Backend Software Engineer

Backend Software Engineer (NestJS / TypeScript) 1 Position

Responsibilities

Develop and maintain backend systems using NestJS and TypeScript

Design and optimize data models and queries using PostgreSQL

Integrate with external ad platforms (e.g., LinkedIn API)

Implement OAuth2 and other authentication/authorization logic

Design and document RESTful APIs

Write and maintain unit tests (e.g., Jest) and ensure code quality

Collaborate with frontend and other backend developers

Contribute to future features including AI-based automated ad execution and budget optimization

Requirements

2+ years of experience with backend development using Node.js/NestJS

Practical experience with TypeScript

Experience with relational databases (PostgreSQL, etc.)

Familiarity with message queues like RabbitMQ or Kafka

Experience implementing secure API authentication (OAuth2, etc.)

Experience with writing tests and participating in code reviews

Proficiency with collaboration tools (Git, Jira, Notion, etc.)

Preferred Qualifications

Experience integrating with ad platform APIs (Meta, Kakao, Google Ads, etc.)

Experience with infrastructure tools (Docker, Redis, Clickhouse, etc.)

Experience with cloud platforms such as AWS or GCP

Proficiency in English or Korean communication

WALA-ICT offers a comprehensive and competitive compensation package, including:

• Attractive salary
• Full salary during probation period
• 13th-month bonus
• Hybrid working model (home office and in-office)
• 40-hour work week, Monday-Friday
• Open-minded, friendly, positive, transparent, and agile work environment