Full Stack Developer

FLIN; Jakarta Pusat; On-site; IDR 167,400,000 - 312,480,000; Full time

Job summary

FLIN is seeking a capable Full Stack Developer to design, build, and ship features across frontend and backend, from requirements to production.

You will develop mobile apps with React Native, responsive web apps using PHP/WordPress, and maintain REST APIs with Node.js. The role involves database design, AI API integration, and deploying to Linux servers with modern CI/CD workflows.

Qualifications

• 2–3 years of professional experience as a Full Stack Developer
• Solid experience building REST APIs with Node.js (Express, NestJS, or similar)
• Experience with relational databases (MySQL / PostgreSQL): schema design, queries, indexing
• Experience with React Native is a plus
• Working knowledge of WordPress: custom plugins, hooks, and the WP REST API
• Experience calling AI APIs (OpenAI, Anthropic, etc.) in a real project
• Comfortable with Git, code reviews, and team branching workflows
• Linux proficiency: SSH, server setup, logs, process management (PM2 / systemd), Nginx
• Understanding of web security basics: authentication, authorization, OWASP Top 10

Responsibilities

• Design, build, and ship features across frontend and backend, from requirement to production
• Develop Mobile App using React Native and web apps with PHP/WordPress
• Build and maintain backend services and REST APIs using Node.js
• Design database schemas and write efficient queries in MySQL / PostgreSQL
• Develop and maintain custom WordPress themes, plugins, and integrations via the WP REST API
• Integrate AI APIs into products and internal workflows, including prompt design
• Integrate third-party services such as payment gateways, CRM, messaging, and partner APIs
• Deploy, monitor, and troubleshoot applications on Linux servers and cloud infrastructure
• Write clean, tested, maintainable code and take part in code reviews
• Work with QA to fix bugs, improve test coverage, and keep releases stable
• Apply security best practices to protect customer and financial data
• Document architecture, APIs, and technical decisions for the team

Skills

REST APIs

Node.js

React Native

WordPress

AI APIs integration

Git & code reviews

Linux administration

Web security basics OWASP

Tools

Node.js frameworks (Express NestJS)

MySQL / PostgreSQL

WordPress development

Docker

CI/CD (GitHub Actions/GitLab)

Nginx

Job description

Responsibilities

Design, build, and ship features across frontend and backend, from requirement to production

• Develop responsive web applications using PHP , Wordpress
• Build and maintain backend services and REST APIs using Node.js
• Design database schemas and write efficient queries in MySQL / PostgreSQL
• Develop and maintain custom WordPress themes, plugins, and integrations via the WP REST API
• Integrate AI APIs (Claude, OpenAI) into products and internal workflows, including prompt design and output handling
• Integrate third-party services such as payment gateways, CRM, messaging, and partner APIs
• Deploy, monitor, and troubleshoot applications on Linux servers and cloud infrastructure
• Write clean, tested, maintainable code and take part in code reviews
• Work with QA to fix bugs, improve test coverage, and keep releases stable
• Apply security best practices to protect customer and financial data
• Document architecture, APIs, and technical decisions for the team

Responsibilities

Design, build, and ship features across frontend and backend, from requirement to production

• Develop Mobile App using React Native
• Develop responsive web applications using PHP , Wordpress
• Build and maintain backend services and REST APIs using Node.js
• Design database schemas and write efficient queries in MySQL / PostgreSQL
• Develop and maintain custom WordPress themes, plugins, and integrations via the WP REST API
• Integrate AI APIs (Claude, OpenAI) into products and internal workflows, including prompt design and output handling
• Integrate third-party services such as payment gateways, CRM, messaging, and partner APIs
• Deploy, monitor, and troubleshoot applications on Linux servers and cloud infrastructure
• Write clean, tested, maintainable code and take part in code reviews
• Work with QA to fix bugs, improve test coverage, and keep releases stable
• Apply security best practices to protect customer and financial data
• Document architecture, APIs, and technical decisions for the team

Requirements

Must Have

• 2 to 3 years of professional experience as a Full Stack Developer
• Solid experience building REST APIs with Node.js (Express, NestJS, or similar)
• Experience with relational databases (MySQL / PostgreSQL): schema design, queries, indexing
• Experience with React Native is plus
• Working knowledge of WordPress: custom plugins, hooks, and the WP REST API
• Experience calling AI APIs (OpenAI, Anthropic, etc.) in a real project
• Comfortable with Git, code reviews, and team branching workflows
• Linux proficiency: SSH, server setup, logs, process management (PM2 / systemd), Nginx
• Understanding of web security basics: authentication, authorization, OWASP Top 10

Nice to Have

• Experience with Docker and CI/CD pipelines (GitHub Actions, GitLab CI)
• Cloud experience (AWS, GCP, or similar)
• Mobile development exposure (React Native or Flutter)
• Experience building AI workflows: RAG, agents, or automation pipelines
• Experience writing unit and integration tests (Jest, Vitest, Supertest)
• Background in fintech, lending, or other regulated industries