I help startups and enterprises ship production-ready software - fast, clean, and built to scale. Over 9+ years, I've delivered 50+ projects across healthcare, logistics, real estate, and gaming, from greenfield builds to complex migrations and performance rescues. Clients hire me when they need a senior engineer who can own the full stack, make sound architecture decisions, and communicate clearly without hand-holding. How I Work: - Architecture-first: Clean boundaries, SOLID principles, DDD/CQRS, where it adds value - Quality by default: Automated tests, code reviews, documentation that actually helps - Performance-minded: Profiling, caching, async patterns, cost-aware cloud design - Transparent communication: Frequent demos, clear milestones, no surprises Tech Stack: - Frontend: React, Next.js, Angular, Blazor, Tailwind - Backend: ASP .NET Core, ElysiaJS, Node.js, FastAPI - Languages: C#, C++, TypeScript, Python, Kotlin, PHP - Databases: PostgreSQL, MS SQL, MongoDB, Redis, DynamoDB - Cloud: AWS, Azure, Docker, Kubernetes, GitHub Actions - Real-time: SignalR, WebSockets, gRPC, RabbitMQ

Hai, I am Chandradurga , I have been working as a Full Stack developer with great efficiency. I am familiar with Networking protocols like SMTP , PO3 , ModbusTCP , HTTP , Web Services , WebAPI .I have excellent skills in developing the front end and back end using C#.NET | ASP.NET | ASP.NET Core | WebAPI | HTML | CSS| Bootstrap | Java | Python | LLM |OpenAI API|MS Access | SQL Server | MySQL | Esp32 | STM32 |OCR | Tesseract , | PlatformIO. I also have developed Desktop applications using C++ | Visual C++ |QT C++| C#.NET | Java |Python OpenCV |FFMPEG AI

I'm a Mapbox Developer Network (MDN) expert and full stack geospatial developer based in Astana, Kazakhstan. With 7+ years of experience, I specialize in crafting powerful and visually compelling web mapping applications, spatial data pipelines, and GIS dashboards. My work has been featured by Mapbox, reflecting a high standard of technical execution and design. I’m passionate about transforming complex geospatial data into intuitive, actionable visualizations. Whether you need interactive globes, custom vector tile rendering, routing logic, or analytics dashboards - I deliver solutions that are fast, robust, and user-friendly. 🔧 Tech Stack & Expertise 🗺️ Web Mapping: Mapbox GL JS, MapLibre GL JS, Leaflet, Kepler.gl, deck.gl, Google Maps API, OpenLayers, ArcGIS JS API 🧮 Spatial Analysis: Turf.js, PostGIS, GeoPandas 🧰 Data Processing: Python, GDAL, Shapely, pandas 🛰️ OGC Standards: WMS, WMTS, WFS (via GeoServer) ⚛️ UI & Frameworks: React, Vue.js, Angular 🧪 Other Skills: C#, C++, Swift, Docker, PMTiles, SQL 🧩 My Approach I blend deep geospatial knowledge with clean UI design and efficient data architecture. Clients appreciate my ability to quickly understand project goals and deliver tailored, scalable solutions - whether starting from scratch or optimizing an existing codebase. Let’s work together to turn your geospatial vision into reality - with code that’s as elegant as it is effective.

✅Full-time freelancer ✅8 years of 100% job success Dual proficiency in trading and programming. Python based trading software developer. In-depth knowledge of Forex, Crypto, Equities, Options and Futures Market. Skills: -Trading Logic Automation, Robots -TWS API Interactive Brokers, TWS Gateway, ib_insync, ib_async -Algo strategies, Technical Analysis Tools and Automation, Spread Trading, Spread Algorithms -Market Making Algorithms, High Frequency Trading, News Trading -AI, ollama, Open AI, Chat GPT API, Gemma 3, DeepSeek-R1, Llama 4, Phi 4, Mistral -HFT Arbitrage, Statistical Arbitrage, Triangular arbitrage -Crypto API (Binance, Huobi, OKEx, Bitfinex, Bittrex, Kraken, GDAX, BitFlyer, Poloniex) -MetaTrader 4, MetaTrader 5, MQL4, MQL5, C-Trader, Ameritrade, Oanda, Ninja Trader, Trade Station -Financial Information eXchange. FIX 4.4, 5.0, FIXT 1.1, QuickFIX -REST, Socket Programming, API Development, WebSocket, Flask, FastAPI -Order Routing, Liquidity Providing, Liquidity Aggregators, Order Matching Engine, Order Book Aggregation -TradingView, WebHooks, Alert Setup, TradingView Connection To Any Broker or Exchange

