Preechawut Pothimakul / Gain

I am a software, backend, full stack developer.

Available for workBangkok, TH

About

👋 Hi, I'm Gain.
I'm passionate about everything in technology.

Python

Next.js

React

TypeScript

Odoo

Working

Software Developer

May 2025 – PresentBangkok, TH

Develop web applications, backend APIs, and ERP workflows using Go, Next.js, Python, and Flutter.

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Built RESTful backend services in Go/Fiber within a monorepo architecture.
Developed customer onboarding and payment workflows in Go, including OTP verification, eKYC, DOPA national ID verification, and third-party API integrations.
Deployed and operated backend services on Kubernetes and AWS using Argo CD in the client's production environment.

Developed Go backend APIs and Next.js frontend features for a corporate system covering data management, financial tracking, and reporting.
Released across QAS, UAT, and production through the client's GitLab CI/CD pipeline, meeting their SonarQube code quality and security gates.

Customized ERP workflows in Python to support internal business operations, delivering feature enhancements and process improvements across related modules.

Developed Go backend services and Flutter features for an end-to-end investment account opening flow, covering registration, identity verification, account selection, and submission.
Integrated multiple identity verification channels including ThaID, NDID, and 7-Eleven.

Internship

Nov 2024 – Mar 2025Bangkok, TH

Built a responsive e-learning application with React and Firebase, covering authentication, courses, and learning flows.

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Built a responsive E-Learning web application with ReactJS and Firebase covering user authentication, course listing, and the core learning flow.

my-pensieve
Personal portfolio built with Next.js — work, notes, and a little about me.
Open on GitHub
mockmockk
Self-hosted mock REST API server.
Open on GitHub