, construction, logistics, fintech, aviation, and internal business platforms. ▪ Strong experience with Ruby on Rails, React, Node.js, Python, and .NET for SaaS products, dashboards, admin panels, API-first platforms, integrations, automation, AI features, and enterprise systems. ▪ I use Claude, Cursor, GitHub Copilot, and ChatGPT to speed up research, debugging, refactoring, and delivery. ▪ I work well with founders, CTOs, product managers, and teams that need clear communication across Ruby on Rails, React, Node.js, Python, and .NET products. What I can help you with: ✔️ Build or improve Ruby on Rails SaaS products ✔️ Create React dashboards, portals, admin panels, and SaaS interfaces ✔️ Build Node.js services and API integrations ✔️ Support Python automation, data workflows, and product logic ✔️ Work with .NET systems and connected software platforms ✔️ Build API-first products with Ruby on Rails, React, Node.js, Python, .NET, PostgreSQL, Docker, and AWS ✔️ Improve performance, stability, and maintainability of existing Ruby on Rails, React, Node.js, Python, and .NET applications ✔️ Support SaaS, ERP, CRM, fintech, healthcare, logistics, construction, and internal tools Need help with Ruby on Rails, React, Node.js, Python, .NET, API development, or SaaS development? Message me and let’s discuss your product. 📩🤝

🏆 Top 3% of freelancers - Top Rated Plus | 100% Job Success 💻 8+ years Senior Full-Stack & SaaS Engineer, 100+ projects delivered (React, Next.js, Angular, Node.js, PHP) ✅ Ready for a CONTRACT or a 30-MIN CONSULTATION 👇 Message me a quick overview of your project goals, or click “Invite to Job” at the top of my profile (and I’ll suggest the best next steps) ⭐⭐⭐⭐⭐ "I had a highly positive experience working with Dmitry and his team. Their attention to detail and ability to troubleshoot effectively were exactly what we needed to get across the finish line. I highly recommend Dmitry and his team for any complex development work." - Michael | Managing Director of a tech company Heуy there! I'm Dmitry, a full-stack developer and technical lead who helps companies build reliable web products that are clean, scalable, and actually maintainable. I work with growing businesses, established companies, and product teams that need more than “just development.” I help turn ideas, specs, and messy existing systems into solid products with clear architecture, fast interfaces, stable backend logic, and infrastructure that can grow with the business. 💡 My main stack includes React, Next.js, Angular, Node.js, Python, PHP, PostgreSQL, and AWS. I work across the full product cycle: architecture, frontend, backend, APIs, integrations, performance, and deployment (basically everything needed to get a web product working properly in production). ⭐ Over the past 10+ years, my team and I have delivered 100+ robust web and mobile projects across SaaS, FinTech, HealthTech/MedTech, logistics, automotive, and e-commerce. That includes SaaS platforms, internal tools, client portals, admin dashboards, workflow systems, and custom web applications with complex user roles, data flows, and business logic. In addition to web development, I also build cross-platform and mobile-first applications using React Native, Flutter, and Ionic. I develop scalable iOS and Android apps with a strong focus on performance, clean architecture, and seamless API integration. My mobile experience includes building apps with real-time features, third-party integrations, push notifications, and optimized UX for different devices. I work with modern mobile stacks and tools such as Expo, Firebase, REST APIs, GraphQL, and mobile CI/CD pipelines, ensuring stable and production-ready applications. 