Hello, I am a full stack software developer, freelancing world wide. I apply SDLC, OOAD, SOLID and other software craftsmanship practices.. but not forget to use KISS principle. I’m experienced in creating web applications, web services, specializes in scalable, enterprise-level application development and engineering solutions for exceptionally high throughput. Over 10 years of experiences in technical consultant, and architect, specializes in full-stack, highly scalable, real-time data services, I have delivered top quality technical architecture, programming, testing and solutions for complex problems on-time and within budget.. I'm an Agile Kanban practitioner who loves to collaborate on development projects. Languages and Frameworks: .Net Core, C#, Nest js, Next js, Python, Node.js, Angular, ngRx, React, Redux, Mobx, Vue js, Knockout.js, Cordova , Express.js, Gulp.js, Mean Stack, ASP.Net MVC, C#, REST API, Grunt, Javascript, Jquery, HTML5, CSS, Bootstrap, Material Design, GraphQL , MongoDB, PostgreSQL, Test-driven Development (TDD), Software Architecture, SAAS, Microservices, Serverless, AWS, Azure Cloud Services, Azure Pipeline, CI/CD DevOps, Docker, Kubernetes. Highly skilled and experienced in: . Web User Interface, User Experienced modern design and implementation . Database creation, integration, and management . Using back-end frameworks to build server-side services, Web API, Restful service implemenetation and integration . Cloud server integration, especailly Azure . Content management system (CMS) development, deployment, and maintenance . Data analysis and reporting, visualization and business intelligent with Power BI . Architect .NET solutions. Well-versed in .NET frameworks, Web/Windows Services, and Team Foundation Servers, GIT . Gathering business requirements, completing key architecture design, and overseeing low-level and high-level design and documentation across the software development lifecycle. I'm working with agility, cooperation with trust and quality, experienced in Scrum Agile. I'm looking for long-term cooperation in freelancing work with you ! Thank you in advance for your time and consideration.

Backed by 100% Job Success over 60 projects, 𝐈 𝐨𝐟𝐟𝐞𝐫 𝐅𝐑𝐄𝐄 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐚 𝐅𝐑𝐄𝐄 𝐪𝐮𝐢𝐜𝐤 𝐫𝐞𝐯𝐢𝐞𝐰 𝐨𝐟 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭. AI Full stack Developer with 9+ years across Web3 & AI. I build production agents that automate real workflows including RAG, multi-agent systems, trading & onchain automation, blockchain onchain data, Fintech, DeFi, RWA, Payment gateway. 🤖 AI agent work (what I ship now): - Custom AI agents & copilots - LangGraph, LangChain, CrewAI, OpenAI & Claude APIs - RAG pipelines grounded in your data - vector DBs, evaluation suites, guardrails against hallucination - Multi-agent orchestration - planner/worker/reviewer patterns, tool use, memory - Workflow automation - n8n, Slack/Telegram/WhatsApp bots, CRM & API integrations - Trading & onchain agents - bots that read markets, execute strategies, and interact with smart contracts safely ⛓️ Web3 foundation (9+ years): - DeFi protocols - lending, staking, perp DEXs, cross-chain (LayerZero, Axelar) - Smart contracts - Solidity, Rust, Foundry, audit-ready code - Wallets & infra - ERC-4337 account abstraction, MPC wallets, rollups (OP Stack, zkSync) Selected projects: - Multi-agent AI platform serving live users - Decentralized perpetual exchange - AI trading agent with onchain execution and risk limits - Liquity fork with multi-collateral DeFi architecture - RAG support agent resolving 60% of tickets automatically How I work: fixed scope, clear milestones, daily updates, full code ownership on delivery. I'll always recommend the smallest build that gets you a working agent in production — not the biggest. 📩 Send me the workflow you want automated (or the protocol you want built) and I'll reply with a concrete approach within an hours or book a 30-min consultation directly from this profile.

