Top Software Engineer Jobs in Japan

Design, build, and maintain backend services and reliability tooling to improve availability and resiliency. Implement CI/CD, infrastructure-as-code, observability (SLIs/SLOs/telemetry), incident management, and automation to reduce toil and drive measurable reliability improvements.

Lead technical design and delivery of API-driven, cloud-native integration solutions. Translate business requirements into scalable architectures, perform code reviews, mentor engineers, support production issues, and apply AI-assisted engineering practices to improve productivity and solution quality.

Lead design, development, testing, and maintenance of cloud-native Java/Spring Boot full-stack applications on Microsoft Azure. Build REST APIs and microservices, implement containerized deployments (AKS/Docker), CI/CD, mentor engineers, troubleshoot production issues, and drive architecture and engineering best practices.

Lead architecture, modernization, and delivery of enterprise Direct Marketing digital platforms. Drive end-to-end full stack engineering, remain hands-on in coding and troubleshooting, and lead AI/Generative AI initiatives from PoC to production. Partner with stakeholders to convert business needs into scalable, secure solutions supporting customers, agencies, partners, call centers, and internal users.

Design, develop, and maintain enterprise applications focused on business rules and decision services. Author, test, deploy, debug, and optimize IBM ODM (v9.x) rule projects. Collaborate bilingually (Japanese/English) with local and global teams, follow Agile practices, and support CI/CD and TDD processes.

Design, develop, and deploy secure software and data pipelines to transform patient data into real-world evidence. Build web apps and scalable automated pipelines, ensure data quality and tests, address security and privacy constraints, and occasionally deploy and operate solutions at hospital partner sites.

The Forward Deployed Software Engineer designs and implements data-driven solutions for clients, collaborating with diverse teams to tackle complex problems and drive impactful results.

Join the Japan Payments Technology team to design, develop, and troubleshoot secure, scalable software. Write high-quality code, apply automation, interpret architecture, analyze data for troubleshooting, address code quality, and contribute to an inclusive team culture while growing technical skills.

Design, develop, and deploy secure software to transform patient data into real-world evidence. Lead architecture and data extraction/web application efforts, troubleshoot complex hospital infrastructure during on-site deployments, mentor engineers, and collaborate with clinicians, product, and data teams to deliver high-quality data products.

Develop software for network functions, tune Linux kernels, create module specifications, and support product certifications while collaborating internally and externally.

Lead backend design and development for a mobile-first strategy-building fintech: build scalable Python/FastAPI services, real-time APIs/WebSockets, integrate market data providers, optimize performance across large datasets and simulations, contribute front-end React/TypeScript work, maintain containerized deployments and CI/CD pipelines, and document and collaborate in an async-first team.

Develop and maintain features for Westlaw Japan and its next-generation platform using front-end and back-end technologies. Work with senior engineers to understand architecture, fix defects, participate in code reviews, follow Agile processes, and collaborate with product and QA to deliver secure, high-performance legal research software.

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

As a Robotics Control Systems team member, design and maintain robotics control software, focusing on multi-robot control, path planning, and task allocation. Collaborate on architecture, improve processes, and address customer challenges while ensuring user-focused development.

The Senior Robotics Engineer will design, optimize localization and SLAM algorithms, create perception modules, and mentor junior engineers while ensuring production-quality software deployment.

Build and ship native Android features for an AI-enabled neobank using Kotlin. Integrate backend APIs, improve performance and reliability, collaborate with product/design, and implement on-device AI where it improves user journeys.

Develop, commission, configure, and support software systems integrated with industrial equipment. Diagnose hardware/software issues, manage industrial communication protocols and fieldbus systems, train customers and teams, ensure compliance with standards, and perform on-site commissioning and support.

The Software Engineer will design, develop, and maintain robust APIs, oversee backend API performance, and collaborate with cross-functional teams to align architecture with product strategy.

The Senior iOS Engineer will lead engineering decisions, develop the Speechify iOS app, maintain app architecture, and ensure user experiences delight customers.

Seeking a Senior iOS Engineer to lead engineering decisions, enhance the iOS app, and maintain app architecture while supporting a growing user base.

The Software Engineer will build data ingestion pipelines, manage cloud infrastructure, and collaborate on AI dataset roadmaps for model training operations.

The Software Engineer will enhance data collection and ingestion pipelines, optimize cloud infrastructure, and collaborate on AI datasets for Speechify's products.

Build and own end-to-end customer-facing features for web and mobile. Develop backend services and RESTful APIs in Node.js/TypeScript, responsive frontends in React/Next.js, integrate AI/LLM features, work with AWS infrastructure, ensure observability and security, contribute to CI/CD and testing, and mentor junior engineers in an Agile team.

The Principal Application Software Engineer will lead the integration and validation of AI software on automotive platforms, focusing on hardware interaction and performance in Japan.

Join Canonical as a Go Software Engineer to enhance developer workflows and build tools integrated with Ubuntu and modern SDKs, focusing on performance and user experience.