Top Software Engineer Jobs in Japan

Collaborate with teams to design, develop, and implement software solutions, ensuring code quality and deploying applications on Kubernetes and AWS.

Develop and maintain embedded software for router and LAN switch products. Design, code, test, and debug modules; collaborate cross-functionally with hardware, QA, and other software teams; research new technologies and contribute to architecture and feature design.

Design and ship deterministic, safety-critical motion planning systems for autonomous vehicles. Build reliable fallback planners for degraded perception and system faults, evaluate behavior at scale using simulation and logs, develop metrics and tools, and collaborate with perception, prediction, controls, safety, and remote assistance teams.

Senior/Staff Software Engineer for a Liquidity Platform at a crypto exchange. Design, build, and scale high-performance services supporting liquidity and trading infrastructure; collaborate with cross-functional teams; mentor engineers and drive technical direction.

Design, build, and maintain cross-platform mobile SDKs (iOS/Android/React Native/Flutter/Web). Deliver privacy-first, high-performance features, manage CI/CD and automated tests, ensure backward compatibility and SLOs, lead incident investigations, and mentor engineers while leveraging AI coding agents.

Develop and validate real-time driving planning and velocity-control algorithms for ADAS/autonomous vehicles. Implement embedded, safety-conscious software in C/C++/MATLAB/Simulink, evaluate performance with test vehicles and simulators, and collaborate cross-functionally to align software with vehicle controls and customer requirements.

Lead the design and development of Windows desktop applications, enforce best practices, collaborate with cross-functional teams, and ensure accessibility and reliability in software development.

As a Software Integration Engineer, you'll integrate our Warehouse Execution System into customer environments, translating operational needs and ensuring seamless deployment. Responsibilities include designing scalable solutions, conducting various testing phases, and collaborating with international teams.

Build and maintain open-source AI/ML platform capabilities for model training, evaluation, deployment, monitoring, and management. Implement integrations with AI/ML frameworks, collaborate with the global AI community, mentor junior engineers, and ensure customers have access to the latest AI tooling.

Build and operate production custody systems: signing service, key management, chain integrations, and transaction pipelines. Own end-to-end subsystems, integrate new chains, collaborate with cryptography on threshold signing and key recovery, write post-mortems, and produce clear async design docs and PRs.

Design and implement automated tests for R&D virtual orthodontic software. Create functional, regression, performance, and integration test automation; run and monitor test executions; analyze failures; collaborate with development, biomechanical engineers, and distributed automation teams within a Scrum environment.

Design and execute automated tests across APIs, web, and enterprise applications. Participate in release planning, write test plans and cases, diagnose bugs, collaborate with developers, and validate system quality before release. Maintain automated test suites and improve QA processes for data products and complex backend integrations.

Design, prototype, and implement scalable 3D CAD/CAM software and algorithms for medical device mass production. Collaborate across manufacturing, product, and QA teams to define requirements, draft architecture, optimize processes (including 3D printing and laser workflows), and mentor junior engineers throughout the full software lifecycle.

Design and build high-throughput reconciliation systems and data pipelines. Implement real-time (Flink) and batch (Hive) workflows, write complex SQL for validation and anomaly detection, collaborate with Finance/Risk/Product on reconciliation rules, optimize for low latency, and leverage AI/LLM tooling to automate triage and improve operations.

Lead design and implementation of scalable, high-performance backend services for traditional and AI-powered search. Own search architecture, optimize indexing/retrieval/ranking, build reusable frameworks, collaborate with data scientists on LLM-enabled search and agents, and deliver robust, low-latency solutions.

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.

Senior hands-on backend and data engineer to design, build, and operate AI-enabled finance workflows in Tokyo. Own end-to-end solutions from design through production, improve ETL/data pipelines and deployment workflows, apply LLMs/automation to developer and financial processes, mentor engineers, and partner with global stakeholders to deliver resilient, high-performance finance technology systems.

Deliver software integration, automation, and middleware solutions for Cisco customers. Design, deploy, migrate, and troubleshoot integrations; develop CI/CD pipelines and automation scripts; validate integrations in test environments; communicate with customers and internal teams; build reusable tools and documentation; apply secure coding, Agile/DevOps practices, and AI-driven automation to improve delivery efficiency.

Lead software design, optimization, and implementation to solve complex customer problems. Serve as technical focal point across teams, mentor junior engineers, translate business requirements into solution architectures, drive automation and orchestration, and produce documentation and training to enable customer technology transitions.

Lead the design and development of Windows desktop applications, enforce best practices, drive accessibility efforts, collaborate on UI/UX, and manage full feature lifecycle.

Join the Core Experiences Team to build and maintain foundational services, optimize functionality, and deliver solutions with a focus on simplicity and reliability.

Lead the design and development of Windows desktop applications, ensuring accessibility, performance, and maintainability while collaborating with cross-functional teams.

The Senior Software Engineer will enhance Speechify's user experience by developing and maintaining core services using Kotlin, optimizing functionality, and collaborating with product teams.

The Senior Software Engineer will focus on building and maintaining SDKs and services for Speechify's product, optimizing functionality, and collaborating with product teams to enhance user experience.

As a Software Development Engineer II on the POI Search & Relevance team, you will design and implement search algorithms, improve efficiency, and collaborate across teams to optimize the search engine's performance and relevance for users.