APICHAI SORAYAN
Solo Developer & Prompt Engineer
Summary
Passionate Solo Developer and Prompt Engineer specializing in scalable architectures and AI-driven solutions. Extremely capable of bridging the gap between imaginative problem solving and complete full-stack technical execution. Driven to leverage cutting-edge technical tools and AI to streamline complex workflows and maximize digital potential independently.
Core Skills
Education
Master of Business Administration (MBA)
Krirk University • Present
Bachelor of Engineering
Railway System Engineering
University of the Thai Chamber of Commerce
GPA 2.91
Languages
Soft Skills
- Strategic Problem Solving
- Project Management
- Effective Communication
- Team Leadership & Mentoring
Key Success
- Transformed manual operations into automated digital systems for multiple SMEs.
- Optimized cloud infrastructure costs by 40% using Serverless & Edge technology.
- Developed custom CRM that reduced admin overhead by 30% and boosted sales efficiency.
- Delivered high-stake clinical booking systems with 100% project delivery rate.
Professional Experience
End-to-End System Design & Implementation
JUNE 2025–PRESENTRattinan Clinic (Solo Developer & Prompt Engineer)
- Spearheaded end-to-end full-stack solution architecture, utilizing advanced AI prompt engineering for rapid feature deployment.
- Developed Room Booking System with real-time Google Calendar synchronization.
- Built Lead Entry System using Cloudflare Workers and D1 for high-performance data handling.
- Implemented technical SEO and performance optimizations for system responsiveness.
- Managed infrastructure and CI/CD using Cloudflare Pages, Workers, D1, and R2 Storage.
Software Engineer - Business Systems Development
FEB 2025–JUNE 2025Unit Company Limited
- Designed multiple internal business systems including centralized Case Management.
- Built an E-Tax System with digital documentation and automated submission.
- Implemented Campaign Management System with tracking and performance analytics.
- Developed Insurance System focusing on customer data and policy tracking.
Software Engineer - CRM & Serverless Solutions
JULY 2024–FEB 2025Krungsri Auto
- Maintained CRM system using Vue.js, Python, DynamoDB, and AWS Lambda.
- Designed serverless business logic to improve system scalability and efficiency.
- Implemented CI/CD pipelines using GitLab for reliable deployments.
Key Projects
Advanced Medical Booking System
Complex appointment system for miraDry & Ultherapy with doctor timeline views and multi-stage procedure logic.
Enterprise-Grade CRM Platform
Custom CRM for clinic management with client profiles, booking history, and real-time data synchronization.
Technical Stack
FRONTEND
Vue, Next.js, React, HTML5, CSS3, JavaScript (ES6+), Tailwind, Framer Motion
BACKEND & DATABASE
Golang, Node.js (Express, Hono), Python, .NET Core, PostgreSQL, MongoDB, D1
PLATFORM & INFRA
AWS, Google Cloud, Cloudflare, ReadyIDC, Linux, VPS, Serverless
Strategic Developer Value
AI-Powered Engineering
I don't just write code; I utilize advanced Prompt Engineering to accelerate development, resolve complex algorithmic challenges, and deploy intelligent features rapidly.
Independent End-to-End Execution
Capable of handling the entire product lifecycle single-handedly, from UI/UX architectural design and database management to serverless frontend deployment.
Cutting-Edge Tech Stack
As a dedicated solo developer, I maintain a deep understanding of modern ecosystems, leveraging Next.js, Cloudflare Edge, and AI tools to build high-performance applications.
Legacy-to-Digital Transformation
Expertly auditing legacy processes and engineering robust automated digital platforms independently that are secure, scalable, and fast.