I help businesses build production-ready AI agent systems — from autonomous LangGraph pipelines to multi-agent architectures that actually ship to production. If you need someone who can both architect the system AND write the code — you're in the right place. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤖 WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ Multi-Agent Systems — LangGraph, LangChain, AutoGen, CrewAI, Claude SDK Complex agent networks with memory, planning, tool use, and human-in-the-loop control. I design the graph, define agent roles, build the tool layer, and deploy it. ✅ RAG & Knowledge Pipelines — vector DBs, hybrid search, GraphRAG From document ingestion to production-grade retrieval: Qdrant, Chroma, Weaviate, Neo4j, OpenSearch. Including re-ranking, metadata filtering, and evaluation pipelines. ✅ LLM Automation & AI Workflows — n8n, custom orchestration, API integrations End-to-end automation: trigger → agent → tool → output. Whether it's an AI SDR, a research pipeline, or a document processor — I build it clean and maintainable. ✅ Data Engineering for AI Products — ClickHouse, Kafka, Spark, dbt Real-time and batch data pipelines that feed your AI systems. Data Lakes, Data Lakehouses, GenBI (NL → SQL → dashboards), observability. ✅ AI Product Development — from prototype to deployed SaaS Python backend, FastAPI, Docker, AWS/GCP, CI/CD. I don't just build proof-of-concepts — I bring them to production. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📌 REAL PROJECTS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔸 AI EdTech SaaS — 10-Agent Pipeline Built a fully automated course generation system: user inputs a topic → 10 specialized agents handle research, curriculum design, content writing, code generation, and video script creation. Output: a full course in under 30 minutes. Stack: LangGraph, Claude API, Python, FastAPI, AWS. 🔸 GenBI System — Natural Language → Business Intelligence Deployed at a Fintech company: users ask questions in plain English → system generates SQL → runs on ClickHouse → pushes to Grafana → VLM analyzes charts and sends alerts. Reduced analyst workload by 60%. Stack: LangChain, ClickHouse, Grafana, GPT-4o, Python. 🔸 AI Engineer Bootcamp — 300+ Students Not just a practitioner — I teach what I build. Created a comprehensive course on AI agents, RAG, and LLM engineering with 300+ enrolled students on Udemy. This means I explain systems clearly, write clean code, and document everything properly. 🔸 Multi-Agent Research Assistant Built an autonomous research agent: given a business question, it orchestrates 5 sub-agents to search the web, read documents, synthesize findings, and produce a structured report. Latency under 45 seconds. Stack: LangGraph, Tavily, Claude 3.5, Python. 🔸 AI Streamer & Real-Time Content Pipeline Developed a real-time AI content generation system with character animation, voice synthesis, and live streaming capabilities. Combines LLMs, TTS, and video generation into one automated pipeline. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ LLMs & Agents: LangGraph · LangChain · AutoGen · CrewAI · Claude SDK (Anthropic) · OpenAI API · Ollama · OpenRouter · MCP (Model Context Protocol) RAG & Vector DBs: Qdrant · Chroma · Weaviate · FAISS · Neo4j · GraphRAG · LlamaIndex Data Engineering: ClickHouse · Apache Kafka · Apache Spark · dbt · Airflow · PostgreSQL Infrastructure: Python · FastAPI · Docker · AWS · GCP · GitHub Actions · n8n ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 👤 WHY WORK WITH ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → 10+ years of engineering experience — no junior mistakes → I've shipped AI products, not just prototypes → I think in systems: architecture, edge cases, observability, cost → Teaching background means clear communication and solid documentation → I'm honest about what's possible — no overpromising ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ If you're building an AI agent system, automating a business workflow with LLMs, or need a data pipeline that powers your AI product — let's talk. Send me a message with your project details and I'll respond within 24 hours.

Experienced Big Data Developer, Java with a demonstrated history of working in the telecommunications industry. Skilled in Angular, SQL, Spring Boot, PHP, Java, Big Data, and Spring Framework. Strong engineering professional with a Bachelor's degree focused in Information Technology from Hanoi University of Agricalture.

