Senior Software Engineer

Date PostedMay 26, 2026LocationTaito, Tokyo, JapanCompanyTalentus K.K.SalaryJPY 8500K - JPY 12000KTypeit (pc, web, unix) - tech lead/lead engineer it (pc, web, unix) - back-end engineer it (pc, web, unix) - fullstack engineer

Job Summary

You will lead the end-to-end development of new applications on a high-growth AI-powered data platform. The role involves making key architectural decisions, domain modeling, and collaborating with cross-functional teams in a global environment. You will be responsible for building high-performing, scalable software solutions within a fast-moving, entrepreneurial team.

Responsibilities

  • Lead end-to-end application development
  • Define architecture and domain modeling
  • Collaborate with global cross-functional teams
  • Scale high-performing engineering teams

Required Skills

  • 7+ years Cloud (GCP/AWS/Azure) experience
  • Expertise in Rust/TypeScript/Node.js
  • Strong system architecture design skills
  • Fluent English (TOEIC 865+)

Job Details

Job Description - Contribute to the development of new applications built on top of the core platform of the business. - You’ll be part of a fast-moving, entrepreneurial team building entirely new value from zero. - Lead the end-to-end development of the application from scratch, including technology selection, domain modeling, and overall architecture design. - Collaborate closely with cross-functional teams such as product managers, designers, and engineers across multiple teams to ensure successful delivery. - Play a key role in building a high-performing, globally-oriented engineering team that primarily operates in English. Development Environment - Frontend: TypeScript, React, Next.js - Backend: TypeScript, Rust(axum), Node.js (Express, Fastify, NestJS) - Infrastructure: Docker, Google Cloud, Kubernetes, Istio, Cloudflare - Event Bus: Cloud Pub/Sub - DevOps: GitHub, GitHub Actions, ArgoCD, Kustomize, Helm, Terraform, Datadog, MixPanel, Sentry - Data: CloudSQL(PostgreSQL), AlloyDB, BigQuery, dbt, trocco - API: GraphQL, REST, gRPC - Authentication: Auth0 Job Requirements - 7+ years of hands-on professional experience building web applications on cloud platforms like GCP, AWS, and Azure. - Successfully led web application development projects with teams of 5+ members. - Experience leading architecture design initiatives. - Experience in researching and developing core functionality and technically complex aspects of products for at least 3 years. - Fluent English communication skills (TOEIC 865+).