Tokyo

Senior Site Reliability Engineer

Tokyo
Remote OK - Anywhere in Japan
Full-time
August 1, 2025

About KOMOJU

KOMOJU (by Degica) is the leading cross-border payment gateway for Japan. We power payments for companies like video game distribution platform Steam and the popular mobile app TikTok. Today we help thousands of merchants by providing them with the payment infrastructure they need through developer-friendly API’s to integrations on popular platforms like Shopify and Wix; we help our merchants grow in all markets they are expanding.

About the position

As a Site Reliability Engineer (SRE) at Degica, you will play a critical role at the intersection of software engineering and infrastructure operations. This position is ideal for engineers who are passionate about automation, systems design, and building scalable, reliable platforms.

In this role, you won’t be limited to just managing cloud infrastructure—you will take ownership of the platform's overall health, performance, and developer experience. Your work will span:

Cloud Infrastructure Management: Architect, implement, and maintain robust and secure infrastructure in a cloud-native environment using Terraform. You'll ensure high availability, scalability, and resilience of our systems.
CI/CD and Deployment Automation: Design and improve continuous integration and continuous delivery pipelines that empower development teams to ship software reliably and rapidly.
Observability & Monitoring: Implement end-to-end observability tooling—including metrics, logging, distributed tracing, and alerting—to provide real-time insight into platform performance and help reduce mean time to detection and resolution.
Platform Quality & Reliability: Champion best practices for reliability, scalability, and performance across engineering teams.

You’ll collaborate closely with developers, security engineers, and product stakeholders to ensure our systems meet both technical and business goals.

Responsibilities

Actively participate in improving and maintaining our AWS infrastructure
Continuously improving the system performance, reliability and secutiry
Design, implement, and maintain our observability stack (metrics, logging, tracing, dashboards).
Correspond with engineering teams to instrument applications for better observability.
Improving developer productivity with tooling
Securing the system and adhere to compliance
Be part of the teams on-call rotation

Requirements

2+ years in SRE roles working with the AWS platform.
2+ years experience in a software development role
Hands-on experience with observability tools, preferably Datadog.
Proficiency in Terraform.
Proficiency in at least one scripting or programming language (Ruby/Rails, Python, Go, Shell Script, etc.).
Experience on working with CI/CD tools such as GitHub Actions, Jenkins, Circle CI, etc.

Nice to have

Strong communication skills to work closely with outside companies and various departments inside the organization
Knowledge of TCP/IP and other networking protocols
Experience with AWS Direct connect

Benefits

At Degica, we embrace remote work while also offering office space for those who prefer in-person collaboration
10 days regular vacation, additional 5 days summer and 5 days winter vacation
Paid birthday holiday
Budget for self-learning allowance, to ensure our employees’ skills remain current
Language training for Japanese
On-call duties come with an allowance.

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About KOMOJU

Global payments made simple

KOMOJU is the leading cross-border payment gateway for Japan. They power payments for companies like the video game distribution platform Steam and the popular mobile app TikTok. Today, they help thousands of merchants by providing the payment infrastructure they need, from developer-friendly APIs to integrations on popular platforms like Shopify and Wix. They help merchants grow in all the markets they are expanding into.

Developer-centric, inclusive culture

Engineers at KOMOJU work in a developer-centric and inclusive culture where engineers have a say in both product and technical decisions. The culture is largely self-organizing, which means engineers have both a stake and ownership in what they work on. Engineers play to their strengths, but are also able to invest in areas where they want to grow within the team. At KOMOJU, engineers are the main drivers behind their growth and position in the company.

International at core

Around half of the team members come from outside Japan. English is the primary language used within the engineering team, and throughout the company many people are bilingual.

As an international company, KOMOJU understands the importance of bilingualism. They offer all employees a choice between optional English and Japanese lessons to help create a culture of diversity and ensure smooth collaboration across teams.

Passionate about technology

Developers at KOMOJU are passionate about their craft. To foster innovation, they have a monthly open hack day where developers can work on whatever they want. It could be trying a new programming language or tool, fixing a long-standing annoyance, or something fun and experimental, like building a game.

Japanese Language Policy
With around half of KOMOJU’s total members (and around 90% of engineers) coming from outside Japan, teams generally use English for written communication(e.g. Slack, Github).

Verbal communication is also primarily in English.

However, quite a few people can speak both English and Japanese fluently, so Japanese may be spoken at times during meetings, especially when they involve teams other than engineering.

Overall, the language spoken depends on the team. The dev team uses mostly English, but the HR team (for example) speaks primarily Japanese.
Visa Sponsorship
KOMOJU sponsors visas for candidates living outside of Japan. KOMOJU also helps out with relocation (searching for apartments etc.) but they don’t have a formal policy for this. The support offered depends on each individual case. They do always pay for flight tickets to Japan in the case that someone moves from abroad.
Paid Leave
KOMOJU offers annual leave starting at 10 days, an extra paid holiday on employees’ birthdays, 5 additional vacation days that can be used during the summer months, and another 5 days of year-end holidays.
Benefits
💻 New tech gear

👩‍🎓 Skill development support

💛 Support for attending conferences

💜 Seminar participation support

📕 Book purchases

🍔 Free lunch

🍹 Free drinks

👶 Parental Leave

👩‍🏫 Language Learning Support (Language courses)

💚 Translation support (EN<>JP)

💟 Complete health and social insurance

🚃 Commuter allowance
Engineer Interview Process
Engineering Roles

KOMOJU aims to keep their hiring process thoughtful and efficient. Typically, it involves 3–4 stages depending on the role:
- Initial Screening
- Take-home Exercise
- Technical Interview (Team Interview)
- Final Interview with Leadership
Throughout the process, the team evaluates technical skills and looks for alignment with team culture and potential for long-term growth.
Work style
KOMOJU operates as a remote-first company while placing a strong emphasis on personal connections and close collaboration. The company maintains an office in the Kichijoji area of Tokyo, which employees are welcome to visit for in-person collaboration and company events, such as weekly lunches provided at no cost.

Team members have the flexibility to work from anywhere within Japan, as well as up to three months per year from abroad. KOMOJU also offers flexible scheduling, allowing employees to set their own hours as long as they are available during the company’s core hours, Monday to Friday from 10:00 to 15:00 JST.