Hello, I’m Jason Nhien Truong, a Senior Software Engineer and Software Architect with over 20 years of professional experience delivering reliable, maintainable software solutions for businesses across multiple industries. I specialize in C# and .NET development, Windows desktop applications, enterprise web systems, SQL databases, and Azure-based platforms. I help clients modernize legacy systems, stabilize and scale existing products, and build new applications with a strong focus on performance, usability, and long-term maintainability. I work closely with stakeholders to translate business needs into practical, well-structured technical solutions. What I offer Full-stack .NET development I work across the .NET ecosystem, from legacy ASP.NET Web Forms to modern .NET 8 APIs and microservices. I design secure, scalable backend systems with clean architecture and clear separation of concerns. Windows desktop application development I have extensive experience building and maintaining Windows desktop applications using WinForms and WPF, including MVVM-based WPF applications. I focus on responsive UI behavior, clean data binding, maintainable ViewModel design, and user-friendly workflows for business-critical desktop software. Enterprise UI with DevExpress and Telerik I have deep expertise with DevExpress and Telerik controls for WinForms and web applications. I redesign and modernize complex UIs to improve usability, consistency, and performance without breaking existing business logic. Database architecture and optimization Strong experience with SQL Server, PostgreSQL, MySQL, and Azure SQL. I design schemas, optimize queries, and ensure data integrity and stability in production systems. Azure cloud and DevOps Hands-on experience deploying and maintaining applications on Azure, including CI/CD pipelines, containerized services, background processing, and cloud-based integrations. Testing and automation I write unit and integration tests using xUnit and NUnit, and implement automation with Selenium and AutoIt to improve quality and reduce regression risk. Key technical skills Languages and platforms C#, .NET Core, .NET 8, ASP.NET, SQL, JavaScript, HTML, CSS, Python Desktop development WinForms, WPF, MVVM, DevExpress WinForms, Telerik UI Frameworks and tools Entity Framework, LINQ, Docker, Azure DevOps Databases SQL Server, PostgreSQL, MySQL, MongoDB, Azure SQL Cloud and monitoring Azure, Kubernetes, Azure Service Bus, Prometheus, Grafana Architecture Microservices, Clean Architecture, Domain-Driven Design Selected projects Web forecasting application maintenance Maintained and enhanced a legacy ASP.NET Web Forms application using SQL Server 2022 and Telerik UI. Improved UI workflows, business logic, and performance. Betx – cloud-native microservices platform Developed backend microservices using .NET 8 and Web API. Worked on PostgreSQL data modeling, Azure Kubernetes deployment, secure APIs, messaging, and observability with Prometheus and Grafana. Custom ERP system for manufacturing Built a custom ERP system using C# and SQL Server, including workflows, reporting, role-based access, and third-party integrations. Carrier pricing API integration Integrated FedEx and UPS APIs for real-time pricing, data synchronization, and robust error handling with retries and logging. Why work with me I bring deep technical experience, strong ownership, and a business-focused mindset. I communicate clearly, meet commitments, and build software that remains stable and maintainable over time. Availability Open to full-time or part-time engagements. Flexible with time zones for long-term projects. If you’re looking for a senior .NET engineer who can handle both backend systems and Windows desktop applications with confidence, feel free to reach out.

Most dev shops ship isolated features. We build the core systems that run your day-to-day operations, and we stay accountable for outcomes, not just output. I'm Jack, CEO of NUS Technology. Since 2013 we've been a co-located team in Vietnam building operations platforms, integrations, and automation for founders and operators across Australia, the US, and Europe, on products where performance, maintainability, and business alignment actually matter. WHY CLIENTS CHOOSE US - Top Rated Agency on Upwork, 98%+ Job Success Score since 2013, 4.8/5.0 average rating - $10M+ in project value delivered - Long-term partnerships: many clients have worked with us for 5-10+ years - 90+ people co-located: 60+ web developers, 15+ mobile developers, plus QA, BAs, PMs, and designers WHAT WE DO BEST Operations platforms (our core) We design the central system that orchestrates bookings, payments, teams, hardware, and compliance into one seamless operation: software that bends to your process, not the other way around. We handle the integrations Zapier can't and SaaS avoids: deep data synchronization, legacy platforms, and compliance-grade audit trails where failure isn't an option. Everything that supports it - Web: Ruby on Rails (deep expertise, high-traffic systems, complex domains), React, Next.js, Vue.js, TypeScript, Node.js, PHP (Laravel, Symfony), Python (Django, Flask), REST and GraphQL APIs - Mobile: native (Swift, Kotlin) and cross-platform (React Native, Flutter) - Cloud & DevOps: AWS, Google Cloud, Heroku, CI/CD, Docker, monitoring, cost and scale tuning - eCommerce: Shopify (themes, apps, API integrations, migrations), Spree, Saleor, and custom builds HOW WE WORK - Outcome-driven: we focus on business results, not just shipping code - Ownership mindset: we act like a technical co-founder, not a contractor - Proactive: we surface technical debt and scaling bottlenecks before they escalate - Clear communication across time zones (we're GMT+7, with strong overlap for AU and partial US/EU) - Long-term thinking: we build systems that scale, not quick hacks that break later HOW YOU CAN WORK WITH US 1. Operations platform development: internal platforms, SaaS, workflow automation, complex integrations, replacing fragmented tools with a unified system 2. Dedicated engineering teams: backend, frontend, mobile, and QA engineers as an extended team, often for multiple years 3. Product development & MVPs: from idea to launch, fast but not fragile If you're looking for a team that thinks beyond code, challenges assumptions, and builds something that actually lasts, let's talk.

