Job Responsibilities

• Design, develop, and maintain scalable full-stack applications.
• Collaborate with cross-functional teams to design and ship features.
• Ensure performance, quality, and responsiveness; fix bottlenecks and bugs.
• Maintain code quality and automation; participate in code reviews.
• Mentor junior engineers and foster continuous learning.

Technical Stack

Required Skills

• 5+ years software development; 3+ years web app development (backend/frontend)
• Agile team experience; strong problem-solving; able to work independently and collaboratively
• Backend: Rails, GraphQL, RSpec; Go, Kotlin
• Frontend: Next.js, TypeScript, React, GraphQL, Node.js
• Database: MySQL, Redis
• Infrastructure: AWS (EKS), Docker, CircleCI
• Languages: English (conversational); Japanese (business)

Preferred Skills

• Leadership/management experience
• AI development or experience using AI tools to improve development processes
• Ruby on Rails and Kotlin experience (advantage)

Career Growth Perspective

• Opportunity to shape AI-driven product improvements under Money Forward’s AI roadmap
• Mentorship role with potential progression to tech lead/principal; influence on Cloud Tax Return, Cloud Business Registration, Cloud Company Registration
• Broad exposure across backend, frontend, and cloud infra to build deep, scalable expertise
• Supportive environment for learning and conference participation, library access, and cross-functional impact