Top Software Engineer Jobs in Japan

Design and implement production-quality C++ vehicle control and estimation software using Model Predictive Control and control theory. Translate high-level requirements into implementable designs, negotiate implementation details, and validate performance from unit tests through integrated simulation and vehicle tests.

As a Senior iOS Engineer at Speechify, you will lead engineering decisions, ship production code, and enhance app architecture to support a growing user base.

The Software Engineer role involves designing, developing, and maintaining backend services, optimizing APIs, and collaborating with cross-functional teams for enterprise solutions.

The Software Engineer will improve developer experience and deployment processes by optimizing workflows, building tools, and enhancing software lifecycle reliability.

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.

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, implement, test, and integrate AD/ADAS motion planning and control software. Define requirements, write and review code, run simulations and real-vehicle tests, collaborate across teams, and improve development processes and CI/CD for productization.

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.

The Quantum Software Engineer will design, optimize, and troubleshoot quantum control workflows, working directly with customers and collaborating cross-functionally to develop scalable software solutions in Python.

Design, build, and operate a highly available, secure multicloud Kubernetes platform and cloud account vending service. Develop Kubernetes controllers and cloud services in Go, Python, and TypeScript, implement IaC and GitOps deployment patterns, create CI/CD automation and health checks, collaborate with SRE/observability teams, and mentor junior engineers.

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.

As a Software Engineer, you will develop a platform for creating and managing labeled datasets, collaborate with engineers, and deliver scalable data solutions.

Develop Flight Software for lunar lander Guidance, Navigation, and Control. Collaborate on GNC algorithms, perform design analysis, and support integration.

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 R&D Engineer, you'll design and develop software for ICP-MS instruments, ensuring high reliability and performance while addressing complex customer applications and mentoring junior engineers.

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.

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.

As a Full-Stack Software Engineer, you will design solutions for B2B commerce partnerships, develop APIs, and work on fintech and e-commerce stacks for APAC markets.

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.

Lead SDET and prompt-engineering efforts: propose and implement test automation strategies, design/develop/maintain API and UI test automation, integrate with DevOps/cloud, and develop LLM-based QA solutions including prompt design, evaluation, and agentization.