-- Elevate Your Business with Outstanding Robotic Process Automation Services -- • Embark on a transformative journey with me, your premier expert in robotic process automation, where business processes, AI and automation converge to deliver turn-key solutions designed for ease of use and efficiency. - My commitment to excellence - • I work with speed and precision, ensuring timely delivery without compromising on the high standards you deserve. My quick learning ability, meticulous attention to detail, and outstanding communication skills enable me to excel both independently and within team environments. • The code I deliver is not only efficient and organized but also designed with future maintenance in mind. Expect comprehensive documentation, ensuring clarity and ease of use for all stakeholders. • Whether you require .py scripts or executable files, with or without a graphical user interface, for Windows, Linux, or Mac, I deliver customized solutions that meet your specific needs. My software is designed to run seamlessly, even in the system tray to minimize clutter, ensuring a smooth and user-friendly experience. • Fluent in English and French, with basic proficiency in German, Vietnamese, and Spanish, I bring a global perspective to your projects, ensuring effective communication across diverse teams. • My expertise and experience with the following will give you a reason to partner with me: • Python, SQL, Javascript, Rust, N8N, Replit • OpenAI, Google Gemini, Spacy, NLTK, Flask, Openpyxl, FastAPI, Tkinter, Pyside, Pandas, BeautifulSoup, LangGraph, Milvus, Stripe, Paypal, Hugging Face, Chroma, Selenium, Scrapy, Numpy, MatPlotlib, Plotly, Langchain, Python-pptx, Quasar, Vue.js and many other libraries • Google Cloud Platform, AWS, Linux remote admin, VPS deployments • Software architecture and design • Encryption • Reverse Engineering • Contextual RAG development and deployment • MCP development and deployment • Concurrent processing • Should your needs require it, you can rely on me to produce and deploy a custom trained AI model. • Join me in leveraging the power of Python and AI to bring your vision to life with solutions that are not just innovative but truly transformative. My dedication to your success is unmatched, and I am excited to collaborate with you on your next project. Reach out today to start crafting your future success story!

Dear my Precious Client, My name is Nhan Nguyen. I'm a Senior Developer from Soin Media, a premier software outsourcing company dedicated to connecting global enterprises with elite engineering talent. My Job Success Score is 100%. And I'm one of Top Rated Plus freelancers on Upwork. I started my freelancing career in 2009. I've been working on Upwork since 2010. With 128 completed jobs, 2681 paid hours, and more than 18 year experience, I will deliver your website, web application, and mobile application smoothly and satisfactorily. You will be satisfied with the final products, and we will have a comfortable journey together from the beginning to the ending of the project. You can check my working history for previous feedback from my clients. Collaborative, committed to quality, clear communicator, reliable, accountable for outcomes, solution oriented, professional, detail oriented are what clients reviewed me. NodeJS, React, React Native, C#, Kotlin, Swift, Solidity, Rust, AI are my main tools to build your website, web application, and mobile application. We can start our working partnership at 1 of these 3 points: 1. A description of what you want me build for you. I will compose a proposal and a development plan based on your project description. 2. A UI design (in Figma, Canva, Photoshop,...) which has several screens of your website, web application, or mobile application. I will design the other screens for you. 3. An existing website, web application, or mobile application which was abandoned by your previous developer(s). I will pick up what we have and continue the development until we launch your product(s) to the market. Feel free to ask me any question. Even you won't hire me, I'm still happy to advise you and help you to get your project warm-up. Best regards, Nhan Nguyen.

