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Individual with 27,000+ hours worked on Upwork with 100% JOB SUCCESS. My experiences: ✓ OOP and System Design; ✓ Theoretical knowledge and practical experience with design patterns; ✓ Asynchronous and multithreading development (TPL); ✓ Rest API design, architecture and implementation; ✓ 3rd party API integration using existing packages or from scratch; ✓ Microservices and monolith architectures; ✓ GIT (Azure DevOps, github, bitbucket), SVN and TFS version control systems; ✓ .NET / .NET Core C#; ✓ TypeScript; ✓ JavaScript (jQuery, linq.js, lodash, underscore, moment, HighCharts); ✓ CSS/LESS/SASS, Bootstrap, Bootswatch; ✓ XML, XSLT, Serialization/Deserialization (XML, Binary, JSON); ✓ ASP.NET Core; ✓ ASP.NET MVC / Web API; ✓ AngularJS 1.x, Angular 2-21; ✓ React (basic); ✓ Kendo UI (JS and ASP.NET MVC wrapper) and DevExtreme; ✓ Bootstrap, Bootswatch; ✓ SMS integration (Twilio, Plivo, SMSru); ✓ Payments integration (Authorize.Net, Chargify, Stripe, Hint, Paymentwall) ✓ Email integration (SendGrid, MailGun, Gmail, custom SMTP); ✓ Reports integration (PowerBI, LogiReports, Crystal Reports); ✓ Medical partners inegration: Hint, Redox, EazyScripts, AthenaHealth, PokitDok, RxNT; ✓ SignalR; ✓ Microsoft Azure (Azure SQL, Azure AD, MobileApp, WebApp, ApiApp, Azure Storage, EventHub, Stream Analytics, Application Insights and others); ✓ AWS (EC2, Load balancer, ECS, S3, DynamoDB, Redis); ✓ WCF and WebServices; ✓ Entity Framework (Full and Core) ✓ LINQ and Dynamic LINQ; ✓ Database architect and optimization including Microsoft SQL/T-SQL; ✓ Caching (Redis); ✓ Brokers: RabbitMQ, MSMQ, Kafka, Azure Service Bus ✓ .NET Desktop (WinForms, WPF: MVVM, MVP); ✓ .NET for MacOs; ✓ Telerik, DevExpress, ComponentOne frameworks for WinForms and WPF; About me: • 16+ years of professional experience in all stages of the SDLC (Software Development Life Cycle) involving studying of the user requirements, analyzing, designing, implementation, testing, deployment, documentation and maintaining of various stand-alone, intranet, client-server and web-based projects with exposure to diverse business domains including Retailing, Medical, Financial and Banking • 12+ years of non-stop experience of working remotely and locally with companies located in USA and Germany • 8+ years of non-stop UpWork experience • Strong skilled in .Net technologies • Experience in developing cross-platform applications • Experience in client / server web-technologies • Solid background in computer science • Ability to work well within tight deadlines and under pressure • Self-motivated • Good team player with excellent coorganizational and mentoring skills • Fluent level of English

