プログラミング＆開発 jobs

This role focuses on developing and enhancing mission‑criticalmission‑critical trading and portfolio management systems using modern C++. You will collaborate closely with quantitative and trading teams in a fully English‑speakingEnglish‑speaking workplace, with no Japanese language requirement

Design, build, and maintain scalable full-stack applications while ensuring high code quality, robust architecture, and adherence to modern development best practices. Lead technical initiatives, contribute to system design, and drive Agile delivery across cloud-native and event-driven environments.

Join a forward-thinking retail technology department as an iOS Developer, where you'll contribute to designing and developing innovative mobile applications. This temporary position in Tokyo offers an exciting opportunity to showcase your expertise in iOS development while working on impactful projects.

This is an exciting opportunity for a skilled Java Developer to contribute to innovative projects in the technology and telecoms industry. Based in Tokyo, the role requires expertise in Java programming and fluency in both Japanese and English to collaborate effectively across teams.

This is an exciting opportunity to contribute to innovative projects in the Technology & Telecoms industry. Based in Tokyo, the role focuses on creating seamless user interfaces and enhancing user experiences.

このポジションでは、Javaを使用したソフトウェア開発に携わり、プロジェクトの成功に貢献していただきます。バイリンガルスキルを活かし、グローバルな環境で活躍したい方に最適です。

We are seeking a highly skilled Senior Java professional to join a leading financial services company in Tokyo. The ideal candidate will leverage their technical expertise to deliver innovative solutions within the technology department.

This role leads the design, development, and operation of large‑scale Java‑based systems powering a major e‑commerce marketplace in Japan. You will drive technical decisions, ensure platform scalability and stability, and provide senior‑level leadership across projects and teams.

This role leads the design, development, and optimization of frontend systems for a large-scale online marketplace used by tens of millions of users. You will combine hands-on engineering with technical leadership to deliver high-performance, reliable, and user-centric web experiences.

This role leads detailed design and backend development for applications supporting a large-scale data platform. You will combine hands-on engineering with technical leadership, influencing architecture and long-term product direction.

This role focuses on building and evolving the core systems that support investment strategies. You will work hands-on with Java and Python in close collaboration with investment and trading professionals.

Data‑focused software engineering role centered on Python backend development, with NumPy and pandas as core, day‑to‑day requirements for data processing and analysis. The position also involves basic frontend work to support user‑facing features, making it ideal for someone comfortable working across backend, data, and light frontend layers.

This role involves designing and building secure, high‑performance Java backend systems for critical fintech products. You'll work with modern technologies in a fast‑paced environment where reliability, scalability, and security are essential.

This role offers the opportunity to design, build, and improve large‑scale Java‑based systems that support critical business operations. You will work closely with cross‑functional teams to deliver reliable, high‑quality solutions in a professional engineering environment.

This role is a Senior Full‑Stack Software Engineer position focused on building and maintaining enterprise‑scale internal applications using Python and modern JavaScript frameworks in a fully remote, agile environment. It offers long‑term stability, international collaboration, and strong potential for permanent conversion, with meaningful ownership over end‑to‑end technical solutions.

This role involves developing and maintaining scalable Python backend systems that support large‑volume, consumer-facing energy services. It requires strong bilingual Japanese-English communication skills and at least six years of Python experience to collaborate effectively in a cross-cultural engineering environment.

This role focuses on designing and scaling backend systems that power high‑volume merchant and payment platforms. You will take ownership of core services while influencing architecture and engineering best practices in a global team.

This role leads backend architecture, development, and technical direction for large-scale, high‑traffic e-commerce services. You will shape system scalability, performance and reliability while guiding complex projects and engineering teams.

You will design, build, and maintain highly scalable financial services that power the ecosystem.

You will work on large-scale distributed systems and help evolve the platform architecture to deliver the next generation of credit card experiences.

Join the well-built security team to develop the PKI software with the best talents.