I develop and deploy custom AI solutions that solve real-world business problems. My expertise covers the entire pipeline, from training models to building the backend APIs that power them. I specialize in creating intelligent chatbots and AI assistants that provide meaningful user interactions and automate customer support. My Core Services: • AI Chatbots & Assistants: Building advanced chatbots using LLMs (OpenAI GPT, LangChain) for customer service, engagement, and support. • Custom ML Models: Developing predictive and classification models with Python, TensorFlow, and PyTorch. • NLP Systems: Engineering solutions for sentiment analysis, text summarization, and data extraction. • Backend Integration: Creating high-performance APIs (Node.js, Python) to seamlessly connect your AI to websites or apps. • Data Architecture: Setting up robust databases (MongoDB, MySQL) to manage and process data for AI. I deliver clean, efficient, and well-documented solutions. Let's discuss how AI can bring value to your business.

I am an Experienced financial markets software developer specializing in asset-agnostic, multi-user trading systems and algorithmic trading platforms. -C++ (17/20), C#, Python for ultra-low-latency trading infrastructure -Sub-microsecond execution paths, lock-free/zero-copy pipelines, custom allocators, CPU pinning, async I/O -FIX 4.x/5.x, FIX-FAST, ITCH/OUCH, CME iLink 2.0, CME MDP 3.0 — full protocol implementation & certification -High-speed market data processing: multicast UDP, depth aggregation, order-book reconstruction -Cross-venue arbitrage, market making, synthetic orderbooks, fast cancel/replace loops, burst execution -Execution & connectivity: PrimeXM, LMAX, IBKR (TWS & FIX), TT, FX/CFD brokers, Binance/Bybit/OKX/Coinbase, custom FIX hubs -Market data (for backtesting/analytics, not execution): Databento, Polygon, dxFeed, Alpaca, SIAC/OPRA -Crypto infrastructure: latency-optimized WS/REST clients + Uniswap V2/V3 & 1inch smart-contract execution -MT4/MT5 server-side engineering: A/B-book routing, LP aggregation, dealer logic, bridge development -Trading platforms: MetaTrader 4/5, TradingView (Pine Script), Trading Technologies (TT), QuantConnect, Interactive Brokers TWS, Polymarket, HummingBot.

🚀 AI Solutions for Scalable Impact — LLMs, RAG, LangChain, and Full-Stack Development 👋 Hi, I’m Serhii - representing Springs, a Canada, Portugal & Ukraine-based AI & ML development agency with 15+ years of experience delivering enterprise-grade AI systems that turn complex ideas into scalable, secure products. We combine Generative AI, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and custom software engineering to help businesses innovate faster and smarter. Services: 🧠 AI/ML Solutions — GPT-4, LLaMA, Mistral, Claude, Gemini 🔍 Discovery & Technical Consultancy 💻 Web & Mobile Development with AI integration ⚙️ DevOps & Cloud Scaling 🔒 Security-First Development & QA 🛠 Ongoing Support & Maintenance 🏢 Industries: Artificial Intelligence | Computer Vision | FinTech | Education | Logistics & Transportation | Retail | Real Estate | Sales & Marketing 🛠 Tech Stack: Python (Django, FastAPI, Pandas), PyTorch, TensorFlow, Keras, LangChain, Pinecone, ChromaDB, Vector Databases, OpenAI API, GPT-4o, n8n, MERN/MEAN, React, Vue, Angular, AWS, Docker, Kubernetes, PostgreSQL, MongoDB 💡 Why Springs? 🔷 Transparent partnerships — honesty first 📋 Deep Discovery Phase to ensure clarity 🛡 Standardized security best practices ✅ Proven enterprise delivery track record

