About Takuya
Senior full-stack engineer specialising in TypeScript across the stack: React and React Native on the front end, Next.js for web, and Node.js/NestJS (plus Ruby on Rails) on the back end. Over the past 6 years I've shipped and maintained production systems end-to-end, owning data model and API design, polished UI, testing, release and incident response. I work best as an embedded contractor who can take an ambiguous problem and return a shipped, tested result with minimal hand-holding. I'm happy to start with a small, scoped deliverable so we can confirm the fit before anything bigger. Available remotely, working European (CET) hours.
English
Native or bilingual
Japanese
Native or bilingual
Remote only
Primarily works remotely
Experience
- Ticket Resale PlatformEngineering Manager / Full-Stack EngineerApril 2025 - Today (1 year and 4 months)Led the setup of a new engineering organization as development lead: hired two engineers and owned the roadmap, QA and release lifecycle, and delivery metrics such as MTTR. Drove payment-method expansion (card, PayPay, Apple Pay, in-house points) across web and app, installment payments, campaign features, a sports-ticket seat-information schema and a feature-flag system, plus security hardening (3DS tamper protection, Rails console sandboxing) and CI/CD optimization. Stack: TypeScript, Ruby on Rails, React Native, Astro, MySQL, Redis, AWS, Terraform.
- Restaurant Cloud POS PlatformFull-Stack EngineerSeptember 2023 - March 2025 (1 year and 6 months)Product Feature Development:• - Drawer password feature (new auth flow for settlement / inspection operations)• - Layout redesign for major POS slips: settlement, inspection, sales-info, and monthly-closing• - Coupon improvements (locked coupon detail / upcoming display / empty state / lottery-related UI)• - archive feature support — non-display of archived entities across platforms
- Stockmark Inc.Full-Stack EngineerJuly 2023 - March 2025 (1 year and 8 months)Product Feature Development:• - Org tagging feature• - Notification feature improvement and re-architecture• - Follow list feature• - Article category classification feature• - Mobile project dev environment improvement and mobile SSO• - Grape API coding rules (API edition / exception handling), I18n / timezone / canary DB migration documentation
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Education
- AWS Certified Solutions Architect – AssociateAWS Certified Solutions Architect – Associate
- Rikkyo University2012