Ship Faster, Scale Smarter I design and deliver production-grade software that blends modern web apps with practical AI. If you need one person to architect, build, and ship from clean APIs and real-time UIs to LLM-powered features and cloud infra I’m your engineer. What I Deliver * Reliable backends: battle-tested APIs (REST/GraphQL), idempotent jobs, observability, and sane error budgets. * Responsive frontends: SSR/ISR, accessible UI, state kept tidy, no laggy interactions. * Applied AI: LLM/RAG features that are fast, safe, and traceable (prompting, evals, guardrails). * Cloud that doesn’t bite: containerized, autoscaled, cost-aware; CI/CD from day one. Core Expertise Full-Stack * Scalable SaaS, microservices & serverless backends * Node/Express, FastAPI/Django; REST/GraphQL * Data models for millions of records (PostgreSQL, MongoDB, Redis), indexing & performance tuning * React/Next.js with robust state management and SSR/SEO AI/ML & Data * LLM apps: RAG, embeddings, vector search, retrieval tuning, safety filters * Vision/NLP pipelines: detection/segmentation/OCR with PyTorch/TensorFlow * Data engineering: clean ETL, feature prep, reproducible experiments * Deployments: Docker/Kubernetes, model packaging, CI/CD to AWS/GCP Cloud & DevOps * AWS/GCP/Firebase; Lambda/Cloud Run; S3/GCS; VPC, IAM, secrets * Docker + Kubernetes, IaC (Terraform), GitHub Actions/GitLab CI/Jenkins * Observability (logs/metrics/traces), rollouts, zero-downtime releases How I Work * Architecture first: clear interfaces, graceful failure modes, and future-proof data models. * Product-minded: I sweat UX states (empty/loading/error) and latency budgets. * Security & compliance aware: least-privilege, auditing, PII handling, rate limits. * Transparent delivery: issue tracking, PR discipline, previews, measurable milestones. Ideal Projects * SaaS platforms that need real-time features (websockets, streaming, collaborative UIs) * AI-assisted workflows (RAG over docs/data, summarization, semantic search, agentic tasks) * Modernization of legacy backends into clean APIs and typed frontends * MLOps: packaging models, evaluation harnesses, and reliable inference at scale Tooling & Stack * Languages/FE: TypeScript, JavaScript (ES6+), React/Next.js, Vue/Nuxt * BE/DS: Node.js, Express, Python, FastAPI, Django * DB/Cache/Queues: PostgreSQL, MySQL, MongoDB, Redis, Firebase * AI/ML: OpenAI APIs, Transformers, LangChain, PyTorch, TensorFlow, scikit-learn, CV/OCR * DevOps: Docker, Kubernetes, Terraform, AWS/GCP/Azure, CI/CD * APIs: REST, GraphQL; auth (JWT/OAuth), webhooks, webRTC/websocket * Quality: unit/integration tests (pytest/jest), code reviews, performance profiling If you’re looking for a hands on senior engineer who can own the backend, craft the frontend, and wire in AI the right way, send me a message with your goal, current stack, and timeline. I will propose a crisp plan and start shipping. Let’s build something!

I have been working on some projects relative to Intelligent Video Analysis for - AI Agent collecting lead for photographer business - Retriever and answer question based on given knowledge documentation using langchain, hugging face and OpenAI platform API - Traffic surveillance, vehicle detection, license plate recognition - Pose estimation - Re-identification (reID) system - Retail shop tracking management - people tracking for single camera and multiple cameras - Had about 6 years of experience with Deepstream So the experience that I consist of: + Skill: - Build Hailo Engine AI model on Pi Raspberry 5 edge device - Building/Training model Deep Learning for Objects Detection / Classification - Image and Video processing - Working on streaming video, understanding video Encode/Decode - Data mining (Data struct design, data analysis) - Optimizer algorithm/modeling - Video Encoding/ Decoding on GPU and CPU - Web development (I self develop the Web Application name Data Annotation Tool. The system manager and labeling data for image/video. Build own self-DATASET for training model) - WebRTC - DevOps + Programming language - C/C++, Python, JavaScript, Java, Go, Rust + Framework LLM: OpenAI Platform, LangChaib, SGlang / Ollama / vLLM Vision: OpenCV, DS-ML: Numpy, Pytorch, Caffe, Keras Nvidia: NVDEC/NVENC, TensorRT, Deepstream SDK, TAO Toolkit Database: Postgresql, MongoDB (Cloud / Atlas), MySQL, SQLlite, Redis Font-End: React, FabricJS Back-End: Django (Django REST), Message Serving: Kafka Apache, NATS, Elastic Others: FFmpeg, , GStreamer, Celery, Kurento + Clouds: AWS, Google Cloud, Digital Ocean + Tool / Software / Application - Linux, Window - Visual Studio Editor, Sublime Text - Docker - Copilot

