Junior/Mid Full stack Developer

PT Tri Agung Nusantara; Jakarta Utara; On-site; IDR 167,400,000 - 256,680,000; Full time

Job summary

PT Tri Agung Nusantara is seeking a capable Frontend/Mobile/Fullstack Developer to design, build, and maintain cross‑platform mobile apps with Flutter and rich web interfaces with Next.js.

You will integrate REST APIs, collaborate with UI/UX designers, and ensure pixel‑perfect implementation across iOS and Android, while keeping performance and quality at the forefront.

Qualifications

• 2-3 years experience as Frontend/Mobile/Fullstack developer.
• Strong Flutter and Dart skills; solid state management know‑how.
• Experience building and consuming REST APIs with Node.js and Express.
• Familiar with NoSQL databases (MongoDB).
• Pixel‑perfect UI implementation and attention to detail.

Responsibilities

• Design, build, and maintain cross‑platform mobile apps (iOS & Android) with Flutter.
• Develop responsive web interfaces using Next.js.
• Integrate web and mobile apps with backend REST APIs.
• Collaborate with UI/UX designers and perform debugging to optimize performance.

Skills

Flutter

Dart

REST APIs

State management

Pixel-perfect design

Debugging

Performance optimization

Tools

Next.js

Node.js

Express

MongoDB

TypeScript

Job description

Mobile Development: Design, build, and maintain high-performance cross-platform mobile applications (iOS & Android) using Flutter.

Web Frontend Development: Develop responsive, dynamic, and SEO-friendly web interfaces using Next.js.

API Integration: Connect web and mobile applications with backend services via existing or newly developed REST APIs.

Backend Support (As needed): Assist in tweaking, maintaining, or creating lightweight REST API endpoints using Node.js, Express, and MongoDB to support frontend/mobile requirements.

Collaboration & Quality: Collaborate with UI/UX designers to ensure accurate design implementation, perform debugging, optimize application performance, and conduct code testing.

Requirements

Proven working experience of 2 - 3 years as a Frontend Developer, Mobile Developer, or Fullstack Developer.

Mobile Expertise (Flutter): Strong proficiency in the Flutter framework and Dart programming language. Solid understanding of state management (e.g., Provider, Riverpod, BLoC, or GetX) and mobile app lifecycles.

Backend & Database Understanding: Functional experience or understanding of building and maintaining REST APIs using Node.js and Express, as well as familiarity with basic NoSQL database operations (MongoDB).

Integration & Networking: Experienced in consuming REST APIs, handling authentication (e.g., JWT/OAuth), and managing asynchronous data.

Strong problem-solving skills and a keen eye for design details (pixel-perfect implementation).

Nice to Have

Experience using TypeScript on both the frontend and backend

A portfolio of Flutter applications published on the Google Play Store or Apple App Store.

Experience with design hand-off tools like Figma.

Basic understanding of CI/CD pipelines and the deployment process for web and mobile applications