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Job ID : 1586822 Date Updated : April 16th, 2026

Golang Backend Engineer for English speaker

Hiring Company AI monitoring app to protect children from dangerous chats and i
Location Available across Japan
Job Type Permanent Full-time
Salary 7 million yen ~ 10 million yen

Work Style

Remote Work and WFH Casual Clothing Side Business Ok Flex Time

Job Description

We are looking for a Backend Engineer to own the next layer platform. The immediate priority is building out utility integrations — WhatsApp, Instagram, and other communication channels — that extend how Kodomamo connects with users and surfaces risk signals. You will have real ownership over backend architecture and work closely with the CTO on system design.

What You'll Do

  • Design, build, and maintain backend services and APIs in Go and TypeScript.
  • Lead development of platform integrations with third-party services (WhatsApp Business API, Meta Graph API, etc.).
  • Collaborate with Flutter engineers on mobile-backend contracts and API design.
  • Write well-tested, maintainable code and contribute to thorough code reviews.
  • Diagnose and resolve production issues, ensuring high reliability and performance.
  • Contribute to backend architecture decisions as the platform scales.

Tech Stack

  • Backend: Go, TypeScript
  • Infra: Kubernetes, GCP
  • Mobile: Flutter

 

General Requirements

Minimum Experience Level Over 3 years
Career Level Mid Career
Minimum English Level Business Level (Amount Used: English Only)
Minimum Japanese Level None
Minimum Education Level High-School
Visa Status Permission to work in Japan required

Required Skills

Must-have:

  • 3+ years of professional Go development in a production environment.
  • Solid TypeScript skills — experience building backend services with Node.js or Deno.
  • Hands-on experience with Kubernetes in production (deployment, networking, RBAC).
  • Familiarity with GCP services (Cloud Run, GKE, Pub/Sub, IAM, or equivalent).
  • Experience designing RESTful APIs.
  • Strong written and spoken English.

Preferred:

  • Prior experience integrating with WhatsApp Business API, Twilio, or Meta's Graph API.
  • Experience with event-driven architectures.
  • Interest in AI safety, content moderation, or consumer app security.

 

Job Location

  • Available across Japan

Work Conditions

Job Type Permanent Full-time
Salary 7 million yen ~ 10 million yen
Industry Internet, Web Services

Job Category

Company Details

Company Type Small/Medium Company (300 employees or less)
Non-Japanese Ratio About half Japanese