[Hiring] Backend Engineer @KOMOJU

Role Description

We are looking for a backend engineer to help us build our platform to handle payments on a global scale. You will primarily work with Ruby, building out features using Ruby on Rails (90% of tasks). As we’re still scaling our front-end team, you may be asked occasionally to work on front-end tasks as well (Less than 5% of tasks). Additionally, there will be tasks related to Monitoring, Observability, etc., which uses Terraform and DataDog (< 5%).

• Typical tasks include adding new APIs for Front-end Interfaces in our Ruby on Rails application for customers to use.
• Investigating bugs with our partners to ensure customer payments go through smoothly.
• Improving our systems’ reliability and observability to ensure better health using Terraform.
• Work with product managers to critically evaluate requirements and implement them in code.
• Provide constructive feedback through code reviews and look at refactoring opportunities.
• Receive mentoring support from managers and senior developers to help develop your skills.

Qualifications

• Experience working with large web applications.
• Knowledge of building reliable and performant web applications.
• Strong knowledge of testing and different testing types.

Requirements

• Build backend systems using Ruby on Rails stack.
• Understand product goals and feature requests and translate them into working software.
• Work on large technical projects from design through implementation and delivery as part of a team.
• Ensure high-quality, reliable software - including thorough testing.
• Strong experience building backend systems using Ruby on Rails in production environments (Ruby experience preferred, but candidates with solid experience in other backend web frameworks are also welcome).
• Experience building scalable and performant web applications.
• Solid understanding of relational databases and SQL.
• Ability to design data models and system architectures.
• Strong technical communication skills - including the ability to document decisions clearly and concisely.
• Experience and understanding of common web vulnerabilities and how to mitigate them.
• Understanding of software architecture, design patterns, and best practices.

Nice to Haves

• Experience with TypeScript, Vue.js, or React.
• Experience with payments or payment systems.
• Experience with integrating with third-party APIs in a secure and fault-tolerant manner.
• Understanding of database performance characteristics and data access patterns.
• Familiarity with Monitoring and Observability techniques and platforms such as DataDog.

Benefits

• 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.
• Access to the O’Reilly Learning Platform.
• Language training for Japanese/English.
• Twice a week office lunch.