Senior Mobile Developer

Job Description: Senior Founding Mobile Engineer (Flutter) About Stimuler Stimuler is a global consumer app for English fluency, built at the intersection of voice AI and mobile . We’ve scaled to 9M+ installs , 100K+ paying users , across 180+ countries , with ~90% of revenue from outside India . We’re backed by Lightspeed , won Google Play’s Best AI App award, and were the only mobile app from India selected for the AWS GenAI Accelerator 2025 .

We’re building a rare kind of company from India: global-first, product-led, and deeply technical. Role Overview We’re hiring a Senior Founding Mobile Engineer (Flutter) to work directly with our CTO and lead mobile development for our app. This is a high-ownership role: you’ll drive architecture, performance, reliability, and developer velocity, while taking on technically hard problems in real-time voice/AI experiences on mobile.

Prior Flutter experience is a plus. If you’re an exceptional mobile engineer (Android/iOS/React Native) who can pick up Flutter quickly, we would love to talk. What You’ll Do Own the mobile app end-to-end : architecture, core implementation, release management, and long-term scalability. Lead Flutter development : establish patterns, reusable components, code quality standards, and technical roadmap.

Build and ship voice/AI-first mobile experiences (low latency, streaming, real-time UX constraints). Drive performance optimisation : app startup time, memory usage, jank reduction, audio pipeline efficiency, battery/network usage. Ensure production-grade reliability : crash monitoring, analytics instrumentation, observability, debugging workflows, and incident response.

Collaborate closely with the CTO and product/design to translate product goals into robust engineering outcomes. What We’re Looking For Must-have 5+ years building and shipping production mobile apps at scale (consumer apps preferred). Strong fundamentals: data structures, concurrency, networking, performance profiling, debugging.

Experience working with large-scale apps : modularisation, CI/CD, release discipline, and monitoring. High ownership mindset: you ship, you measure, you improve. Strong plus Strong Flutter + Dart experience (or deep expertise in Android/Kotlin or iOS/Swift with demonstrated ability to ramp fast). Experience with real-time audio/voice , streaming, WebRTC, low-latency systems, or similar.

Experience integrating AI/ML features into mobile products (inference, streaming APIs, on-device constraints). Experience with growth/product engineering: experimentation frameworks, feature flags, analytics, and onboarding funnels. Location / Work Mode Bengaluru, In-office Compensation 35-50L Base + ESOPS