Senior Backend Engineer-SaaS Platform
Employment Type:
Full-time
Location:
Tokyo (Hybrid - 3 days office / 2 days remote)
Salary:
¥8M - ¥15M / year (plus overtime, bonuses, and stock options)
About The Company
A Japan-based marketing technology company operating globally in SaaS and AI solutions.
The organization has been recognized among Asia-Pacific's high-growth tech companies and continues to scale its enterprise offerings through AI-powered business platforms.
The Role
As a Senior Backend Engineer, you will play a key technical leadership role in developing and scaling a fast-growing SFA/CRM SaaS product.
This position focuses on backend architecture, team mentorship, and code quality improvement while working in a collaborative, modern tech environment.
ResponsibilitiesDesign, build, and maintain backend systems for large-scale SaaS applications
Lead architecture and technical design discussions
Write high-quality, maintainable code and perform detailed code reviews
Mentor and guide junior engineers
Collaborate cross-functionally with product, design, and business teams
Continuously improve performance, scalability, and system robustness
Tech Environment
Backend:
Python
Frontend:
React, TypeScript
Cloud:
AWS, GCP
Database:
MongoDB, MySQL, Redis
Container & CI/CD:
Docker, GitHub Actions, Jenkins
Architecture:
Domain-Driven Design (DDD)
Qualifications
Must-Have:
3+ years of backend or full-stack development experience
Strong coding skills in Python or other backend languages
SaaS product development experience
Technical mentorship or team leadership experience
Cloud deployment experience (AWS/GCP)
Familiarity with relational and NoSQL databases
Nice-to-Have
Experience in large-scale SaaS architecture
Automated testing or CI/CD implementation
Knowledge of DDD or scalable design patterns
What's Offered
Hybrid work flexibility
Competitive salary and stock options
AI tool usage covered (e.g., ChatGPT, Claude)
Learning and development budget
Refresh and housing allowances
Selection Process
Resume → Coding Test → Interviews → Final Interview
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