Surasak Jaroensiri

Full-stack software engineer with 6+ years of cumulative professional experience building and supporting production applications for hospitality, wholesale operations, insurance and logistics. Experienced in business-process analysis, end-to-end web development, API and database integration, AWS cloud operations, Linux automation and payment systems. Comfortable owning the path from technical design and implementation to testing, deployment and production support.

I've worked in a multinational, fully English-speaking environment and use structured, human-reviewed AI-assisted development.

Business Systems / Full-Stack Developer at Nakhon Sawan Yong Yu Seng Co., Ltd. (YYS) (2026-02 – Present)

• Own delivery of internal business applications from stakeholder requirements and workflow analysis through system design, full-stack implementation, testing, deployment and production support.
• Develop operational tools for purchasing, warehouse processes, inventory, pricing and promotions, maintenance, and sales-support workflows; design interfaces for desktop, mobile and tablet use.
• Build Next.js, React and TypeScript applications with REST APIs and relational databases; work with ERP-connected data, reporting and integrations while emphasizing accuracy and controlled access.
• Design and implement authentication and authorization patterns, including single sign-on (SSO), role-based access control (RBAC), API access management and secure credential-handling practices.
• Support data-oriented business workflows and reports with SQL Server, PostgreSQL, Excel/Power Query and Google Workspace APIs, including validation and reconciliation of outputs.
• Strengthen production change management with security review, auditability, database-migration checks, automated validation, Git workflows and deployment verification.
• Organize Claude Code-assisted feature delivery through scoped tasks, handoff documentation, human code review, testing and release checks; use AI tools without delegating final engineering decisions.

Full-Stack Developer at Redplanet Hotels (2022-02 – 2025-09)

• Developed and maintained hospitality web applications, including booking experiences, content-management tools and integration services, using Laravel/PHP, React, JavaScript, MySQL and REST APIs.
• Built and integrated backend services, cloud functions and microservice-style components supporting internal and external application workflows.
• Worked on payment gateway integrations with Omise and Adyen for online transaction workflows.
• Managed and supported AWS-hosted projects and services using Amazon EC2, CloudWatch and Elasticsearch, including investigation and support of production issues.
• Deployed applications through Jenkins; designed scripts running on Ubuntu-based EC2 instances and used PM2 for application process management.
• Collaborated with engineering and UX/UI colleagues on application quality, user experience and operational reliability.
• Worked in a multinational organization where daily communication, collaboration and technical discussion were conducted entirely in English.

Backend Developer at 724 Marker (Srikrung Group) (2019-02 – 2019-08)

• Developed online insurance sales applications, administrative tools and affiliate landing pages using PHP and Vue.js.
• Worked with QA on testing, defect investigation and fixes for production releases.

Backend Developer at The Absolute Group (2018-01 – 2018-06)

• Developed a vehicle dispatch/fleet-management web application using PHP, Vue.js and Microsoft SQL Server.
• Integrated vehicle GPS-location and CCTV information into operational management workflows.

General English, Upper-Intermediate program – Australian National College of English (2019 – 2021)

Bachelor's Degree in Business Computer – Mahasarakham University (2014 – 2017)

Lower and upper secondary education – Sarakham Pittayakhom School (2009 – 2014)