Senior Fullstack Engineer, Cross-platform
RemoteFull-timePosted 4mo ago
About the role
Senior cross-platform fullstack engineering role at Welltech focusing on AI-first, agentic development across mobile, web, BFF, and infrastructure with emphasis on scalable health & fitness applications and native media experiences.
Responsibilities
- Build and evolve a cross-platform ecosystem covering mobile, web, BFF, and infrastructure layers using an AI-first, agentic development approach
- Design scalable foundations for health & fitness applications powered by React Native and modern web technologies
- Work directly with product, design, and marketing stakeholders to rapidly translate business needs into scalable technical solutions and experiments
- Develop and continuously improve AI-agentic workflows across the full development lifecycle to increase team productivity, code quality, and delivery speed
- Develop shared platform capabilities, internal tooling, CI/CD pipelines, and AI-assisted workflows that improve development speed and product quality
- Work on native mobile integrations and advanced media experiences, including video playback, streaming, and HLS-based solutions
- Contribute to modular architectures, reusable systems, backend-driven UI solutions, and white-label application capabilities
- Build reliable and scalable integrations between frontend clients, BFF services, and platform infrastructure
- Participate in architecture discussions, code reviews, documentation, and continuous improvement of engineering workflows
Qualifications
- Strong commercial experience with React Native and modern TypeScript-based application development
- Solid understanding of full-stack architecture including mobile, web, BFF, and cloud/infrastructure layers
- Experience building scalable cross-platform systems and shared application foundations
- Deep understanding of software architecture, modular systems, scalability, and performance optimization
- Experience working with CI/CD pipelines, automation tooling, and modern developer workflows
- Strong engineering mindset focused on maintainability, reliability, testability, and fast iteration
- Comfortable working in AI-assisted or agentic development environments and adopting new AI-driven workflows quickly
- Experience with backend-driven UI architectures
Skills
Required:React NativeTypeScriptFull-stack architectureAI-assisted / agentic development workflowsCI/CD
Last updated Jul 23, 2026. Interested? Apply on the company site.
About Welltech
Your healthy life starts with us
Welltech creates mobile apps that help millions of people worldwide stay active and improve their health 🌎 Find the one that suits you best!
healthfitnesswellnessmobile apps
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