Senior Software Engineer (English Only OK)

Senior Software Engineer (Python) 📍 Tokyo, Japan | Hybrid Work 💰 ¥8.5M–¥12.5M annually 🗣️ English-speaking environment | Japanese Not Required

We are recruiting for a Senior Software Engineer (Python) to join a listed cloud security provider in Japan. Their flagship platform delivers an added layer of security for organizations operating in the cloud, offering functionalities such as access control, email filtering, online storage, and email archiving for thousands of enterprise customers.

In this role, you will help build and scale distributed, fault-tolerant cloud security systems targeting a 99.9% SLA. With a CEO who also serves as CTO, the engineering organization stays closely connected to technical decision-making and continuously explores modern technologies.

You will work within an international development team based in central Tokyo (Shibuya), bringing together engineers from more than 10 countries in a collaborative, English-speaking workplace.

What You'll Do

• Design, develop, and maintain new product features aligned with business needs
• Architect scalable, fault-tolerant systems for distributed cloud deployments
• Maintain code quality and reliability through automated testing, CI/CD pipelines, and clear documentation
• Partner with Design, Product Management, and Customer Success teams to iterate on the product
• Participate in technical discussions, conduct code reviews, and mentor junior engineers

What We're Looking For

• 5+ years of backend development experience using Python
• Strong background building scalable web applications in Python
• Experience with cloud infrastructure (AWS, GCP, or Azure)
• Ability to automate deployments using CI/CD pipelines
• Commitment to clean code, thorough documentation, and mentoring junior engineers
• Interest in open-source software and tech community engagement
• Professional fluency in English (Japanese is not required)

Tech Stack Python 3, asyncio, NoSQL, AWS, Docker

Why Consider This Opportunity?

• International engineering team representing over 10 nationalities in an English-speaking environment
• Flexible working hours and hybrid remote work options (Kanto area residency required)
• Financial support for technical certifications, learning programs, and domestic or international tech conferences
• Active engineering culture featuring monthly tech sessions, new business contests, weekly board game nights, and seasonal team events
• Full social insurance coverage, commuting allowance, and an Employee Stock Ownership Plan

Application Requirements

• Please note that an online coding test (completed in Python) is required as the first step of the selection process, along with submitting a CV and cover letter.

We have more opportunities available across different roles. If this position isn't the right fit for you, we'd still love to hear from you. Feel free to apply, and we can explore other opportunities that may match your experience and career goals.

Job ID: 02817