Top Software Engineer Jobs in Tokyo

Leads the design, development, delivery, and operation of enterprise full-stack applications using Java, Spring Boot, modern web technologies, and Microsoft Azure. Defines cloud-native architecture, microservices, engineering standards, testing, CI/CD, and operational practices. Manages, mentors, and develops software engineering teams while overseeing resources, delivery schedules, technical initiatives, modernization efforts, and stakeholder expectations. The role also drives engineering excellence, talent acquisition, and strategic technology decisions.

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.

Leads solution discovery, functional analysis, UX conceptualization, user-story development, Agile delivery, production support, and functional analysis team management. Collaborates with product owners, Scrum masters, developers, and support partners to design and deliver digital solutions. Requires extensive system design, development, operations, and maintenance experience, plus strong knowledge of Java, JavaScript, Spring Boot, React, relational databases, cloud technologies, project management, communication, and problem solving. English-Japanese bilingual proficiency is preferred.

Develop real-time motion-control software for robotic manipulators, including inverse kinematics, collision avoidance, trajectory generation, time parameterization, compliance control, actuator integration, and ROS2-based systems. Build production-ready robotics software and simulation environments using MoveIt and Gazebo. The role requires advanced C++ development on Linux, robotics control theory, motor-control expertise, and integration of industrial communication protocols.

Design, deploy, and scale production AI systems and applications. Responsibilities include building data pipelines, tuning and hardening models, collaborating with researchers, engineers, and product managers, monitoring live models, tracking AI advances, conducting code reviews, and owning solutions end to end amid changing priorities.

Build, operate, and enhance low-latency Python applications supporting Rates trading desks with real-time risk, PnL, and decision-support capabilities. Responsibilities include production support, troubleshooting, system design, performance optimization, monitoring, incident response, and delivery of resilient services. The role partners closely with traders, leads technical initiatives, mentors engineers, and promotes secure, responsible use of AI-assisted development tools.

Leads hands-on engineering of high-performance Linux infrastructure for low-latency electronic trading. Designs deployment models, containerized platforms, provisioning pipelines, and production automation; optimizes kernel, CPU, NUMA, networking, and timing performance. Drives responsible AI-assisted engineering practices, governance, vendor collaboration, reliability, and reusable solutions. Partners with trading businesses, influences technical strategy and budgets, and mentors engineers and SRE teams.

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 and adapt software products for global automotive and autonomy customers. Collaborate with customers, engineering, product, and sales teams to understand technical needs, prioritize roadmap requirements, conduct workshops, support customer deployments, and identify new product opportunities. The role combines software engineering, autonomy domain knowledge, customer engagement, and technical problem-solving, with strong English and Japanese communication required.

Design, develop, maintain, and deploy reliable backend services for the Robot Platform; improve test coverage, CI/CD, and monitoring; collaborate cross-functionally; monitor and troubleshoot production services and occasionally travel to Woven City for on-site maintenance.

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.

The Senior Full-Stack Software Engineer will design and develop full-stack cloud services for enterprise clients, ensuring code quality and potentially mentoring a small 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.

Build full-stack tools, backend services, APIs, dashboards, and data workflows for assessing and improving AI training data and evaluations. Partner with quality and research teams to inspect agent trajectories, validate graders, measure quality, investigate workflow issues, and turn internal prototypes into reliable production platform capabilities.

Develop and maintain scalable Python applications, APIs, microservices, and data pipelines using PySpark and Airflow. Deploy and operate solutions on Azure with Docker and Kubernetes, implementing monitoring, logging, alerting, and production support. Collaborate with product managers, data scientists, and engineering teams on global projects while contributing to coding standards, architecture, testing, documentation, and Agile delivery.

Participate in full-stack development and maintenance of Binance’s KYC system, including backend services, frontend features, documentation, testing, regression, troubleshooting, and customer issue resolution. The role is a 3–6 month accelerator internship for current university students and recent graduates, with an emphasis on Java, Spring Boot, databases, middleware, and frontend technologies.

Design and build interfaces for HUD’s AI agent training, evaluation, and marketplace products. Translate complex reinforcement learning workflows, agent runs, evaluation results, reward signals, and quality feedback into clear, actionable experiences. Collaborate with users, researchers, and engineers to ship polished products, conduct user discovery, improve usability, and develop reusable interaction patterns.

Build and operate high-scale backend, platform, data, and ML infrastructure for Auxia’s agentic AI platform. Responsibilities may include Kubernetes infrastructure, real-time ingestion, Kotlin and gRPC microservices, recommendation engines, model serving, developer tooling, and enterprise integrations. Engineers own systems end to end, including design, deployment, monitoring, and optimization across a multi-tenant, multi-region environment.

Develop, deploy, debug, and optimize software components for Intel Open Edge platforms. Build AI applications for robotics, generative AI, and visual analytics; troubleshoot Linux installations; optimize AI pipelines across CPUs, GPUs, and NPUs; analyze benchmarks; create technical documentation and demos; and support customers across Asia-Pacific.

Participate in developing and maintaining Binance’s KYB backend system. Document business-module interfaces, support functional and regression testing, track bugs with QA, troubleshoot reported issues, and help customer-support teams resolve and classify problems. The role requires Java, Spring microservices, MySQL, NoSQL, middleware, strong communication, and teamwork. It is part of a 3–6 month accelerator internship for current students and recent graduates.

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.

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.

Supports the full software quality lifecycle, including requirements analysis, test design, manual and automated testing, defect management, and reporting. Develops automated tests using Selenium or Playwright and integrates them with CI/CD pipelines and cloud platforms. Serves as an English-Japanese communication bridge across onshore and offshore teams, participates in Agile ceremonies, and applies AI, agentic workflows, prompt engineering, Copilot, and RAG to improve test coverage, defect analysis, and delivery efficiency.

Develop and optimize games and production tools for external customers using Unity. Collaborate with customer and internal teams, scope and plan projects, solve complex technical issues, profile CPU/GPU/memory performance, support diverse platforms, provide consultations and training, and communicate technical guidance in Japanese and English.

Provide front-line production support and troubleshooting for U.S. equities execution infrastructure during Asia hours. Maintain exchange connectivity, resolve order rejects, develop Python monitoring/diagnostic tools, coordinate incidents with exchanges and global teams, participate in testing and ensure production readiness.