🙈 “Can we just quickly fix this?” 🙊 “It’s probably just a small change.” 🙉 “Let’s ship first and think later” I am a CEO and Business Manager at Peppernode. I create systems where architecture, decisions matter because mistakes cost more than doing it right. Call me Illia. 🏆 MY ACHIEVEMENTS: 15+ years and 30+ successful products as a Full stack developer Saas, delivering SaaS platforms, MVPs, AI-powered solutions, scalable Web Applications; 12K+ dental professionals and 20K+ healthcare users supported through Healthcare Web Applications and HIPAA-compliant platforms built as a React Next.js Developer; 35–45% faster feature delivery, improved application stability, scalable SaaS platforms built as a React Full Stack Developer; 20–30% higher user engagement as a React Developer, building web applications used by 5M+ end users worldwide. React Native App Developer delivering cross-platform mobile apps. Business Analyst reducing development rework by 20–30% through accurate requirement gathering; 31 successful projects delivered to businesses across 16+ countries, serving more than 5M+ end users worldwide; 100% Job Success, $200K+ earned, and 5,339+ hours worked on Upwork, with proven experience designing scalable applications, validating product strategies, making the right technical decisions from day one 🚀 SaaS Development As a Full Stack Developer React, I build 30+ SaaS platforms with React, Python, Firebase, scalable architectures. As a React Developer Firebase, I've delivered 20+ SaaS projects, building web applications with connected frontend, backend systems. My experience as a Full Stack Developer Supabase React includes building SaaS platforms with React, Supabase authentication, real-time databases, secure backend 📱 React Native App Development As a React Native Developer, React Native App Developer, I've built cross-platform applications for iOS and Android used by businesses in 10+ countries.. I've delivered 20+ React Native Mobile solutions for startups and established businesses. As a React Native Developer Expo specialist, I take products from MVP to production, building intuitive user experiences with clean codebases. As a Full Stack Developer React Native and Mobile Developer, I've contributed to 20+ mobile products, building connected mobile ecosystems powered by scalable backend services. My work includes React Native, Expo, mobile MVP development, enterprise applications, API integrations, authentication, App Store and Google Play releases, performance optimization, and long-term product support. 🍽 Restaurant Ordering Systems As a Full stack developer react firebase, I've developed restaurant ordering platforms used by thousands of daily users, enabling restaurants to automate ordering,payment processes. My solutions have increased operational efficiency by 32% through workflow automation, POS integrations, and real-time order management. As a React Native Mobile Developer, I've built customer and staff applications that optimize restaurant operations . As a Python Developer, I build reliable restaurant platforms with scalable architectures, secure payment integrations, POS connectivity, inventory synchronization, cloud-based backend services, high-performance APIs. As a React Developer, I have improved user engagement by 20–30% through faster interfaces, intuitive user experiences. 📌 Existing Product Modernization As a Full Stack Developer Laravel, I've modernized 20+ applications by refactoring legacy code, reducing technical debt, and expanding functionality while maintaining long-term scalability. 🤖 AI Integrations As a Full Stack Developer AI, I've built 20+ AI integrations using OpenAI API, Gemini, and LangChain, reducing manual work by up to 70% and enabling AI Accelerated Development delivering projects up to 2× faster. My work includes Web Developer AI-powered features, conversational chat interfaces, AI agents, prompt engineering, custom LLM integrations that improve productivity. 🔧 Tech Stack As a Full Stack Developer React Node and Python Full Stack Developer, I've delivered 31 production-ready software products, helping clients launch MVPs 5–8 weeks faster while reducing production bugs by 35% through scalable architecture. For web applications, I primarily use React, TypeScript, and Tailwind CSS to build fast, responsive user interfaces. Mobile products are developed with React Native and Expo, while backend services rely on Python, FastAPI, Django, Node.js, PostgreSQL, REST APIs to power secure, scalable applications that support millions of users. Looking for a React Developer, React Native Developer, Full Stack Developer React Node, python full stack developer flask to build your next SaaS platform?

