Summary
✨ AI‑Generated
A fast-growing technology organization is seeking a Full-Stack Web Product Engineer to build and improve B2B SaaS applications. You will develop frontend and backend features, APIs, and web applications while collaborating with product, business, sales, and engineering teams. The role offers the opportunity to work on customer-facing functionality with measurable business impact and contribute across a broader technology ecosystem. The environment uses Go, TypeScript, React, MySQL, Redis, AWS, Kubernetes, Docker, and GitHub Actions, with growing adoption of generative AI in engineering. Fully remote work is available within Japan.
Highlights
Work on impactful full-stack B2B SaaS products in the mobility technology sector, with opportunities to influence customer adoption and business KPIs. The role offers fully remote work within Japan, cross-functional collaboration, exposure to a modern cloud-native stack, and active adoption of generative AI in engineering.
Description
🚀 Hiring: Web Product Engineer | Full-Stack | Tokyo / Fully Remote in Japan
I’m currently looking for a Web Product Engineer to join a fast-growing tech company transforming the mobility industry through technology.
You’ll work on a B2B SaaS product used by 15,000+ companies, helping businesses manage corporate taxi transportation, payments, ride history, and more.
What you'll work on:
Full-stack development across frontend & backendBuilding and improving B2B SaaS productsDeveloping APIs and web applicationsCollaborating closely with Product, Business, Sales, and other engineering teamsWorking on features that directly impact customer adoption and business KPIsContributing to multiple products within a large-scale mobility ecosystem
Tech stack:
Backend: Go, Echo, MySQL, Redis
Frontend: TypeScript, React, Flutter, MUI
Infrastructure: AWS, Kubernetes, Docker, S3, CloudFront
CI/CD: GitHub Actions
The company is also actively adopting Generative AI across engineering, with tools including GitHub Copilot, Claude Code, Gemini, Cursor, and more.
What we're looking for:
3+ years of experience developing and operating web applications and backend APIsStrong frontend experience with JavaScript/TypeScript & ReactExperience across requirements definition, design, development, and testingExperience working in cross-functional teamsExperience with Git/GitHub-based developmentHigh Business Japanese level minimum (N1) is mandatory
Experience with Go, backend/frontend architecture, large-scale services, Kubernetes, database design, or Generative AI would be a plus.
Why consider it?
¥8M–¥12M annual salaryFully remote within JapanSuper-flexible working hours, no core timeWork on products with a real-world social impactDirect exposure to customers and business stakeholdersOpportunity to work across multiple products and domainsStrong engineering culture with learning programs, tech events, study groups, and an Engineer Challenge WeekTwice-yearly salary reviews
If you're a full-stack engineer who enjoys taking ownership beyond just writing code, understanding business problems, and building products that have a measurable impact, please apply to this role !
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