I have been an IT engineer for more than 12 years, including the Backend part, Database optimization, Server setup, WEB3, DevOps, custom blockchain development, and API of other Services. Have experience in developing projects from the very start in JavaScript, Golang, Rust, C++, Dart, Erlang, and Solidity. I am highly responsible for my work, punctual, and attentive to little details. I like complex tasks to do and finding nonlinear decisions. I was part of a team of such big projects as: - Elrond (EGLD) : Launch of IEO, development of a sharding system; - Crypto wallet Bread (BRD) : Development and audit of payment gateways; - CoinPayments : Development of payment gateways and storage of cryptocurrency funds. By working with me, you can be sure of the stable functioning of your application. Listed below are my experience and skills. – JavaScript (ReactJS, NodeJS, ECMAScript); – WebAssembly; – C++; – Rust; – Solidity; – Erlang; – Dart; – Golang. – GraphQL; – PostgreSQL; – LevelDB; – RocksDB. – PlayCanvas; – WebXR. – Blockchain Protocols; – Copy trading protocols and architecture; – Smart Contract Audit; – Exchange development (CEX); – Decentralized exchange development (DEX); – Arbitrage and Trading bots development; – ICO/IDO/IBCO/LBP/IFO; – Flash loans bots; – Front-running, snipe, and sandwich bots; – Wallet (flutter) development configuration; – TradingView configuration; – Meta; – Metaverse; – DeFi; – NFT; – GameFi. I've worked with the following services: – AWS (EC2, ELB, ASG, RDS, ElastiCache, S3); – AWS Serverless Fundamentals (Lambda, DynamoDB, Cognito, API Gateway); – Monitor, Trace and Audit your microservices using CloudWatch, X-Ray, and CloudTrail; – Linux, AWS, Bash & Python Scripting, Jenkins, Ansible, Docker, Kubernetes, Cloudformation, Terraform; – Sentry; – Pingdom; – Supervisor; – uWSGI; – Vagrant; – Git, CLI; – Ansible; – Apache; – Datadog; – Docker, Docker Compose; – Gunicorn; – Nginx. – CCXT; – OpenDAX; – OpenZeppelin Truffle; – MetaMask; – Ganache; – Remix IDE; – Geth; – Parity; – Web3.js – Ethers.js; – Infura; – Embark; – Brownie; – Alchemy; – Drizzle. – Bitcoin; – Lightning Network; – Ethereum Smart Contracts(ERC-20, ERC-721, ERC-223, ERC-777, ERC-1155, ERC-1337, ERC-3643 (ex-T-REX) and the ERC-1400); – Binance Smart Chain (BNB); – Cardano (ADA); – Solana (SOL); – Avalanche (AVAX); – Terra (LUNA); – Polkadot (DOT); – Polygon (MATIC); – Cosmos (ATOM); – Chainlink (LINK); – NEAR Protocol (NEAR); – Uniswap (UNI); – TRON (TRX); – Decentraland (MANA); – PancakeSwap (CAKE); – Toncoin (TON).

Experienced Technical Writer with emphasis on SRE, DevOps, and Cloud topics. Experienced DevOps engineer with significant experience in Infrastructure as Code using Terraform on multiple Hyperscalers and Cloud providers.

Greetings! I am an experienced web developer with over 6 years of expertise in creating modern, responsive, and functional web applications for small and medium-sized businesses and also fixing and improving working applications. I strive to deliver high-quality digital solutions tailored to the unique needs of each client. - I carefully listen to clients, strive to understand their business processes and goals, to offer the most effective solution. - I believe communication is the key factor for a successful project. I regularly provide status updates and promptly respond to inquiries. - Adhering to high code standards, conducting thorough testing before deployment to ensure stable and error-free applications. - Keeping up with new technologies and trends. Participating in professional conferences and exploring new tools to enhance my work efficiency. I am ready for new challenges and eager to collaborate on projects that will bring success to your business. Feel free to reach out to me to discuss details and ask any questions.

Hello! I’m a passionate and experienced Unity Game Developer with over 5 years of professional experience in game development, specializing in C# programming, custom systems design, and performance optimization. I’ve worked on a variety of projects ranging from casual mobile games to my current solo endeavor—a medieval ARPG featuring custom-built systems and a unique gameplay experience. My expertise lies in crafting high-quality, scalable, and efficient game systems while delivering polished solutions that meet client expectations. Whether you need help with building new features, optimizing existing codebases, or creating robust tools for your project, I am here to help! What I Can Do for You Custom Game Systems Development: From combat mechanics to resource management, I design modular and scalable systems tailored to your game’s needs. Performance Optimization: Using Unity’s profiler and best practices, I ensure your game runs smoothly on all target platforms. Custom Tools & Frameworks: Need a unique tool or system? I’ve developed my own ECS architecture, physics engine, and resource management pipelines. Bug Fixing & Code Refactoring: I specialize in cleaning up legacy codebases and improving stability while reducing bugs. Full Game Development: From prototyping to launch, I can handle end-to-end game development tasks. Notable Achievements Developed a custom physics engine for my solo ARPG project, outperforming Unity’s built-in physics for my specific use case. Refactored the crossword engine at Qiiwi Games, improving flexibility and reducing bugs. Led the development of Miss Merge at TrueMyth Games—the studio’s first profitable title with thousands of daily active users. Delivered 10+ heroes with unique abilities for Holyday Studios’ Firestone, accelerating content delivery timelines. Technical Skills Game Engines: Unity (5+ years) Programming Languages: C#, C, C++ Systems: Combat, Physics, VFX, Projectiles, Addressables Tools: Shader Graph, Git, Jira Practices: ECS Architecture, SOLID Principles, Agile/Scrum Why Work With Me? I bring a combination of technical expertise and creative problem-solving to every project. My approach is highly collaborative—I take the time to understand your vision and deliver results that exceed expectations. Whether you’re looking for a developer to join your team or someone to take ownership of specific tasks, I am committed to providing top-notch solutions. Let’s create something amazing together! Feel free to reach out—I’d love to discuss your project.

