Lead backend-focused development of Akerun Digital ID, a multi-tenant SaaS. Define requirements, design and implement web applications, select technologies, and maintain the service.
Design and operate reliable payment and financial systems, covering transaction integrity, recovery, compliance, cloud infrastructure, and new financial products. The role requires 5+ years of web application experience and leadership across multiple technical domains.
Manage the Application Platform team supporting BUYMA development teams with backend modernization, microservices, SRE practices, cloud scalability, and AI-assisted development.
Lead AI-centered software architecture and development at STORES, building agent-driven development environments, improving products, and guiding high-difficulty projects across applications, infrastructure, and teams.
Design and operate commercial real-estate software covering real-time data integration, domain modeling, AI/LLM features, security, and rapid product development. Remote work is available.
Lead technology for healthcare products including an online medical consultation service. Design architectures, improve CI/CD and development processes, plan modernization, support prototypes, and guide engineers through code reviews.
Leads engineering teams for BUYMA, a cross-border C2C marketplace, coordinating development, architecture, process improvement, people management, and cross-functional projects.
Develops frontend features for online consultation and clinic-DX services, covering implementation, testing, reviews, releases and process improvements across a healthcare platform.
Full-Stack Engineer
AirX · AirX Tokyo head office
Full-stack engineer at air-mobility startup AirX, building its inventory, reservation, flight-operations or flight-control systems with Rails, Node.js/TypeScript, Elixir and React.
Design, implement, and improve the tebiki現場教育 web application, including AI search and editor features, while clarifying requirements and priorities with product, business, and design teams.
Work directly with customers to define and ship AI products for SME back-office operations, owning requirements, architecture, implementation and deployment across the full product lifecycle.
Build Builder Work’s full-stack products, including a data-driven matching engine, AI/LLM features, internal systems, and new qualification-support services from design through operations.
Manage software engineering teams across people, process, and project management, supporting member growth and organizational improvement in a real-estate technology business.
Software Engineer and Product Manager
AirX · AirX Tokyo Head Office
Plan, design and build AirX's inventory, booking, flight operations or flight control systems for helicopter and business-jet services, leading products from validation to release.
Design and develop applications for online medical services including curon, collaborating with product and design teams. The role may also cover operations, maintenance, improvements, technical selection and team building, with remote work available and two office days required weekly.
As an IAM Engineer, you will design and implement Money Forward's ID platform and provide technical leadership to engineering teams.
Develop VRoid Hub and VRoid SDK from planning through release, coding, reviewing code, making technical decisions, and using Ruby on Rails, React, AWS and Kubernetes.
Design and improve CLOMO’s Rails backend, weigh architectural choices, build features and performance improvements, and help the team strengthen long-term design quality.
Lead QA strategy and team management for Tebiki's SaaS products, building generative-AI test workflows, quality metrics, non-functional standards, and cross-product reliability practices.
Design, build, and operate Enigmo’s AI Platform for BUYMA, spanning search, data pipelines, MLOps, model-serving APIs, observability, reliability, and cost-conscious cloud architecture.
Develop and operate shared user-management, account, payment, and web-store platforms supporting multiple F2P and MMO online games. Design scalable systems, tune performance, and maintain reliable service operations.
Develop SaaS web applications for IoT access-control and keyless-rental services, focusing on backend design, operation, and performance. Remote work is available.
Lead payment and remittance projects across Pixiv services, coordinate business and engineering teams, and guide technology choices and delivery for frontend or backend development.