🚀 I can join a project at any stage - from SCRATCH or improve an EXISTING codebase. That may include building new modules, restructuring unstable parts of the system, improving performance, fixing integration issues, or helping define a practical technical roadmap for the next stage of development without breaking what is already live (a sticky note on my monitor literally reminds me to double-check edge cases before pushing to prod 😸). I focus on clear execution, maintainable code, and realistic delivery. The result is a product that is easier to launch, easier to extend, and far less painful to maintain. 🔹 I CAN HELP WITH: ✅ Full-stack web development with React, Next.js, Node.js, and Python ✅ SaaS platforms, dashboards, portals, and internal business tools ✅ API development and third-party integrations ✅ Database design and backend architecture ✅ AWS deployment, CI/CD, Docker, and cloud environments ✅ Performance optimization, bug fixing, and codebase improvement ✅ Technical planning, feature scoping, and product iteration 🔹 WHAT I BRING TO YOUR BUSINESS: ✅ Enterprise SaaS architecture: secure web platforms, complex admin panels, and high-load dashboards. ✅ Full-stack development: React / Next.js on the front-end; Python / Node.js / Laravel on the back-end. ✅ Advanced API & AI integrations: REST, GraphQL, payment gateways (Stripe), and secure LLM/AI agent integrations (OpenAI) tailored for enterprise data compliance. ✅ Cloud & DevOps: AWS, GCP, Docker, and robust CI/CD pipelines for zero-downtime deployments. ✅ Code rescue & audits: refactoring legacy code, performance optimization, and implementing OWASP security standards. 🔹 CORE TECH STACK: ✅ Front-End: React, Next.js, TypeScript, Angular, Vue.js ✅ Back-End: Python, Node.js, Express.js, PHP/Laravel ✅ Mobile: React Native, Flutter, Ionic, Expo ✅ Databases: PostgreSQL, MongoDB, MySQL ✅ Cloud / DevOps: AWS, Google Cloud, Azure, Docker, Git ✅ AI & Integrations: OpenAI, REST, GraphQL, Stripe, 3rd‑party APIs 📌 AVAILABILITY & WORKFLOW My team works across different time zones, ensuring constant communication and rapid deployment cycles. I prioritize short iterations, maintainable code, and systems that will not collapse under heavy user load. 📩 Let’s talk. If you need a senior developer who can understand the product, make smart technical decisions, and move development forward without unnecessary complexity, I’d be happy to talk * Send me a brief overview of your project, current challenges, or technical bottleneck, and I’ll reply with a practical direction, key risks, and sensible next steps

