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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’m a Chrome extension developer who has been in the trenches for years. I survived the COVID era, the brutal Chrome Manifest V2 → V3 migration that wiped out thousands of extensions, and I’m still here — building, shipping, and maintaining powerful tools used by thousands of people. Built my own house by building a bunch of browser extensions over the years, thank you and love you, my clients! If you need someone who can design, build, scale, and maintain complex Chrome extensions, you’re in the right place. ✅Featured Products: ⭐ 𝐎𝐫𝐢𝐠𝐢𝐧𝐚𝐥𝐢𝐭𝐲𝐀𝐈 𝐀𝐈 𝐂𝐨𝐧𝐭𝐞𝐧𝐭 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐨𝐫 (20000+ users) ⭐ 𝐀𝐮𝐭𝐨 𝐅𝐨𝐥𝐥𝐨𝐰 𝐔𝐩 𝐈𝐭! ⭐ 𝐀𝐮𝐝𝐢𝐨 𝐁𝐫𝐚𝐢𝐧 𝐅𝐨𝐜𝐮𝐬 ⭐ 𝐄𝐚𝐫𝐧 𝐀𝐥𝐥𝐢𝐚𝐧𝐜𝐞 𝐂𝐨𝐦𝐩𝐚𝐧𝐢𝐨𝐧 ⭐ 𝐈𝐝𝐞𝐧𝐭𝐢𝐭𝐲𝐂𝐡𝐞𝐜𝐤 ⭐ 𝐒𝐢𝐭𝐞𝐣𝐚𝐛𝐛𝐞𝐫 ⭐ 𝐃𝐨𝐰𝐧𝐥𝐨𝐚𝐝 𝐀𝐦𝐚𝐳𝐨𝐧 𝐢𝐦𝐚𝐠𝐞𝐬 ⭐ 𝐒𝐨𝐜𝐢𝐚𝐥 𝐏𝐨𝐬𝐭 𝐌𝐚𝐭𝐞 ✅ Skills ⭐ JavaScript expert (with a serious love for jQuery) ⭐ Google Cloud Platform APIs – Google Sheets, BigQuery, Gmail, and more ⭐ Firebase – Authentication, Firestore, Realtime Database, Cloud Functions ⭐ Supabase services and integrations ⭐ AI integrations – OpenAI API and Google Gemini ⭐ Payment systems – ExtensionPay, Gumroad, Lemon Squeezy, Zoho Billing ⭐ LinkedIn & LinkedIn Recruiter scraping and exporting data to external platforms ⭐ Custom ad injection within Google search results ⭐ Amazon automation & scraping – Amazon storefronts and Seller Central ⭐ Email productivity tools – Gmail tracking and automated follow-up emails that work even while I’m sleeping!

⏰ Available 24/7 – Long-term & High-impact Projects Hi, I’m Nghi, a Senior Data Engineer and Data Architect with a strong backend foundation, now focused on building high-performance analytics platforms, explainable data pipelines, and production-grade cloud architectures. I help companies transform unreliable, slow, or opaque data systems into scalable, well-documented, and business-trustworthy platforms. 🧠 WHAT I SPECIALIZE IN 🏗️ Data Architecture & Platform Design - Designing modern lakehouse & warehouse architectures - dbt-first analytics engineering with testing, freshness & lineage - Event-driven and batch hybrid pipelines - Data quality frameworks & SLA monitoring - Customer-facing data explainability systems Tools: dbt, Dagster, Airflow, Spark, Kafka, Snowflake, BigQuery, Redshift, PostgreSQL, DuckDB, ClickHouse ⚡ Database Performance Engineering - If your queries are slow, costs are high, or dashboards lag, This is my zone - Query plan analysis & index strategies - Warehouse cost optimization (Snowflake, BigQuery, Redshift) - OLTP & OLAP performance tuning - High-concurrency workload design 🔄 Reverse ETL & Operational Analytics - Syncing analytics back to CRMs & internal tools - Building real-time metrics pipelines - Feature-store style transformations 🕷️ Enterprise-grade Web Data Extraction - I don’t just scrape pages, I build durable data acquisition systems: - Complex ASP.NET, JS-heavy, authenticated & paginated systems - Anti-bot bypassing & failure-recovery pipelines - Headless browser automation + async scraping - Real-estate, finance, campaign-finance & marketplace platforms ☁️ Cloud Infrastructure - AWS | Azure | GCP - EMR / Dataproc / Glue / Dataflow / Synapse / BigQuery / Redshift - Terraform-based deployments - Cost-aware architectures - Kubernetes + Dockerized data services 🧪 What You Get Working With Me ✔️ Production-ready pipelines ✔️ Clean, testable dbt models ✔️ Well-documented architecture diagrams ✔️ Transparent data logic for non-technical stakeholders ✔️ Systems that scale beyond MVP ✔️ Honest advice and not over-engineering 🏆 Ideal Projects 👍 Data warehouse migrations 👍 Broken pipelines that need debugging & stabilization 👍 Analytics platforms that lack trust or explainability 👍 Performance bottlenecks costing thousands per month 👍 Long-term data platform ownership ❣️ Why Clients Stay Long-Term 🍀Clear communication 🍀 Business-first thinking 🍀 No black-box systems 🍀 I build systems others can maintain 🇻🇳🇻🇳🇻🇳🇻🇳 If your data platform feels fragile, slow, or impossible to explain to customers, I can fix that. Let’s make your data system something you can confidently stand behind.

Experienced Analytics Leader with a demonstrated history of working in various startups and corporate including Grab and Nestle' . Skilled in building and training Data Analytics team, Business Intelligence, Python (Programming Language), Strategy, MS Suite. Strong research professional with a Master of Science (MS) focused in International Business from Hult International Business School.

A data enthusiast - with more then 3 years experience working on data analysis, business intelligence,

With over 4+ years of experience, I have worked with top-tier brands such as Cosco Wholesale, FPT, Airbus, delivering scalable, secure, and high-performance solutions. I specialize in data engineering, analytics, AI/ML, and LLM-powered solutions, focusing on building robust ETL pipelines, optimizing data workflows, and ensuring seamless data integration across platforms. My expertise spans cloud-native, serverless, and microservices architectures. For LLM I have deep expertise in LangChain/LangGraph, Prompt Engineering, ChatGPT APIs, GPT Models, RAGs, Vector Databases and AI orchestration frameworks. I have extensive hands-on experience in data engineering, working with tools like Apache Airflow, Talend, AWS Glue, dbt, and Spark for ETL and large-scale data processing. I have designed and optimized data lakes and warehouses on GCP, AWS and Azure, leveraging PostgreSQL, MySQL, MongoDB, and Cassandra for structured and unstructured data. My expertise includes real-time data streaming with Pub/Sub, Apache Kafka and Kinesis, ensuring high availability and performance. I also specialize in AI/ML-driven data automation, leveraging LLMs for intelligent processing. My visualization expertise spans Looker Studio, Power BI, Tableau, and Grafana, enabling the creation of insightful, data-driven dashboards. With strong DevOps knowledge, including CI/CD, Docker, Terraform, and cloud infrastructure automation, I ensure scalable and optimized deployments. I am ready to start immediately and happy to discuss how my expertise can support your project.