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keyur thumar

Android Platform & SDK Engineer | Java, Kotlin, Jetpack Compose, Scalable Architecture, Unit Testing,SDK & app Security Expert | 14+ Years | Built CheqUpi | Ex-Wibmo, Infoblox, Mercedes-Benz | Open to Global Remote Roles

Greater Bengaluru Area

11+ years of work experience

CheqUPI (YC S23)
Mar 20224 yrs 7 mosPresent

Bengaluru, Karnataka, India

• Led Android and iOS development for CheqUPI, scaling to 1M+ users with high transaction reliability • Architected modular system using Clean Architecture + Jetpack Compose, improving development velocity by ~30% • Reduced app crashes by ~25–40% through performance optimization, monitoring, and memory leak fixes • Improved app startup time by ~20–30% via lazy loading and optimization strategies • Designed & built scalable payment SDKs (UPI, custom SDKs) with clean APIs, modular architecture, and backward compatibility, handling 10K+ daily transactions • Reduced APK size by ~15–25% through resource optimization and ProGuard tuning • Improved video buffering performance by ~20% using ExoPlayer tuning and ABR optimization • Built and customized ExoPlayer modules supporting DRM (Widevine) and adaptive bitrate streaming • Implemented CI/CD pipelines reducing release cycle time by ~40% • Wrote and maintained unit tests ensuring code reliability and reducing regression issues • Collaborated cross-functionally with backend, product, and QA teams to deliver production-grade features
Infoblox
Nov 20201 yr 5 mosMar 2022

Bengaluru, Karnataka, India

• Designed and developed VPN SDK using Android VPNService, enabling secure DNS over VPN for enterprise environments. • Built a scalable mobile cloud service that efficiently handles encrypted DNS traffic with high reliability and low latency. • Achieved over 1 million secure DNS requests processed through an optimized VPN tunnel and networking stack. • Implemented unit testing strategies for networking and security modules to ensure stability and regression safety. • Improved security and reliability of DNS queries via encryption, protocol optimization, and connection management
Wibmo
Jun 20182 yrs 6 mosNov 2020

Bengaluru, Karnataka, India

• Led the 3DS 2.0 and Authentication Payment Gateway SDK team, driving secure, high-performance SDK development for large-scale financial applications. • Served as the technical product owner, translating business and customer needs into clear technical direction while working closely with agile development teams. • Collaborated with product, engineering, and global sales support teams to understand market demands and customer pain points, ensuring feature development aligned with business goals. • Designed and implemented robust SDK and application security frameworks, including encryption, secure data handling, and compliance with industry standards (PCI-DSS, EMVCo). • Oversaw comprehensive unit testing, automated testing, and quality assurance strategies to ensure reliability and security across all releases. • Led cross-functional teams and actively contributed to product design, architecture decisions, and roadmap planning. • Played a key role in the PayZapp and Auth App product design and development, enhancing user authentication flows, improving security layers, and delivering a seamless payment experience.
HARMAN International
Aug 20161 yr 11 mosJun 2018

Bengaluru, India

• Performed in-depth analysis of mobile application development platforms and the Android SDK to define the best technical solutions for product development. • Gathered requirements and managed the full SDLC using agile methodology, working closely with cross-functional teams including product, design, and engineering. • Led and collaborated with teams for effective product development and product management, ensuring alignment between business goals and technical execution. • Developed Android applications using industry-standard design patterns such as MVC, Observer, and Singleton to maintain clean and scalable architecture. • Implemented advanced mapping and navigation features such as route guidance, geolocation tracking, and real-time map interactions. • Integrated head-unit SDKs to enable seamless map and navigation experiences within automotive infotainment systems. • Built and optimized hyper-local EV charging station discovery modules, enabling users to locate nearby chargers, view availability, and navigate directly to them. • Conducted memory profiling, performance analysis, and view hierarchy optimization to deliver high-performance, efficient mobile applications.
Mar 20151 yr 5 mosJul 2016

Greater Bengaluru Area

• Led a team to build a scalable mobile application for a built-in memory charging cable that enables users to back-up and restore phone data while the device is charging. • Developed the app using industry-standard design patterns to ensure maintainability and high performance. • Built custom, pixel-perfect UI/UX optimized for all screen sizes and fully aligned with the design specifications. • Ensured the application supported the latest Android APIs and adhered to modern Android development guidelines. • Developed backend communication modules to enable seamless data transfer between the cable hardware and the mobile device. • Maintained and optimized the system post-launch to ensure reliability, stability, and long-term performance.

keyur’s AI Stack

claude
claude
codex
codex
github copilot
github copilot
mcp
mcp
claudecode
claudecode
githubcopilot
githubcopilot

Education

Bachelor's degree, Computer Engineering

GTU

20093 yrs2012

science

Alpha high school

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Headline

Android Platform & SDK Engineer | Java, Kotlin, Jetpack Compose, Scalable Architecture, Unit Testing,SDK & app Security Expert | 14+ Years | Built CheqUpi | Ex-Wibmo, Infoblox, Mercedes-Benz | Open to Global Remote Roles

About

Lead Android Engineer with 14+ years of experience building high-scale fintech, OTT, and security platforms used by millions of users. I specialize in SDK and platform engineering, focusing on building reusable systems, scalable architectures, and high-performance mobile applications using Kotlin and Jetpack Compose. My work includes designing payment and VPN SDKs, optimizing app performance (reducing crashes by up to 40%), improving startup time, and building secure, production-grade systems. I have led engineering teams, owned end-to-end architecture, and delivered systems powering high-volume transactions and real-time applications across global environments. Core strengths: • SDK & Platform Engineering • Mobile Architecture & System Design • Performance Optimization & Reliability • Security & Networking (VPN, Encryption) • Fintech & Media Systems Always interested in building scalable systems and solving complex engineering problems.

