Top Software Engineer Jobs in Tokyo

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.

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.

Develop and maintain high-security mobile applications using React Native, Swift, or Kotlin. Implement biometric authentication and secure key storage, collaborate with cross-functional teams to deliver features, troubleshoot and optimize performance, and recommend improvements based on emerging technologies.

Develop, optimize, test, and document Soroban smart contracts on the Stellar network for cross-border payment solutions. Integrate anchor services, collaborate with cross-functional teams, debug and support deployments, and stay current with blockchain and payments developments.

Implement and optimize EVM-compatible features, reduce gas usage, develop and validate smart contracts, collaborate on Ethereum infrastructure, provide technical support, and stay current with Ethereum advancements.

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.

Dragonfly is seeking Software Engineers for various portfolio companies, focusing on crypto technologies. Engineers of all experience levels are needed across multiple stacks.

Seeking software engineers with at least 2 years of production backend experience, interested in crypto and blockchain technologies, for roles with portfolio companies.

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.

Responsible for managing software and customer tickets, supporting project teams, and ensuring compliance with process timelines and quality standards in software development.

Lead and coach a software engineering team, partner with product to prioritise work, ensure technical quality and delivery, remove blockers, oversee rituals, and drive strategic decisions to align team output with company goals.

Design, develop, and maintain scalable, high-performance BIM backend systems. Build APIs and services to integrate AI, prototype unified ingestion/storage for 3D/AEC data, collaborate with product teams, and ensure monitoring, performance, and cost-balanced architecture.

As a Telematics Software Integrator Engineer, you'll be responsible for managing software requirements, ticket handling, and facilitating collaboration between teams to enhance software quality and efficiency.

Lead backend architecture and build scalable, high-concurrency services and APIs (Node.js) powering web and mobile. Own components end-to-end, manage CI/CD and infrastructure (IaC, containers, cloud), improve reliability, and collaborate with PM/design to deliver core features like live interactions and checkout.

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

The Software Engineer in Test III will develop and execute automated tests, maintain testing tools, analyze defects, and ensure product testability within TraceLink's software solutions.

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

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

Lead technical delivery across web, mobile, API, and data integration workstreams; act as primary client-facing technical contact (Japanese); translate business requirements into technical specs, manage risks and timelines, review architecture and code quality, coordinate cross-functional stakeholders, and contribute hands-on when needed to ensure predictable production delivery.

The Senior Software Engineer will address design and technical challenges in the Japanese energy market, focusing on Python and Django for robust software solutions, alongside domain modeling and API integration.

The role involves supporting software systems for autonomous vehicles, managing CI/CD pipelines, and integrating C/C++ software in a DevOps environment.

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