Devanshu Soni

Senior Software Engineer with 4+ years of experience building cross-platform mobile applications using Flutter and Dart, alongside backend development with Next.js. Proven ability to architect and ship consumer-facing products from concept to production, across wellness platforms, social apps, and event-driven experiences. Focused on delivering high-performance, polished interfaces and scalable backend solutions that improve user retention and drive measurable business outcomes.

Application Developer at MMF Infotech Pvt. Ltd. (2023-03 – Present)

• Architected and shipped Affirmate, a cross-platform meditation app built with Flutter and Firebase, driving measurable growth in daily active users through a dynamic content feed and gamified progress tracking.
• Built the Sound Bath audio engine using FFmpeg, enabling real-time audio mixing, multi-track layering, and custom time-based effects. This became the app's highest-rated feature and a key driver of user retention.
• Designed and implemented a scalable media delivery pipeline using AWS S3, reducing average asset load times and eliminating a critical performance bottleneck affecting thousands of daily sessions.
• Developed and maintained backend API routes using Next.js, handling server-side logic, data fetching, and third-party service integrations for web-facing product features.
• Delivered the Meo Festival event app with full Google Maps integration for venue navigation and schedule management, improving event attendance and on-site user experience.
• Maintained consistent cross-platform UI across iOS and Android, reducing post-release bug reports through thorough widget-level testing and platform-specific optimization.

Application Developer at Osiyatech Pvt. Ltd. (2021-07 – 2023-03)

• Developed core features for Mentorbooth, a professional mentoring platform with audio and video calling, push notifications, and real-time session management, improving mentor-mentee engagement and session completion rates.
• Contributed across a diverse technology stack including Flutter, React, Ionic, Android, and JavaScript, working on multiple client projects simultaneously while consistently meeting delivery deadlines.
• Led performance tuning efforts across the Mentorbooth app, achieving faster screen load times and a smoother user experience through code profiling, lazy loading, and state management refactoring.
• Collaborated with product and design teams in Agile sprints, translating wireframes into pixel-accurate, production-ready implementations with minimal revision cycles.