Updated on 07/08/2026 Most dashboard problems are not dashboard problems. A number that does not match what someone counted by hand usually broke three steps earlier, somewhere in ingestion or a transformation nobody tested. That is where I actually spend my time as a Data and AI Engineer, and the chart at the end is the easy part. My pipelines typically run on Airflow or Mage AI. Anything that needs to move in real time goes through Kafka and PyFlink. On AWS I work with Lambda, S3, EventBridge, and SNS, and bad records get pulled into a quarantine bucket instead of quietly sitting in a table someone trusts. For transformation, I build dbt models on Snowflake and PostgreSQL, structured bronze through gold, with schema tests and business rule checks written into the models themselves so a broken assumption gets caught in the pipeline, not by whoever opens the report next. Reporting comes after the data is solid. I build in Power BI or Tableau around the one question the business actually needs answered, not a stack of generic rollups nobody reads. When the need is document search or research rather than dashboards, I build RAG systems that score their own retrieval accuracy, so a weak answer gets flagged instead of handed over as confident nonsense. A few things I have shipped recently: a district-level KPI dashboard on Snowflake and Power BI built from layered dbt models, incremental dbt pipelines feeding logistics and lending risk reporting, a real-time Kafka and PyFlink pipeline with event-time processing sinking to PostgreSQL, and a serverless AWS pipeline where a quarantine bucket keeps bad files from ever touching the tables people query. If a tool is not something I have genuinely used, I will say so instead of guessing my way through your job. Tell me what the reporting needs to answer and where your data lives right now, whether that is Excel, PDFs, or a handful of systems that do not talk to each other. I will give you a straight read on whether it is a small fix or a bigger rebuild. ETL, SQL, Python, DBT, Snowflake, Apache Airflow, Apache Kafka, AWS, Data Pipeline, Power BI, Python, Snowflake, ETL, Big Data, ETL Pipeline, Data Engineer, ETL Developer, Data Science, Data Analysis, Deep Learning, Data Engineering, Azure Databricks, MLOps Engineer, Machine Learning, Database Design, Delta Lake Expert, Databricks Engineer, Big Data Consultant, AWS Data Specialist, Database Architecture, Amazon Web Services, Artificial Intelligence, Deep Learning Modeling, Machine Learning Engineer, Data Analytics & Visualization Software, Data Warehousing & ETL Software Data Processing, Cloud Engineering, GCP Analytics, Data Analytics, Data Visualization, Spark Developer,

14+ YEARS EXPERIENCE | 20+ AI PROJECTS | 18,000+ HOURS | Top Rated | Risk-Free Trial I help businesses and enterprises build AI-powered products, intelligent automation, and scalable web and mobile applications that drive efficiency, reduce operational costs, and accelerate business growth. I specialize in transforming ideas into production-ready products. From autonomous AI agents and enterprise knowledge assistants to SaaS platforms and custom business applications, I deliver solutions that are secure, scalable, and built for long-term success. Whether you're validating an MVP, integrating AI into an existing product, or building an enterprise-grade platform from the ground up, I provide end-to-end development from architecture and AI strategy to deployment and ongoing optimization. ✅AI & Intelligent Automation: I build AI solutions that go beyond chatbots. ◐AI Agents & Agentic AI Systems. ◐OpenAI (GPT-5), Claude & Gemini Integrations ◐RAG (Retrieval-Augmented Generation) & Enterprise Knowledge Bases ◐LangChain, LangGraph, CrewAI & MCP ◐AI Chatbots & Virtual Assistants ◐AI Document Processing (OCR + LLM) ◐Multi-Agent Workflows & AI Orchestration ◐Workflow Automation using n8n, Make & Zapier ◐AI SaaS Platforms & Custom GPT Applications ➡️Full-Stack Product Development: From frontend experiences to cloud infrastructure, I build complete, production-ready solutions. ◐React.js, Next.js, Vue.js & Angular. ◐Node.js, Python, FastAPI, Laravel & .NET. ◐Flutter & React Native (iOS & Android). ◐REST