IT / Web DevelopmentSenior
IT / Web Development × Senior
Senior backend engineer with over 12 years of experience in web development, specializing in designing and implementing microservice architectures for high-traffic systems and leading technical teams. At my previous role, I spearheaded the overhaul of a platform serving 3 million DAU, cutting API response times by 40%. Extensive experience in agile development within bilingual (Japanese/English) environments.
📌 Career Summary
- ▸2018 - Present | Tech Inc. (SaaS Platform) | Senior Backend Engineer / Tech Lead
- ▸2014 - 2018 | Global Web Agency | Backend Engineer
- ▸2011 - 2014 | Startup | Full Stack Engineer
📌 Achievements & Strengths
- ▸Led the migration from a monolithic architecture to 15 microservices, increasing deployment frequency from twice a month to multiple times per day while maintaining 99.99% system uptime.
- ▸Optimized performance for a consumer app with 3 million DAU by implementing Redis caching and refining database queries, reducing average API response time from 250ms to 150ms—a 40% improvement.
- ▸Boosted development productivity by building CI/CD pipelines (GitHub Actions, ArgoCD), cutting lead time by 30%. Mentored 5 junior engineers, 2 of whom were promoted to senior roles.
📌 Skills
- ▸Backend: Go, Python, Node.js, gRPC, GraphQL
- ▸Infrastructure & DevOps: AWS (EKS, Lambda, RDS), Terraform, Docker, Kubernetes, GitHub Actions
- ▸Databases: PostgreSQL, Redis, DynamoDB
- ▸Languages: Japanese (native), English (business level / TOEIC 920)
📌 Self-PR
- ▸I consistently focus on balancing technical debt resolution with business value. During the platform overhaul at my previous company, business stakeholders pushed for new features, but I convinced management by quantifying the ROI of refactoring. I adopted the strangler fig pattern to release new features in parallel, completing the architecture migration safely over six months. I aim to act as a bridge that maximizes business impact and team growth, not just technical execution.
💡 Key Tips
- 💡When applying to foreign companies, ensure your LinkedIn profile is also in English and aligned with your resume; secure at least 3 recommendations.
- 💡At the senior level, interviewers will probe not only the technologies you've used but also how you contributed to the organization and business (ROI, team building). Prepare stories behind the numbers.
- 💡Go beyond listing your tech stack—be ready to explain why you chose specific technologies (trade-off decisions) to excel in architecture design interviews.
- 💡Create a separate one-page English resume for international roles, emphasizing achievements (Action + Result) in a format tailored to foreign companies.
🔗 🔗 Other levels
Last reviewed: 2026-09-06 · aijobs Editorial