L2 Software Engineer - Web

Posted 2 Days Ago
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Tokyo, JPN
In-Office
Senior level
Blockchain • Fintech • Financial Services • Cryptocurrency
The Role
Design, build, and maintain high-traffic web products with a focus on performance, scalability, accessibility, SEO, and user experience. Own engineering workstreams, reusable components, content tooling, hosting, CDN, caching, security, releases, and production investigations. Collaborate with Product and Design, review code, improve testing and documentation, and promote AI-first development practices.
Summary Generated by Built In

With millions of wallets created and a global audience, Bitcoin.com is one of the world's leading crypto content and onboarding platforms. We are looking for an experienced Senior Web Engineer to design, build, and improve our web products, with a strong focus on performance, scalability, and user experience. You will take ownership of key engineering workstreams, collaborate closely with Product and Design, and leverage AI-first development practices to deliver high-quality solutions. Join us in bringing crypto to the next billion users. 

Location: Tokyo office
In the office 3 days a week, but the initial 2 months 5 days a week 

Key Responsibilities

  • Design, build and ship features across our web products, from scoping to production
  • Be the main engineering contact for Product and Design on your workstreams
  • Build reusable components and content tooling so non-engineers can create and update pages themselves
  • Keep our sites fast, accessible and SEO/GEO optimised across many languages
  • Own hosting and delivery: environments, CDN and caching, security rules, DNS and domains
  • Support releases and lead the investigation of production issues
  • Review code and raise the bar on quality, testing and documentation
  • Work AI-first, and help the team get more out of AI coding tools

What We Are Looking For 

Required 

  • 5 years (or more) of professional web development, including senior-level work on high-traffic production sites
  • Expert TypeScript, React and Next.js
  • Headless CMS experience: content models and editor workflows that non-engineers actually use
  • Strong web performance, accessibility and technical SEO: Core Web Vitals, rendering strategies, structured data
  • Comfortable with server-side JavaScript and APIs (REST, GraphQL)
  • Hands-on with Vercel, AWS or Cloudflare: deployments, CDN and caching, firewall rules, DNS, logs and monitoring
  • Secure web development practices
  • Fluent with AI coding tools like Claude Code, with the judgment to know when the output can’t be trusted
  • Clear written and verbal English, strong presentation skills, and a self-driven work style
  • BS in Computer Science or equivalent experience

Nice to Have

  • Monorepos and design systems
  • CI/CD and infrastructure as code
  • Internationalisation at scale
  • Automated and end-to-end testing (e.g. Playwright)
  • Monitoring and analytics tools (Sentry, New Relic)
  • Crypto or fintech products, including Web3 wallet integrations
  • Content in regulated industries

Why Join Us

  • Be part of a mission-driven company pushing crypto inclusion
  • Work on high-impact features used by millions daily
  • Flexible, modern, remote-friendly environment
  • Culture of ownership, craftsmanship, and learning

Skills Required

  • At least 5 years of professional web development experience, including senior-level work on high-traffic production sites
  • Expertise in TypeScript, React, and Next.js
  • Headless CMS experience, including content models and editor workflows
  • Strong web performance, accessibility, and technical SEO experience
  • Experience with server-side JavaScript and REST or GraphQL APIs
  • Experience with Vercel, AWS, or Cloudflare, including deployments, CDN, caching, firewall rules, DNS, logs, and monitoring
  • Secure web development experience
  • Fluency with AI coding tools such as Claude Code
  • Clear written and verbal English, strong presentation skills, and a self-driven work style
  • Bachelor of Science in Computer Science or equivalent experience
  • Monorepo and design systems experience
  • CI/CD and infrastructure as code experience
  • Internationalization at scale experience
  • Automated and end-to-end testing experience, such as Playwright
  • Monitoring and analytics tools experience, such as Sentry or New Relic
  • Crypto or fintech product experience, including Web3 wallet integrations
  • Experience creating content in regulated industries
Am I A Good Fit?
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The Company
205 Employees
Year Founded: 2015

What We Do

Bitcoin.com is a global cryptocurrency platform founded in 2015 that helps people understand, acquire, hold, and spend Bitcoin and other digital assets. Its mission is to create more economic freedom in the world through peer-to-peer electronic cash and self-custody. It operates a non-custodial multichain wallet app trusted by millions, a fiat-to-crypto on-ramp, market data, news, and educational resources, making it easy for anyone to buy, sell, trade, invest, earn, and learn about crypto.

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