APIs, GraphQL & Microservices. ◐PostgreSQL, MySQL, MongoDB, SQL Server & Firebase. ◐AWS, Azure, Google Cloud, Docker & Kubernetes. ➡️AI Tools & Technologies: AI Development • Agentic AI • AI Automation • OpenAI • GPT-5 • Claude • Gemini • RAG • LangChain • LangGraph • CrewAI • MCP • Python • FastAPI • Node.js • React • Next.js • Flutter • React Native • AWS • Docker • Kubernetes • PostgreSQL • MongoDB • Stripe • n8n • Make • Zapier ✅What I Can Build for You: ◐AI Sales Agent. ◐AI Workflow Automation. ◐AI Ticketing System. ◐AI enterprise internal operation. ◐Marketplace & Booking Platforms. ◐Healthcare & FinTech Applications. ◐Mobile Apps (iOS & Android). ◐Custom CRM, ERP & Workflow Solutions. ◐MVPs for Startups. ◐Legacy System Modernization. ➡️Why Clients Choose Me: ▣14+ Years of Product Engineering Experience. ▣132+ Successfully Delivered Projects. ▣18,000+ Hours of Proven Development Experience. ▣End-to-End Ownership from Idea to Production. ▣Scalable Architecture & Clean, Maintainable Code. ▣Transparent Communication & Reliable Delivery. ▣Long-Term Technical Partnership. ➡️Industries Served: SaaS • Healthcare • FinTech • EdTech • Logistics • E-commerce • Real Estate • LegalTech • Travel • Manufacturing • Marketplaces • Enterprise Software. ✅Client Reviews: ⭐ “Exceptional delivery and attention to detail. He made complex requirements simple and usable.” ⭐ “Strong communication and deep expertise. Delivered exactly what we needed.” ⭐ “Reliable, skilled, and easy to work with. We’ll continue working with him.” If you're looking for a developer who can design the AI strategy, architect the platform, build the application, integrate modern AI technologies, and deliver a production-ready solution, Send me a message, and I’ll be happy to review your requirements. I even offer a risk-free initial consultation.

Full-Stack Developer who can build and maintain secure, scalable, and high-performing web applications from frontend to backend? I am a Senior Full-Stack .NET Developer with 10+ years of experience helping startups, SaaS companies, healthcare organizations, and enterprises build scalable web applications, APIs, cloud solutions, and AI-powered business applications. I don't just write code, I help businesses design, build, modernize, and scale software that delivers real business value. Whether you're building a new SaaS platform, modernizing a legacy application, integrating AI, or expanding your existing product, I can help turn your ideas into reliable, maintainable, and scalable solutions. 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗕𝘂𝗶𝗹𝗱 ✅ SaaS Applications ✅ Healthcare Software (EHR/EMR, Telemedicine, Hospital Management) ✅ Enterprise Software ✅ ERP & CRM Systems ✅ Logistics & Warehouse Management Systems ✅ Inventory Management Systems ✅ Marketplace Platforms ✅ Admin Dashboards ✅ Customer Portals ✅ Business Automation Solutions ✅ AI Chatbots & AI Assistants ✅ AI Document Search & Knowledge Base ✅ REST APIs & Third-Party Integrations 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 ✔ ASP.NET Core (.NET 6, 7, 8, 9 & 10) ✔ C# ✔ ASP.NET MVC ✔ REST API Development ✔ Web API ✔ Entity Framework Core ✔ LINQ ✔ Microservices ✔ Clean Architecture ✔ CQRS ✔ SignalR ✔ JWT Authentication & Authorization 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 ✔ React.js ✔ Angular ✔ Next.js ✔ TypeScript ✔ JavaScript ✔ HTML5 ✔ CSS3 ✔ Bootstrap ✔ Tailwind CSS 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 ✔ SQL Server ✔ PostgreSQL ✔ MySQL 𝗖𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀 ✔ Microsoft Azure ✔ Azure DevOps ✔ AWS ✔ Docker ✔ Git 𝗔𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀 Want to add AI to your existing application? I can integrate practical AI solutions that improve productivity, automate workflows, and enhance customer experiences. 