Open to opportunities

Vishwas User

@vishwasuser

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Senior Mobile Engineer specializing in high-performance React Native and iOS applications.

India

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What I'm looking for

I seek a senior mobile engineering role creating scalable, secure React Native/iOS products where I can improve performance, reduce costs, and mentor teams.

I am a Senior Mobile Engineer with 8+ years building high-performance React Native and iOS (Swift, Objective-C) apps for global clients. I focus on Clean Architecture, CI/CD, and measurable product improvements.

At Baker & Taylor I designed a custom audio SDK that replaced a third-party provider, delivering an estimated $500K in annual cost savings and improving cross-platform audio performance.

Previously I led mobile efforts at Disprz and Moglix, implementing scalable SaaS features, offline-first capabilities, enterprise security measures, and performance optimizations that increased retention, reduced crashes, and boosted product adoption.

I collaborate effectively with distributed teams, prioritize accessibility and security (WCAG, SSL pinning, jailbreak detection), and drive long-term maintainability through modular architecture and automated CI/CD pipelines.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Developer

Current

Baker & Taylor

Mar 2024 - Present (2 years 3 months)

Spearheaded mobile development for the Boundless app, designed a custom JavaScript audio SDK replacing a third-party provider and delivering an estimated $500K annual cost savings while optimizing cross-platform audio performance and WCAG accessibility.

React Native JavaScript iOS Android Performance Optimization Accessibility

Software Engineer

Disprz

Sep 2021 - Mar 2024 (2 years 6 months)

Architected scalable SaaS mobile features for the LXP, increasing client satisfaction by 25% and retention by 15%, drove 20% growth in product adoption through technical consultations, and implemented Clean Architecture and React Native performance optimizations.

React Native Redux Firebase AWS Performance Optimization Consultation

Mobile App Developer

Moglix

Dec 2019 - Sep 2021 (1 year 9 months)

Created a scalable B2B SaaS mobile app with robust offline mode, reducing churn by 40%, implemented enterprise security (SSL pinning, jailbreak detection) cutting vulnerabilities by 90%, and optimized API integrations to improve response times by 15%.

React Native Security (SSL Pinning)API Integration Performance Optimization Redux

iOS Developer

Kadam Technologies

Jul 2016 - Dec 2019 (3 years 5 months)

Developed and launched multiple end-to-end iOS applications, improved development cycle efficiency by 30% through clear API and UI/UX specifications, and delivered high-performance, well-rated App Store releases.

Swift Objective C UIKit Core Data XCode REST APIs App Store Deployment