Mobile Frontend Developer

Stonelab Official โ€” South Korea ยท Posted ~23 hours ago

Mid Full-time

Skills

Mobile application development Mobile architecture REST APIs Asynchronous programming OAuth 2.0 JWT Authentication Authorization SSE WebSockets Unit testing Integration testing UI testing Performance optimization Mobile observability Debugging REST API Flutter React Native Crashlytics Sentry CI/CD

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Summary

Develop and maintain reliable, scalable mobile applications for innovative digital health and lifestyle solutions. You will design mobile architectures, integrate APIs and real-time data flows, strengthen security, optimize performance, and build well-tested features. The role offers technical ownership, continuous learning, flexible working hours, strong benefits, and access to advanced development resources.

Highlights

Opportunity to build impactful mobile technology in a collaborative startup, with flexible hours, professional development, modern equipment, research support, health coverage, housing assistance, and conference participation.

Description

Hello, all. StoneLab is a rapidly growing startup which possesses and advances novel techs for digital bio-healthcare and lifestyle solutions, with a focus on digital diagnostics (bio-analytics) and digital therapeutics (mental health). As our unique products move toward broader global market adoption, we are looking for SW professionals who enjoy observing our contribution to real-world healthcare and lifestyle innovation. With the reinforcement of our service capabilities proportional to the increasing market, we are currently hiring for the following full-time positions: Mid-Level Mobile Frontend DeveloperSenior Mobile Frontend Developer We welcome applications from candidates with diverse professional backgrounds who meet the role requirements. Responsibilities Design, develop, deploy, and maintain mobile applicationsBuild responsive, reliable, and scalable mobile features and architecturesImprove application performance, responsiveness, stability, and resource efficiencyImplement secure authentication, authorization, and data handling practicesIntegrate and maintain real-time communication and streaming featuresWrite clean, maintainable, and well-tested codeParticipate in code reviews, debugging, and continuous improvement efforts Requirements 3+ years of mobile application development experienceExperience building and maintaining production-grade mobile applicationsStrong understanding of mobile application architecture and lifecycle managementExperience integrating REST APIs and handling asynchronous data flowsExperience implementing authentication and authorization flows (OAuth2, JWT, session/token management)Experience with Server-Sent Events (SSE), WebSockets, or other real-time/data streaming technologiesExperience testing mobile applications, including unit testing, integration testing, and UI testingExperience improving mobile app performance, including:Memory usage optimizationApp startup time improvementsRendering/UI performance optimizationNetwork and battery usage optimizationDebugging crashes, freezes, and performance bottlenecksExperience with mobile app monitoring and observability tools, such as:Crash reporting and diagnostics (Crashlytics, Sentry, etc.)Analytics and user behavior trackingPerformance monitoring and logging Preferred Qualifications Experience with CI/CD pipelines for mobile application development and deploymentExperience with one or more cross-platform frameworks such as Flutter or React NativeExperience with app release management for App Store and Google Play Why Join StoneLab? Collaborate on impactful digital healthcare and lifestyle technology products.Contribute to AI solutions with potential real-world impact.Take on challenging technical problems in a collaborative startup environment.Grow through continuous learning, technical ownership, and professional development.Enjoy flexible working hours and employee benefits.Receive compensation based on role, experience, qualifications, and internal compensation standards. How to Apply Please apply through LinkedIn and refer to stonelab.aiYou may also send your CV, portfolio, publications, or GitHub profile to: careers@stonelab.aiQualified candidates will be contacted by email regarding the next steps in the hiring process. Privileges Housing support (up to KRW 20 mil for deposit, 50% of a monthly rent) and meal support are provided in accordance with internal regulation.Annual monthly health checkup and personalized clinical program support. Coverage of medical insurance and employee accident insurance.Access to high quality R&D resources for retraining: latest equipment provision (mac, 4K monitor, AI service subscription, etc.)Seminar/conference/fair participation and travel support (accommodation, transportation, expenditures)Engagement in workshops and communication with our worldwide research partners. Equal Opportunity Statement StoneLab is committed to fair and job-related hiring practices. Hiring decisions are based on qualifications, skills, experience, and business needs. We do not make hiring decisions based on characteristics unrelated to job performance or any status protected by applicable law.