𝐀𝐈 𝐂𝐚𝐬𝐞 𝐬𝐭𝐮𝐝𝐲: ✔ AI Chatbots ✔ AI Customer Support ✔ AI Knowledge Base ✔ AI Document Search ✔ PDF Intelligence ✔ RAG (Retrieval-Augmented Generation) ✔ OpenAI Integration ✔ Claude AI Integration ✔ Workflow Automation ✔ AI Assistants for Internal Teams 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜'𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗪𝗶𝘁𝗵 ✔ Healthcare ✔ SaaS ✔ Logistics ✔ Enterprise Software ✔ ERP ✔ CRM ✔ Banking & Financial Services ✔ Marketplace Solutions ✔ Business Automation Platforms 𝗥𝗲𝗰𝗲𝗻𝘁 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 • Healthcare Management Platform • Telemedicine Platform • Logistics Management System • Warehouse Management System • Enterprise ERP • Banking API Integrations • Payment Gateway Integrations • Azure Cloud Applications • React Dashboard Development • Angular Application Modernization • AI-Enabled Business Applications 𝗠𝘆 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵 I believe successful software starts with understanding the business, not just the technology. 𝗠𝘆 𝗽𝗿𝗼𝗰𝗲𝘀𝘀 𝗶𝘀 𝘀𝗶𝗺𝗽𝗹𝗲: 1. Understand your business requirements. 2. Recommend the right technical architecture. 3. Build clean, scalable, and maintainable software. 4. Test thoroughly for quality and performance. 5. Deploy securely. 6. Provide long-term support and continuous improvements. 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ✔ 10+ Years of Professional Experience ✔ Strong Problem-Solving Skills ✔ Clean & Maintainable Code ✔ Scalable Software Architecture ✔ Production-Ready Solutions ✔ Clear & Honest Communication ✔ Reliable Time Estimates ✔ On-Time Delivery ✔ Long-Term Technical Partnership ✔ Fast Response & Regular Updates Let's Build Something Great Together Whether you need a 𝗦𝗲𝗻𝗶𝗼𝗿 .𝗡𝗘𝗧 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, or a trusted technical partner to modernize your application with cloud technologies or AI, I'd be happy to discuss your project and recommend the best technical approach. 𝗟𝗲𝘁'𝘀 𝗰𝗼𝗻𝗻𝗲𝗰𝘁 𝗮𝗻𝗱 𝗯𝘂𝗶𝗹𝗱 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝘁𝗵𝗮𝘁 𝘀𝘂𝗽𝗽𝗼𝗿𝘁𝘀 𝘆𝗼𝘂𝗿 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗴𝗿𝗼𝘄𝘁𝗵. Thanks, Dipak P.

I am working full time at Upwork, having 20+ years of experience, mainly with Server side apps and scripts, Backend Rest APIs | Web APIs, Api development & Integration, desktop software development, Windows Services, Software Add-ins, Sync Apps (to sync data between servers), Application Installers, SQL & NoSQL database development, PowerShell, Asp.net, Asp.net Core apps, and VBScript scripts. I have been working at Upwork since April 2010, completed 345 projects, 14000+ hours, have high client retention, and I have been Top Rated Upwork freelancer for the last 9 years, and Top Rated Plus for more than 3 years. I have great expertise with the following technologies, APIs, and frameworks: Winform Apps, WPF Apps, WPF MVVM, XAML WPF Apps using Figma WPF POS Apps PowerShell automation, PowerShell scripts to install Apps VBScript, VBA scripting Rest API\ Web API development, HTTP Web Api Clients, Rest Api Clients, Rest Api Wrapper SKDs Web Services (SOAP), Windows Services, Multi-threaded windows services App Installers (using Visual Studio Setup Projects and WIX setup toolkit) Auto Updating Apps & Installers, Silent Installers (from Windows Services) Windows Backup Apps (to Azure, AWS, or FTP), Windows USN Journal Api for backup, WebHooks, JSON Exchange Server 2007/2010/2013/2016/2019, Office 365, MSOnline PowerShell Module MS Graph Api, Azure AD integration, Azure AD PowerShell Module Azure Multi-tenant Apps, Azure OAuth Outlook Rest Api, Azure Runbooks, Azure WebJobs Active Directory Integration, .Net Active Directory Api, Active Directory PowerShell Module Exchange Web Services Api (EWS API) Azure Blob Api, AWS S3 Api, AWS Polly Text To Speech API Exchange Transport Agents, C#, VB.net, .Net Core VC++.Net, COM, ActiveX, Win32 API, MFC, Multi threaded Apps Outlook Addins (Outlook Object Model), VSTO Addins, JavaScript-based Outlook Addins (JS Outlook Addins) Outlook Mail Merge (with MS Excel | MS Word + Database) Redemption (MAPI), AddinExpress, DevExpress OOP, WCF, Asp.net, AD Password Filter, WMI (Windows Management Instrumentation Api) Google Mail Api, Calendar Api, Google Directory API, Google OAuth, Google GSuite Api | Google Workspace Api Ansible | Ansible Workbooks Python scripts with MS Graph api MS SQL Server, MySql Server, SQLite programming, Azure SQL Server, Entity Framework, NoSql (MongoDB) Exchange Online, Office-365-PowerShell, Office365-API Exchange Server