Lead full-cycle development for the 'Resichare' app, focusing on server-side development and infrastructure management.
About this role
Kurashiru (dely) is hiring a backend/product engineer for its fast-growing Reshichalle savings app (built on the Kurashiru recipe-video platform; 44M+ downloads, 56M monthly users; Reshichalle at 10M+ downloads, 466% YoY growth) — leveraging one of Japan's largest first-party receipt/purchase datasets combined with AI. As a full-cycle product engineer you would own from problem definition through design, development and operation: designing and building new features in Ruby on Rails, refactoring, participating in maintenance/operations, improving API performance, writing unit/UI tests, making infrastructure changes via IaC, improving CI/CD, and raising code quality through reviews. Engineers work in cross-functional scrum teams (PdM, designer, BizDev) that each own KPIs, participating from "what to build" onward. Stack: Ruby 3 / Rails 7, Node.js, React; MySQL, Redis; Terraform; AWS (ECS, RDS, ElastiCache, DynamoDB, SQS, S3, Lambda); Snowflake, BigQuery, Athena; GitHub Actions. Each engineer gets a monthly AI-tooling budget (Claude Code, Codex). Business-level Japanese is expected. Full-time, based in Tokyo (Tamachi).
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