Full Stack Developer

SATURDAYS Indonesia is a growing retail & lifestyle brand operating an omni-channel business with strong warehouse-driven operations. Our technology team plays a critical role in supporting real-world retail execution — from Warehouse Management Systems (WMS) and Point of Sale (POS) to E-Commerce platforms that must be reliable, performant, and operationally sound. You will be joining a

small and lean engineering team , reporting directly to the

Head of Tech , where individual ownership and engineering maturity matter more than titles.

The Role We are looking for a

Mid / Senior Full-stack Developer

who is comfortable working on

system-heavy, production-critical applications . This role is hands-on and execution-focused, ideal for engineers who understand how software behaves in real retail and warehouse environments. This is a

contract position , based in

Jakarta with a hybrid working arrangement .

Responsibilities

Design, develop, and maintain full-stack applications supporting retail operations

Build and optimize REST APIs with strong focus on

performance, scalability, and bandwidth efficiency

Apply clean

Object-Oriented Programming (OOP)

principles and maintainable system architecture

Develop and enhance systems related to

Warehouse Management (WMS), Point of Sale (POS), and E-Commerce flows

Work closely with operations, product, and tech stakeholders in a fast-moving environment

Ensure

system reliability, observability, and operational readiness

in production

Participate in troubleshooting, performance tuning, and incident resolution when needed

Security & Architecture Expectations

Practical understanding of

security design

across WMS, POS, and E-Commerce systems

Familiarity with

authentication, authorization, data integrity, and API security

concepts

Ability to make

sound technical decisions independently , without heavy supervision

Requirements

Mid-level to Senior-level experience as a

Full-stack Developer

Strong proficiency in

Node.js, TypeScript, and REST API design

Solid experience with

relational databases

(PostgreSQL, MySQL, or MariaDB)

Production experience using

React and Next.js

Familiarity with

Docker-based development , GitHub, and CI/CD pipelines

Comfortable working in

lean teams

with high ownership and accountability

Preferred Qualifications

Experience in

Retail, Warehouse, Logistics, or inventory-heavy systems

Prior exposure to

WMS, POS, or E-Commerce backend systems

Mandarin proficiency

(spoken or written) is a strong advantage

Work Arrangement & Language

Location:

Jakarta (Hybrid)

Employment Type:

Contract

Language:

English is the primary working language; Mandarin is highly preferred

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