Senior Software Engineer, Backend
Core
Design, develop, and operate backend APIs and microservices for Mercari's global C2C marketplace and payment platforms.
Role type
Senior Backend Software Engineer
Builds
APIs, microservices, and database systems for Mercari's marketplace and payment services
Domain
E-commerce / Fintech
Deliverable
production ML models | product features | infrastructure
Required skills
Backend API design, Go/Java/PHP, Microservice architecture, Database design (MySQL/RDBMS), System performance tuning, Middleware selection, On-call incident management
Preferred skills
Project management, Team leadership, Cloud development (GCP/AWS), NoSQL, Linux, Monitoring systems, SLO/SLA, Open-source contributions
Technologies
Go, Java, PHP, MySQL, GCP, AWS
Responsibilities
Design and develop APIs, Tune microservice performance, Collaborate with PMs on development lifecycle, Handle customer support inquiries, Respond to system alerts on call, Select middleware and design architecture
Seniority
Senior, hands-on IC