
Ejembi Thomas
@ejembithomas
I build secure, high-performance React Native banking and payment apps with native mobile integrations.
What I'm looking for
I've led mobile engineering for Sparkle Nigeria, building transaction-critical banking systems, secure payment encryption, custom SmileID KYC native modules, and a 99.99% crash-free production experience. I also open-sourced blynk-deferlink, a deferred deep-linking alternative to Firebase Dynamic Links.
Across Blinkcore, Opendesk Tech, Tratrust Limited, and Wish To Wear, I've delivered payment, transport, travel, and retail apps using React Native, Kotlin, Swift, TypeScript, and Expo. I improve transaction reliability, mobile performance, architecture, CI/CD security, and engineering standards while mentoring developers.
Experience
Work history, roles, and key accomplishments
Deputy Lead / Senior Mobile Engineer
Sparkle Nigeria
Mar 2025 - Present (1 year 6 months)
Maintained a 99.99% crash-free session rate across a growing production user base by implementing robust error boundaries and native exception handling. Engineered custom native modules in Swift and Kotlin to wrap SmileID KYC SDKs, reducing identity verification latency.
Lead Mobile Engineer
Wish To Wear
Jul 2025 - Feb 2026 (7 months)
Served as the final technical authority on mobile architecture and cross-platform integrations, managing end-to-end delivery of the international retail application. Built complex native bridge extensions in Swift and Kotlin and architected real-time error tracking via Sentry and Firebase Remote Config.
Senior Mobile Developer
Blinkcore
Dec 2022 - Mar 2025 (2 years 3 months)
Designed and developed two critical digital payment platforms (BlinkPay and Blink Merchant), implementing payment rails including tap-to-pay, geo-payment, and scan-to-pay. Reduced transaction processing time by 40% using Socket.io and increased transaction success rate from 60% to 90%.
Mobile Developer
Opendesk Tech
Nov 2022 - Jul 2024 (1 year 8 months)
Developed the user application using React Native and React Native Elements, implementing Redux for state management and Socket.IO for real-time interactions. Reduced application load time by 30% through targeted performance optimization techniques.
Mobile Developer
Tratrust Limited
Sep 2021 - Feb 2023 (1 year 5 months)
Developed high-rated iOS and Android applications (Rencoin and Globaledge) using React Native, Supabase, and Firebase. Increased code reliability by 95% through comprehensive unit and integration testing.
Education
Degrees, certifications, and relevant coursework
Unicaf University
Bachelor of Science, Computer Science
Pursuing a Bachelor of Science in Computer Science, currently ongoing.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Salary expectations
Job categories
Skills
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