Israel Fasina
Senior Mobile & Frontend Engineer
github.com/Fasinaisrael
PROFESSIONAL SUMMARY
Senior Mobile & Frontend Engineer focused on building secure, production-grade applications in fintech and regulated
environments. Specializing in React Native, Next.js, and platform-native tooling, with strong ownership across
development, testing, and release pipelines. Experienced in delivering mobile and web applications used in production,
handling App Store and Play Store releases, and working on security-sensitive flows including authentication, payments,
and data integrity.
TECHNICAL SKILLS
Languages & Frameworks: TypeScript, JavaScript, Swift, Kotlin, React Native, React, Next.js, Expo
State & Data: Redux Toolkit, Context API, REST APIs, WebSockets, Expo SecureStore
Build & Deploy: Xcode, TestFlight, Gradle, APK/AAB, Fastlane, CodePush, OTA updates, EAS
Security: VAPT, SSL pinning, OTP flows, BVN verification, biometric auth, session management
Tools: Git, Agile/Scrum, Reactotron, Tailwind CSS, Material UI, Push Notifications
EXPERIENCE
Senior Mobile Engineer | Abbey Mortgage Bank
Mar 2025 - Present
- Revamped and maintained a legacy Bare React Native application for iOS and Android, addressing critical build and
deployment challenges.
- Engineered secure mobile banking features including tier-based account displays, bill payments, and beneficiary
verification.
- Enhanced onboarding flows with third-party integrations and advanced liveness checks for KYC compliance.
- Led security hardening through VAPT testing: OTP vulnerabilities, authorization flaws, SSL pinning, tampering protection.
- Managed end-to-end release pipelines for Android (assembleRelease) and iOS (TestFlight).
Mobile Engineer (Sole Developer) | FastCash
2024 - 2025
- Designed and implemented a fintech mobile app end-to-end using React Native & Expo (onboarding, auth, payout setup).
- Built modular dashboard with investment products, wallet management, and activity tracking.
- Implemented secure bank-grade workflows for OTP verification and session management.
- Architected state management and persistent secure storage using Expo SecureStore.
- Handled release management using Expo prebuilds and OTA updates across iOS and Android.
Frontend Developer | Sterling Tech
2022 - Jul 2024
- Contributed to multiple outsourced client projects, delivering responsive, production-ready web applications.
- Led development of a registration and management system for the National Civil Aviation Authority (NCAA).
- Built reusable UI components using React, Redux, and Tailwind CSS.
- Collaborated with stakeholders to translate business workflows into technical solutions.
Mid-level Mobile Developer | Urban Eats
Nov 2023 - Jan 2025 (Remote)
- Contributed to a cross-platform food delivery platform connecting customers, vendors, and dispatch riders.
- Implemented biometric/Face ID authentication, cart, checkout, and payment gateway integrations.
- Developed vendor and rider modules with real-time order tracking via WebSockets and push notifications.
- Resolved Android/iOS build issues including Gradle and Xcode signing failures.
CORE SKILLS
State Management & Architecture
Centralized state using Redux Toolkit, typed selectors, modular reducers, and debug tooling for predictable app state.
Secure API Handling
Centralized API wrapper, token-based authentication, automatic session management, and robust error handling.
Device & Environment Security
Checks for compromised devices, initializes device info globally, handles platform differences, and enforces security-first
policies.
Global App Configuration
Singleton pattern for global variables, graceful handling of optional values, and consistent configuration for APIs and analytics.
Code Maintainability & Best Practices
Modular folder structure, reusable utilities, typed interfaces, defensive coding, and clear separation of concerns.
UX, Performance & Stability
Safe area handling, gesture support, status bar control, smooth app initialization, and OTA updates for scalable deployment.
Security-First Development
VAPT mindset, secure storage, session validation, password & input validation, and defensive API access control.
Scalable & Maintainable Project Structure
Clear folder separation, reusable constants, async initialization, and consistent responsive design for long-term maintainability.
Observability & Debugging
Centralized logging, debug flags for APIs, Reactotron integration, and structured error handling for production stability.
EDUCATION
Federal University of Agriculture, Abeokuta (FUNAAB) - Nigeria
B.Sc Seed Technology
Semicolon - Tech Institute
Diploma in Software Development
ADDITIONAL
Languages: English
Hackathons: Active hackathon participant
References: Available upon request
