About this role
Responsibilities
- Design, build, and maintain full-stack applications that power core products and platforms.
- Develop responsive, high-performance user interfaces using React.
- Build and maintain backend services using Go and event-driven architectures.
- Build scalable microservices in containerized environments using Docker and Kubernetes.
- Drive architecture decisions that improve performance, resiliency, and maintainability.
- Collaborate with engineers, product managers, designers, and QA to deliver end-to-end solutions.
- Own your code in production, monitor, debug, and continuously improve application performance and reliability.
- Write automated tests and follow CI/CD best practices to ensure high-quality deployments.
- Participate in code reviews, technical discussions, and knowledge sharing across teams.
- Participate in on-call rotation to support production systems and respond to incidents.
Qualifications & Skills
- 5+ years of full-stack development experience.
- Strong proficiency in React and modern frontend development practices.
- Solid backend experience in Go or a similar language.
- Strong understanding of microservices architecture, distributed systems, and event-based communication.
- Familiarity with cloud infrastructure and container orchestration (e.g., Kubernetes, Docker).
- Solid understanding of observability, monitoring, and performance optimization.
- Ability to troubleshoot production issues, analyze system behavior, and drive resolution.
- Business-level proficiency in Japanese is required.
Nice to Have
- Experience with React Native for mobile development.
- Background in gaming, payments, or commerce systems.
- Experience in adtech or offer monetization platforms.
- Hands-on experience with Kafka or equivalent streaming platforms.
- Experience with Redis or other in-memory data stores.
- Experience with cloud platforms (e.g., AWS, GCP, or Azure).
- Familiarity with ClickHouse, Postgres, or other analytical/OLAP/OLTP databases.
- Prior experience working on internal platforms or developer-facing tools.
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