Senior Backend Engineer(Mobile Platform)

The role

This person will design, develop, and operate backend platforms that connect mobile services with vehicles. They will build scalable systems for SDV-based services and manage APIs for large-scale traffic.

What you will do

• Design and develop backend systems for connected services linking smartphones and vehicles.
• Build and operate scalable backend platforms across vehicles, mobile, and cloud.
• Develop and operate APIs and serving systems to handle large-scale vehicle and mobile client requests.
• Monitor operation logs and metrics to improve service stability and quality.
• Participate in design reviews and technical decision-making.
• Improve complex problems into reusable and scalable systems.

Required qualifications

• 7+ years of experience in backend service design, development, and operation based on Spring Boot (Kotlin/Java), Go, etc.
• Experience designing and operating API/backend services receiving production traffic.
• Experience analyzing and improving service issues based on logs and metrics.
• Understanding of authentication/authorization standard protocols such as OAuth 2.0 and OpenID Connect.
• Experience leading initial design, structuring, standardization, and operational stability improvement.

Nice to have

• Experience developing real-time communication services based on stateful connections such as WebSocket, gRPC Streaming, or MQTT.
• Experience developing and operating large-scale services based on Spring Boot.
• Experience developing high-performance servers based on Go.
• Experience operating services based on AWS, Kubernetes, and Helm.
• Experience designing and operating services in an MSA environment.
• Experience developing vehicle connected services, IoT, or device connection services.
• Experience with multi-language/multi-region (global) services.
• Experience in technical leading, design review, and junior mentoring.

Before you apply

• Interview process includes document screening, coding/assignment test, 1st interview (video, approx. 1 hour), and 2nd interview (in-person or video, approx. 3 hours).
• Do not include prohibited information such as resident registration number, family relations, marital status, salary, photo, physical conditions, or origin in the application.
• Employment may be canceled if false information is found in the application.
• Reference checks may be conducted after the interview process with the candidate's consent.
• A 3-month probation period may apply.

About the company

42dot's Mobile Platform Engineering team creates new service areas for the SDV era by connecting mobile services and vehicles.