Top Software Engineer Jobs in Japan

Lead the design, development, and optimization of scalable backend services supporting real-time ad recommendations and serving infrastructure. Own technical roadmaps, improve latency and throughput, enhance observability and incident management, collaborate with product and science teams, maintain code quality, mentor engineers, and participate in on-call rotations.

Develop, simulate, prototype, verify and debug GNC flight software for spacecraft using C/C++ and Python. Build dynamics, sensor/actuator models (USF-Sim), run Monte Carlo analyses, maintain CI/CD (GitLab), containerized environments (Docker), and document work in Jira/Confluence while collaborating with multidisciplinary teams.

As a Software Engineer at Spellbrush, you'll build advanced data pipelines and infrastructure to support AI research while collaborating with a talented team.

Build and ship native Android features for an AI-enabled neobank using Kotlin and modern Android architecture. Integrate backend APIs, improve performance and stability, use analytics to iterate, and design AI-assisted mobile experiences in collaboration with product and design.

Design and implement open source networking solutions, collaborate with cloud providers, and contribute to technical documentation and community efforts.

As a C# Software Engineer, you'll design and implement classes for document IDE, refactor code for extensibility, and interview users to understand needs.

Design, develop, and maintain cloud-based analytics applications for life sciences supply chain operations. Build scalable backend services, provide architectural guidance, write high-performance code, and collaborate with data scientists, architects, product teams, and QA. Contribute to product strategy, estimate and track complex initiatives, support Agile development, and participate throughout the software development lifecycle.

Develop and optimize real-time onboard autonomy software for heavy vehicles, including perception, sensor fusion, planning execution, control, and safety monitoring. Maintain middleware for sensor ingestion, ensure deterministic latency and throughput, implement ASIL-relevant fault detection and recovery, build diagnostics and observability, write unit/integration/HIL tests, contribute to CI/CD, and productionize research into efficient C++ deployments.

Design and implement high-performance control modules for off-road autonomous vehicles. Characterize vehicle dynamics, close sim-to-real gaps, and build optimal-control solutions (e.g., nonlinear MPC, MPPI). Test controllers on production vehicles and collaborate with customer engineers to deploy robust autonomy under real-world constraints.

Installs, upgrades, and provides technical support for KD/ACE enterprise software products. Manages beta deployments and customer product adoption projects, supports headquarters and business units, and develops customized Python scripts. Requires Oracle and PL/SQL, Linux administration, shell scripting, programming in C, C++, Python, or Perl, enterprise application maintenance, software documentation, problem-solving, and business-level Japanese and English.

Provide global support for IFS business applications in the manufacturing domain: resolve medium-complexity customer issues, meet SLA/KPI targets, execute maintenance, share knowledge, train colleagues, and propose process improvements to increase customer satisfaction.

Develop and integrate embedded vehicle software into the Vehicle OS using C/C++ and Simulink. Work directly with customers to port and integrate features, manage vehicle integration timelines, set up SIL/HIL testing across timezones, influence technical strategy, and ensure high-quality production software.

Build and maintain hardened Ubuntu-based container images and the automated CI/CD pipelines to build, test, scan, sign, publish, and retire them. Integrate upstream open-source projects, ensure security and cloud-native compatibility, collaborate with cross-functional teams, document and share knowledge, mentor colleagues, and contribute to hiring. Work in a distributed agile environment with occasional travel.

Design, implement, and maintain Python-based systems and automation tools. Build and optimize scalable distributed systems, CI/CD pipelines, and automated test frameworks. Integrate device hardware and testing tools, debug video streaming products, and write clean, testable Python code while collaborating with cross-functional global teams.

Develop and maintain the Comet APAC Structured Products platform for equity derivatives covering pre-trade and post-trade pricing, trade capture, legal documentation and client connectivity. Write code and unit tests, participate in code/design reviews, ensure scalable performant secure code, collaborate with global and cross-functional teams, and provide second-level support.

The role involves developing the Guidance Navigation Control subsystem for a lunar lander, including algorithm design, testing, and integration with teams for operation preparation and troubleshooting.

Collaborate with engineers to extend compiler/toolchain for high-performance ML model deployment on AI hardware. Requires significant software engineering experience and knowledge of ML.

Join Valeo as a VIE Software Engineer, supporting software project management and quality assurance in a dynamic, multicultural environment focused on automotive innovation.

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

Integrate, test, qualify, and release AD/ADAS software for mass-production vehicles. Responsibilities include managing release schedules and quality, building CI/CD systems, validating application, middleware, and operating-system integration, monitoring resource usage, coordinating issue resolution, distributing versioned software, and preparing audit documentation. The role collaborates with internal engineers, external vendors, development tools, and testing teams, requiring automotive or embedded-product experience and fluent Japanese.

Lead the architecture, design, coding, integration, testing, documentation, and support of highly reliable embedded software for lunar landers and spacecraft systems. Translate system requirements into software designs, select processors and technologies, develop BSPs, and support functions including attitude control, communications, power and data management, command systems, and fault protection. Coordinate with subsystem engineers, suppliers, customers, and internal teams while managing schedules, quality, costs, technical issues, and software engineering teams.

Develops high-reliability embedded software for lunar landers and spacecraft systems. Responsibilities include deriving software requirements, designing architectures, selecting processors and protocols, developing BSPs and device drivers, coding, integration, testing, documentation, and fault analysis. Collaborates with avionics, ground-segment, systems, suppliers, customers, and other engineering teams while managing schedules, costs, quality, tasks, and technical issues.

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.

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.