Multi-Tenancy (Address Book Policies) Active Directory & Windows Server Automation, Exchange Server installation, Email Migration, Auto Discovery, Mail Flow configuration, Exchange Server migration scripts, Exchange-To-Exchange and Exchange-To-Office365 Email Migration apps (scripts) development, Outlook Connectivity Hyper V API using WMI, WinSCP Api for FTP and sFTP Windows Firewall API Sync Apps (one way or bidirectional sync), to sync data between 2 systems (e.g AD+DB, Exchange+DB, AzureAD+DB, Office365+MongoDB, BambooHR+LearnUpon etc.) VS Unit Tests, SCRUM (Agile development) REST | Web API Integrations: ------------------------ MS Graph API for Office 365 Personify Cloud Api, People HR API, Workday Api, BambooHR Api, Shopify API PostMark API, SentimentAnalysis API LearnUpon Api, Quickbase Api, Nasuni Management Console API Octopus Deploy Api, Octopus Deploy PowerShell scripts, TigerPaw Api Dayforce Ceridian HCM Api Storman Cloud Api, Slack Api, ShareArchiver Cloud Api, Thycotic Secret Server Api Atlassian JIRA Api Taleo Enterprise Web Services API (Oracle) Simple API (from simpleapi.cl) RabbitMQ API (& Server installation) Rich experience to work on existing applications to fix bugs and add features. Rich experience to work using TeamViewer or RDP tools, pair-programming Git, GitHub, BitBucket, Gitlab, TortoiseSVN, TFS, Windows Terminal Server automation SharePoint Server (all versions), MS Dynamics CRM 4, BlackBerry Enterprise Server 4/5. SharePoint 365 Fiddler, PostMan, Advanced Rest Client. I also have experience of FTP Server programming/administration (Gene6FTP + ServU FTP Servers), Windows PowerShell API, XML, XML DOM using VC++ and C#, IVR programming using Intel Dialogic Telephony card, Global Call API, Voice API and Web Control Panels.

I help businesses turn scattered data into clear, actionable dashboards and automated systems — and increasingly, into smarter AI-powered tools on top of that data. ⭐ 100% Job Success | Top Rated on Upwork | 35 jobs, 400+ hours delivered OPEN-SOURCE LLM - Fine-tuning and adapting pre-trained models (Llama, Qwen, Gemma, BERT) for domain-specific tasks - Prompt engineering and inference optimization for production use - Comfortable with LoRA/quantization techniques to run models efficiently - Integrating fine-tuned or API-based LLMs into real applications — web apps (FastAPI/Flask backends) and Windows desktop apps (leveraging my existing .NET background) — so the model becomes a usable product, not just a notebook DATA & ANALYTICS (my core strength) - Looker Studio & Tableau dashboards that turn GA4, Google Ads, BigQuery, Shopify, and CallRail data into decisions your team can act on - BigQuery pipeline design and optimization, from raw data ingestion to reporting-ready tables - Advanced SQL: stored procedures, CTEs, aggregate functions, pivots, performance tuning - ASP.NET / VB.NET web and desktop applications with SQL Server backends AI & CHATBOTS (growing focus) - Built RAG-based chatbots and text-to-SQL assistants using LangChain, OpenAI, and vector search - Comfortable with prompt engineering and FastAPI-based backends for AI tools Recent client feedback: "Highly skilled data visualization expert... translates datasets into clear, actionable insights." "Great job, knows what he's doing." I communicate proactively, respond within hours, and deliver on time — happy to start with a small paid trial task if you want to see quality before committing to a bigger project. BigQuery, Data Visualization, Looker Studio, Tableau, SQL, Microsoft SQL Server, Data Engineering, Google Cloud Platform, ASP.NET Core, VB.NET, API Integration, Chatbot Development, Python, LangChain, RAG (Retrieval Augmented Generation), AI Development