𝐖𝐞 𝐨𝐟𝐟𝐞𝐫 𝐅𝐑𝐄𝐄 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐚 𝐅𝐑𝐄𝐄 𝐪𝐮𝐢𝐜𝐤 𝐫𝐞𝐯𝐢𝐞𝐰 𝐨𝐟 𝐲𝐨𝐮𝐫 𝐩𝐫𝐨𝐣𝐞𝐜𝐭, 𝐚𝐧𝐝 𝐮𝐬𝐮𝐚𝐥𝐥𝐲 𝐫𝐞𝐬𝐩𝐨𝐧𝐝 𝐰𝐢𝐭𝐡𝐢𝐧 𝐚 𝐟𝐞𝐰 𝐡𝐨𝐮𝐫𝐬. We are Teaser Software, an ITO company based in Hanoi, Vietnam. If you’re looking for a reliable team to take your project from idea → design → development → launch → maintenance, while leveraging AI to accelerate development and improve efficiency without compromising quality, you’re in the right place. Whether you already have a detailed specification or just an initial idea, we can help shape it into a clear roadmap with realistic timelines and costs. 𝐋𝐞𝐭’𝐬 𝐜𝐨𝐧𝐧𝐞𝐜𝐭. 𝐉𝐮𝐬𝐭 𝐬𝐞𝐧𝐝 𝐮𝐬 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐚𝐧𝐲𝐭𝐢𝐦𝐞. 𝐖𝐞 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐚𝐜𝐫𝐨𝐬𝐬 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐭𝐢𝐦𝐞 𝐳𝐨𝐧𝐞𝐬, 𝐬𝐨 𝐨𝐮𝐫 𝐭𝐞𝐚𝐦 𝐢𝐬 𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝟐𝟒/𝟕, 𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐰𝐞𝐞𝐤𝐞𝐧𝐝𝐬.

With 20+ years of experience, I build scalable, production-grade applications that are not only ready to launch — but designed to grow, attract users, and support your business long-term. 🎯 Who I work with Startup founders building MVPs SaaS businesses scaling their platforms Companies modernizing legacy systems 🛠️ What I can help you with ✔ End-to-end MVP development From idea validation to architecture, development, and deployment. ✔ Full-stack web development Java, .NET, PHP + modern JavaScript frameworks (React, Vue, etc.) ✔ Scalable backend & API development REST APIs, microservices, and cloud-ready systems (AWS, Azure) ✔ System architecture & consulting Designing systems that scale to thousands (or millions) of users ✔ Performance optimization & refactoring Improve speed, reduce costs, and make your system maintainable 📈 Results I deliver Built 30+ MVPs across different industries Helped startups go from idea → working product → real users Improved system performance by up to 60% in legacy applications Delivered stable, scalable systems ready for growth 💡 How I work Focus on business goals, not just code Communicate clearly and proactively Deliver clean, maintainable, production-ready code Think long-term: scalability, security, and performance 🤝 Why clients choose me I don’t just build features — I help you build the right product. Whether you need to launch fast, fix an existing system, or scale your platform, I bring the experience to guide you from idea to success.

