Develop and maintain the iOS version of the Teachme Biz service, focusing on UI renewal and overall development.
Leads banking, B2B fintech, or card-system projects through customer discussions, requirements, quality reviews, launch, and operations, coordinating teams, vendors, schedules, risks, and resources.
Develops frontend features for online consultation and clinic-DX services, covering implementation, testing, reviews, releases and process improvements across a healthcare platform.
Technical Project Manager supporting Apple Pay E-Commerce integrations with merchants and payment providers, resolving issues, guiding implementations, and coordinating projects.
Leads a four-person Android team, combining people management and hiring with development-process improvements, cross-team coordination and hands-on Kotlin app work. The role also covers Android quality and incident response.
Freelance developers from any technical background are welcome. Tell us what you’re interested in, and we’ll email you when a matching project comes through Ranked or our partner network.
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.
Lead engineering teams building Fanicon and other THECOO products.
Design and develop both frontend and backend applications for therapeutic apps and related services in a digital therapeutics team, using TypeScript, Prisma, GraphQL, React, and Redwood.js.
Senior Systems Engineer handling requirements, design, quality management, project support, and operations for banking, digital solution, or card-system projects.
Leads web and app development projects from client discussions and requirements definition through team setup, release, and ongoing operations, coordinating designers and engineers.
Build SpeakBuddy’s iOS learning app in Swift, owning features from planning to release and delivering microphone handling, UI and animation, testing, operations, and quality improvements.
Develop and operate the pixiv Sketch iOS app with Swift, delivering features, improving quality through testing and refactoring, collecting data for analysis, and coordinating with other disciplines.
Develop Android apps, SDKs, libraries, and tools for game content. Use Kotlin to improve performance, investigate defects, implement server communication, and update development environments.
Datadog is hiring a Technical Escalations Engineer 2 focused on RUM. The position is listed for Tokyo, Seoul, and Sydney, but detailed responsibilities are not provided.
Lead quality design and test engineering for in-vehicle taxi systems, covering Android, hardware, networks and location services. Build CI/CD and automated E2E testing, improve simulation environments, and conduct field tests.
Develop Android applications for Smaregi’s payment service, improve client-side features, and incorporate user feedback into requirements and fixes.
Manage banking, digital-solution, or card-system projects, coordinating clients, schedules, risks, quality, releases, and operations. Remote work is available by consultation.
Develop Android applications for the Teachme Biz service, including architecture design and UI/UX improvements.
Develop and operate USEN PAY’s payment platform across frontend, backend, cloud infrastructure, testing and monitoring. Use TypeScript, React, Kotlin, Spring Boot, AWS and Terraform to build merchant tools and new services, improve performance, strengthen reliability, and support scalable architecture.
Develop and improve Android applications used in taxi vehicles, including driver, passenger-tablet, payment, GPS, Bluetooth, serial communication, and MQTT functions. The role supports reliable mobility services and future autonomous taxi systems.
Design and develop iOS native applications, improve UI/UX, and collaborate with teams on service development.
Develop and improve Pococha’s iOS app for live streaming and community events, implementing features, refining UI interactions, improving stability, and modernizing its foundation.