Hire the Best .NET Framework C# Engineers
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Making my way in IT world (so far webstores, automation, robotics), bringing extensive experience in finance, investing and aviation with me.

Drawing on 18+ years of experience in diverse technologies (including Amazon Web Service), I deliver innovative, well-architected cloud-based solutions for challenging environments. As a certified AWS Solutions Architect (Professional and Associate) with AWS Security Specialty, I design, build, and optimize scalable, secure, and cost-effective architectures. Highlights: ✅ 18 years in IT; 12 years as CEO, Founder, and AWS Solutions Architect ✅ Successfully led 50+ projects for 20+ clients across industries ✅ Specialized in cloud migrations, serverless architectures, and cost optimization ✅ Certified AWS Solutions Architect (Professional & Associate) and AWS Security Specialty → Key Expertise: Cloud Architecture & DevOps ✓ Extensive experience designing serverless platforms (e.g., VOD systems, Tibica optimizations, Infoplay CMS). ✓ Proficient in IaC tools like AWS CloudFormation and Terraform for infrastructure automation. ✓ Expertise in securing systems with AWS IAM, Cognito, and Keycloak. AWS Solutions & Services: ✓ Core: AWS Lambda, API Gateway, DynamoDB, S3, CloudFront, MediaConvert, Glue ✓ Analytics: AWS EMR, Kinesis Streams, SageMaker, Athena ✓ Security: AWS Security Hub, GuardDuty, Keycloak ✓ Deployment & Optimization: AWS CodePipeline, Docker, Kubernetes, Helm Programming & Frameworks: ✓ Languages: NodeJS, Python, JavaScript ✓ Frameworks: ReactJS, VueJS, Redux, Vuetify Industries Served: → Healthcare, Mortgage, Medicine, Insurance, Retail, Advertising, Media, Security Main skills: ✓ Skilled in planning and executing cloud migrations (e.g., Docker to AWS Serverless). ✓ Expertise in optimizing serverless architectures for performance and cost (e.g., Tibica optimizations). ✓ Proven track record of designing scalable, compliant solutions for diverse industries. ✓ In-depth knowledge of AWS Well-Architected Framework and service combinations like Lambda, DynamoDB, MediaConvert, and Glue. ✓ Ability to design end-to-end secure, scalable platforms tailored to client requirements. ✓ Expertise in designing and deploying serverless architectures (e.g., VOD platform, Infoplay CMS). ✓ Skilled in integrating AWS services like Lambda, API Gateway, and CloudFront for scalability and resilience. ✓ Proficient in cost optimization strategies, including reserved instances and pay-as-you-go models. ✓ Experience in securing systems with IAM, Cognito, and Keycloak. ✓ Hands-on knowledge in managing infrastructure with IaC tools like CloudFormation and CodePipeline. Case Studies Summary 1. Video on Demand (VOD) Platform for Roligt AB - Developed a serverless VOD platform with a super-admin panel, publishing platform, and secure video page. - Leveraged AWS services like MediaConvert, MediaPackage, Lambda, API Gateway, DynamoDB, and CloudFront. - Achieved scalability, cost efficiency, and GDPR compliance​​. 2. Custom Digital Signage System for Infoplay - Built a serverless content management system reducing costs by up to 80%. - Integrated AWS Lambda, API Gateway, S3, Cognito, DynamoDB, and MediaConvert for scalability and flexibility​. 3. Tibica Cloud Platform Optimization - Enhanced performance and reduced latency by optimizing serverless architectures. - Transitioned Tibica’s Lambda functions to ARM-based architecture for cost savings and better efficiency​. 4. Docker to AWS Serverless Migration - Migrated Docker applications to AWS Serverless architecture using Lambda, resulting in up to 40% cost savings and auto-scaling capabilities​. 5. AWS Cost Optimization - Conducted a Well-Architected Framework Review to align cloud operations with best practices. - Identified cost-saving opportunities like rightsizing and reserved instances​. 6. Secure SSO Solution - Built a custom SSO solution using Keycloak and AWS services like EC2, RDS, and Cognito, achieving extensive customization and significant cost reduction compared to alternatives like Okta​. 7. MVP Development - Created scalable and secure MVPs on AWS using Lambda, API Gateway, Glue, and other serverless technologies. - Optimized for rapid iteration, security, and cost-efficiency​​.