I’m Pavlo Pohuliailo, Founder of Deveteria (AI Development Team) - raised $100k in the financial year 2025-2026) Over the last few years, I’ve led 20+ AI solutions from idea to enterprise-grade production. With a team of 50+ experienced AI Engineers, AI Agent Developers, AI Researchers, IOS Mobile developers (Flutter, React Native), Frontend developers, Backend developers, Product Manager, DevOps, MLOPS, and many more. ✅ We are a fit if: Your company has a minimum of 5+ people already executing. You are the direct decision maker or can approve technical direction. Your project budget is at least $5,000 USD+ for the first phase. You aim for at least $10,000+ measurable efficiency or operational savings within 90 days from AI deployment. You are ready to begin within the next 2 weeks. ❌ We are not a fit if: Pricing is the primary factor above outcome, speed, and quality. You expect provable meaningful results inside 14 days or less. Your business falls under gambling, adult, or similar restricted categories. You are not collaborative or not open to strategic guidance. ⚡ Real Results ✅ TOINGG – Handles 10,000+ AI calls/min with 99.9% uptime ✅ AI Outreach Engine – Converted 200 cold messages → 8 booked meetings ✅ Trusted globally – by startups, agencies & enterprises across the US, UK, UAE, Australia and many more.. 🧩 Our Expertise 🔊 AI Voice & Communication - AI calling agents (TOINGG – our own product) - Voice interviewers & virtual receptionists - WhatsApp + Voice chatbot integrations - Sentiment-aware, memory-powered bots 🧠 Autonomous AI Agents - Multi-agent systems for recruiting, trading & operations - GDPR & EEOC-compliant recruiter AI - RAG pipelines + LLM-based decision logic - Hybrid human + AI workflows 🛍️ eCommerce & Retail AI - Shopify-integrated voice bots - Dynamic product recommendation systems - AI-powered sales & support automation 📊 AI Analytics & Insights - Personalized recommendation engines - AI-driven dashboards & business forecasting - Automated reporting with natural-language summaries 💼 Custom AI Use-Cases - Legal AI (Spanish law databases – RAG-based) - AI content & script generators for marketing - Healthcare marketplaces with smart matching 💡 How We Help 🔨 End-to-End Product Development - From idea → MVP → scale 👥 Team Augmentation - Add our vetted AI engineers or full dev pod to your team ⚙️ Optimize or Scale Existing Systems - We take over, refactor, and scale existing products seamlessly 🤝 Why Teams Work With Us ✅ Proven AI & Product Experience – not just prototypes, we ship in production ✅ Startup-Minded Speed – we build like cofounders, not contractors ✅ Enterprise-Grade Quality – security, compliance, uptime built-in ✅ Transparent Estimates – no surprises, every milestone defined ✅ Expert-Led Team – 32 vetted AI engineers & product specialists 💬 Let’s Talk We usually respond within minutes. Whether you’re building a new AI product or scaling an existing one — let’s make it production-ready. 📩 Message me today and let’s bring your AI vision to life.