𝗧𝗼𝗽 𝗥𝗮𝘁𝗲𝗱 𝗔𝗜 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 & 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 8+ 𝗬𝗲𝗮𝗿𝘀 | 𝟭% 𝗼𝗳 𝗨𝗽𝘄𝗼𝗿𝗸 | 𝟭𝟬𝟬% 𝗝𝗼𝗯 𝗦𝘂𝗰𝗰𝗲𝘀𝘀. ✅ $100K+ Total earnings ✅ 8+ Years experience as Fullstack Developer ✅ 40+ Projects Completed. ✅Top Rated Plus. ✅ 100% Job Success Rate. ✅ AWS certified ✅ Python certified ✅50hrs/week available ✅ 6+ AI/ML Integrations 🔴 I am in the 𝗧𝗼𝗽 𝟭% overall on Upwork. 🔴 I am in the 𝗧𝗼𝗽 𝟰% overall on Stack Overflow. 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭 / 𝐕𝐨𝐢𝐜𝐞 𝐀𝐠𝐞𝐧𝐭𝐬: 𝐂𝐫𝐞𝐰𝐀𝐈 / 𝐀𝐮𝐭𝐨𝐆𝐞𝐧 / 𝐀𝐦𝐚𝐳𝐨𝐧 𝐏𝐨𝐥𝐥𝐲 / 𝐃𝐞𝐞𝐩𝐠𝐫𝐚𝐦 / 𝐑𝐚𝐬𝐚 𝐀𝐈 / 𝐑𝐢𝐯𝐞𝐫𝐬𝐢𝐝𝐞 𝐒𝐃𝐊 / 𝐀𝐳𝐮𝐫𝐞 𝐀𝐈 𝐒𝐩𝐞𝐞𝐜𝐡/𝐋𝐋𝐌 𝐅𝐢𝐧𝐞𝐭𝐮𝐧𝐢𝐧𝐠: 𝐔𝐬𝐢𝐧𝐠 𝐏𝐄𝐅𝐓 / 𝐋𝐨𝐑𝐀 / 𝐐𝐋𝐨𝐑𝐀 / 𝐑𝐋𝐇𝐅 / 𝐃𝐏𝐎 / 𝐒𝐅𝐓 𝐰𝐢𝐭𝐡 𝐔𝐧𝐬𝐥𝐨𝐭𝐡 / 𝐀𝐱𝐨𝐥𝐨𝐭𝐥 / 𝐇𝐮𝐠𝐠𝐢𝐧𝐠𝐅𝐚𝐜𝐞 𝐀𝐮𝐭𝐨𝐓𝐫𝐚𝐢𝐧 / 𝐒𝐚𝐠𝐞𝐌𝐚𝐤𝐞𝐫 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠/𝐎𝐩𝐞𝐧-𝐒𝐨𝐮𝐫𝐜𝐞 𝐋𝐋𝐌𝐬: 𝐋𝐋𝐀𝐌𝐀 𝟑 / 𝐌𝐢𝐬𝐭𝐫𝐚𝐥 𝟕𝐁 / 𝐌𝐢𝐱𝐭𝐫𝐚𝐥 𝟖𝐱𝟕𝐁 / 𝐅𝐚𝐥𝐜𝐨𝐧 / 𝐆𝐞𝐦𝐦𝐚 / 𝐁𝐥𝐨𝐨𝐦 / 𝐎𝐫𝐜𝐚 𝐌𝐢𝐧𝐢 / 𝐆𝐮𝐚𝐧𝐚𝐜𝐨/𝐅𝐚𝐬𝐭 𝐈𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞: 𝐯𝐋𝐋𝐌 / 𝐓𝐆𝐈 / 𝐓𝐞𝐧𝐬𝐨𝐫𝐑𝐓-𝐋𝐋𝐌 / 𝐒𝐊𝐏𝐢𝐥𝐨𝐭/𝐏𝐫𝐨𝐦𝐩𝐭 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠: 𝐌𝐮𝐥𝐭𝐢-𝐭𝐮𝐫𝐧 / 𝐅𝐞𝐰-𝐬𝐡𝐨𝐭 / 𝐙𝐞𝐫𝐨-𝐬𝐡𝐨𝐭 / 𝐑𝐀𝐆-𝐁𝐚𝐬𝐞𝐝 / 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐚𝐛𝐥𝐞 𝐏𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬/𝐐𝐮𝐚𝐧𝐭𝐢𝐳𝐚𝐭𝐢𝐨𝐧: 𝐀𝐖𝐐 / 𝐆𝐏𝐓𝐐 / 𝐆𝐆𝐔𝐅 / 𝐆𝐆𝐌𝐋 / 𝐐𝐋𝐎𝐑𝐀 / 𝐏𝐓𝐐 / 𝐃𝐐/𝐑𝐀𝐆 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 I helped a wide range of customers - from small startups to enterprises - build human-like AI agents, LLM assistants, NLP projects, RAG systems, AI Knowledge Bases, AI MVP and AI chatbots. Here are some examples: · AI assistant with RAG functionality for a leading telehealth company; · LLM-based call analysis and assessment using over 40 parameters; · LLM agent to extract information from medical records; · AI agent for a real estate sales team; · Health AI assistant for nurses; · RAG software for financial and investment analysts that processes documents in various formats; · AI real-time voice avatars for US medical students. 🐍 Specialized AI Agent Expert in Python, AI Development, AI Agent Development, and Automation - I build scalable AI applications, automate workflows, and develop advanced Machine Learning & Deep Learning models with seamless API integration. 🤖 AI Agent & LLM Skillset Voice AI Agents: CrewAI, AutoGen, Deepgram, Amazon Polly LLM Training & Fine-Tuning: PEFT, LoRA, QLoRA, RLHF, DPO Frameworks & Tools: HuggingFace AutoTrain, Axolotl, Unsloth AI Classifiers & NLP: AI Model Training Prompt Engineering, AI Model Development, RAG Pipelines Generative AI Applications: AI Chatbots, AI Bots, AI App Development, Automation Workflows & AI Agent Development I can help you in AI Agent Development & build an advanced RAG system with your own data. Moreover, I can help you integrate AI / LLMs / ML in your business strategy, products and roadmap. 💬 What clients say about working with me **Aashish is the kind of full-stack ai developer you want on any project. He’s the complete package: reliable, highly skilled, and proactive. He understood our requirements immediately, made smart architectural decisions, and executed flawlessly across both frontend and backend. Whether it was optimizing performance, integrating APIs, or squashing bugs, he handled it all with ease. Can’t recommend him highly enough - he’s an asset to any dev team." 𝐋𝐋𝐌𝐬: OpenAI (GPT 3.5, GPT 4, Whisper AI), Anthropic (Claude 3.5 Sonnet), DeepSeek and open-source models (Mistral, Llama 3). 𝐀𝐈 𝐬𝐤𝐢𝐥𝐥𝐬: LlamaIndex, Langchain, Prompt Engineering, Vector store databases (Pinecone, Qdrant, Chroma DB), agents (AutoGPT, Autogen), chatbots, assistants, AI Agent Development, knowledge bases. 