𝐈 𝐚𝐦 𝐚 𝐒𝐞𝐧𝐢𝐨𝐫 𝐀𝐈 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭 𝐚𝐧𝐝 .𝐍𝐄𝐓 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐰𝐢𝐭𝐡 𝟐𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 building production software across 𝐠𝐨𝐯𝐞𝐫𝐧𝐦𝐞𝐧𝐭, 𝐡𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞, 𝐭𝐫𝐚𝐧𝐬𝐩𝐨𝐫𝐭, 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞, 𝐚𝐧𝐝 𝐒𝐚𝐚𝐒 𝐞𝐧𝐯𝐢𝐫𝐨𝐧𝐦𝐞𝐧𝐭𝐬. My core strength is designing reliable systems that combine mature enterprise engineering with modern AI. I work across architecture, backend development, legacy modernization, agentic AI, private LLM deployment, and self-hosted inference infrastructure. Recent work includes: • Architecting a role-specialized multi-agent platform with an approximately 30,000-line Python runtime • Building and operating a 6-node, 10-GPU local inference environment with approximately 496 GB VRAM • Deploying large language models using vLLM, SGLang, tensor parallelism, FP8, and NVFP4 quantization • Pruning and publishing a Qwen3.5-397B-A17B model that reached more than 1,000 Hugging Face downloads • Building multimodal AI assistants with web search, image generation, vision, and video understanding • Maintaining a .NET 9 and Next.js multi-tenant workshop platform evolving into a commercial SaaS product Before moving deeply into AI, I spent two decades delivering business-critical .NET systems, including Estonian government registries, court systems, hospital software, transport platforms, and national X-Road and eID integrations. 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘄𝗶𝘁𝗵: • 𝗔𝗜 𝘀𝘆𝘀𝘁𝗲𝗺 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗮𝗻𝗱 𝗺𝘂𝗹𝘁𝗶-𝗮𝗴𝗲𝗻𝘁 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 • 𝗣𝗿𝗶𝘃𝗮𝘁𝗲 𝗮𝗻𝗱 𝗹𝗼𝗰𝗮𝗹 𝗟𝗟𝗠 𝗱𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁𝘀 • 𝗥𝗔𝗚, 𝗺𝘂𝗹𝘁𝗶𝗺𝗼𝗱𝗮𝗹 𝗔𝗜, 𝗮𝗻𝗱 𝗶𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗮𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁𝘀 • 𝗖#, .𝗡𝗘𝗧, 𝗔𝗦𝗣.𝗡𝗘𝗧 𝗖𝗼𝗿𝗲, 𝗪𝗲𝗯 𝗔𝗣𝗜𝘀, 𝗮𝗻𝗱 𝗣𝘆𝘁𝗵𝗼𝗻 • 𝗟𝗲𝗴𝗮𝗰𝘆 .𝗡𝗘𝗧 𝗺𝗼𝗱𝗲𝗿𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗱𝗲𝗳𝗲𝗰𝘁 𝗿𝗲𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻 • 𝗗𝗼𝗺𝗮𝗶𝗻-𝗱𝗿𝗶𝘃𝗲𝗻 𝗱𝗲𝘀𝗶𝗴𝗻, 𝗰𝗹𝗲𝗮𝗻 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲, 𝗮𝗻𝗱 𝘁𝗲𝘀𝘁-𝗱𝗿𝗶𝘃𝗲𝗻 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • 𝗣𝗼𝘀𝘁𝗴𝗿𝗲𝗦𝗤𝗟, 𝗦𝗤𝗟 𝗦𝗲𝗿𝘃𝗲𝗿, 𝗗𝗼𝗰𝗸𝗲𝗿, 𝗟𝗶𝗻𝘂𝘅, 𝗮𝗻𝗱 𝘀𝗲𝗹𝗳-𝗵𝗼𝘀𝘁𝗲𝗱 𝗶𝗻𝗳𝗿𝗮𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 I am best suited to technically demanding projects where reliability, maintainability, security, and clear architectural thinking matter. Send me your current architecture, challenge, or product idea, and I will give you an honest technical assessment of the best path forward. :)

React Developer and Full Stack Developer who builds custom Web Application product for B2B clients, from interface to backend, production-ready solutions. Most of my work is Full Stack Developer React Node delivery, where a Front end developer React , Node.js backend developer support one business workflow end to end. As a Node.js Developer I own the REST API logic, authentication, roles and permissions, the data layer behind each product. As a Web developer ( MERN stack ) I focus on practical Web Application Development that ships, scales, and stays maintainable, with clean API Integration at the core. ✔️14+ years of professional development experience as Full stack developer ✔️40+ admin panel client portals delivered as React native App developer , Full stack developer React Node ✔️50+ EU and US B2B clients served ✔️60+ SaaS platform, CRM system, dashboard product built ✔️130+ successfully completed projects ✔️200+ REST API integration implemented ✔️React Developer | Full Stack Developer ( Full stack developer AI ) expertise ✔️Experience leading development teams of up to 6 specialists As a React Developer I build Web Application