당근마켓 is seeking a Backend Engineer Intern to join our Notifications organization. In this role, you will contribute to building and operating the high-scale platform responsible for delivering billions of notifications every day, ensuring stability and improving quality.

What You'll Do

Operate the notification delivery platform to ensure billions of notifications are delivered stably every day.
Analyze and improve logic affecting notification quality, such as user fatigue, policies, and targeting conditions.
Analyze data like notification CTR, in-app conversion rates, and incremental contribution to verify actual performance.
Develop or improve features of the notification/target setting tools used by service teams.
Advance the targeting platform through segment definition, condition combination, and policy automation.
Design A/B tests and propose improvement directions based on the results.

What We're Looking For

Possess a mindset for structural thinking and understanding complex systems.
Quickly execute and experiment with even small improvements.
Communicate clearly during collaboration.
Have an understanding of fundamental computer science knowledge like data structures, networks, and databases.
Have an understanding of message queues and asynchronous processing structures.
Understand communication models like REST and gRPC and be capable of designing and developing highly usable APIs.

Nice to Have

Have experience taking ownership and operating a service.
Continuously strive to improve low complexity and low communication costs.
Have experience using Go and React.
Have experience with A/B testing, experimental design, and data analysis.
Have an interest in user segmentation, recommendation, and targeting logic.

Technical Stack

Go
React
gRPC

Team & Environment

You will be part of the Notifications organization.

We aim to create an environment where individuals can grow alongside the company's growth.

According to the 'Act on the Employment Promotion and Vocational Rehabilitation of Persons with Disabilities' and the 'Act on the Honorable Treatment and Support of Persons of Distinguished Service to the State', persons with disabilities and national merit recipients are given preferential treatment during the hiring process.