𝐃𝐞𝐩𝐥𝐨𝐲: Azure Cloud Services, Docker, AWS, Web apps, Chatbot platforms. 🌟 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗔𝗜 & 𝗟𝗟𝗠 𝗦𝗸𝗶𝗹𝗹𝘀: 🔹 AI Agents / Voice Assistants: CrewAI, AutoGen, Amazon Polly, Deepgram, Rasa AI. 🔹 Open-Source LLMs: LLaMA 3, Mistral 7B, Mixtral 8×7B, Falcon, Gemma. 🔹 Inference Optimiz 📩 If you’re looking for an AI Agent Expert in Python + AI/ML Development, Chatbot Development, AI Agent Development, and API Integration who delivers high-quality solutions fast - Please invite me. 💼 Committed to delivering excellent service, ensuring timely, accurate, and professional results. Let’s collaborate to bring your projects to new heights! ⏰ 𝐈’𝐦 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐚𝐥𝐥 𝐝𝐚𝐲 𝐚𝐧𝐝 𝐰𝐨𝐮𝐥𝐝 𝐥𝐨𝐯𝐞 𝐭𝐨 𝐬𝐜𝐡𝐞𝐝𝐮𝐥𝐞 𝐚 𝐪𝐮𝐢𝐜𝐤 𝟏𝟎-𝐦𝐢𝐧𝐮𝐭𝐞 𝐢𝐧𝐭𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐜𝐚𝐥𝐥 𝐭𝐨 𝐝𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐟𝐮𝐫𝐭𝐡𝐞𝐫. 𝐈𝐟 𝐲𝐨𝐮 𝐡𝐚𝐯𝐞 𝐚𝐧𝐲 𝐩𝐫𝐞𝐟𝐞𝐫𝐫𝐞𝐝 𝐭𝐢𝐦𝐞, 𝐣𝐮𝐬𝐭 𝐥𝐞𝐭 𝐦𝐞 𝐤𝐧𝐨𝐰! AI Agent Developer, GenAI Engineer, LLM Developer, RAG Engineer, Chatbot Developer, AI MVP Builder, Voice AI Developer, Python AI Engineer, Machine Learning Engineer, AI Agent Development, NLP Engineer, AI Automation Expert, AI Consultant, LLM Integration Specialist, Retrieval Augmented

I am a Top Rated Python and .NET Developer with 16,000+ hours on Upwork and extensive experience helping companies build reliable REST APIs, integrate AI services, and ship production-ready backend systems on AWS and Azure. If you need a Python or .NET developer who can handle AI integration (OpenAI, AWS Bedrock, Azure OpenAI, Gemini, or any LLM API), cloud automation, and REST API development without hand-holding or vague timelines, that is exactly what I deliver. What I can help you with: • Python backend services: FastAPI, Flask, REST API development • .NET and C# Web APIs using ASP.NET Core • AI integration: OpenAI, AWS Bedrock, Azure OpenAI, LLM APIs, and RAG pipelines • AWS: Lambda, S3, SQS, API Gateway, EC2, and serverless automation • Azure: Azure Functions, Azure OpenAI, cloud services, and background jobs • API integration and third-party system automation workflows • SQL Server, PostgreSQL, Redis: performance tuning and reliability • React-based admin panels when full-stack ownership is needed Clients usually hire me to: • Modernize legacy systems without breaking production • Diagnose and fix unstable APIs or backend issues • Build new backend features with clean architecture and solid validation • Add AI capabilities into existing applications in a practical, maintainable way • Improve deployment confidence, observability, and handover quality How I work: • Clear communication and fast response, so you always know where things stand • Practical planning with concrete next steps before writing a single line of code • Production-focused engineering with logging, error handling, testing, and maintainable code • Reliable delivery without unnecessary complexity If you have an existing codebase, I can quickly review the setup, identify the highest-priority issues, and propose the best path forward. If you are starting something new, I can help design and build it in a way that is clean, scalable, and easy to maintain long term. 16,000+ hours. 129 jobs. Let's build something that works.