Location

Greater Bengaluru Area

AI stack

claude

codex

github copilot

mcp

claudecode

githubcopilot

Work experience

Lead mobile engineer - Android at CheqUPI (YC S23), Mar 2022 - Present · 4 yrs 7 mos, Bengaluru, Karnataka, India, • Led Android and iOS development for CheqUPI, scaling to 1M+ users with high transaction reliability • Architected modular system using Clean Architecture + Jetpack Compose, improving development velocity by ~30% • Reduced app crashes by ~25–40% through performance optimization, monitoring, and memory leak fixes • Improved app startup time by ~20–30% via lazy loading and optimization strategies • Designed & built scalable payment SDKs (UPI, custom SDKs) with clean APIs, modular architecture, and backward compatibility, handling 10K+ daily transactions • Reduced APK size by ~15–25% through resource optimization and ProGuard tuning • Improved video buffering performance by ~20% using ExoPlayer tuning and ABR optimization • Built and customized ExoPlayer modules supporting DRM (Widevine) and adaptive bitrate streaming • Implemented CI/CD pipelines reducing release cycle time by ~40% • Wrote and maintained unit tests ensuring code reliability and reducing regression issues • Collaborated cross-functionally with backend, product, and QA teams to deliver production-grade features

Staff Software Developer | Infoblox Inc. | Bangalore at Infoblox, Nov 2020 - Mar 2022 · 1 yr 5 mos, Bengaluru, Karnataka, India, • Designed and developed VPN SDK using Android VPNService, enabling secure DNS over VPN for enterprise environments. • Built a scalable mobile cloud service that efficiently handles encrypted DNS traffic with high reliability and low latency. • Achieved over 1 million secure DNS requests processed through an optimized VPN tunnel and networking stack. • Implemented unit testing strategies for networking and security modules to ensure stability and regression safety. • Improved security and reliability of DNS queries via encryption, protocol optimization, and connection management

Lead Product Engineer - Android at Wibmo, Jun 2018 - Nov 2020 · 2 yrs 6 mos, Bengaluru, Karnataka, India, • Led the 3DS 2.0 and Authentication Payment Gateway SDK team, driving secure, high-performance SDK development for large-scale financial applications. • Served as the technical product owner, translating business and customer needs into clear technical direction while working closely with agile development teams. • Collaborated with product, engineering, and global sales support teams to understand market demands and customer pain points, ensuring feature development aligned with business goals. • Designed and implemented robust SDK and application security frameworks, including encryption, secure data handling, and compliance with industry standards (PCI-DSS, EMVCo). • Oversaw comprehensive unit testing, automated testing, and quality assurance strategies to ensure reliability and security across all releases. • Led cross-functional teams and actively contributed to product design, architecture decisions, and roadmap planning. • Played a key role in the PayZapp and Auth App product design and development, enhancing user authentication flows, improving security layers, and delivering a seamless payment experience.

Senior Engineer at HARMAN International, Aug 2016 - Jun 2018 · 1 yr 11 mos, Bengaluru, India, • Performed in-depth analysis of mobile application development platforms and the Android SDK to define the best technical solutions for product development. • Gathered requirements and managed the full SDLC using agile methodology, working closely with cross-functional teams including product, design, and engineering. • Led and collaborated with teams for effective product development and product management, ensuring alignment between business goals and technical execution. • Developed Android applications using industry-standard design patterns such as MVC, Observer, and Singleton to maintain clean and scalable architecture. • Implemented advanced mapping and navigation features such as route guidance, geolocation tracking, and real-time map interactions. • Integrated head-unit SDKs to enable seamless map and navigation experiences within automotive infotainment systems. • Built and optimized hyper-local EV charging station discovery modules, enabling users to locate nearby chargers, view availability, and navigate directly to them. • Conducted memory profiling, performance analysis, and view hierarchy optimization to deliver high-performance, efficient mobile applications.

android developer at MEEM STUDIO PRIVATE LIMITED, Mar 2015 - Jul 2016 · 1 yr 5 mos, Greater Bengaluru Area, • Led a team to build a scalable mobile application for a built-in memory charging cable that enables users to back-up and restore phone data while the device is charging. • Developed the app using industry-standard design patterns to ensure maintainability and high performance. • Built custom, pixel-perfect UI/UX optimized for all screen sizes and fully aligned with the design specifications. • Ensured the application supported the latest Android APIs and adhered to modern Android development guidelines. • Developed backend communication modules to enable seamless data transfer between the cable hardware and the mobile device. • Maintained and optimized the system post-launch to ensure reliability, stability, and long-term performance.

Education

Bachelor's degree, Computer Engineering, GTU

science, Alpha high school