Top Software Engineer Jobs in Yokohama

Build and maintain mobile-first, responsive front-end applications using React and TypeScript. Integrate with REST and WebSocket backends, implement state management, create data visualizations, optimize performance for real-time datasets, translate Figma designs into components, write front-end tests, and collaborate remotely with a global team.

Build and scale Base360.ai: design APIs, services, and cloud-native infrastructure; implement event-driven automations, AI-powered workflows, and integrations (Airbnb, Stripe, Twilio, OpenAI). Own projects end-to-end to automate operations, improve pricing and guest experiences, and enable global scaling.

The Software Engineer will build data ingestion pipelines, manage cloud infrastructure, and collaborate on AI dataset roadmaps for model training operations.

Early-career software engineer role contributing backend/full-stack feature development, testing, CI/CD, and production releases. Collaborate on API/module design, system integration, and deployment. Support engineering of AI/LLM features (LLM APIs, basic RAG, embeddings/agents), maintain datasets/benchmarks, track performance, debug issues, and produce technical documentation.

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.

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.

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.

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 design and development of embedded Linux systems for automotive applications, including drivers, middleware, and camera sensor integration. Create technical specs, optimize security and real-time performance, troubleshoot and debug, ensure adherence to automotive standards (ISO 26262, AUTOSAR), mentor junior engineers, and collaborate with system and validation teams.

The Senior iOS Engineer at Speechify will lead product decisions, ship production code, enhance app architecture, and participate in product discussions while ensuring a great user experience.

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.

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.

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.

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

Join a portfolio company as a Software Engineer to work on a performance-sensitive stack for crypto's dark pool, focusing on full onchain systems.

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

Lead technical and architectural direction for HERE Map and Services in Japan. Solve complex, ambiguous, cross-team problems, drive engineering excellence, design scalable systems, perform code and design reviews, and promote AI and modern tooling to improve productivity and quality.

The Software Engineer will design, develop, and maintain robust APIs, oversee backend services, and collaborate with cross-functional teams while focusing on scalability and performance.

Build and architect Base360.ai: design and launch booking, pricing, payments, operations, and AI-powered automation. Integrate platforms (Airbnb, Stripe, Twilio, OpenAI), scale systems internationally, and embed AI workflows to automate operations and optimize revenue.

Join a technical team at Build.io to improve its PaaS, focusing on software development, automation, and infrastructure while supporting customer needs.

Design, develop, release, and maintain large-scale web and mobile applications for India. Collaborate with product and cross-functional teams, write frontend (React)/backend (Java/Ruby/Python) code, lead architecture and integration decisions, mentor engineers, manage production severity incidents, drive refactoring and best practices, and work with Security, IT Ops, and QA to ensure quality delivery.

Early-career backend engineer role in the Binance Accelerator Program. Contribute to product development and maintenance, write and maintain interface documentation, troubleshoot QA issues, and assist customer service with problem resolution and classification for system improvements.