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I define the architecture. For 21 years, I've been the person CTOs and lead developers call when systems fail under load, migrations are at risk or AI integration needs to work right the first time. With expertise in .NET, Python, Blazor, ASP.NET Core, SQL and agentic AI architecture (LLMs, reasoning engines, Semantic Kernel, LangGraph, tool-calling agents), I design systems where performance, reliability, and intelligent automation aren't optional—they're the baseline. I deliver AI in production, not prototypes. I’ve architected and deployed AI-powered systems across financial platforms, education and exam automation, and real estate market intelligence, including enterprise-grade solutions for organizations such as The New York Times, Project Management Institute (PMI), Walmart, Merit Wealth, Namfus and BlueberryCMS. --- **Here's where I'm most useful to you:** - **The AI Integration Trap** — You've been asked to add AI to your existing .NET system but don't know whether to use *Semantic Kernel*, raw OpenAI APIs, or a Python sidecar. I've made that decision dozens of times. I'll make it faster and safer for you. - **The Blazor Bottleneck** — Your Blazor app is slow, state management is tangled, and you're unsure if you chose *Server or WASM* incorrectly. I can diagnose what went wrong and map a clean path forward — often in a single session. - **The Legacy Modernization Cliff** — You have a 10-year-old .NET system that needs AI or modern tooling but wasn't designed for it. I specialize in *incremental refactoring paths* that don't require a full rewrite and don't break what's already working. --- **What I Do Best:** - **Software Architecture & System Design** — scalable, maintainable systems from greenfield to enterprise - **AI Agent Development** — production-grade agents with Semantic Kernel, LangGraph & AutoGen — *not demos* - **Blazor & ASP.NET Core** — Server, WASM, hybrid — full-cycle development and performance tuning - **Python & AI Automation** — RAG pipelines, workflow automation, voice AI, LLM integrations, chatbots - **Legacy .NET Modernization** — refactoring strategy, migration paths, incremental upgrades - **Architecture Audits** — identifying structural risk before it becomes a production incident, not after - **Debugging Complex Systems** — when the stack trace doesn't tell the whole story **If any of this sounds like your current situation — DM me. I respond to every message.**
An accomplished and high-motivated IT professional with 6+ years experience of IT leadership involved in web development, application development and System & Solution Architecture. My main competency is in building rich client-side applications, on both sides back-end and front-end. I strongly believe in TDD as the only way to build a bullet-proof code that makes everyone happy and it allows me to rest at night. Reaching 100% test coverage is my passion. **SKILLS:** ✅ Specialities: Computer Engineering, Software Engineer, Web Development, Mobile development, Open Source ✅ Languages:Ruby(6 years), Javascript(4 years), Nodejs(1 year), Elixir(1 year) ✅ Backend Frameworks: Ruby On Rails(6 years), Phoenix(1 year) ✅ Frontend Frameworks: AngularJS(4 years), ReactJS(2 years) ✅ Relational database:Postgresql(6 years), MySQL(6 years) ✅ NoSql databases:Elasticsearch(4 years), Redis(3 years), MongoDB(3 years) ✅ Other technologies:Rabbitmq, Redux, Universal rendering, HTML, CSS, SCSS, BEM, Docker, AWS, Google Cloud Platform, Webpack, Git, Progressive web apps **LINKS:** https://github.com/mpospelov https://stackoverflow.com/users/2460416/mpospelov https://codementor.io/mpospelov https://www.upwork.com/o/profiles/users/_~0182077648cc549f21/ https://www.toptal.com/resume/mikhail-pospelov
Rust Senior developer & CTO. From Fullstack engineer, to system and protocol programming with Rust. I have created a few large projects with rust, all are currently running in production, and converting all past projects into... Rust as well ;) I live rust, i breath rust, and I eat rust for breakfast.
Got a trouble with your React component? Need help with your Rails application? Or maybe your reducer in Redux is not working properly? I can help! I'm a developer with over 6 years of experience in web technologies. I've been working with Rails since 2011, React since 2013 and Redux since 2015. On a daily basis at work at Strategyzer, building online platform for building better business models.
Python, Django, Data Scraping, Web Crawling, Scripting, Data Processing, Linux, Servers.
Hey there! I've been creating applications for 25+ years, and I love teaching. Your skill level is not important to me. You're a beginner, intermediate or expert developer. No problem. We all are junior developers for a lifetime, always learning. I can teach you how to pick up a new skill, or upgrade your existing skills or update you on the latest technologies. I would be delighted to mentor you also on how to develop yourself and your career, or the books you should read, the courses you should take, etc. If you're trying to create a product for your company or your startup, I can guide you on how to make it a reality. Which technologies you need, how to learn them, how to apply them. You'll be building your products or MVP in no time. I'm a scalability and web apps expert. I've broad experience in testing, coding and architecting scalable web apps, creating new products, giving advice on how to build scalable products.
I am Sergey, a Web IT professional working in the industry for the last 26 years. I help companies and startups reduce development costs and make their products stand out. My experience combines both business and technical roles. This allows me to see things from multiple perspectives and create exceptional quality at all levels of the project. I'm excited to contribute in your business through my knowledge and skills.
I gained a lot of experience in programming code for my own startup and as a freelancer. My main focus is on building simple, well structured full stack (node.js, AngularJs, mongoDB, gulp, jasmine) prototypes. I'm eager to meet you, your idea and help you through your problems like many others have helped me before. I host meetups in Munich to improve coding style (Node.js, AngularJs).
I'm a Senior software engineering manager by profession with over a decade of experience in software engineering. I have advised several startups and mentored over 30 individuals on leveling up as a software engineer and setting them up for career progression. I have designed and implemented large-scale distributed systems, some examples 1\. Ingesting, Processing, Enriching, and transforming 1.5 Billion events per day via a clickstream pipeline. 2\. Designing Real-time odds and tickers applications for live odds and stock trading data to handle millions of concurrent users. The first company I worked for ( Poshmark ) IPO'd in 2020 and I was one of the founding engineers in the India team. The second company I worked for ( Squadstack ) grew 3x in revenue during my time there and I headed the growth engineering vertical of the company.
For the past few years I've been knee deep in Javascript, learning to make the best out of its quirks and empower clients with robust technology to support their business: - Angular - Ember - Polymer - React - Node + Express / Koa Focused on quality, with a strong view of TDD as a necessity for optimal assurance, I push my bounds daily in search of new ways to make users experience software as a means to improve themselves. Challenging is nothing but fuel for motivation.
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