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HIRE TYPESCRIPT DEVELOPER
Senior TypeScript engineer shipping type-safe web products with React, Next.js, and modern tooling. Available for SPAs, design systems, and full-stack delivery — remote, worldwide.
Last updated: May 2026
START A CONVERSATIONWhy hire me
TypeScript-first architecture
Strict type safety across the entire stack — generics, discriminated unions, and shared type contracts between frontend and backend. Fewer runtime bugs, faster refactors, and better developer experience.
React & Next.js integration
Built production apps with React, Next.js App Router, and Server Components using strict TypeScript. Deep expertise in component libraries, state management, and type-safe API integration.
Remote-native collaboration
Structured daily standups, async updates via Slack/Linear, and weekly video check-ins when needed. Based in Japan, collaborating with teams across APAC, EU, and US.
Full-stack type safety
TypeScript from frontend to backend — tRPC, GraphQL codegen, and shared type schemas. One language across the stack with end-to-end type safety and fewer integration bugs.
What you get
- Next.js marketing sites and landing pages with App Router
- Headless CMS integration (WordPress, Contentful, Sanity)
- Design system implementation with Tailwind CSS
- Performance optimization — LCP, INP, CLS, and caching strategy
- Firebase/Supabase backend integration and serverless APIs
How it works
Requirements
Definition of content models, complete page inventory, primary user flows, and technical constraints including CMS selection, authentication requirements, payment integration needs, and internationalization strategy.
Design System
Component library built in Tailwind CSS with consistent typography scales, semantic color tokens, spacing systems, and accessibility baselines meeting WCAG 2.1 AA standards — ensuring visual cohesion across all pages and devices.
Development
Next.js App Router implementation using Server Components for data fetching, dynamic route handlers for localized content, API route handlers for form submissions, and headless CMS integration for marketing team autonomy.
Performance
Image optimization with WebP/AVIF formats and responsive srcsets, font subsetting to minimize layout shift, strategic third-party script loading with defer and async attributes, and caching rules tuned for both static and dynamic content.
Launch
Vercel deployment configuration with custom domain setup, staging and production environment separation, analytics verification across GA4 and Search Console, and post-launch monitoring for error rates and Core Web Vitals regression.
Recent delivery
Deckbase
Learn with decks, FSRS spaced repetition, rich templates, and AI-assisted card creation.
Case study →
LoA
Mindful app usage: pause before distracting apps with intention, gratitude, and affirmations.
Case study →
AgentOS
Observe, organize, and control AI agents across tools — Claude Code, Cursor, and more.
Case study →Engagement
Fractional Lead
2–3 days per week embedded with your team. Ideal for ongoing roadmap delivery, architecture decisions, and mentoring while you scale.
Project-Based Delivery
Fixed-scope sprints (4–8 weeks) with clear milestones. Best for MVPs, feature launches, and greenfield builds.
Advisory Retainer
Architecture review, code audits, and technical strategy on a monthly basis. Perfect for teams that need senior oversight without full-time commitment.
Trust
8+
Years experience
4+
Apps shipped
24h
Response time
1 week
Paid trial
Trusted at
Testimonials
Yosuke migrated our entire codebase to TypeScript. Bugs in production dropped by 60% within the first month.
— CTO, Health Tech Company
The TypeScript architecture Yosuke designed made onboarding new developers effortless. Our team productivity skyrocketed.
— Engineering Manager, Fintech