A service that validates Jumia Food orders placed through Jumia affiliates for fraud orders, invalid orders, and orders with incorrect order details.

- Coordinated with the Team Lead to design the architecture for Jumia Food Order Validation Tool which validates Affiliate orders placed on Jumia Food.

- Designed the data warehouse schema and developed data pipelines for the Jumia Order Validation Tool to verify orders placed on the Jumia e-commerce website for fraud, overpayments, commissions using Java.

A service that validates Jumia Travel orders placed through Jumia affiliates for fraud orders, invalid orders, and orders with incorrect order details.

- Coordinated with the Team Lead to design the architecture for Jumia Travel Order Validation Tool which validates Affiliate orders placed on Jumia Travel.

- Designed the data warehouse schema and developed data pipelines for the Jumia Travel Order Validation Tool to verify orders placed on the Jumia e-commerce website for fraud, overpayments, commissions using Python.

- Built API wrappers to Integrate with third-party APIs which provide order aggregations.

A web application that provides a portal that automates payments, generate invoices, aggregate payment data and provide visualization for payment information.

- Responsible for designing and building a Payment Portal web application to manage the payment processing of Jumia Affiliates such as commission aggregation, fraud detection, invoice generation, name inquiry, etc.

- Developed Payment Portal APIs to enable other internal services to integrate with the platform.

- Developed a payment processing engine to aggregate commissions, generate payment invoices and automate commission payment for all Jumia affiliates.

- Wrote unit tests to keep functionalities in check after code improvements have been made to code. 

A web application that provides Jumia Affiliates with all the information they need at their fingertips.

- Responsible for optimizing API services used by the Jumia Affiliate program, adding new features to, and rebuilding the Jumia Affiliates Platform for managing several Affiliate operations using services such as Performance Monitoring service, Advertising Services (Link Building and Banner Generation), and Reporting Services (Payment reports, Conversion reports, Commission reports).

- Developed a reporting engine to consume external Affiliate activities management API (CAKE) and provide reports on URL clicks, URL conversion rates, commission rates and payment details.

- Created charts and tables to integrate with the reporting engine API and render API
data in the Affiliate Portal UI using JavaScript ArmCharts.

A blockchain-powered platform that enables cross-currency transactions across West Africa.

- Participated in requirements gathering, requirements analysis, and system design with product owners and stakeholders.

- Developed a Cordapp Client API engine for the payment system which enables external services to interact with the payment flows via RPC.

- Coordinated with Team Lead to build a CI/CD pipeline to build, sign and deploy Corda application jars using Gradle on Azure DevOps and Azure Portal.

- Responsible for designing and writing smart contracts to verify payment flows using Kotlin and Corda Flow Framework.

An API-driven service that interfaces between the ethereum blockchain and a cryptocurrency application.

- Coordinated with CTO on gathering the system requirements and system design for an Ethereum Bridge.

- Responsible for researching the design and implementation of Hierarchical Deterministic Wallets and Multi-Account Hierarchy for Deterministic wallets based on Bitcoin Improvement Proposals (BIP 32 & BIP 44).

- Responsible for designing models for HD Wallets and building an API engine for the Ethereum Bridge.

- Developed Bridge APIs to enable integrations with other internal applications, handle user transactions and Ethereum blockchain integration.

An API-driven service that enables customers to purchase NGNT stable coins and interfaces between the blockchain and the cryptocurrency application.

- Coordinated with CTO on gathering the system requirements and system design for the NGNT Bridge.

- Developed Smart Contracts to manage the user transaction flow for buying and selling NGNT stable coins.

- Responsible for designing models for Wallets and building an API engine for the NGNT Bridge.

- Developed NGNT Bridge APIs to enable integrations with other internal applications, handle user transactions and Ethereum blockchain integration.