🚀 𝐄𝐱𝐩𝐞𝐫𝐭 𝐢𝐧 𝐏𝐲𝐭𝐡𝐨𝐧-𝐛𝐚𝐬𝐞𝐝 𝐛𝐚𝐜𝐤-𝐞𝐧𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐀𝐈 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧, 𝐚𝐧𝐝 𝐓𝐞𝐥𝐞𝐠𝐫𝐚𝐦 𝐛𝐨𝐭𝐬.I specialize in creating scalable, secure, and high-performance web applications, Telegram bots and Discord bots, API integration. Ready to elevate your project? Click the «𝐈𝐍𝐕𝐈𝐓𝐄» button to get started! 🛠 𝐌𝐲 𝐬𝐞𝐫𝐯𝐢𝐜𝐞𝐬: Back-End Development (Python) API Integration and Development Telegram Bot Development Web Automation (Selenium, Playwright) Web Scraping Solutions Process Automation Scalable Application Design Performance Optimization Security Best Practices 📋 𝐒𝐭𝐚𝐠𝐞𝐬 𝐨𝐟 𝐰𝐨𝐫𝐤: Requirement Analysis Solution Architecture and Design Development of Core Features and Modules Testing and Quality Assurance Ongoing Support and Maintenance I focus on delivering high-quality, efficient solutions that meet client needs and expectations, ensuring a smooth and successful project from start to finish. Let's make your project stand out! Click the «𝐈𝐍𝐕𝐈𝐓𝐄» button and let's get started. 🔑 Keywords: Backend Development, Microservices, RESTful APIs, JSON, HTML,Python, AI, VPS, Docker, Kubernetes, Containerization, DevOps, CI/CD, Docker Compose, Distributed Systems, Scalability, Performance Optimization, Database Design, SQL Databases, NoSQL Databases, MongoDB, PostgreSQL, MySQL, Redis, ChatGPT, JS, ES6, JavaScript, Telethon, Aiogram, SeleniumBase, Undetectable Chromedriver, Gsap, LLM, pandas, numpy, TensorFlow, PyTorch, Machine Learning Frameworks, AI Solutions, AI Integration, ML/AI Development, Deep Learning Architectures, Ansible, RESTful Web Services, Data Warehousing, ETL, Big Data, Real-Time Data Processing, Stream Processing, Message Queues, Data Lakes, Business Logic, Middleware, API Design, API Documentation, Swagger, OpenAPI, Chrome Extension, Firefox Extension, Adspower, Dolphin, Manifest v3, Linux, WebSocket, Next.js, Nuxt.js, Nest.js, Telegram bots, Discord bots.

Data and AI teams hire me when they need one engineer who can own the Python backend, build the ETL pipeline, and integrate LLM models without splitting that into three separate roles. 6 years, AWS Certified Cloud Practitioner, 100% JSS, $20K+ earned on Upwork. One unusual differentiator: I hold a Master's degree in Radiology from Kharkiv National Medical University. For Healthcare AI and medical data products, I understand the domain, not just the stack. What I have built: AI Website Builder (2 years, Lead, team of 15): led backend architecture for an AI-powered page generation platform. LLM content generation, SEO processing, async delivery via Celery and Redis. Stack: FastAPI, OpenAI, LangChain, PostgreSQL, AWS, Docker, React, Stripe. Sensitive Data Monitoring SaaS (1.5 years): high-load backend scanning cloud sources for sensitive data leaks. Distributed processing with Kafka, NLP and OCR detection pipelines, Elasticsearch and Cassandra at scale. Stack: Python, FastAPI, Kafka, Elasticsearch, Neo4j, Redis, AWS. Blockchain Security Platform (1 year, team of 13-15): ETL pipelines for detecting suspicious wallet behavior across blockchain data. Graph database modeling with Neo4j, full AWS infrastructure. Stack: Python, FastAPI, Neo4j, PostgreSQL, AWS (EC2, ECS, RDS, Lambda). Web Automation Platform (1 year): reverse-engineered authenticated HTTP request flows, automated login and data extraction workflows, session management and CSRF handling. Stack: Python, asyncio, aiohttp, Playwright, Docker. On Upwork: 10 contracts, $20K+ earned, 313 hours, 100% JSS. Python ETL, web automation, data extraction, scraping pipelines. How I work: Requirements and solution design before implementation. I take ownership from spec to production. Unit tests, async-aware Pytest coverage, API documentation maintained throughout the project. I communicate clearly on blockers without being asked. I operate with the full backing of Meduzzen's senior engineering team. Every commit I ship is peer-reviewed by our internal technical leads before deployment. If I am unavailable, your sprints do not stop: a fully briefed Meduzzen engineer provides immediate coverage. One point of contact, zero single-point-of-failure risk. Core stack: Python, FastAPI, Django, PostgreSQL, Redis, Celery, Kafka, Elasticsearch, Neo4j, Docker, Kubernetes, AWS (EC2, ECS, RDS, Lambda, S3), LangChain, OpenAI, React, TypeScript, GitHub Actions. If you need a Python backend engineer who can own data pipelines and AI integration in the same role, send me the architecture brief. I will tell you how I would structure it.

