Fullstack Developer

SingaPay; Tangerang; On-site; IDR 360,000,000 - 720,000,000; Full time

Job summary

SingaPay in Indonesia is seeking a versatile Full-Stack Developer to build, maintain, and scale payment-focused web applications and APIs. You will work across frontend and backend, collaborating with product, QA, and design teams to deliver robust solutions.

Proficiency in PHP/Laravel or Golang/Fiber, plus ReactJS/Svelte/VanillaJS and databases like MySQL, PostgreSQL, or MongoDB is valued. Experience with Redis, Kafka or RabbitMQ, REST, OAuth2/JWT, and payment APIs is a strong plus; we value

Qualifications

• Strong experience with PHP/Laravel and/or Golang/Fiber.
• Experience with ReactJS, Svelte, or VanillaJS.
• Experience with MySQL, PostgreSQL, and/or MongoDB.
• Understanding of Redis, Kafka, RabbitMQ, or message-broker systems.
• Good understanding of REST API, authentication, authorization, OAuth2 & JWT.
• Able to write optimized SQL and work with large datasets.
• Experience integrating payment/financial APIs.

Responsibilities

• Develop and maintain web applications and RESTful APIs.
• Build frontend interfaces and integrate them with backend services.
• Optimize databases, caching, and message-queuing systems.
• Troubleshoot and maintain existing systems.
• Collaborate closely with Product, QA, Design, and other cross‑functional teams.
• Continuously improve our systems and development practices.

Skills

PHP/Laravel

Golang/Fiber

ReactJS

Svelte

VanillaJS

MySQL

PostgreSQL

MongoDB

Redis

Kafka

RabbitMQ

REST API

OAuth2 & JWT

SQL optimization

Payment APIs

Tools

Claude Code

DeepSeek

Codex

Job description

We’re looking for a Full-Stack Developer to join our IT team and help build, maintain, and scale web applications and payment-related systems.

What we’re looking for:

• Strong experience with PHP/Laravel and/or Golang/Fiber
• Experience with ReactJS, Svelte, or VanillaJS
• Experience with MySQL, PostgreSQL, and/or MongoDB
• Understanding of Redis, Kafka, RabbitMQ, or message-broker systems
• Good understanding of REST API, authentication, authorization, OAuth2 & JWT
• Able to write optimized SQL and work with large datasets
• Experience integrating payment/financial APIs, particularly:
• Money-In: VA, QRIS, Payment Link, Bank, Payment Gateway, Switching
• Money-Out: Bank Transfer, PPOB, QRIS, Payment Gateway, Switching
• Familiarity with AI coding assistants such as Claude Code, DeepSeek, Codex, etc.

What you’ll do:

• Develop and maintain web applications and RESTful APIs
• Build frontend interfaces and integrate them with backend services
• Optimize databases, caching, and message-queuing systems
• Troubleshoot and maintain existing systems
• Collaborate closely with Product, QA, Design, and other cross‑functional teams
• Continuously improve our systems and development practices