Ryota Ikezawa
Senior Architect / Full Stack Engineer
Full-stack engineer with over 8 years of experience. Currently serving as a Senior Architect in the HR/Payroll Integration Platform team at freee K.K., responsible for microservices design/operations, cross-team architecture, and technical leadership. Proficient in Ruby, Rails, Go, TypeScript, React.js, AWS, and Docker.
Work Experience
Approximately 10 years at freee K.K., a cloud accounting software provider. Started with data aggregation feature development, progressed through Tech Lead and Engineering Manager roles, currently serving as Senior Architect.
Serving as Senior Architect in the HR/Payroll Integration Platform team. Responsible for legacy system remodeling, microservices design, feature development, and migrations. Also involved in cross-team architecture initiatives.
Led a portion of the global team to deliver the Employee Portal feature from planning to release. Served as a playing manager in an English-speaking environment, leading both team operations and development.
As a contractor, handled Rails framework upgrades, dependency management, and migration from Paperclip to ActiveStorage.
Worked on infrastructure migration projects from on-premises environments to AWS (public cloud).
Projects
Personal tech blog. Built with Astro and deployed to Cloudflare Workers.
Personal development environment configuration managed with chezmoi.
A web app for easily generating and printing bib numbers for motorcycle races like motocross and enduro.
A data-driven fitness tracking app. Optimize training with AI coaching.
Supplement management app with barcode scanning, AI-powered intake timing suggestions, and reminder features.