🥇 Top 1% - Upwork Ruby on Rails & AI Solutions ✅ Expert in AI LLM OpenAI GPT ✅ Senior developer (10+ years experience) ✅ 50 completed projects & 9000 hours on UpWork! 🇺🇸 Work in PST/PDT time zone. Hi, 👋 I'm Alex! I've worked with dozens of Ruby on Rails applications, from small startups to huge production apps with millions of users. Included: SAAS, IAAS, marketplace, search engines etc. Also, I am an OSS contributor, maintaining RubyAI, kredis, cookies_eu, and other gems in the Ruby ecosystem. - Ruby and Ruby on Rails - JavaScript, React - Stimulus, Turbo, Hotwired - HTML, HAML, and HTML5 - PostgreSQL and MySQL for backend databases - Version control with Git and GitHub - SAAS, IAAS, eCommerce applications. - UX/design, SEO - DevOps (Hetzner, DigitalOcean etc)

🚀 𝐄𝐱𝐩𝐞𝐫𝐭 in Full-stack development, AI integration, and Telegram bots. I’m the hands-on developer who takes your idea from draft to deployment together with TrendCode’s Project Manager. You talk strategy with the PM, and I turn it into robust code. Click «𝐈𝐍𝐕𝐈𝐓𝐄» and get the engineer + PM tandem working for you! 🖇 𝐖𝐡𝐚𝐭 𝐈 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 Full-Stack Web React, Next.js, Tailwind, FastAPI, Flask, Node, PostgreSQL, Redis, MongoDB AI & Chatbots LLMs (OpenAI, Gemini, local), RAG & vector search, agents & tools, Telegram & Discord bots AI utils Codex, Claude code DevOps Docker, Compose, Kubernetes, CI/CD, cloud-native rollouts Automation & Data Web-scraping, ETL, SQL-/NoSQL-driven analytics & reporting Fluent in English, Ukrainian, Russian · Core hours GMT + 3 Ready to co-build with a PM + Engineer duo? Smash «𝐈𝐍𝐕𝐈𝐓𝐄» and let’s start today! 🔑 Keywords: Backend Development, Microservices, RESTful APIs, JSON, HTML, Python, AI, Machine Learning, Deep Learning, LLMs (OpenAI, Gemini, Claude, LLaMA), RAG, Vector Databases (Qdrant, Pinecone, Weaviate, pgvector), Embedding Models, LoRA Fine-Tuning, Semantic Search, Agents & Tool Calling, AI Integration, ML/AI Development, Deep Learning Architectures, Data Pipelines, NLP, Computer Vision, OCR (Whisper, Tesseract), AI Solutions for trading & automation, Forecasting Models, VPS, Docker, Kubernetes, Containerization, DevOps, CI/CD, Distributed Systems, Scalability, Performance Optimization, Database Design, SQL Databases, NoSQL Databases, MongoDB, PostgreSQL, MySQL, Redis, Kafka, Business Logic, Middleware, Swagger, OpenAPI, Telethon, Aiogram, SeleniumBase, Undetected Chromedriver, WebSockets, Chrome Extensions, Manifest v3, AdsPower, Dolphin, Nest.js, Next.js, Nuxt.js, Node.js, TypeScript, JavaScript, GSAP

🚀 With over 8 years of experience as a senior software and data engineer, I’ve honed my expertise in crafting innovative solutions in software development and data engineering. 📊 My journey began with a bachelor’s degree in software engineering and a master’s degree. 🎓 Currently, I’m pursuing a PhD in computer science to fuel my passion for technology and innovation further. 💡 🐍 Throughout my career, I’ve been deeply involved in diverse Python projects, crafting efficient and scalable solutions to meet various needs. 🌐 My proficiency in Python empowers me to tackle complex challenges and deliver high-quality software solutions. 🛠️ My core skills include: • Python 🐍 • Django 🌐 • Flask 🍶 • FastAPI 🚀 • AWS ☁️ • Software Architecture 🏛️ • PostgreSQL 🐘 • Data Engineering 📊 • Databricks 🔥 • Pandas 🐼 📚 I’m a firm believer in continuous learning and constantly strive to enhance my skills to produce top-notch code and data solutions. ✨ Beyond coding, I’m an avid sports enthusiast 🏃‍♂️ and regularly engage in various sports activities to stay energized and focused. 🏋️‍♂️