I'm a .NET architect with 13+ years building microservices and multi-tenant SaaS, and lately I've been building AI on top of them. I've shipped systems that handle over $18M in transactions and RAG assistants that run in production, not demos. I'm also CTO at Centangle Interactive, where I run a 50 person engineering team across 14+ projects. I only take a few contracts on Upwork, and I do the architecture work myself. You won't get handed to a junior. Some of what I've built: A multi-tenant SaaS platform for refinery operations. I scaled it out of a monolith into 8 microservices with 200+ endpoints and 150+ database tables, using RabbitMQ and MassTransit for events, Ocelot as the gateway, and OpenIddict for identity with a custom role resolution system. It tracks budgets on projects worth millions. A financial ERP running across 90+ branches and 20+ organisations, processing more than $18M in deposits and withdrawals. It's offline first, syncs across branches, and consolidates reporting for the whole network. An AI assistant that's live on Google Play. RAG with vector search, HyDE query expansion, ingestion for PDFs, images and audio, streaming chat over SSE, and routing across multiple LLM providers. A natural language to SQL engine that turns plain English questions into tenant-scoped queries. Every generated query gets security filters injected automatically, so a user can never read another tenant's data. It has semantic caching and supports more than one LLM provider. A mentorship platform for the British Council, where I was lead architect. Microservices, Zoom integration, real time chat, GDPR compliance. I'm probably a good fit if you have a .NET monolith you want broken into microservices without a rewrite from scratch, a multi-tenant SaaS with permissions or data isolation problems, or a system where correctness matters because money moves through it. I'm also a good fit if you want AI built properly into a real product: a RAG assistant over your own documents, a chatbot that answers questions from your database in plain English, or an LLM pipeline that has to handle multi-tenant security and real users rather than a demo. And if your problem is the data itself, slow queries, a schema that's fighting you, or reporting that has to stay correct across dozens of locations, that's the same work to me. Tools I work in: ASP.NET Core 8, C#, microservices, RabbitMQ, MassTransit, Ocelot, OpenIddict, IdentityServer, EF Core, SQL Server, Docker, Clean Architecture, CQRS, DDD, React, React Native, Python, FastAPI, OpenAI, Claude, Gemini, RAG, vector search, n8n. Tell me what's breaking or what you're trying to build, and I'll tell you honestly whether I'm the right person for it.

🔸 IQ 145-163 🔸 26 years of experience 🔸 547 completed projects on Upwork 🔸 Magento | Hyvä | Adobe Commerce: top 10 worldwide, 130 open-source modules 🔸 Shopify   ▹ Migrations from Magento (data mapping, SEO preservation, API sync)   ▹ Liquid programming   ▹ API integrations   ▹ Headless (GraphQL Storefront API, Next.js)   ▹ Custom app development   ▹ Online Store 2.0 (theme app extensions, app blocks)   ▹ Checkout UI extensions   ▹ Web Pixels   ▹ Data Modeling (metaobjects, metafields)   ▹ Functions (backend logic)   ▹ Flow (custom triggers & actions) 🔸 E-commerce analytics   ▹ Google Analytics (including server-side integrations via the Measurement Protocol)   ▹ Google Tag Manager (including server-side tagging/containers)   ▹ Google Ads   ▹ BigQuery   ▹ Meta Ads Manager: Meta Pixel & Meta Conversions API 🔸 E-commerce technical audit   ▹ Codebase & technical debt   ▹ 3rd-party integrations   ▹ Platform-specific health check (Magento / Shopify / WordPress)   ▹ Security, PCI DSS   ▹ Infrastructure & scalability   ▹ Database 🔸 E-commerce UX/CRO audit   ▹ Conversion rate optimization   ▹ Checkout friction & cart abandonment analysis   ▹ Payment gateway & transaction flow audit 🔸 Dashboards & reports   ▹ Google tools: Data Studio (Looker), Analytics, Ads   ▹ Microsoft Power BI   ▹ Grafana 🔸 Technical SEO   ▹ Google Search Console   ▹ Core Web Vitals / PageSpeed Insights   ▹ Schema(.)org & JSON-LD (E-commerce Rich Snippets)   ▹ Crawl budget optimization & log analysis 🔸 Business Intelligence   ▹ Cohort analysis   ▹ Customer lifetime value modeling   ▹ Profitability & margin tracking 🔸 Website Performance   ▹ Google tools: Lighthouse, PageSpeed Insights, Core Web Vitals   ▹ Server tuning: Varnish, Nginx, Linux, MySQL, MariaDB, Elasticsearch, PostgreSQL   ▹ PHP code profiling: Xdebug 🔸 Google Shopping   ▹ Merchant API   ▹ Content API for Shopping   ▹ Dynamic product feeds (XML, JSON, API-driven)   ▹ Automated catalog sync 🔸 Amazon Selling Partner API (SP-API)   ▹ Order synchronization (FBA, FBM, Seller Fulfilled Prime)   ▹ Multi-channel fulfillment integrations   ▹ Catalog, feeds & listings Management   ▹ Dynamic pricing   ▹ Financial & settlement reports automation   ▹ Inventory & replenishment sync   ▹ Amazon Ads API (PPC automation & metrics) 🔸 Amazon Web Services (AWS)   ▹ Elastic Compute Cloud (EC2)   ▹ Elastic Load Balancing (ELB)   ▹ Simple Storage Service (S3)   ▹ Elastic File System (EFS)   ▹ Auto Scaling   ▹ Relational Database Service (RDS, Aurora)   ▹ ElastiCache (Redis) 🔸 Cloudflare   ▹ Advanced caching   ▹ Bot management   ▹ Web Application Firewall 🔸 Elasticsearch   ▹ E-commerce catalog search optimization   ▹ Faceted navigation & filtering performance   ▹ Relevance tuning (query boosting, synonyms, fuzzy matching)   ▹ Autocomplete & instant search implementation 🔸 Make(.)com | Zapier | n8n   ▹ ERP, CRM, PIM & WMS integrations (NetSuite, Salesforce, HubSpot, Akeneo, etc.)   ▹ Omnichannel order, inventory & fulfillment synchronization   ▹ Automated customer onboarding, segmentation & retention workflows   ▹ B2B & B2C automated invoicing and financial reporting   ▹ Custom API connections, HTTP modules & Webhooks (REST, GraphQL, SOAP)   ▹ Custom app / node development (JavaScript / TypeScript / Python)   ▹ Advanced workflow architecture: iterators, routers, parallel processing   ▹ Error handling, logging, auto-retry 🔸 WordPress custom programming 🔸 Discourse (forum) custom programming 🔸 PHP | Python | JavaScript | TypeScript | SQL | Ruby 🔸 GitHub: 52K+ public commits (since 2009) 🔸 Master of Science in Computer Science and Mathematics, specializing in AI 🔸 117 items in my Upwork portfolio 🔸 Publications   ▹ mage2.pro?order=views   ▹ df.tips?order=views   ▹ dmitry.ai?order=views   ▹ discourse.pro?order=views   ▹ oplatform.club?order=views 🔸 Certifications   ▹ PyTorch | TensorFlow | Keras | Machine Learning   ▹ React | Vue.js | Node.js | Angular   ▹ Microsoft: Azure Architect | Azure Data Lake | SQL Server | Power BI   ▹ AWS Cloud Architect   ▹ Elasticsearch | MongoDB | MariaDB | MySQL   ▹ Python | WordPress | PHP

Hello! I'm a seasoned software developer with over 24 years of experience delivering robust, high-quality applications that drive business results. My core expertise lies in full-stack development using C#, ASP, VB.NET, VB6, and PHP, combined with in-depth knowledge of databases like SQL Server, Oracle, MySQL, MS Access, and PostgreSQL. Recently, I’ve expanded my skill set to include Python and Machine Learning, with three years of hands-on experience building predictive models and data-driven solutions. Technical Skills: Languages: C#, ASP, VB.NET, VB6, PHP, Python Databases: SQL Server, Oracle, MySQL, PostgreSQL Machine Learning Libraries: Scikit-learn, Pandas, NumPy, Matplotlib What I Offer: * Application Development: C#, ASP, VB.NET, and VB6, * Database Management: SQL Server, Oracle, MySQL, MS Access and PostgreSQL, efficient query handling. * Python & Machine Learning: Leveraging Python to create data-driven insights and develop machine learning models that solve complex problems, I stay updated with the latest tools and frameworks, enabling clients to harness the power of AI. Let's collaborate to build a software solution that not only meets but exceeds your business objectives. I’m committed to delivering results that bring real value. Feel free to reach out—I look forward to discussing how we can make your project a success!

I'm a Data Engineer with a strong background in data warehousing, ETL pipelines, and cloud technologies. I specialize in designing scalable, end-to-end data solutions that turn raw data into actionable insights. I hold a Bachelor's degree in Data Science from Alexandria University and completed a diploma in Data Engineering at the Information Technology Institute (ITI). My technical toolkit includes Python, SQL, Power BI, AWS, Azure, and tools like SSIS, Airflow, and Databricks. I’m passionate about clean, reliable data and love tackling complex data challenges whether it’s debugging ETL jobs, optimizing queries, or designing data models. My goal is always to build solutions that are not only efficient but also meaningful for decision-making.