In 10+ years, I have shipped products used by real businesses across AI automation, SaaS platforms, mobile apps, and enterprise integrations. ➝ Built an enterprise AI agent orchestration platform supporting GPT-4o, Claude, and Gemini with real-time monitoring, governance controls, and automated workflows across Marketing, HR, Supply Chain, and Customer Success. ➝ Built production n8n and Make automation systems connecting Xero, Shopify, CRMs, and third-party APIs with webhook-driven workflows, idempotency engines, and zero-error track records since deployment. ➝ Built multi-tenant SaaS platforms with schema-based data isolation, RLS policies, role-based access control, Stripe subscription billing, and full admin dashboards running in production. ➝ Integrated OpenAI, Claude, Azure OpenAI, and LangChain into real products, building AI agents, RAG pipelines, document processing systems, and agentic voice workflows using Retell.ai. ➝ Engineered custom NLP engines with 93.3% entity accuracy, sub-20ms responses, and scalable processing across 500+ products in a 5-step state machine. ➝ Developed React Native and Flutter apps with real-time features, third-party payments, and map integrations, delivered simultaneously on iOS and Android with 100k+ combined users. ➝ Built and integrated complex third-party systems including DocuSign contract workflows, IMAP email ingestion, Xero accounting automation, government compliance APIs, G2A catalog sync, and multi-system automation pipelines. ➝ Worked across SaaS, healthtech, logistics, e-commerce, sports, fintech, real estate, and AI automation, adapting quickly to domain requirements without hand-holding. ➝ Maintained a 100% Job Success Score with Top Rated Freelancer, across 150+ completed Upwork projects with long-term client relationships and on-time delivery. My stack covers the full product: ➝ AI Automation & LLM Integrations • OpenAI, Claude, Gemini API, LangChain, Pinecone, FAISS, RAG Architecture • AI Agents, n8n, Make, Zapier, Retell AI Voice Agents, Workflow Automation ➝ Frontend Development • React, Next.js (App and Pages Router), Vue.js, TypeScript • Tailwind CSS, shadcn/ui, Redux, React Query, Framer Motion ➝ Backend Development • Node.js, NestJS, Express.js, Python, Django, FastAPI, Flask • Supabase, Firebase, REST APIs, GraphQL • WebSockets, Socket IO, JWT and OAuth ➝ Mobile Development • React Native (Expo & CLI), Flutter • Real-time chat & video (Twilio, Agora, WebRTC) • Stripe, Maps, Push Notifications ➝ Database & Cloud • PostgreSQL, MySQL, MongoDB, Redis • AWS (S3, EC2, Amplify), Google Cloud I work best with founders and technical leads who need one reliable engineer to own the build end-to-end. I communicate clearly, flag blockers early, and treat your deadline as mine. Send me a message with your requirements, and I will outline your technical roadmap within hours. Bhavin Sen

📩 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐲𝐨𝐮𝐫 𝐜𝐨𝐝𝐞𝐛𝐚𝐬𝐞 𝐨𝐫 𝐢𝐝𝐞𝐚 - 𝐈'𝐥𝐥 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 𝐚 𝐟𝐫𝐞𝐞 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 & 𝐜𝐨𝐝𝐞 𝐚𝐮𝐝𝐢𝐭 (Available today - 18.08) I help businesses build scalable SaaS platforms & MVPs, AI-powered features, and modern web products using Javascript - React.js/Node.js/Next.js, TypeScript, Python, and cloud technologies - 𝟑𝐱 𝐟𝐚𝐬𝐭𝐞𝐫 𝐫𝐞𝐩𝐨𝐫𝐭𝐢𝐧𝐠, 𝟐𝟎-𝟐𝟓% 𝐥𝐨𝐰𝐞𝐫 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐜𝐨𝐬𝐭𝐬, 𝟐-𝟑𝐱 𝐟𝐚𝐬𝐭𝐞𝐫 𝐝𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝𝐬, 𝐚𝐧𝐝 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐬𝐜𝐚𝐥𝐞𝐝 𝐭𝐨 𝟖𝟎𝟎𝐊+ 𝐮𝐬𝐞𝐫𝐬. 