interfaces with React.js, Next.js, TypeScript and Responsive UI , wired to live data through API Integration I deliver usable, fast interfaces. As a Node.js Developer and Backend Developer I build the REST API layer, ExpressJS services, authentication, roles, permissions, payment flows and CRM integration, combining engineering expertise with a UX Designer mindset to take each solution from interface to backend. Many clients come to me as a Node.js Developer when a frontend already exists but the API, the data model, the business logic need to be done right. As a Backend Developer I keep the Node.js layer predictable, documented, as a Node.js Developer I handle the API Integration between third-party services, the database, the frontend. A typical Full Stack Developer React Node project for me looks like this: a SaaS platform or internal business tool with a React frontend, a Node.js backend, a structured database and an admin workflow for the team behind it. On every Full Stack Developer React Node build I design the database structure, the REST API , the dashboards and the permissions model so the product holds up as it grows. This Full Stack Developer React Node approach keeps frontend and backend in one system. Hiring one Full Stack Developer React Node engineer also keeps the React Developer and Node.js Developer decisions consistent across the whole build. I also work as a Directus Developer | Headless CMS Developer . On 20+ content-driven, data-heavy products I use Directus CMS or Strapi as a headless backend, which gives clients a clean admin panel and an API-ready foundation. As a Directus Developer I model the data, set roles and permissions, and connect a React frontend through REST API ; as a Strapi Developer I do the same on Strapi. Headless CMS work with Directus CMS pairs naturally with my React developer firebase, Node.js Developer delivery. Stack I use daily: React, React.js, Next.js, Node.js, TypeScript, JavaScript on the application side; ExpressJS, REST API , API Integration on the service side; SQL, MySQL, MongoDB, Firebase and Supabase for data; Directus CMS | Strapi for headless content. Authentication, roles, permissions, payment flows, dashboards, data tables, filters, admin workflows are standard parts of how I deliver Web Application Development . How I work on a Full Stack Developer React Node Discovery and scope first Architecture, backlog Design if needed Development in sprints QA Production release Support after launch. As a Web Developer and JavaScript Developer I write code the next developer can actually read and extend. Typical projects clients hire me for: SaaS platform development, CRM development, admin panel, marketplaces, booking website, lead generation website, dashboard, client portal, internal business tools, e-commerce platform and API-based Web Application work with workflow automation and business automation. Clients also find me under related searches that match my real stack. ⚛️ React developer side: React Native Developer React next js developer ( nextjs ) Full Stack Developer Supabase React Front-End Developer Full-Stack ⚙️ Full stack developer side: Python Full Stack Developer Full Stack Developer AI Full Stack Developer Shopify Full stack React Native Spring Boot Full Stack Node.js React Senior Full Stack Developer Senior Full stack .net 🗄️ Backend developer side: Node.js Backend Developer Back End Developer Node.js Python Developer 🔧My additional expertise: WordPress Developer , Mobile App Developer , Vue Angular, Strapi developer, Stripe , Agile Software Development 💡If you need a React Developer | Full Stack Developer React Node engineer | Node.js Developer for a serious product, I can take it from architecture through release and support. Let's talk about your product and what it needs to do.