Top 1% on Upwork — Top Rated Plus, 100% Job Success, 5.0★ (100+ reviews). I build production AI agents (LangGraph, RAG, MCP), data pipelines & web scraping. Founder of Van Data Team: 20+ AI products shipped, 9 of them live public platforms, for clients across the US, EU, and APAC. 🚀 WHAT I'VE SHIPPED (live products, real numbers) - Enterprise AI assistant — LangGraph Supervisor routing sub-agents across 70+ MCP tool integrations; web, PWA, iOS & Android from one React codebase - AI cybersecurity platform — fine-tuned Mistral 7B on 424k training samples; Neo4j knowledge graph + RAG - EdTech RAG platform — raised answer accuracy from ~80% to 95%+ (pgvector, LangChain, Claude) - Multi-tenant enterprise AI suite — 5-agent architecture with persistent memory, running at 94.7% platform health - Sales-KPI AI dashboard — cut LLM cost by 92% with Claude Haiku - My own SaaS — multi-tenant AI content agents, personalized per tenant (live product, see Portfolio section) 💬 AI AGENTS, CHATBOTS & LLM APPS (Full-Stack) - AI Agent Development: autonomous agents with tool calling, multi-step reasoning, and decision-making (LangGraph, LangChain, MCP) - Multi-Agent Systems: supervisor patterns, agent-to-agent communication, task delegation - AI Chatbots: customer-service bots, document Q&A, and conversational AI grounded in your business data (RAG, no hallucinations) - Custom MCP servers: turn your internal tools into capabilities for Claude, Cursor, and other LLM clients - Models & APIs: Claude (Anthropic), GPT-4/4o (OpenAI), Gemini, DeepSeek, Llama 3, Hugging Face; AWS Bedrock, Azure OpenAI, Vertex AI - Vector databases: Pinecone, Milvus, ChromaDB, pgvector, FAISS + Neo4j graphs - Observability & evals: LangSmith, Langfuse; fine-tuning for domain-specific tasks - Frontend: Next.js, React, TypeScript, Tailwind — Backend: FastAPI, Flask, Django, NestJS, Node.js/Express, GraphQL Perfect for: support automation, sales chatbots, document Q&A, intelligent search, business-process automation. ⚡ DATA ENGINEERING & ETL PIPELINES Production infrastructure processing millions of records: - Pipelines: Apache Spark, Airflow, Dagster, dbt • Streaming: Kafka - Batch: AWS Glue, Google Dataflow, Azure Data Factory - Warehouses: BigQuery, Snowflake, Redshift, Athena — optimized schemas, HIPAA-style audit & lineage - Zero-downtime migrations to cloud warehouses 🕷️ WEB SCRAPING & DATA EXTRACTION - Platforms: Facebook, TikTok, LinkedIn, Shopify, HubSpot, QuickBooks, SaaS portals - Tools: Scrapy, Playwright, Selenium, Puppeteer, BeautifulSoup, Crawl4AI - Anti-bot: Cloudflare, CAPTCHA, rate limiting — solved with proxy rotation & monitoring - Output: clean CSV/JSON, SQL databases, or a ready-to-use API ☁️ CLOUD & DEVOPS AWS (Lambda, ECS Fargate, Glue, Athena, Redshift, SQS, EventBridge, EMR) • GCP (BigQuery, Cloud Run, Dataflow, Dataproc) • Azure (Data Factory, Databricks) • Docker, Kubernetes, Terraform, GitHub Actions & GitLab CI/CD • Monitoring: CloudWatch, Datadog, Prometheus, Grafana ✅ WHY CLIENTS PICK ME - Founder-led, senior-only execution — you work with me directly, no agency layer - AI-native workflow (Claude Code, Cursor, Copilot): 2–3x faster delivery, production quality - 6+ years across AI engineering, data engineering, and full-stack development - End-to-end ownership: architecture → code → deployment → monitoring - Clear communication: regular updates, transparent workflow, overlap with US/EU hours Let's build your AI solution — send an invite or message me, and I'll reply with a concrete plan within hours.

👨‍💻 I build production-ready AI systems, not just demos. With 10+ years in software development, I specialize in turning AI ideas into real, scalable products used by actual users. From MVP to full systems, I focus on performance, reliability, and business impact. 👉 Website: ai-research.dev 1. What I do 1.1. AI Systems & Automation Build intelligent systems using RAG, LLMs, and vector databases for search, chat, and workflow automation. Designed to reduce manual work and improve efficiency. 1.2. AI SaaS & MVP Development Turn ideas into working AI products in weeks. Focus on core features that deliver real value, then scale to production. 1.3. Full-Stack Development End-to-end development across frontend, backend, and infrastructure. Clean architecture, scalable design, and production-ready code. 1.4. Backend & APIs High-performance APIs and systems built for reliability, security, and real-world usage. 2. Tech Stack - AI & LLMs: OpenAI, Claude, Ollama, LangChain, LlamaIndex - Vector Databases: Qdrant, Pinecone, Weaviate, pgvector - Automation & Agents: n8n, Make, Zapier - Backend: FastAPI, Node.js (NestJS, Express), Laravel - Frontend: React, Next.js, Tailwind - Mobile: React Native 👉 I design for production from day one 👉 I combine AI + full-stack + system architecture 🚀 If you’re looking to build an AI product that actually works in production, let’s talk.