I build AI-powered web applications, personalized chatbots for businesses, scalable data pipelines, and intelligent automation systems. Specialized in LangChain, RAG, Next.js, FastAPI, and cloud deployment.
๐ฌ AI Web & App Development (Full-Stack)
Custom AI chatbots and intelligent web applications for SMBs:
- AI Chatbots: Personalized customer service bots, knowledge bases, and conversational AI using LangChain, LangGraph, and RAG
- AI Agent Development: Build autonomous AI agents with tool calling, multi-step reasoning, and decision-making capabilities
- Multi-Agent Systems: Agent-to-agent communication for complex workflows, task delegation, and collaborative problem-solving
- Personalized AI for SMBs: Custom AI solutions trained on your business data, documents, and knowledge base for intelligent automation
- Frontend: Next.js, React.js, TypeScript with modern, responsive UI design
- Backend: FastAPI, Flask, Django, Node.js Express for high-performance APIs
- Vector Databases: Pinecone, Milvus, ChromaDB for semantic search and intelligent retrieval
- AI Tools: Claude Code, Cursor IDE, GitHub Copilot for rapid development
- Deployment: AWS, GCP, Azure, Digital Ocean with Docker and Kubernetes
- Methodologies: Agile Scrum and Waterfall development workflows
Perfect for: Customer support automation, sales chatbots, document Q&A, intelligent search, business process automation
โก Data Engineering & ETL Pipelines
Production data infrastructure processing millions of records:
- Pipelines: Apache Spark, Airflow, Dagster for automated ETL workflows
- Streaming: Kafka for real-time data processing and event-driven systems
- Batch Processing: AWS Glue, Google Dataflow, Azure Data Factory
- Data Warehouses: BigQuery, Redshift, Snowflake with optimized schemas
- Transformations: DBT models for data quality and business logic
- Migration: Zero-downtime database migrations to cloud warehouses
๐ค AI & LLM Integration
Production-ready AI systems with cutting-edge models:
- LangChain: Build agents, workflows, and chains with LangGraph automation
- RAG Systems: Vector embeddings and semantic search for intelligent retrieval
- Models: Claude (Anthropic), GPT-4 (OpenAI), DeepSeek, Llama 3, Hugging Face
- Observability: LangSmith and Langfuse for monitoring and debugging
- APIs: AWS Bedrock, Azure OpenAI, Anthropic Claude integration
- Fine-tuning: Custom model training for domain-specific tasks
Use Cases: AI chatbots, document analysis, content generation, automation
๐ท๏ธ Web Scraping & Data Extraction
Extract structured data from complex websites:
- Platforms: Facebook, TikTok, LinkedIn, Shopify, HubSpot, QuickBooks, SaaS platforms
- Tools: Scrapy, Playwright, Selenium, Puppeteer, BeautifulSoup, Crawl4AI
- Anti-Bot: Resolve Cloudflare, Captcha, rate limiting with proven techniques
- Automation: Scheduled scraping with monitoring and proxy rotation
- Output: Clean CSV, JSON, SQL databases, or API integration
โ๏ธ Cloud Architecture & DevOps
Scalable cloud infrastructure and deployment:
- AWS: Lambda, ECS Fargate, Glue, Athena, Redshift, EventBridge, SNS, SQS, EMR
- GCP: BigQuery, Cloud Run, Dataflow, Dataproc, Cloud Storage, Firestore
- Azure: Data Factory, Power BI, Databricks, Blob Storage, Cosmos DB
- DevOps: Docker, Kubernetes, Terraform, GitLab CI/CD, GitHub Actions
- Monitoring: CloudWatch, Datadog, Prometheus, Grafana
๐ป Core Technologies:
- AI & ML: LangChain, LangGraph, OpenAI API, Claude API, DeepSeek, Llama, Hugging Face, RAG, vector embeddings, AI agents, multi-agent systems
- Frontend: Next.js, React.js, TypeScript, Tailwind CSS
- Backend: FastAPI, Flask, Django, Node.js, Express.js, GraphQL
- Databases: Pinecone, Milvus, ChromaDB, PostgreSQL, MySQL, MongoDB, Redis, Elasticsearch, Neo4j, DynamoDB
- Big Data: Apache Spark, Kafka, Hadoop, Hive, Airflow, Dagster, DBT
- Scraping: Scrapy, Playwright, Selenium, Puppeteer, Crawl4AI
- Cloud: AWS, GCP, Azure, Digital Ocean
- DevOps: Docker, Kubernetes, Terraform, Git, CI/CD
- Languages: Python, SQL, JavaScript, TypeScript, R, Java, Bash
- Tools: Claude Code, Cursor, GitHub Copilot
- Management: Agile, Scrum, Waterfall, JIRA, Trello
โ Why Hire Me:
- Fast Delivery: AI-assisted development for 2-3x faster results
- Production Quality: Clean, documented, maintainable code
- Top Rated Plus: 100% Job Success Score, 5+ years experience
- Full-Stack: Handle frontend, backend, database, and deployment
- Clear Communication: Regular updates and transparent workflow
Let's build your AI solution. Message me to discuss your project!
Web Scraping
Generative AI
Machine Learning
Full-Stack Development
Data Engineering
LangChain
Next.js
FastAPI
Apache Spark
AWS Lambda
Retrieval Augmented Generation
Vector Database
AI Chatbot
Python
Docker
Nguyen Hoang T.
Long Thanh, Vietnam
$15/hr
5.0
12 jobs
I build and stabilize production automation systems and data pipelines for e-commerce and AI workflows. I don't just write scripts; I engineer reliable systems that handle real-world constraints: anti-bot, rate limits, API failures, and strict data validation.