🏆 Senior Full-Stack AI Developer | React • Next.js • Node • AI | $200K+ Earned · 100% JSS Founders hire me when their MVP needs to ship in weeks - and still hold up past 100K users. I build AI-powered SaaS and mobile apps that real customers pay for. The kind of code your next developer won't have to rewrite. PROBLEMS I SOLVE Most founders come to me with one of these: ❌ No clear technical roadmap: every developer gives a different answer. ❌ An existing product that's slow, breaking or impossible to maintain. ❌ A codebase from cheap developers: broken architecture, missed deadlines, technical debt blocking every new feature. ❌ Pressure to ship fast but no trust left after being burned before. Here's why it keeps happening: most freelancers code feature by feature without thinking about what happens at month six. I don't. Every decision I make stack, architecture, deployment assumes your product will grow, your team will change and the next developer will need to read what I wrote. 120+ shipped projects. 20+ countries. Zero rebuilds requested. ──────────────────────────────────────── WHAT YOU GET 🔷 A technical roadmap before a single line of code is written Every custom enterprise system starts with a plan. As a Full Stack Developer React specialist, I map out stack decisions, data models, and integrations first whether it's a full stack developer React Node API, a full stack developer Supabase React platform or a full stack developer React Firebase app. Projects without a plan cost 3x more to fix later. 🔷 A production-ready product, not a dressed-up prototype As a Full Stack Developer React Node developer, I build advanced B2B products ready to go live immediately. Rapid delivery without cutting corners clean code, testing, CI/CD, deployment pipelines everything needed to stay live under real load. 🔷 Frontend and UI/UX users actually enjoy As a react developer and web developer, I build fast, intuitive interfaces: CRM systems, dashboards, marketplaces with real-time updates, automation platforms and SaaS products as a full stack node.js react system where frontend and backend work as one. For API-driven products I work across react nodejs and react redux architectures. 🔷 Backend systems that don't break under pressure Node js with Express, Django and Flask for Python-heavy workloads, Stripe and cloud infrastructure built with proper auth, business logic and integrations. As a python full stack developer I handle data pipelines, automation, and react js applications where performance matters. 🔷 AI features that add real product value As an AI-focused full stack engineer, I build AI-powered, AI-driven, AI-enhanced and AI-focused features agentic workflows, AI-assisted and AI-augmented interfaces, multi-agent systems with MCP, chatbot and chat experiences, and LLM integrations via OpenAI or Claude Code. If your SaaS needs to be AI-native, I know how to build that. 🔷 E-Commerce, CMS & broader stacks As a Full Stack Developer React, Shopify specialist and wordpress developer, I build storefronts and platforms that convert. I've also worked across laravel vue, mern, ruby on rails, react next node supabase react native and .net full stack developer codebases adapting to what you have instead of forcing a rewrite. ──────────────────────────────────────── MY APPROACH 1. Discovery first: I act as your architect and partner before writing a single line. 2. Architecture before code: a plan you approve. No black boxes. 3. Rapid, iterative delivery: real progress every week. I'm a fast builder who doesn't cut corners. 