Top Software Engineer Jobs in Yokohama

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.

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.

You will design, develop, and maintain software for Edge AI devices, leveraging robust debugging skills and collaborating on innovative technologies.

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.

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.

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

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.

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.

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.

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.

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.

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.

Lead architecture and technical strategy for a data interoperability connector platform and SDK. Write production code, drive cross-team technical decisions, improve developer productivity, ensure reliability, lead incidents, act as Product Owner when needed, and mentor technical leaders across the domain.

Design, build, and operate scalable, highly available Threat Protection and ShadowAI services. Own features end-to-end, implement detections and policies for generative AI and web threats, maintain tests and SLOs, use AI-assisted tooling responsibly, and collaborate with product, security, and ops to deliver reliable, secure production services.

The Open Source Engineer will expand LanceDB's integration with big data systems, manage dataset operations, and enhance open-source community efforts.

Design, build, deploy, and operate backend features and services in a cloud environment. Ensure scalability, reliability, and performance, collaborate cross-functionally, use AI-assisted development tools, and reduce production incidents while meeting sprint and roadmap commitments.

Design and build scalable backend brokerage systems for Japan, develop gRPC/REST microservices and vendor integrations, translate regulatory requirements into technical specs, participate in on-call rotations, troubleshoot production incidents, and collaborate with global teams to support Japan market features like NISA and MyNumber.

Design and implement core Web3 protocol features and secure smart contracts in Solidity. Integrate blockchain solutions, optimize scalability and performance, review code, and mentor junior engineers while staying current on EVM internals and DeFi protocols.