15+ Years of Engineering Excellence. Transforming Complex Data Chaos into Scalable Enterprise AI Solutions. You hired developers to integrate AI, but you can’t tell if they are building the right workflows — or building them right. Your technical infrastructure is burning cash, data is leaking between your systems, and you are spending half your week making architectural decisions you shouldn't be making alone. If I were architecting your system, I would focus on creating a modular, cloud-native blueprint where data flows seamlessly, AI components reason with deterministic accuracy, and your operational costs drop by design. I am a fractional CTO, AI Architect, and Lead Data Engineer with a Ph.D. in Mathematics. I embed with your business to provide senior technical leadership without the full-time corporate overhead. I bridge the gap between heavy enterprise data warehousing (DWH), microservices, and frontier generative AI. 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 I don't just jump on a brief weekly advisory call to give generic feedback. I take absolute ownership of the technology side of your business: Architecture & Guardrails: I make core architecture decisions, design resilient multi-agent systems, and prevent critical data formatting leaks. Quality Oversight: I manage developers, enforce high coding standards, perform strict code reviews, and keep delivery on track. Lightweight Agile: I introduce short sprints and daily check-ins so that an underperforming agency or developer is caught in week two, not month three. Core Technical Stack & Keywords AI & Generative Models: LangGraph, LangChain, AutoGen, OpenAI (GPT-4o), DeepSeek, Llama, Gemini, Vertex AI, RAG Pipelines, Multi-Agent Orchestration. Data Engineering & DWH: Data Modeling, Data Warehousing, Data Lakes, Self-Healing ETL Pipelines, Anomaly Detection. Databases & Infrastructure: PostgreSQL (+ pgvector), Oracle/Exadata, MS SQL, Google BigQuery, Snowflake, AWS Redshift, Docker, Kubernetes, GitLab CI/CD. Backend & Scripting: Python, Node.js, PL/SQL, SQL, Java, Golang. Selected Track Record & Milestones AI-Powered Multi-Agent Platforms (Travel & EdTech): Designed and built automated multi-agent AI frameworks from scratch featuring real-time conversational streaming voice interfaces and semantic vector searches (RAG) for unmatched response accuracy. Enterprise FinTech Infrastructure Modernization (VP of Engineering): Refactored 12+ core legacy trading services into high-load, cloud-native microservices with NATS eventing, eliminating system friction across global time zones. Scalable DWH & Global Data Engineering (CTO / Tech Lead): Directed 20+ full-cycle data engineering projects. Engineered automated, self-healing ETL pipelines and reduced enterprise ETL maintenance costs by 40%. 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨𝐧'𝐭 𝐃𝐨 I am not writing boilerplate code 40 hours a week. I review architecture, unblock your engineering team, and handle high-level logic. I am the architect, not the construction crew. I do not make product/business decisions. You decide what to build to hit your market target. I decide how to build it so it scales reliably and doesn't crash under high-load transactions. I am not an agency. I have no affiliation with outsourced development shops. When I recommend a tool, a framework, or a talent hire, it is 100% unbiased. 𝐅𝐀𝐐𝐬 𝐐: Can you participate in investor or due diligence calls? 𝐀: Absolutely. I have extensive experience translating complex financial, auditing, and technical data into clear language that investors, stakeholders, and compliance officers understand. You can put me on your pitch materials or website as your technical advisor. 𝐐: What if my current team or outsourced agency is underperforming? 𝐀: Once I introduce structured sprints, code observability tools, and automated pipelines, it becomes impossible to hide behind vague deadlines. I coach internal talent first — and if that doesn't work, I help you make the transition. 𝐐: What tech stack do you work with? 𝐀: I am stack-agnostic, but I specialize heavily in Python, Node.js, PostgreSQL, AWS, and modern generative ИИ frameworks. I choose technology that fits your current business stage and operational budget, not just what's trendy. Let's Build Something Scalable If your business matches this situation, send me a message. Tell me what you are building, what is going wrong, and what you’ve tried so far. I will tell you honestly whether I can help you fix it. Let’s connect for a brief discovery session to align your system architecture with your business goals.