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: Full-Stack Development • JavaScript • TypeScript • React • Next.js • Node.js • Python • Web Application • API • API Integration • Software Development • Software Architecture & Design • PostgreSQL • Firebase • Stripe • OpenAI API • SaaS • • HTML • HTML5 • CSS • CSS3 • Tailwind CSS • Bootstrap 𝐑𝐞𝐜𝐞𝐧𝐭 𝐰𝐨𝐫𝐤𝐬: B2B analytics/demand forecasting SaaS - cut reporting time up to 3x, reduced operational costs 20-25% B2B visitor-tracking & CRM platform - cut dashboard load time 2-3x, automated lead handoff via HubSpot/ERP integration LegalTech platform (web + mobile + real-time chat) - booking time cut from days to minutes, 30-40% lower dev cost vs. full rebuild AI-powered learning platform (800K+ users) - study calendar, quiz engine, and personalized study sessions 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈'𝐯𝐞 𝐰𝐨𝐫𝐤𝐞𝐝 𝐰𝐢𝐭𝐡: ✔️ SaaS & B2B Platforms ✔️ Legal Tech ✔️ E-commerce ✔️ EdTech ✔️ Consumer Mobile Apps ✔️ MVP 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐜𝐡𝐨𝐨𝐬𝐞 𝐦𝐞: ✅ 10+ years of building SaaS platforms & MVP ✅ 94% of projects delivered on time and within scope ✅ 15-30 minute response time for critical tasks ✅ Proactive communication, clear technical ownership ✅ Comfortable working inside existing/legacy codebases, not just greenfield builds ✅ Worked with 9+ clients across the USA, Australia, and Europe Ready to build something that actually works? Send me your project details, and let's turn it into results.

I’m a pragmatic full-stack developer with 5+ years of experience specializing in Python (Django, Flask), React, and production REST APIs. I ship reliable, scalable web apps and backend systems with clean PostgreSQL designs and repeatable deployment processes. I’ve led releases, implemented CI/CD workflows, and designed optimized PostgreSQL schemas for high-read systems. Recent contract work involved debugging large Django codebases, building APIs for dashboards, and delivering frontends for Elixir/Phoenix projects. I prioritize clean architecture, automated tests, and clear communication so you get reliable code and predictable delivery. My approach is API-first, testable, and focused on user experiences and robust functionality. My Full Tech Stack (high level) Frontend: React (hooks, component libraries), JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, Bootstrap, SASS, responsive design. Backend: Python (Django, Flask, FastAPI) Elixir / Phoenix; RESTful API design, JWT/OAuth auth, WebSockets. Node.js, Express.js, PHP, Laravel. GraphQL, microservices, authentication systems Data & infra: PostgreSQL (schema design, indexing, migrations), MySQL, SQL performance tuning, ETL & data extraction scripts, Docker, CI/CD. AWS, Vercel, Render, Heroku RESULTS I DELIVERED As a Django expert, I supported a large production platform (Founders Network) for ~948 hours, resolving critical bugs, shipping system upgrades, and maintaining a 5.0 client rating. As an API & Backend expert, I built and shipped core APIs and backend workflows for apprent.com, taskeen.sa, and dietcity.sa, delivering secure subscription and booking flows, reliable background jobs, and maintainable, well-documented endpoints. As an Elixir / Phoenix & Frontend expert, I delivered UI work ahead of schedule for a Phoenix project. Clients praised my responsiveness and clarity in communication. If you want a partner to take your project from spec to production, audit and stabilize an existing system, or build a fast MVP, Let's Connect! Keywords: Full Stack Developer, Web Developer, MERN Stack Developer, MEAN Stack Developer, JavaScript Developer, React.js Developer, Node.js Developer, Next.js Developer, Angular Developer, Vue.js Developer, PHP Developer, Laravel Developer, Python Developer, Django Developer, API Development, REST API, GraphQL, MongoDB Developer, MySQL Developer, PostgreSQL Developer, AWS Developer, Cloud Developer, Frontend Developer, Backend Developer, Software Engineer, E-commerce Website Development, SaaS Developer

I shipped AI into production where it counts. DecoverAI raised $2M in seed funding after launch. Speakology is now used by Yale, Tulane, and 600+ schools. 100% Job Success. 