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I’m Yusuke Doi, a Senior Full Stack Engineer with 13+ years of experience building scalable SaaS platforms, AI-powered applications, and cloud-native systems across startups and global companies including Meta, Amazon, and Microsoft. I specialize in React.js, Next.js, Node.js, PostgreSQL, TypeScript, Docker, and AWS, with hands-on experience delivering responsive dashboards, SSR/SSG apps, REST APIs, and AI-integrated products. I enjoy rapidly prototyping MVPs, integrating LLMs and third-party APIs, and delivering scalable products in fast-moving environments. I excel at turning complex workflows into intuitive user experiences backed by scalable backends and modern frontend architectures. I value product thinking, clean architecture, and AI-assisted development workflows using tools like Cursor, Claude, and GitHub Copilot to accelerate delivery and experimentation. I’m passionate about building software that balances engineering quality with speed, simplicity, and long-term maintainability, collaborating closely with product, design, and operations teams to ship reliable, impactful solutions.…I’m Yusuke Doi, a Senior Full Stack Engineer with 13+ years of experience building scalable SaaS platforms, AI-powered applications, and cloud-native systems across startups and global companies including Meta, Amazon, and Microsoft. I specialize in React.js, Next.js, Node.js, PostgreSQL, TypeScript, Docker, and AWS, with hands-on experience delivering responsive dashboards, SSR/SSG apps, REST APIs, and AI-integrated products. I enjoy rapidly prototyping MVPs, integrating LLMs and third-party APIs, and delivering scalable products in fast-moving environments. I excel at turning complex workflows into intuitive user experiences backed by scalable backends and modern frontend architectures. I value product thinking, clean architecture, and AI-assisted development workflows using tools like Cursor, Claude, and GitHub Copilot to accelerate delivery and experimentation. I’m passionate about building software that balances engineering quality with speed, simplicity, and long-term maintainability, collaborating closely with product, design, and operations teams to ship reliable, impactful solutions.

Yusuke Doi

Full Stack Developer, Back-End Developer, Front-End Developer, +1

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I’m Yusuke Doi, a Senior Full Stack Engineer with 13+ years of experience building scalable SaaS platforms, AI-powered applications, and cloud-native systems across startups and global companies including Meta, Amazon, and Microsoft. I specialize in React.js, Next.js, Node.js, PostgreSQL, TypeScript, Docker, and AWS, with hands-on experience delivering responsive dashboards, SSR/SSG apps, REST APIs, and AI-integrated products. I enjoy rapidly prototyping MVPs, integrating LLMs and third-party APIs, and delivering scalable products in fast-moving environments. I excel at turning complex workflows into intuitive user experiences backed by scalable backends and modern frontend architectures. I value product thinking, clean architecture, and AI-assisted development workflows using tools like Cursor, Claude, and GitHub Copilot to accelerate delivery and experimentation. I’m passionate about building software that balances engineering quality with speed, simplicity, and long-term maintainability, collaborating closely with product, design, and operations teams to ship reliable, impactful solutions.…I’m Yusuke Doi, a Senior Full Stack Engineer with 13+ years of experience building scalable SaaS platforms, AI-powered applications, and cloud-native systems across startups and global companies including Meta, Amazon, and Microsoft. I specialize in React.js, Next.js, Node.js, PostgreSQL, TypeScript, Docker, and AWS, with hands-on experience delivering responsive dashboards, SSR/SSG apps, REST APIs, and AI-integrated products. I enjoy rapidly prototyping MVPs, integrating LLMs and third-party APIs, and delivering scalable products in fast-moving environments. I excel at turning complex workflows into intuitive user experiences backed by scalable backends and modern frontend architectures. I value product thinking, clean architecture, and AI-assisted development workflows using tools like Cursor, Claude, and GitHub Copilot to accelerate delivery and experimentation. I’m passionate about building software that balances engineering quality with speed, simplicity, and long-term maintainability, collaborating closely with product, design, and operations teams to ship reliable, impactful solutions.

