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I'm a Senior Software Engineer with 6+ years of experience delivering backend and full-stack systems in AWS-based microservice architectures. I design scalable, reliable platforms that balance performance with operational efficiency. I thrive in fast-paced environments, mentoring teammates, onboarding quickly, and delivering measurable results through clear planning, automated pipelines, and hands-on execution.…I'm a Senior Software Engineer with 6+ years of experience delivering backend and full-stack systems in AWS-based microservice architectures. I design scalable, reliable platforms that balance performance with operational efficiency. I thrive in fast-paced environments, mentoring teammates, onboarding quickly, and delivering measurable results through clear planning, automated pipelines, and hands-on execution.

Yutaro Tomohiro

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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I'm a Senior Software Engineer with 6+ years of experience delivering backend and full-stack systems in AWS-based microservice architectures. I design scalable, reliable platforms that balance performance with operational efficiency. I thrive in fast-paced environments, mentoring teammates, onboarding quickly, and delivering measurable results through clear planning, automated pipelines, and hands-on execution.…I'm a Senior Software Engineer with 6+ years of experience delivering backend and full-stack systems in AWS-based microservice architectures. I design scalable, reliable platforms that balance performance with operational efficiency. I thrive in fast-paced environments, mentoring teammates, onboarding quickly, and delivering measurable results through clear planning, automated pipelines, and hands-on execution.

Available to hire

I’m a Senior Software Engineer with 6+ years of experience delivering backend and full-stack systems in AWS-based microservice architectures. I design scalable, reliable platforms that balance performance with operational efficiency.
I thrive in fast-paced environments, mentoring teammates, onboarding quickly, and delivering measurable results through clear planning, automated pipelines, and hands-on execution.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Intermediate

Japanese

Fluent

Work Experience

Senior Software Engineer at Fenrir Inc.

April 1, 2020 - Present

Identified and optimized read-heavy APIs backed by 1B+ records data base through query analysis and indexing improvements. Improved API performance by reducing latency from 10+ seconds to under 5 seconds without compromising system reliability. Transitioned content operations from internal engineers to external vendors through workflow redesign and execution-ready documentation. Reduced internal engineering effort from 8–11 person-days/month to 1–2, eliminating single-point dependencies.