Backend Engineer

**About the company:** eMotion Fleet Shinagawa-ku, Tokyo Our Fleet and Energy Management System integrates EV charging, telematics, and depot electrification to help logistics and transit operators decarbonize, cut operating costs, and maximize fleet uptime. Read more **Responsibilities:** Build backend features across the application and API layer Build features in our Python/FastAPI application and contribute to data modeling and API contracts, working within the architecture set by the team Backend feature development planning and execution Work hands-on with cloud infrastructure and DevOps Manage and improve our AWS environment (EC2, RDS, S3, IAM, and related services) Maintain and evolve CI/CD pipelines and infrastructure-as-code Contribute to monitoring, alerting, and observability tooling Take part in incident response for backend and infrastructure issues, helping diagnose and resolve production problems Collaborate with frontend engineers on API design and integration, and contribute to frontend work as needed Make pragmatic trade-offs between engineering rigor and business speed, and communicate those trade-offs clearly Communicate progress, blockers, and technical decisions proactively and asynchronously Requirements 3+ years of backend engineering experience, with strong Python skills Experience building and maintaining production APIs with FastAPI or a comparable Python framework Hands-on AWS experience: you have worked with EC2, RDS, S3, IAM, and related services in a production environment Experience with infrastructure-as-code tools Experience setting up and maintaining CI/CD pipelines (GitHub Actions or equivalent) Strong database skills: schema design, query optimization, and management of PostgreSQL or similar Experience with Docker and containerized deployments Fluent English (written and spoken) for async collaboration across a multilingual team High agency: you identify problems, propose solutions, and act on your own initiative Comfort with ambiguity: you can scope, sequence, and ship work even when requirements are incomplete AI tools are a vital part of your workflow, and you pay close attention to how the space is evolving Technical expertise is the foundation. What determines whether someone thrives at eMotion Fleet is a set of working qualities we care just as much about: Ownership, not just delivery. You take end-to-end responsibility for what you build, including validating it against customer needs and surfacing problems proactively. Bias towards shipping, not perfectionism. You find a way forward when conditions aren’t ideal and make practical calls about what needs to be right from the start versus what can be refined later. Problem-solving under uncertainty. You give problems a genuine attempt before asking for help, and when you do ask, you come prepared with what you’ve already tried. Strong async communication. You keep others informed of your thinking and progress proactively and move conversations toward decisions. Nice to haves While not specifically required, tell us if you have any of the following. Experience with observability tooling Familiarity with event-driven architectures or messaging systems Comfortable developing frontend features (TypeScript, React, Next.js) or directing AI to do it; you can get frontend work done independently without pulling in a frontend engineer for every task Experience with IoT data pipelines or real-time telemetry systems Japanese language skills (conversational or above) Compensation ¥7,000,000 ~ ¥9,000,000 annually. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION About eMotion Fleet eMotion Fleet Shinagawa-ku, Tokyo Our Fleet and Energy Management System integrates EV charging, telematics, and depot electrification to help logistics and transit operators decarbonize, cut operating costs, and maximize fleet uptime. Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. © 2026 Privacy Policy **Requirements:** 3+ years of backend engineering experience, with strong Python skills Experience building and maintaining production APIs with FastAPI or a comparable Python framework Hands-on AWS experience: you have worked with EC2, RDS, S3, IAM, and related services in a production environment Experience with infrastructure-as-code tools Experience setting up and maintaining CI/CD pipelines (GitHub Actions or equivalent) Strong database skills: schema design, query optimization, and management of PostgreSQL or similar Experience with Docker and containerized deployments Fluent English (written and spoken) for async collaboration across a multilingual team High agency: you identify problems, propose solutions, and act on your own initiative Comfort with ambiguity: you can scope, sequence, and ship work even when requirements are incomplete AI tools are a vital part of your workflow, and you pay close attention to how the space is evolving Technical expertise is the foundation. What determines whether someone thrives at eMotion Fleet is a set of working qualities we care just as much about: Ownership, not just delivery. You take end-to-end responsibility for what you build, including validating it against customer needs and surfacing problems proactively. Bias towards shipping, not perfectionism. You find a way forward when conditions aren’t ideal and make practical calls about what needs to be right from the start versus what can be refined later. Problem-solving under uncertainty. You give problems a genuine attempt before asking for help, and when you do ask, you come prepared with what you’ve already tried. Strong async communication. You keep others informed of your thinking and progress proactively and move conversations toward decisions. **Nice to have:** While not specifically required, tell us if you have any of the following. Experience with observability tooling Familiarity with event-driven architectures or messaging systems Comfortable developing frontend features (TypeScript, React, Next.js) or directing AI to do it; you can get frontend work done independently without pulling in a frontend engineer for every task Experience with IoT data pipelines or real-time telemetry systems Japanese language skills (conversational or above) **Compensation:** ¥7,000,000 ~ ¥9,000,000 annually. APPLY FOR THIS POSITION DO YOU NEED MORE INFO? ASK A QUESTION About eMotion Fleet eMotion Fleet Shinagawa-ku, Tokyo Our Fleet and Energy Management System integrates EV charging, telematics, and depot electrification to help logistics and transit operators decarbonize, cut operating costs, and maximize fleet uptime. Read more More jobs like this We'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, we don't share or sell it. © 2026 Privacy Policy