Staff Flutter & Next.js Engineer

• *This role is for one of our clients**

Seniority level: Mid\-Senior level

Min Experience: 6 years

Location: Bengaluru

JobType: full\-time

As a Staff Engineer, you will be responsible for bridging the architecture between our Next.js web platform and Flutter mobile application.

Design a comprehensive design system (utilizing tools such as Flutter\-Web or Figma\-to\-Code pipelines) that guarantees visual and functional uniformity across Web, iOS, and Android platforms.

Lead the development strategy for sharing business logic (including Authentication, State Management, and API layers) across platforms—utilizing TypeScript for the web, Dart for Flutter, or investigating Kotlin Multiplatform (KMP) for core logic sharing.

Handle the intricacies of WebViews and JS Bridges in hybrid environments, ensuring smooth data transfer and maintaining authentication persistence between native and web components.

Enhance Flutter rendering to achieve 60 FPS performance by diagnosing and resolving "jank" with DevTools, optimizing complex widget trees, and efficiently managing heavy list views.

Strictly monitor and optimize App Store and Play Store binary sizes, as well as Web JS bundle sizes, to maximize conversions in regions with diverse network conditions.

Implement and oversee over\-the\-air (OTA) update systems (such as Shorebird for Flutter or custom CodePush\-like solutions) to enable critical hotfixes without delays from app stores.

Develop and maintain pipelines involving Fastlane for mobile deployments and optimized Vercel/Docker builds for web, ensuring a consistent release rhythm for 200,000 daily active users (DAU).

Establish cross\-platform monitoring using tools such as Sentry, New Relic, or Firebase Crashlytics to achieve and maintain a 99\.9% crash\-free session rate across all devices.

• *Technical Requirements**

• Extensive Flutter expertise: 4\+ years of experience with deep knowledge of Provider, Riverpod, or BLoC patterns, and proficiency in Dart FFI.

• Advanced web development skills: Expert\-level proficiency in React 19\+, Next.js, and TypeScript.

• "Hybrid" bridge experience: Demonstrated success in delivering high\-traffic applications employing Native Channels or platform\-specific implementations.

• Scalability experience: Managed frontend ecosystems supporting products with 100,000\+ daily active users.

• Hardware optimization knowledge: Skilled in optimizing for low\-end Android devices and older browsers without sacrificing the experience for high\-end users.

### **Must\-have skills**

Flutter, Next.js

### **Good\-to\-have skills**

React 19\+

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.