Software Engineer (Contract) at Doval Digital Services (UK)

Architected a high-reliability scheduling/materialization system using Hangfire to handle complex recurrence patterns, decoupling scheduling from delivery to ensure auditability and consistent execution of time-sensitive property reminders. Integrated Firebase Cloud Messaging with support for platform-specific actionable payloads; configured Android channels and iOS categories to enable mark-as-done interactions directly from push notifications. Implemented entitlement-based authorization using custom EntitlementRequirement handlers and leveraged .NET authorization policies to dynamically control access to features based on subscription plans. Optimized high-latency operations by using Task Parallel Library (TPL) and Task.WhenAll for concurrent processing of multiple images/documents, reducing API response times. Engineered DST-aware time zone-stable scheduling logic using IANA IDs and UTC conversions to prevent notification drift during daylight saving transitions by decoupling local

Mobile Engineer (Contract) at Fraud Watch 360 (UK)

Implemented a production-ready AI support chat in Flutter using GetX controllers, streaming UI state management, and Dio-based file uploads to allow end users to send text or evidence images and receive real-time assistance; deployed to both Play Store and App Store. Built a modular learning/quiz feature with models, repositories/services, GetX controllers, and responsive UI: fetching question banks, handling offline fallbacks, tracking scores, and enabling session restart without leaving the screen. Redesigned the main dashboard into a responsive grid of scan/report/learn actions with unified navigation and modal flows so critical fraud-reporting tools are one tap away on phones and tablets. Overhauled authentication by rebuilding the HTTP service/repository layer: secure token storage, refresh-token rotation, OTP/reset flows, and session cleanup guardrails to prevent silent logouts. Enhanced long-form education/community views with zoomable media, lazy-loaded comments, share/like/boo

Mobile Engineer (Contract) at Doval Digital Services (UK)

Built and maintained a production Flutter app across 12 feature domains (chat, payments, subscriptions, reminders, move-out, maps, multi-role onboarding) using clean separation of data/domain/presentation layers and deployed to both Play Store and App Store. Implemented dual payment flows on a single codebase: Stripe web checkout with polling-based activation for Android, and Apple in-app purchase with StoreKit integration, receipt verification, and server-side webhook linkage via app account token for iOS with zero cross-contamination between flows. Designed real-time Firebase architecture with custom security rules including null-access crash guards, participant-based read/write controls, and race-condition analysis between Firebase Auth sign-in timing and stream subscription start. Managed complex async state across a three-role user system (landlord, tenant, tradesperson) with Riverpod/AsyncNotifier/StreamProvider patterns, including auto-dispose, cache-first strategies, and fire-a

C#/.NET Developer (Contract) at Kaaafriku Smartech Ltd (Nigeria)

Built production-grade ASP.NET Core 10 REST APIs with clean layered architecture. Applied interface-based DI, consistent wrappers, and global exception-handling middleware across all endpoints. Implemented JWT bearer authentication with BCrypt password hashing and OTP verification via SMS and email (Termii integration), enforced rate limiting and request-level activity logging. Integrated Paystack payment gateway including webhook signature verification and payment lifecycle handling; managed environment-specific keys (staging vs production) via strongly-typed settings classes and .env files. Used Hangfire with PostgreSQL storage for non-blocking OTP dispatch and scheduled hourly statistics aggregation; designed jobs for fault tolerance and observability through Hangfire dashboard with configurable auth. Implemented FluentValidation pipelines with conditional rules based on diaspora vs local members; enforced unique email/phone constraints at DB level using partial indexes, catching vi

Flutter Engineer (Contract) at Zitlac Media (US)

Directed full-cycle development of a web-based B2B SaaS application delivering consistent high performance. Reduced state-related bugs by ~40% by executing a core refactor/migration from provider to Riverpod. Contributed to data modeling and system design by implementing serverless solutions and integrating services using Firebase (Firestore, Cloud Functions). Integrated Stripe for subscription management and secure in-app transactions ensuring seamless payment flows. Developed complex high-fidelity, responsive UI components using custom paint and implicit animations matching the provided design specifications.

Flutter Engineer (Contract) at Sya rapa

Audited and optimized a high-traffic fintech application, improving rendering performance of savings and investment dashboards. Integrated Firebase for targeted push notifications and established performance monitoring benchmarks (Crashlytics), boosting customer retention. Refactored a legacy codebase to use modern, scalable state management solutions, significantly reducing technical debt and improving build times.

Mobile Engineer (Full-time) at Kaaafriku Smart Tech Ltd (Nigeria)

Led full-stack development for a dual-sided ride-hailing platform enforcing Clean Architecture to guarantee codebase scalability and long-term maintainability and deployed to both Play Store and App Store. Developed robust state synchronization using Riverpod and Bloc to manage real-time trip status, driver location, and socket connections, eliminating UI lag. Integrated National Identity Number (NIN) verification and biometric services using native platform channels for secure and optimized hardware interaction. Implemented an event-driven dispatch engine via FCM achieving significant battery and data throughput optimization during background location tracking.

Flutter Engineer at Swift Technologies

Developed a complete bill payment and transfer app using Flutter with pixel-perfect accuracy against UI/UX designs. Integrated complex REST APIs for mission-critical banking transactions with secure data pipelines and robust error handling. Used Provider and Riverpod to manage cross-screen data dependencies and user session state across the application.

Software Engineer Intern (SIWES) at Wema Bank

Developed and optimized high-volume transactional APIs using C#/.NET focusing on payload optimization for efficient mobile client consumption. Implemented an automated notification system for transaction failures with a reusable error-handling logic pattern and user feedback loop.