Senior Frontend Engineer

Date PostedJune 22, 2026LocationTokyo, Shinjuku, JapanCompanyDejimal IncSalaryJPY 6000K - JPY 10000KTypeit (pc, web, unix) - front-end engineer it (pc, web, unix) - tech lead/lead engineer

Job Summary

We are seeking a Senior Frontend Engineer to drive development for our AI-powered chat platform, GENIEE CHAT. You will work within a modern tech stack (React, TypeScript, Go) to build new features that directly impact business performance. This role offers the opportunity to influence architecture, mentor team members, and utilize cutting-edge AI development tools.

Responsibilities

  • Design microservice architecture
  • Lead code reviews and technical decisions
  • Drive new feature development for GENIEE CHAT
  • Resolve technical debt and maintain system stability

Required Skills

  • 3+ years Go backend development
  • 3+ years React/TypeScript frontend development
  • 3+ years AWS practical experience
  • Proven team lead experience

Job Details

### Job Description - Design of microservice architecture. - Formulation of improvement policies, code review, technical decision-making, design review. - Planned resolution of technical debt (e.g., AWS SDK migration, legacy service modernization). - Technical judgment and lead of root cause investigation during incident response. ### Development Environment - Frontend: TypeScript, React, Vite - Backend: Python / Django, TypeScript / Node.js, Go - Infrastructure: AWS, GCP - Databases: RDS (MySQL), OpenSearch, ElastiCache (Valkey/Redis), DynamoDB, BigQuery - IaC: AWS CDK - CI/CD: Gitlab CI / CodeDeploy / CodePipeline - Monitoring: CloudWatch, PagerDuty, Amazon Managed Grafana ### Career Path - Mid-Term: Gain broad development experience as a full-stack engineer; manage AWS infrastructure compliant with standards like PCI-DSS. - Long-Term: Lead product feature development as a Tech Lead or manage development organizations. ### Working Hours - 10:00 AM - 7:00 PM (Closed on Saturdays, Sundays, and public holidays). ### Job Requirements - 3+ years of experience in backend development using Go (Web framework experience required). - 3+ years of experience in frontend development using React/TypeScript. - 3+ years of practical experience with AWS (DynamoDB, SQS/SNS, or ECS/EC). - Team lead experience (code review, design review, and technical decision-making). ### Benefits and Welfare - Book purchase subsidy (up to 30,000 yen per half-year). - Refreshment allowance (up to 5,000 yen per month). - Club activity allowance (up to 5,000 yen per month). - Housing allowance (up to 30,000 yen per month for specific areas). - Shuffle lunch/dinner and qualification acquisition support system. - Refreshment leave system (2 days annually after 3 years). - Regular health checkups and employee stock ownership plan. ### Insurance and Allowances - Comprehensive social insurance. - Full reimbursement of transportation expenses. - No smoking on company premises.