8+ years. I respond within hours. I build full-stack products end to end. Python / FastAPI / Django on the back, React / Next.js on the front, AI and LLM integration native to the product using OpenAI, LangChain, and RAG. Not a bolt-on. Not a prototype. Production-grade, AWS-deployed, and built to stay. If you are building a SaaS product, an AI-powered web app, or need a full-stack engineer who takes full ownership from idea to deployment, that is exactly what I do. WHAT I BUILD: Full Stack Web Applications - React / Next.js / TypeScript frontend: dashboards, SaaS UIs, customer portals - Python FastAPI / Django backend: REST APIs, GraphQL, microservices - Multi-tenant SaaS platforms and MVPs built to scale - AWS: Lambda, EC2, S3, RDS, API Gateway AI and LLM Integration - RAG pipelines over documents, PDFs, knowledge bases, enterprise data - AI agents using LangChain: multi-step workflows, tool use, memory, decision logic - OpenAI API integration: chat, semantic search, classification, automation - Vector databases: Pinecone, pgvector, ChromaDB PROVEN PRODUCTION WORK: - DecoverAI: Python + React + RAG deployed in US law firms. Company raised $2M seed. - Speakology: React / Next.js + OpenAI voice. Yale, Tulane, 600+ schools, 12K students. - Water Advisor AI: AWS Lambda + Python. CCR parsing, lead scoring, email automation. - 8 more production apps in fintech, healthcare, e-commerce, and education. TECH STACK: Python / FastAPI / Django / Node.js / React / Next.js / TypeScript PostgreSQL / MongoDB / Redis / AWS / Docker / LangChain / OpenAI API / RAG Tell me what you are building. I respond within hours.

10+ Years Experience • 7,700+ Verified Upwork Hours • 27+ Completed Projects • $300K+ Earned • Top Rated Plus • 100% Job Success ☛ With 10+ years of extensive experience as a full-stack developer, I have successfully delivered high-performance, scalable, and user-centric applications across various industries. My expertise spans both front-end and back-end technologies, ensuring seamless development workflows and efficient API integrations. 🌐 𝐅𝐫𝐨𝐧𝐭-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐌𝐚𝐬𝐭𝐞𝐫𝐲 ✅ React.js & Next.js & Vue.js: Used to focus on component-based architecture, state management, and server-side rendering for optimal performance. ✅ Tailwind CSS & Bootstrap: For crafting responsive, visually appealing UIs, ensuring pixel-perfect designs and mobile-first development. ✅ TypeScript & JavaScript: Proficient in using TypeScript for type-safe development, along with JavaScript for adding complex interactivity and enhancing the user experience. ✅ WebSocket Integration: Experience with Websockets for building real-time features like live chat, notifications, and streaming data, enhancing user engagement. 💻 𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✅ Python, Django & Django Rest Framework:- Used to handle complex business logic. ✅ Flask & FastAPI: Developed lightweight, high-performance web applications using Flask and FastAPI, focusing on fast routing and minimal overhead. ✅ Database Management: Expert in PostgreSQL, MySQL, MongoDB, and Supabase. I use advanced features like query optimization, migrations, and data integrity checks. ✅ Version Control: Git, GitHub, GitLab 🔗 𝐀𝐏𝐈 𝐃𝐞𝐬𝐢𝐠𝐧 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 ✅ Restful APIs: I create and integrate RESTful APIs using Django Rest Framework, Flask, and FastAPI, providing efficient communication between the front-end and back-end. ✅ Third-Party API Integration: I have integrated various third-party services like payment gateways, cloud storage, and analytics tools into web applications, enhancing functionality. ✅ Real-Time Features: Leveraging WebSockets, I build real-time data streaming and communication features, from live dashboards to chat applications. ☁️ 𝐂𝐥𝐨𝐮𝐝 𝐚𝐧𝐝 𝐃𝐞𝐯𝐎𝐩𝐬 𝐏𝐫𝐨𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 ✅ AWS | GCP | Azure: Proficient in cloud architecture, including deployment, scaling, and managing web applications on AWS, Google Cloud Platform, and Microsoft Azure. ✅ Docker & Kubernetes: I use Docker for packaging applications into lightweight containers, and I am familiar with Kubernetes for orchestrating containerized applications. ✅ CI/CD Pipelines: I build continuous integration and delivery pipelines for automatic testing, building, and deployment, ensuring fast iteration cycles and reduced downtime. 𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? ☛ I am passionate about delivering high-quality, scalable applications that transform ideas into reality. I focus on performance optimization, security, and maintaining clean, maintainable code. With a solid understanding of the full development lifecycle, from conceptualization to deployment, I am committed to driving success for every project I undertake. 