What I deliver:
โข System Stabilization & n8n/AWS Automation: Diagnosed and fixed a failing 5kโ8k SKU e-commerce sync. Implemented retry logic, EC2 lifecycle control, and eBay API error handling. System now runs daily without crashes.
โข Targeted Data Pipelines for AI/RAG: Built bounded retrieval systems to extract, verify, and structure policy documents (PDF + web) from 1,500+ domains. Delivered clean JSON corpus with provenance tracking, rate limiting, and strict validation.
โข Strict Data Transformation & ETL: Engineered bidirectional JSON โ ASCII converters with round-trip safety and schema alignment. Handles complex business logic without data loss.
My working style:
- Fixed scope, clear milestones. I provide a technical audit/demo before full commitment.
- Production-ready code: logging, error handling, documentation, and handover support.
- Honest scoping: I'll tell you upfront what's feasible and what isn't.
Tech: Python, n8n, AWS (EC2), eBay API, Supabase/PostgreSQL, Playwright/Selenium, JSON/ASCII ETL, CLI tools.
English & Vietnamese fluent. Reply within 1 hour.
Web Scraping
Web Scraping Framework
Data Extraction
Script
Scripting
Ecommerce
Python
Selenium
Web Scraping Software
n8n
AWS Cloud9
eBay API
Supabase
API Integration
Data Processing
Make.com
Microsoft Excel
Automation
JavaScript
Google Sheets Automation
Henry B.
Hcm, Vietnam
$12/hr
4.9
145 jobs
I'm Henry, a Senior Full-Stack Web Developer & Web Scraping Specialist with 10+ years of professional experience building high-performance web applications, automation tools, and scalable data solutions. I help businesses transform ideas into reliable, efficient, and maintainable software.
What I can help you with:
๐ Full-Stack Web Development
- Backend: Python (Django, Flask, FastAPI, Celery), Node.js, PHP
- Frontend: React.js
- Secure, scalable, and maintainable web applications
๐ RESTful API Development & Integration
- Django REST Framework (DRF)
- FastAPI
- Express.js (Node.js)
- Amazon API Gateway
- Third-party API integrations and custom API design
๐ธ๏ธ Web Scraping & Data Engineering
- Custom web scraping and crawling solutions
- Automated data extraction from complex websites
- ETL pipelines and data processing
- Large-scale, reliable scraping infrastructure
โ๏ธ Automation & Workflow Optimization
- Python scripting
- Task automation
- Business process automation
- Performance optimization and system integration
I take pride in writing clean, well-documented, and maintainable code while maintaining clear communication throughout every project. My goal is to deliver solutions that are reliable, scalable, and aligned with your business objectives.
Whether you need a modern web application, a robust backend API, an advanced web scraper, or an automation solution, I'm ready to help bring your ideas to life.
Thank you for visiting my profile. I look forward to working with you!
Best regards,
Henry
Scrapy
Python
Scripting
Data Scraping
Web Crawling
API Development
Django
Tai L.
Ho Chi Minh City, Vietnam
$25/hr
5.0
31 jobs
๐ Welcome to My Profile! ๐
I am a Software Engineer with 5+ years of experience in software development. My expertise spans Python, .NET, C#, SQL Server, Node.js, Vue.js, and React.js, and I am committed to delivering high-quality solutions tailored to your needs.
๐น My Services:
โ Website Development ๐
โ Automation Development โ๏ธ
โ AI Integration ๐ค
โ Web Scraper Development ๐ต๏ธโโ๏ธ
โ Discord Bot Development ๐ค
โ Telegram Bot Development ๐ฉ
โ AI Application Development ๐ง
โ Windows Application Development ๐ฅ๏ธ
โ Unity Game Development ๐ฎ
โ CI/CD Pipeline Setup ๐
โ Version Control (Git, SVN) ๐๏ธ
๐ก Let's collaborate and bring your ideas to life! Feel free to reach out. ๐
Web Scraping
Data Extraction
.NET Framework
Vue.js
ASP.NET Web API
API Development
API
ASP.NET Core
Python
Automation
ChatGPT API
Vy P.
Ho Chi Minh City, Vietnam
$20/hr
5.0
5 jobs
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.
Scrapy
Data Engineering
dbt
BigQuery
Apache Airflow
Microsoft Power BI
Looker Studio
Python
SQL
Google Cloud Platform
Selenium
Amazon Web Services
Microsoft Azure
Vertex AI
Thien V.
Hanoi, Vietnam
$20/hr
5.0
1 jobs
Need to automate your workflow or build a smart AI Agent? I deliver fast, clean, and efficient Python & AI solutions.
โI am a developer specializing in bridging the gap between manual work and smart automation. Whether you need a sophisticated AI Agent using OpenAI/LangChain or a robust web scraper to extract data, I can help you save hours of work.
โWhat I can do for you:
โAI Agents: Custom GPTs and AI-powered chatbots using LangChain and OpenAI API.
โAutomation Tools: Python scripts to automate browser tasks, Google Sheets, or social media.
โWeb Scraping: Extracting complex data from various platforms into Excel/CSV.
โWeb Development: Quick bug fixes (HTML/CSS/JS) and API integrations.
โI focus on the final result and clear communication. I am available to start immediately and dedicated to helping your business grow with automation.
โLetโs chat to discuss your requirements!
Artificial Intelligence
Scripting
Mobile App
Web Development
Web Application
Script
International Development
Product Development
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