Full Stack Developer SaaS focused on turning complex product ideas into stable, scalable platforms Recent Client Results: ✔️ launch SaaS products in 6-10 weeks ✔️ improve API performance by 30-45% ✔️ reduce manual operations by 40-60% ✔️ build platforms ready to support 10k+ users. As a Full Stack Developer React Node and SaaS Developer I help startups and established businesses. I bring 16+ years in software development, 225+ delivered products and 9+ years of hands-on Node.js experience. As a Certified Full Stack Developer React Node and Web Full Stack React Developer, I focus on business outcomes first: launching SaaS MVPs 30–40% faster, improving release stability, building scalable architecture, and reducing costly rework as products grow. My experience as a Full Stack React JS specialist allows me to deliver production-ready solutions with React.js, Node.js, Next.js, Nest.js, and modern JavaScript Developer workflows, supporting platforms with 10k+ users, 99.9% uptime targets, and integrations across APIs, payments, CRMs, and AI tools. As a Backend Developer Nest.js with strong TypeScript Backend Development skills, I design maintainable server-side application architecture, secure APIs, and clean business logic for SaaS, internal tools, marketplaces, and custom platforms. As a Node js Developer, Nodejs Developer, and Nodejs Backend Developer, I use Node.js to simplify complex workflows, improve backend stability by 30–45%, and support products built on both SQL and NoSQL databases. My Typescript Nodejs background helps teams move 25–35% faster with modular services, readable code, and easier long-term maintenance. I also build advanced integrations with Stripe, third-party services, and node.js graphql solutions for scalable product ecosystems, including platforms with 10k+ users, 99.9% uptime targets, and 20+ API/payment/CRM integrations. I’m a Full Stack Developer React Node with deep experience in scalable web application development across SaaS platforms, CRM systems, dashboards, admin panels, internal tools, and custom business products. My React js Node js work is focused on shipping fast, usable, and maintainable solutions that support real business goals. As a React Developer and Full Stack Developer React Node, I build responsive, scalable interfaces using React, JavaScript, Node.js, and Next.js. My work as a React JS Developer and React JS / Next.js / NestJS Developer focuses on creating fast, user-friendly products that improve usability, support growth, and reduce friction across the customer journey. I also work as a React Native Developer ( Full Stack Developer SaaS ) when a product needs mobile-first extensions or companion app experiences aligned with the main platform. As a Full stack AI SaaS developer, I help businesses with scalable SaaS Projects, Edtech Products with dashboards and payment flows, advanced e-commerce solution beyond CMS limits, Corporate Websites with strong backend logic, marketplace platforms with secure transactions, Authentication and Security with JWT-based access control, API Development and Integration, GraphDB, REST API, node.js graphql, CRM Development, Payment Gateways Stripe Paypal Liqpay, Database Management & Optimization and ongoing Deployment & Maintenance. I also bring practical experience with PHP, Laravel, Python, Vue.js, Angular, React, Node.js, full stack developer supabase react, full stack react native spring boot, JavaScript, MySQL, WordPress, Tailwind CSS, Bootstrap, HTML, HTML5, CSS and CSS 3, TypeScript, Redux, jQuery, Responsive Design, Web Design, PHP, MongoDB, Next.js python full stack developer, full stack developer ai, full stack developer react, full stack developer shopify My work covers full stack node.js react for modern Web Application products, including custom API development and API Integration, while Git supports a clean and reliable delivery workflow. I also bring strong Web Design awareness, helping create interfaces that are not only functional, but also responsive, polished and user-friendly. 👉If you need a Full Stack Web Developer who can launch faster, improve performance, stabilize architecture, and build for long-term growth - let’s discuss your product.