# Chaleampol Treeboon (Teelek)

> Senior Full-Stack Engineer (DevSecOps & AI Integration) based in Samut Prakan, Thailand, with 12+ years of experience in the C# .NET ecosystem. Has delivered 25+ projects on-premise and in the cloud (Azure, AWS) and specializes in system modernization, cloud-native delivery, and AI integration.

Thai name: เฉลิมพล ตรีบุญ (ตี๋เล็ก). This file summarizes the public portfolio at https://cv.teelek.me/ for language models and AI answer engines. The portfolio page and the English resume PDF are the source of truth.

## Profile

- [Portfolio (HTML)](https://cv.teelek.me/): full summary, skills, experience, projects, education, and contact form
- [Resume (PDF, English)](https://cv.teelek.me/Chaleampol_Treeboon_Senior_Full_Stack_Engineer_DevSecOps_and_AI_Integration_Resume_EN.pdf): downloadable resume
- [LinkedIn](https://www.linkedin.com/in/chaleampol-treeboon): professional profile
- [Teelek.me](https://teelek.me): personal website

## Summary

- Designs and builds end-to-end systems covering upgrades, migrations, and new implementations
- Owns the full lifecycle, from requirement gathering, system analysis and design, and prototypes to SIT, UAT, security testing, and go-live
- Uses manual and automated CI/CD across on-premise, Azure, and AWS environments

## Core skills

- Backend: C#, .NET, .NET Core, .NET Framework, ASP.NET Core, ASP.NET MVC, RESTful API design, OData, .NET Worker Service
- Frontend: HTML5, CSS3, JavaScript (ES5, ES6+), jQuery, AJAX, AngularJS, Vue.js
- Databases: SQL Server, PostgreSQL, Oracle, MySQL, MongoDB
- Architecture: Monolithic, Microservices, 3-Tier, Event-Driven Architecture, asynchronous processing, API Gateway, RabbitMQ, Dependency Injection, Repository, Unit of Work
- Cloud & DevOps: Microsoft Azure, AWS, Docker, Linux/Ubuntu, Windows Server/IIS, Jenkins, GitLab CI/CD, GitHub Actions, Traefik/Cloudflare, Azure API Management, Azure Container Apps
- Auth & Security: OAuth 2.0, OpenID Connect (OIDC), Active Directory, JWT, PKCE, Auth0/Keycloak, Azure Key Vault
- Testing: Playwright (E2E), xUnit, Moq, Testcontainers, Postman/Newman
- AI: OpenAI ChatGPT and Gemini APIs, FlowiseAI, RAG with vector databases

## Experience

- Export-Import Bank of Thailand, Senior Full-Stack Developer (Dec 2025 to present, contract): migrated legacy ASP.NET WebForms to a modular .NET Core 7 architecture using DDD and CQRS; upgraded SSIS ETL from 2008 to 2022; ran a Microsoft Fabric PoC; upgraded Apache and PHP environments
- Fujitsu (Thailand), Senior Full-Stack Developer (Aug 2023 to Jul 2024, contract): upgraded legacy systems and built new solutions for Mizuho Bank to comply with ISO 20022
- HUA SENG HENG, Senior Full-Stack Developer, New BU (Mar 2023 to Jun 2023): prototyped an online TFEX account-opening system (5 to 8 minute registration); automated daily closing-price import and reporting
- Asia Plus Securities, Senior/Lead Full-Stack Developer (Apr 2021 to Feb 2023): led the SEC-compliant Staff Disclosure system; built the QR Payment Service and APIs for Bitkub, FX data, and implied volatility
- Honda Leasing (Thailand), Senior Full-Stack Developer (Aug 2020 to Mar 2021, contract): built the Contract Closing Control workflow system; added vendor E-Tax support
- King Tech Soft, Founder / Full-Stack Developer (Jul 2019 to Mar 2020): built a QR Smart Booking System for Muang Boran and Erawan Museums (200,000+ transactions, POS and E-Tax); built a condo booking deposit system with K-Bank Payment Gateway
- GEC Service (PTT Group vendor), Senior Programmer (Mar 2018 to Jun 2019): PTTEP Smart Procurement and PTT Smart Contract workflow automation
- PTT Digital, Senior Programmer (Jun 2017 to Feb 2018): "Digital Ask" microservice and SSO auth server; Risk Assessment and Inventory system improvements
- GM CORP, Programmer / Business Dev Specialist (Dec 2013 to May 2017): Credit Bureau Automation (CIMB), currency exchange POS, and internal tools
- Early career (Oct 2010 to Nov 2013): IT support at Thai Textile Industry PCL; SEO and web development at Siamwebthai

## Recent projects

- Serverless & Backend Evolution (Dec 2025 to present): Azure VM (IaaS) to serverless/PaaS, Azure Container Apps with scale-to-zero, CloudAMQP (RabbitMQ), and Azure APIM with Managed Identities
- AI RAG & SEO Optimization (Dec 2025 to present): portfolio rebuilt on Cloudflare Pages, SEO/AIO optimization, VectorDB migrated from Azure PostgreSQL to Supabase
- Reliability & Performance PoCs (Dec 2025 to present): Redis, Elasticsearch/Kibana read models, K6/Grafana/Prometheus monitoring, HA PostgreSQL with read replicas
- Cloud-Native & DevSecOps (Apr 2025 to Sep 2025): Cloudflare Tunnels (Zero-Trust) with Traefik, Jenkins and GitHub Actions CI/CD with test pyramids, Keycloak, RabbitMQ
- Custom Microservices & AI RAG (Apr 2025 to Sep 2025): RAG flows with VectorDB, custom OAuth 2.0 for GPT extensions, .NET 8 REST APIs, MongoDB, Azure Key Vault with federated credentials

## Education

- B.Sc. in Information Technology, Southeast Bangkok College (2015)
- Higher Diploma in Information Technology, Attawit Commercial College (2012)
- Vocational Certificate in Business Computer, Attawit Commercial College (2010)
- Training: Greatfriend Business Development (2015; OOAD, OOP and design patterns, AngularJS); Technical Training Center (2014; Querying Microsoft SQL Server 2012)

## Contact

Use the contact form at https://cv.teelek.me/#contact or connect on LinkedIn.