David Osuchukwu

Performed manual and automated testing of web applications and software features to verify functional requirements, user workflows, and expected system behavior.

Created and maintained automated end-to-end test coverage using Playwright, including UI interactions, assertions, navigation, forms, and regression scenarios.

Used Postman to test and validate REST APIs, including request/response behavior, status codes, authentication, validation, error handling, and integration flows.

Investigated defects using browser developer tools, API responses, logs, and reproducible test cases, communicating findings clearly to engineering team.

Supported regression, smoke, functional, and integration testing across application releases.

Collaborated with developers to reproduce issues, verify fixes, and improve overall software quality before release.

Developed the backend of a B2B e-commerce startup, enabling users the ability to conveniently sign up and create fully digital stores in minutes.

Led a complete redesign of the company's development processes, from Software Requirements Analysis to AI-assisted delivery, deployment and maintenance leading to significant increase in monthly sign-ups and daily active users.

Created, documented, tested and maintained a robust multi-platform API library comprising over 140+ endpoints for managing users, products, inventory, payments, and post-order processing.

Validated API behavior and integration flows during development and maintenance, creating extensive test suites helping identify issues before deployment.

Mentored junior software engineers on cloud-native delivery and responsible use of AI agents to improve engineering productivity.

Built a financial transaction platform for Rubies Digital Bank, seamlessly processing millions of Naira in transactions monthly.

Developed multiple web applications using .NET, Kotlin, Reactjs, and Vue.js, while integrating with commercial banking APIs.

Developed, tested, and maintained highly available and scalable Integrations for Rubies Digital Bank and other commercial banks in Nigeria including Greenwich Merchant Bank using Spring Framework.

Refactored outdated codebases, improving performance and scalability for large-scale banking clients.

Managed company-wide networking infrastructure, ensuring system reliability and data integrity.

Implemented end-user security and networking principles, obtaining a certification from Cybrary IT.

Performed hardware/software quality assurance and compliance checks to verify that assembled computer systems met company standards before acceptance.