Job Description

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.

What to expect

We are product focused, meaning you will work on our payment gateway and any other projects towards building the future of KOMOJU. You will work with other engineers in a flat and inclusive culture where engineers have a say in both key product and technology 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, you are the main driver behind your growth and position in the company.

International at our core

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

Being an international company we know the importance of bilingualism. We offer all employees a choice between optional English and Japanese lessons to help create a culture of diversity and ensure smooth collaboration across teams.

About the position

We are looking for a senior backend engineer to help up build our platform to handle payments on a global scale. You will primarily work with Ruby, building out features using Ruby on Rails. As we’re still scaling our front-end team, you may be asked occasionally to work on front-end tasks as well.

As a senior engineer, you will need to work with our product managers to define requirements and convert that into a usable architecture, and then implement them in code. You will also provide constructive feedback through code reviews, as well as architecture discussions. As hiring and supporting new developers is important to us, you will be expected to be able to mentor junior developers, and work with them to improve their core skills.

Our ideal candidate has experience working with large web applications. They will know how to build reliable, scalable, and performant web applications. Testing and code quality are also extremely important to us, so having a strong knowledge of testing and the different testing types is required.

Responsibilities

• Build backend systems using Ruby on Rails stack
• Understand product goals and feature requests and translate them into working software
• Lead large technical projects from design through implementation and delivery
• Support team members through code review and architecture discussions
• Ensure high-quality, reliable software - including thorough testing, proactive monitoring, observability, and continuous improvement
• Identify high-leverage refactoring opportunities that improve team velocity, code clarity, and long-term maintainability

Requirements

• Experience with building performant and scalable APIs
• Solid understanding of database performance characteristics and data access patterns
• Ability to design data models and system architectures spanning multiple data stores (experience working with OLAP and OLTP databases)
• Hands-on experience with observability practices, including metrics, logging and tracing
• Strong technical communication skills - including the ability to document designs and decisions clearly and concisely
• Experience with integrating with third party APIs in a secure and fault-tolerant manner
• Experience and understanding of common web vulnerabilities and how to mitigate them
• Strong understanding of software architecture, design patterns and best practices

Nice to Haves

These aren't required, but be sure to mention them in your application if you have them.

• Experience with TypeScript, Vue.js and/or React
• Experience with payments or payment systems
• Business-level spoken Japanese

*We’re hiring for multiple openings across different seniority levels. The final title and scope of responsibilities will be determined based on your experience and performance throughout the interview process.

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

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