Available to hire

I’m Yusuke Doi, a Senior Full Stack Engineer with 13+ years of experience building scalable SaaS platforms, AI-powered applications, and cloud-native systems across startups and global companies including Meta, Amazon, and Microsoft. I specialize in React.js, Next.js, Node.js, PostgreSQL, TypeScript, Docker, and AWS, with hands-on experience delivering responsive dashboards, SSR/SSG apps, REST APIs, and AI-integrated products. I enjoy rapidly prototyping MVPs, integrating LLMs and third-party APIs, and delivering scalable products in fast-moving environments.

I excel at turning complex workflows into intuitive user experiences backed by scalable backends and modern frontend architectures. I value product thinking, clean architecture, and AI-assisted development workflows using tools like Cursor, Claude, and GitHub Copilot to accelerate delivery and experimentation. I’m passionate about building software that balances engineering quality with speed, simplicity, and long-term maintainability, collaborating closely with product, design, and operations teams to ship reliable, impactful solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior Frontend Engineer at Anon tch

August 1, 2023 - April 1, 2026

Led the development of AI-enabled SaaS applications using React.js, Next.js, Nest.js, and MongoDB; built scalable full-stack products in fast-moving startup environments. Architected responsive frontend systems with SSR/SSG strategies, optimized rendering for performance and SEO across devices. Engineered scalable Node.js backend services and REST APIs to support automation workflows and real-time operational systems. Integrated third-party AI/LLM APIs to orchestrate intelligent workflows and AI-assisted tooling. Built interactive dashboards with real-time telemetry and reporting, implemented efficient state management and modular UI components in TypeScript and Tailwind. Established deployment pipelines with Docker, Kubernetes, GitLab CI/CD, and AWS; strengthened observability and logging. Mentored engineers and collaborated with product, design, and operations teams to prototype MVP features.

Senior Frontend Engineer at Meta

April 1, 2021 - July 1, 2023

Spearheaded development of scalable full-stack platforms using React.js, Next.js, Node.js, and PostgreSQL; supported high-traffic internal tools and operational systems. Architected and optimized dynamic dashboards with real-time monitoring, analytics visualization, and operational reporting. Developed backend APIs and microservices with Node.js and Express.js; designed resilient distributed systems using Kafka and event-driven patterns. Accelerated frontend performance with SSR-aware Next.js architecture, modular state management, and optimized rendering. Enhanced data models and queries in PostgreSQL; integrated Grafana/Prometheus/ELK for observability. Drove productivity by introducing reusable frontend patterns, automation tooling, and AI-assisted development workflows; collaborated closely with product, design, and infrastructure teams. Deployed containerized apps using Docker and AWS, with exposure to Kubernetes concepts. Mentored junior engineers through architecture reviews and

Software Engineer at Amazon

June 1, 2016 - March 1, 2021

Engineered cloud-native backend services powering Prime Video platform operations across multiple regions. Automated benchmarking and release validation workflows, enabling data-driven decisions and improved platform reliability. Generated and analyzed millions of operational events daily to drive release decisions. Built automation pipelines and distributed tooling to accelerate testing and deployment, reducing manual intervention. Applied computer vision and machine learning techniques to improve benchmarking reliability and failure detection. Collaborated cross-functionally to refine platform requirements and deliver scalable backend solutions.

Software Engineer at Microsoft

July 1, 2012 - June 1, 2016

Developed scalable platform components and cloud-connected services using C#, .NET, and Azure for large-scale productivity applications. Optimized startup performance, runtime efficiency, and memory utilization through profiling and low-level tuning. Architected telemetry and synchronization systems enabling reliable cross-device experiences. Modernized testing, CI pipelines, and automation workflows using Azure DevOps, achieving significant improvements in unit testing performance and build times. Built internal experimentation tooling with TypeScript, Electron, and native integrations to validate UX concepts rapidly, and strengthened diagnostics through telemetry-driven debugging.