Data Engineer with 18+ years of experience in big data development and production environments Proven skills in Data Pipeline design, development and implementation with a focus on highly-scalable systems Well-versed in various programming languages, including SQL and Python ● Programming languages: Python, SQL ● AWS Services: S3, EC2, Glue, EMR, MWAA ● Data Warehousing: Snowflake, Redshift, Athena ● Database Management: MySQL, PostgreSQL, Oracle, ● Modern Data Stack: Fivetran, Hevo, DBT, Matillion, Atlan, DLTHUB ● BI Tools: Tableau, Power BI ● Orchestration: Airflow ● CI/CD: Jenkins, GitHub

I’m a Backend Software Engineer with 2+ years of experience building scalable, high-performance enterprise applications at American Express. I specialize in Java, Spring Boot, REST APIs, microservices, and distributed systems, helping businesses develop secure, reliable, and maintainable backend solutions. Throughout my experience in both the Marketing and TOCK Global Dining teams at American Express, I’ve designed and implemented backend services, integrated with enterprise APIs, optimized database performance, modernized legacy applications, and automated CI/CD pipelines. My technical stack includes Java 21, Spring Boot, Guice, gRPC, REST APIs, SQL, MariaDB, HBase, Hive, Kafka, Docker, Kubernetes, GitHub Actions, Jenkins, JUnit, Mockito, OpenTelemetry, Datadog, and Splunk. I enjoy solving complex backend challenges, improving system performance, and delivering clean, well-tested code that scales. Whether you need a REST API, microservice, backend integration, bug fixing, performance optimization, or a complete backend solution, I’m committed to delivering high-quality work with clear communication and on-time delivery. Let’s build something great together!

I’m a Data Engineering Professional with 4+ years of experience delivering innovative, scalable, and efficient solutions for complex data challenges. My expertise spans Big Data, Data Warehousing, Cloud Computing, and Data Analytics, ensuring seamless ETL pipelines and actionable insights for clients worldwide. 🌟 My Mission: To help businesses leverage data for smarter decisions, optimized workflows, and measurable results. 🛠️ Core Competencies 📊 Big Data & Data Engineering Proficient in Apache Spark, Hadoop, MapReduce, Hive, Kafka, Airflow, and Snowflake. Real-time and batch data processing expertise using Spark Streaming and Flink. Skilled in tools like Presto, Cloudera Manager, StreamSets, and Zookeeper. ☁️ Cloud Platforms AWS: EC2, S3, RDS, EMR, Redshift, Lambda, Glue, Kinesis, Athena. Azure: Azure Databricks, Synapse Analytics, Data Factory, Data Lake. GCP: BigQuery, Dataflow, and other scalable services. 📈 Data Visualization & Business Intelligence Expertise in crafting dashboards with Tableau, Power BI, and Grafana for actionable insights. 💾 Databases Mastery of SQL and NoSQL databases, including SQL Server, PostgreSQL, MongoDB, Cassandra, and HBase. 💻 Programming & DevOps Advanced coding skills in Python, Scala, and Java for ETL workflows and automation. Experience with Docker, Kubernetes, and other DevOps tools for smooth deployment. 🌟 Why Choose Me? ✅ Proven Track Record Successfully designed and implemented end-to-end pipelines, processing massive datasets with exceptional performance. ✅ Cloud Expertise Extensive hands-on experience with AWS, Azure, and GCP, ensuring cost-effective and scalable solutions. ✅ Business-Driven Solutions Focused on aligning technical implementations with your business goals to maximize value. ✅ On-Time Delivery Reliability and adherence to deadlines without compromising quality. 💼 Let’s Collaborate! Looking for a dedicated, detail-oriented, and highly skilled Data Engineer to transform your data strategies? Let’s connect and build your next data-driven success together! 📬 Contact Me Today to discuss how I can add value to your projects.

Software Developer skilled in Python and OOP, with experience in building microservices, RESTful APIs, and scalable backend solutions using Django, FastAPI. Proficient in AWS (ECS, EKS, EC2), Docker, Kubernetes, and CI/CD pipelines. Strong background in cloud migration, automation, and database management with PostgreSQL, MySQL, MongoDB, and HBase, working in Agile/Scrum environments to deliver reliable and efficient software solutions. Over the past few years, I've: Automated end-to-end ordering, charging, and invoicing processes, reducing manual effort by 40%. Developed cloud migration solutions for billing products, improving deployment efficiency. Optimized automation scripts and CI/CD pipelines using Python, Jenkins, and Shell scripting. Debugged and monitored large-scale telecom systems using Elastic Kibana, improving system reliability.