Hi, I'm Raj👋🏻 I helped save $2 million in annual savings by automating payroll processes for a global workforce of over 1.3 million employees at Amazon. I also built offline features for Alexa, enhancing the user experience across 100 million devices worldwide. 🚀 Transforming ideas into scalable, efficient solutions with a passion for cutting-edge technology and a proven track record of delivering high-impact results. At Manitoba Hydro, I transformed data workflows, boosting productivity by 35% for a utility serving 600,000 customers, while automating processes to save time and resources. As a Full Stack Engineer at NinjaTech.ai, I developed scalable web applications and optimized backend systems, leveraging React, Node.js, and AWS to deliver seamless, high-performance solutions for clients. Technical Expertise: Languages: Java, JavaScript/TypeScript, Python, SQL Frameworks: React, Node.js, Express, AWS (Lambda, EC2, S3, DynamoDB) Key Skills: Microservices, RESTful APIs, CI/CD, Agile, SDLC Why work with me? I bring a unique blend of technical expertise, leadership, and problem-solving to every project. Whether it's automating complex systems or building user-friendly applications, I deliver solutions that drive efficiency and growth. 🔗 Let’s build something great together—reach out to discuss how I can help bring your vision to life!

Hello, Im a developer with 15 years of working experience. I have been working for companies from Russia, USA, Canada, Australia, Philippines. Have created applications for desktop, mobile and web. Main specialization - .NET stack (WPF, ASP.NET, Avalonia, MAUI), but also have experience in other areas. Have bachelor degree in applied math and computer science. Have rich expirience of using Selenium for automatization work with websites or data crawling. Main skills: Back-end: Asp.Net MVC, basic knowledge of NodeJS. Desktop: WPF, Avalonia. Mobile: MAUI, Xamarin. Front-end: Angular, Typescript, JQuery, AngularJS, Bootstrap, Chrome extensions Testing: Selenium, NUnit, Moq Infrastructure: Teamcity, Octopus, Azure Devops, gRPC, Git, SVN, JIRA Have worked with different DB: mostly MS SQL, but also MySQL, SQLite, Postgres. Have experience using ORM (EF Core, NHibernate) and directly accessing DB (Dapper). Could work both in team and as a separate developer. I have good learning ability - if I don't know something, usually it doesn't take much time to understand it. I have good skills in understanding code written by other developers, know how to write unit tests. I'm working with AI-tools: Claude code, Gemini, QWEN code.

💼 I'm a seasoned .NET desktop developer with over 15 years of experience crafting rich applications in WPF, WinForms, and Windows Services using C#, MVVM, and clean architectural patterns. I deliver high-performance, maintainable solutions with elegant UIs and scalable backends — tailored to your specific business needs. 💡 What I Offer 🎯 Custom WPF Applications with elegant UI and responsive design 🎯 MVVM Implementation with Caliburn.Micro for clear separation of concerns 🎯 Dynamic UI Design with XAML & C# — no drag-and-drop shortcuts 🎯 WinForms Solutions for rapid tool development and legacy modernization 🎯 Advanced Validation using IDataErrorInfo, DataAnnotations, and observable bindings 🎯 Windows Services Development for background automation, scheduling, and integration 🎯 Smooth Integration of DevExpress & Telerik for enhanced user experience 🎯 Service Hosting & Scheduling with WCF, REST APIs, Quartz.NET & MSMQ 🎯 Code Refactoring & Optimization for maintainability and performance 🎯 Deployment Expertise including ClickOnce, MSI installers, service auto-start & registry setup 🧰 Tech Stack Snapshot 🧠 UI/UX: WPF, XAML, WinForms, DevExpress, Telerik 🧠 Architecture: MVVM, Factory Pattern, Event-driven Windows Services 🧠 Validation: IDataErrorInfo, DataAnnotations 🧠 Services: Windows Service, Quartz.NET, Task Scheduler, MSMQ 🧠 Communication: WCF, REST API, SOAP 🧠 Backend: Entity Framework, SQL Server 🧠 Deployment: ClickOnce, MSI, Windows Installer, Scheduled Task Integration ✅ Why Clients Choose Me 🔧15+ years in .NET with deep WPF & WinForms specialization 🔧 Experienced in service-based architecture and background automation 🔧 Passion for clean, modular code guided by SOLID principles 🔧 Clear, Transparent communication supported by live demos 🔧 Reliable, detail-oriented partner offering long-term support

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