Japan
Published on: November 13, 2026
This fast-growing financial technology business is developing digital payment and banking services for a broad customer base. Its international team brings together people from a wide range of backgrounds, creating an environment where different perspectives can shape products and ways of working.
The culture is grounded in ambition, curiosity and a willingness to challenge convention. Rather than relying on a fixed view of what the future should look like, the business encourages its people to explore new possibilities, take thoughtful risks and keep improving its services. Joining the organisation means contributing to meaningful work in a changing financial services landscape, while helping to build an evolving engineering environment and growing your expertise alongside colleagues across disciplines.
As a Backend Engineer, you will help renew core banking systems through a ground-up development project. Working within a newly forming team, you will contribute across the full lifecycle, from planning and architecture through to implementation and operation. You will develop backend applications primarily in Java or Kotlin, designing for the performance, stability and reliability expected of a financial platform.
You will translate application requirements into technical designs, select suitable middleware and make effective use of infrastructure to address system challenges. The role also includes tuning microservices, configuring monitoring and responding to alerts. You will work closely with engineers and stakeholders to establish effective development practices and shape the team’s environment. The project is expected to involve working with an affiliated banking organisation. Based in Tokyo, Japan, this is a permanent position.
Three to five years’ experience in backend development, including practical Java experience.
Strong programming skills and a sound understanding of data structures, algorithms and object-oriented programming.
Experience designing database schemas for relational and NoSQL databases, and writing efficient queries.
Experience developing and tuning web applications, with attention to security.
Business-level spoken English.
Professional software development experience using AI or large language model tools, such as ChatGPT, GitHub Copilot, Gemini or similar.
A logical approach to problem-solving, clear communication and a strong sense of ownership.
Experience in financial services, AWS, microservices, RESTful APIs, Pub/Sub systems or database clients would be advantageous.
Experience designing scalable applications or products that handle high transaction volumes would be beneficial.
Japanese business proficiency, equivalent to native level or JLPT N1/N2, is an advantage.
Experience integrating AI-assisted development into system design and delivery, contributing to AI open-source projects or automating workflows with AI would be a plus.
As part of our hiring process, this role may use Keystone AI’s artificial intelligence or automated tools to assist with reviewing and screening applications. These tools support, but do not replace, human judgment in making hiring decisions.
Your application will be considered complete only after you have completed the full registration process on the Keystone AI platform, including creating your profile, uploading your CV, and submitting your application. The AI interview is optional but encouraged and is not required for your application to be considered.
By submitting your personal data and/or resume, you give consent to collection, use and disclosure of your personal data and/or resume by the company (or its agent) for the purpose of the processing and administration by the company relating to this job application. Read our Privacy Policy.
CGP Group is an affirmative equal-opportunity employer and recruitment firm. We evaluate qualified applicants without regard to race, color, religion, creed, gender, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class. Information provided in this advertisement is for recruitment purposes only.