Top Software Engineer Jobs in Tokyo

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.

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.

Design, build, and optimize scalable backend systems for an ads management platform on cloud (primarily AWS). Develop product features and internal tools, maintain core platform reliability and performance, and collaborate cross-functionally with US and Japan teams. Use agentic AI-assisted development practices; work early JST hours Tue–Fri and participate in occasional in-person meetings.

Lead design, development, and delivery of cloud-native, microservice-based software products. Drive DevSecOps/CI-CD practices, API/system integration, quality assurance, customer-facing solution design, project leadership, and adoption of AI/IoT/digital-twin technologies.

The Senior Software Engineer in Test builds and executes automated tests, develops testing tools, and collaborates on technical designs while ensuring system testability for the TraceLink platform.

Design, implement, and maintain scalable, high-availability backend brokerage systems for Japan. Build gRPC/REST microservices, integrate with Japan market infrastructure and vendors, ensure regulatory compliance, participate in on-call rotations, troubleshoot incidents, and collaborate across global teams while mentoring and driving regional engineering efforts.

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

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

The Senior Software Engineer will develop a document IDE, improve performance, refactor code, interview users, and propose innovative features.

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.

Build end-to-end software features across frontend, backend, and AI components. Responsibilities include developing interfaces, APIs, backend services, data pipelines, automation workflows, and LLM-powered applications such as RAG systems and AI agents. The role involves testing, documentation, debugging, cross-functional collaboration, product iteration, and using AI coding tools to improve development speed and quality.

Bring Unity's real-time 3D runtime to embedded Android and AAOS in automotive, integrate Unity into native Android apps, build graphics/windowing layers, profile and optimize runtime on constrained SoCs, collaborate with OEMs to resolve issues, and raise engineering quality through design, reviews, and automated testing.

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.

Build core components of a diagnostic and personalization platform: backend data pipelines, frontends, services for genomic data ingestion, ML model integration, APIs, and cloud infrastructure. Collaborate with product and ML teams, iterate on prototypes and MVPs, and make architectural decisions supporting scalability and reliability.

Design and build the on-prem software stack for ModelVault appliances: containerized inference engines, model integration (LLMs/vision), deployment tooling, CLIs/GUI/APIs, OS and GPU setup, remote updates, telemetry, and collaborate with customers and founding team to iterate and scale the engineering org.

Design, develop, maintain, and optimize backend and big-data systems for Binance's Web3 security domain. Build scalable, high-concurrency services, improve security tooling and threat detection, work with data teams on collection and processing, and collaborate with cross-functional and global stakeholders to deliver security-focused technical solutions.

Develop and deploy ML and classical perception systems for L4 autonomous trucks: design/train 3D detection models across LiDAR/camera/radar, build sensor-fusion and tracking pipelines, operate data engines, validate safety-critical capabilities through simulation and on-road validation.

Design, implement, and verify firmware and embedded software for humanoids, dual-arm robots, robotic hands, and teleoperation systems. Develop low-level control platforms, device drivers, communications (CAN/UART/SPI/I2C/Ethernet), logging/diagnostics, and interfaces to ROS/ROS2. Conduct real-robot testing, failure analysis, and system integration with mechanical, electrical, AI, and cloud teams to improve reliability and reproducibility for research data collection.

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.

The Senior Software Engineer designs, develops, integrates, and debugs software for Biomek automated systems, collaborating with customers and R&D teams while managing projects and requirements.

As a Senior QA Engineer, you will develop automated testing strategies for a decentralized trading platform, focusing on E2E and API testing, while validating execution paths and collaborating across teams.

As a Senior Backend Engineer, you'll enhance Mapbox's EV data infrastructure, designing data pipelines and APIs while ensuring data quality and scaling services for global EV coverage.

The Software Engineer will integrate customer software into the Vehicle OS, manage project timelines, and ensure high-quality software delivery for complex embedded systems.

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.