4. Honest communication: you hear about problems from me first. 5. Built to hand off: clean, advanced code your team can work with. ──────────────────────────────────────── SDA COMPANY Behind this profile is SDA Company a focused, senior software development team I founded. We're not hiring we're selective. Over 5+ years we've helped clients raise funding, hit deadlines and scale to thousands of users. As CEO and lead specialist, I oversee every project directly. You get a founder with skin in the game, backed by a team that executes. ──────────────────────────────────────── 💡 Have a product to build or a platform to fix? Send me a message - no pitch. Just a real conversation. Stack: React / React.js, Next.js, Node.js, Python, Django, .NET, Laravel, Supabase, Firebase, PostgreSQL, MongoDB, Tailwind CSS, WordPress, MERN, GraphQL, Stripe, AWS, Docker,

𝐈 𝐞𝐦𝐩𝐨𝐰𝐞𝐫 𝐭𝐞𝐚𝐦𝐬 𝐭𝐨 𝐬𝐡𝐢𝐩 𝐟𝐚𝐬𝐭𝐞𝐫 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐩𝐫𝐨𝐯𝐞𝐧 𝐀𝐈-𝐀𝐮𝐠𝐦𝐞𝐧𝐭𝐞𝐝 𝐐𝐀 & 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐲𝐨𝐮 𝐜𝐚𝐧 𝐭𝐫𝐮𝐬𝐭. 𝐓𝐨𝐨𝐥𝐬: Playwright | Selenium | Cypress | Appium | NightwatchJS | ACCELQ | Mabl | Testim 𝐖𝐨𝐫𝐤𝐅𝐥𝐨𝐰: BrowserStack | GitHub Actions | Jenkins | GitLab | Dockers | CI/CD | Framework design 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: AWS | ISTQB-CTFL | CSM | CSPO 🧪𝐌𝐚𝐧𝐮𝐚𝐥 𝐐𝐀: Requirment Analysis | Test Cases Design | Test Execution | Cross-Browser Testing | Bug-Reporting / Follow-up 🤖 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐞𝐝 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐓𝐨𝐨𝐥𝐬: Playwright | Selenium | Cypress | Appium | NightwatchJS | Ranorex | JMeter | k6 🧰 𝐎𝐭𝐡𝐞𝐫 𝐓𝐨𝐨𝐥𝐬 & 𝐃𝐞𝐯𝐎𝐩𝐬: TestRail | TestMo | XRay | JIRA | BugZilla | Jenkins | TeamCity | GitHub Actions 🏅𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: - 𝐈𝐒𝐓𝐐𝐁-𝐂𝐓𝐅𝐋 - 𝐀𝐖𝐒 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐂𝐥𝐨𝐮𝐝 𝐏𝐫𝐚𝐜𝐭𝐢𝐭𝐢𝐨𝐧𝐞𝐫 - 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐒𝐜𝐫𝐮𝐦 𝐌𝐚𝐬𝐭𝐞𝐫 - 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐒𝐜𝐫𝐮𝐦 𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐎𝐰𝐧𝐞𝐫 🚀 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: - 𝐓𝐞𝐬𝐭 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Build robust, scalable testing architectures using Modern tools - 𝐂𝐨𝐦𝐩𝐥𝐞𝐱 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: Streamline intricate testing workflows with all possible integrations - 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐀𝐬𝐬𝐮𝐫𝐚𝐧𝐜𝐞 𝐋𝐞𝐚𝐝𝐞𝐫𝐬𝐡𝐢𝐩: Ensure exceptional user experiences across all platforms 🎯 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: - 𝐅𝐮𝐥𝐥-𝐂𝐲𝐜𝐥𝐞 𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐀𝐬𝐬𝐮𝐫𝐚𝐧𝐜𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬: Complete E2E QA coverage from planning to post-release. - 𝐂𝐮𝐬𝐭𝐨𝐦𝐢𝐳𝐞𝐝 𝐓𝐞𝐬𝐭 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Tailored automation frameworks for your tools and workflows - 𝐂𝐨𝐦𝐩𝐫𝐞𝐡𝐞𝐧𝐬𝐢𝐯𝐞 𝐀𝐏𝐈 𝐚𝐧𝐝 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐓𝐞𝐬𝐭𝐢𝐧𝐠: Thorough validation of APIs, logic, and data integration. - 𝐂𝐈/𝐂𝐃 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧: Embed QA in CI/CD for faster, safer releases. - 𝐂𝐫𝐨𝐬𝐬-𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧: Work closely with teams to ensure continuous quality. If you are looking for a QA expert who delivers high-quality, scalable testing solutions that boost development efficiency and ensure product reliability, let’s connect! I look forward to collaborating. 𝐒𝐚𝐫𝐟𝐫𝐚𝐳 𝐇𝐮𝐬𝐬𝐚𝐢𝐧