Senior Back End Developer

PT KARYA TEKHNIK UTAMA; Jakarta Utara; On-site; IDR 200.000.000 - 300.000.000; Full time

Job summary

A technology solutions provider is seeking a Senior Back-End Typescript Developer in Jakarta Utara, Indonesia. The ideal candidate will have at least 5 years of experience in building production backends using Python and Flask. Responsibilities include developing and maintaining server-side applications, optimizing performance, and managing MySQL databases. Strong knowledge of security practices and application performance improvements is essential. This position aims for a secure, efficient application environment.

Qualifications

• Minimum of 5 years of experience in building production backends with Python and Flask.
• Strong skills in MySQL/SQL and experience with ORM (Flask-SQLAlchemy).
• Knowledge of RBAC concepts and security basics.

Responsibilities

• Develop and maintain server-side applications and APIs.
• Optimize application performance and ensure security.
• Design and manage MySQL databases and perform migrations.

Skills

Back-End Development

Python

Flask

MySQL

ORM

Security Basics

Job description

Senior Back-End Typescript Developer

Bali, ID

Ebit Co., Ltd

Responsibilities:

• Develop and main server side application, Flask application layer likes routing, controllers, services, and validators
• Build APIs and transaction workflow endpoints
• Optimize performance and ensure application security
• Design and maintain MySQL databases (scheme, relation, constraint, and indexing); manage migrations safely
• Implement session-based authentication, simple RBAC, and multi-tenant data access
• Create audit logs and transaction tracing
• Deploy and maintain application via WSGI on Windows
• Support incident response, troubleshoot and bug fixes with RCA

Qualifications:

• Min. have 5 years experiences building production backends with Python and Flask
• Strong MySQL/SQL skills, experienced with ORM (Flask-SQLAlchemy)
• Have knowledge about transaction and indexing, RBAC concept and control access in endpoint and service layer
• Have knowledge of security basics: password hashing, input validation, CSRF, OWASP basics
• Familiar with deployment on Windows servers and database migrations
• Experience with audit trails and compliance logging