Junior Fullstack Engineer

PT. Lalu Lintas Lancar; Tangerang Selatan; On-site; IDR 133,920,000 - 200,880,000; Full time

Job summary

PT. Lalu Lintas Lancar is seeking a junior full stack developer to work across the stack using Next.js/TypeScript and Go (Fiber). You will also maintain a legacy PHP+vanilla JS app and ensure robust data access with MySQL/PostgreSQL.

You will participate in API design via OpenAPI, implement caching with Redis/Valkey, and collaborate through code reviews and mentorship from senior engineers.

Qualifications

• Bachelor's Degree in Computer Science, Information Systems, Software Engineering, or related fields.
• Fresh graduates welcome; candidates with up to 1 year of Full Stack/Software Development experience encouraged.
• Experience with React.js, Next.js, Java, Spring Boot, Node.js, Go or equivalent frameworks.
• React + Next.js basics: components, hooks, routing, data fetching.
• Clean, semantic HTML/CSS and responsive layout.
• Understands HTTP/REST APIs.
• Go idioms: structs, interfaces, error values, goroutines at a basic level.
• Can model data and write correct queries against MySQL and PostgreSQL.
• SQL fundamentals: joins, filtering, aggregation, indexes.
• Relational modeling: primary/foreign keys, normalization basics.

Responsibilities

• Build new user-facing features across the stack in Next.js/TypeScript and Go (Fiber).
• Maintain, debug, and incrementally improve the legacy PHP + vanilla JS application.
• Write and query MySQL/PostgreSQL; help keep data access correct and performant.
• Integrate caching and messaging with Redis/Valkey under guidance.
• Follow API contracts documented via OpenAPI.
• Participate in code review, testing, and mentorship from senior engineers.

Tools

React.js

Next.js

Java

Spring Boot

Node.js

Go

MySQL

PostgreSQL

REST APIs

OpenAPI

Redis

Valkey

Job description

Bachelor's Degree in Computer Science, Information Systems, Software Engineering, or other related disciplines.

Fresh graduates are welcome to apply; candidates with up to 1 years of experience in Full Stack Development or Software Development are encouraged to apply.

Experience with technologies such as React.js, Next.js, Java, Spring Boot, Node.js, Go, or equivalent frameworks.

React + Next.js basics: components, hooks, routing, data fetching

Clean, semantic HTML/CSS and responsive layout

Understands building and consuming HTTP/REST APIs

Reasonable Go idioms: structs, interfaces, error values, goroutines at a basic level

Can model data and write correct queries against MySQL and PostgreSQL

SQL fundamentals: joins, filtering, aggregation, indexes at a basic level

Understands relational modeling: primary/foreign keys, normalization basics

Job Responsibilities:

Build new user-facing features across the stack in Next.js/TypeScript and Go (Fiber).

Maintain, debug, and incrementally improve the legacy PHP + vanilla JS application.

Write and query MySQL/PostgreSQL; help keep data access correct and performant.

Integrate caching and messaging with Redis/Valkey under guidance.

Follow API contracts documented via OpenAPI.

Participate in code review, testing, and mentorship from senior engineers.