I bring a unique blend of creativity and technical expertise, starting with a background in media pedagogics that introduced me to the fundamentals of programming. My passion for technology grew as I developed websites for cultural events and social projects, leading to a deep dive into DevOps and data engineering through self-education and evening school programs. Over the years, I’ve built a strong track record of designing, implementing, and managing scalable, cloud-based infrastructures and data pipelines. My experience spans cloud platforms (AWS, Azure, GCP), containerization (Docker, Kubernetes), CI/CD pipelines (Jenkins, Ansible, CircleCI, TravisCI), and data science frameworks (TensorFlow, Pandas, scikit-learn). I am proficient in automation tools (Terraform, CloudFormation) and monitoring systems (Prometheus, Grafana, Nagios) to ensure robust, high-performing environments. Key areas of expertise include: Infrastructure as Code (IaC): Automating deployments with Terraform and CloudFormation Cloud Architecture: Expertise in AWS services like ECS, Lambda, S3, DynamoDB, SageMaker, and more Service Mesh & Orchestration: Proficient in Istio, Linkerd, Consul for microservices management Data Engineering & AI: Building data pipelines, analysis tools, and AI-driven solutions using Python, Go, and Node.js Database Management: Skilled in GraphQL, MongoDB, PostgreSQL, and Redis Web Development: Flask, Django, and Vue.js for full-stack solutions I excel at simplifying complex technical problems, optimizing systems for high performance, and delivering innovative, scalable solutions that meet business needs. Whether it’s building trading tools, AI-driven chatbots, or handling massive data streams, I bring dedication, adaptability, and a constant drive for improvement to every project. *** Technical Stack *** *. Cloud Platforms & Services AWS: ECS, Lambda, S3, DynamoDB, SageMaker, AppSync, CodeDeploy, SQS, ECR, Fargate, SAM, EKS, Lightsail, EC2, Athena, EMR, Kinesis, Firehose, Flink, Redshift, VPC, CodePipeline, Rekognition, Cognito, Macie, IAM, WAF Azure: Azure Functions, Azure DevOps, Azure Monitor, Azure Kubernetes Service (AKS) GCP: Compute Engine, Kubernetes Engine, Cloud Storage, BigQuery *. DevOps & Automation CI/CD Tools: Jenkins, Ansible, CircleCI, TravisCI, CodePipeline, Spinnaker Infrastructure as Code (IaC): Terraform, AWS CloudFormation Configuration Management: Ansible, Chef, Puppet Monitoring & Logging: Prometheus, Grafana, Nagios, Zabbix, Datadog, Kibana, Filebeat *. Containerization & Orchestration Containerization: Docker, Docker Swarm Orchestration: Kubernetes Service Mesh: Istio, Consul, Linkerd *. Data Science & Machine Learning Frameworks: TensorFlow, Keras, scikit-learn Libraries: NumPy, Pandas, Matplotlib, Seaborn ML Ops: SageMaker, Data Pipelines, Model Deployment *. Programming Languages Python, Go (Golang), Node.js, Bash *. Databases PostgreSQL, MongoDB, Redis, GraphQL, HBase, Elasticsearch *. Web Development Frameworks Flask, Django, Vue.js *. Message Queues & Event Streaming RabbitMQ, Kafka, SQS, Redis Streams *. AI & Automation Tools AI Bots, Chatbots, LLM (Large Language Models) Test Automation: Selenium, PyTest, Robot Framework, PyUnit

English: Intermediate Strong (B1+) Professional Summary I have been working as an AQA/SET Engineer for about 5 years. Was working on various projects with different domains and tech stacks such as Big Data, IoT, and Marketplace. Besides, have Leading experience where was responsible for writing test strategy, code base, and setting up CI/CD process. Also have the following experience: * Testing of microservice architecture (AWS, Azure) * Testing IoT * Experience in ETL job testing * DB migration * Experience with various CI/CD tools (Azure DevOps, GitLab CI, Jenkins)

I'm a tech professional with 20+ years in IT and over 8 years in backend leadership roles, currently working on Ukrainian army digitalization. I bring a strong combination of software engineering and DevOps mindset, having worked in multiple startups and corporates where I not only built backend systems but also automated deployments, optimized infrastructure, and set up CI/CD pipelines to save teams time and reduce friction. I’ve delivered solutions for top-tier clients like Barclays, Bridgewater, Emotive, and Helu, working across product and outsourcing companies in the banking, fintech, and data processing domains. 🔹 What I bring to the table: - Python (FastAPI, Django) - Scalable backend architecture & microservices - Data processing pipelines - PostgreSQL, MySQL, MongoDB - CI/CD automation with GitHub Actions, serverless deployments - Infrastructure as Code with Terraform - Cloud experience: AWS, DigitalOcean - Team leadership, mentoring & process improvement Outside of work, I enjoy teaching Python and building messenger bots and automation tools. Now that I have some extra availability, I’m here on Upwork to partner on impactful projects — where I can write clean code, automate delivery, and help teams move faster and smarter. Let’s connect and build something great.

I am a senior software developer with 10 years of experience in Java development, specializing in Java programming and architecture design. I am proficient in technologies such as Spring Boot, Spring Cloud, and MyBatis, and familiar with data processing tools like Elasticsearch, Kafka, Redis, and ClickHouse. Additionally, I have extensive experience in data monitoring, analysis, and visualization.