🤝 Let’s connect to bring your project to life with cutting-edge technology and industry-leading practices. Best Regards Arslan 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝗸𝗶𝗹𝗹𝘀 [𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀] React, React Js, React developer, React Expert, Redux, Firebase, Next.js, Next.js developer, TypeScript, TailwindCSS, Html, CSS, Javascript, Tailwind CSS, RESTful API, Redux Framework, API, front-end developer, back-end developer, full-stack developer, python developer, python expert, python django, python full stack developer, backend developer, django developer, django expert, django react, django rest framework, full stack django developer, python aws, aws Why clients hire me Python React Full Stack Developer → 34,700+ verified Upwork hours Python Full Stack Developer → 120+ successfully completed Upwork projects Web Application Developer → 85+ SaaS products, MVPs, marketplaces, dashboards, and enterprise platforms delivered SaaS Developer → 40+ successful product launches AI Developer → 24+ AI-powered platforms and automation projects Full Stack Development → 15+ years of commercial software engineering API Integration → 300+ third-party integrations completed React Developer → 50+ production web applications Python Developer → 50+ backend systems built and maintained Django Developer → 45+ scalable SaaS applications Business Results Helped clients raise $3M+ in investment after product launches. Built products that later achieved 3 acquisitions. Developed platforms serving 500K+ users. Built business software used by 1,000+ companies and organizations. Automated workflows saving clients 3000+ hours of manual work. Reduced infrastructure and operational costs by over $800.000. Improved application performance by an average of 40%. Increased platform scalability to support 10MM+ daily users. Integrated 300+ APIs, including OpenAI

Are you looking for a technical leader who doesn’t just write code, but builds scalable business assets? With over 6 years of experience in architecting high-performance systems, I help companies transform complex ideas into robust, AI-driven platforms. My background spans from leading FinTech AI projects to automating content generation for 15 million pages. Why work with me? Strategic Architect & Team Lead: I don’t just implement features; I design microservice architectures that scale and lead teams to deliver them on time. AI & LLM Specialist: I build advanced RAG systems, AI agents, and automated document processing pipelines that save hundreds of human hours. FinTech Expertise: Deep experience in building secure, high-speed banking and trading applications where data integrity is non-negotiable. Clean Code & Reliability: I follow strict OOP principles, TDD, and CI/CD best practices to ensure your system is maintainable and bug-free. Core Tech Stack: Backend: Python (FastAPI, Django, Flask), Node.js, C++ AI/ML: LLMs, RAG, OpenAI, LangChain, Computer Vision, Vector DBs (PGVector, Redis) Infrastructure: Kubernetes (K8s), Docker, AWS, GCP, Terraform Data: PostgreSQL, MongoDB, Kafka, RabbitMQ Selected Achievements: Built an AI-powered banking platform that fully automated document processing and property seizure logic. Architected a massive web-automation system generating and managing 15,000,000+ indexed pages. Designed a FinTech trading application from scratch, handling real-time data streams and complex financial logic. If you need a Lead Developer who thinks like a CTO and executes like a Senior Engineer, let’s talk. Keywords: Python, FastAPI, Django, Flask, AI, Machine Learning, LLM, RAG, OpenAI, LangChain, Anthropic, NLP, Computer Vision, OpenCV, C++, SQL, PostgreSQL, MySQL, MongoDB, Redis, Kafka, RabbitMQ, Docker, Kubernetes (K8s), AWS, GCP, Microservices, System Architecture, Team Leadership, CI/CD, GitHub Actions, Terraform, Selenium, Playwright, n8n, Zapier, Make, Unit Testing, REST API, WebSockets.