Jean-Vincent Mutombo

Optimized Digital Media & Marketing web applications using ReactJS, reducing page load time by 30% and enhancing user accessibility.

Implemented OpenTelemetry and Datadog for performance monitoring, resulting in a 25% improvement in key performance metrics.

Authored robust and reusable Jest unit-test foundations, boosting development experience (DX) and quality control efficiency by over 30%.

Integrated Kafka producers to stream asset metadata updates in real time, reducing sync delays by 80% and improving event-driven coordination.

Refactored core .NET services with async programming and dependency injection, cutting API response times by 40% and boosting scalability under peak load.

Implemented custom ServiceNow applications, leveraging Flow Designer, Service Catalog, SLAs, ACLs, and Mobile Agent to boost automation by 40%.

Configured Email Notifications with SMTP and POP3 protocols, improving user engagement and reducing response time by 30%.

Collaborated with departments and business stakeholders to translate requirements into functional ServiceNow solutions, enhancing workflow efficiency by 25%.

Developed UI Actions, Client Scripts, Business Rules, and Reports, including Scheduled Jobs and Email Integrations, improving system efficiency by 30%.

Led frontend development, collaborating closely with UI/UX designers to deliver responsive, user-centric interfaces and boosting satisfaction by 30%.

Engineered high-impact frontend features for the MVP, sustaining high-traffic during launch week, using a modular architecture with 100% test coverage.

Integrated LogRocket and NewRelic for monitoring user interactions, performance metrics, and application errors, increasing product efficiency by 40%.

Implemented Web Components for encapsulated UI modules, improving reusability and reducing regression issues by 20%.

Built a Kafka event pipeline to decouple frontend actions, cutting API latency by 45% and enabling seamless scaling during 3x post-launch traffic.

Boosted SEO for the Code of Africa website by 35%, improving search rankings and brand recognition.

Led cross-functional frontend teams, improving code quality by 40% through regular feedback and guiding successful project deliveries.

Mentored 5+ junior developers, fostering a collaborative and growth-oriented team atmosphere within the company.

Modernized an 8-year-old white-label system with PHP and ElasticSearch, advancing its capabilities and increasing system responsiveness and user loyalty by 20%.

Optimized .NET services using Mass Transit for message handling and tuning Entity Framework queries, reducing latency by 35% and improving throughput under high-load scenarios.

Integrated Thinkific courses and modules via API, improving user experience and simplifying enrollment and progress tracking by 35%.

Spearheaded the frontend for SavePlus, a for-profit crowdfunding app, delivering high-quality code and a seamless user experience, improving user retention by 25%.

Led code reviews and debugging efforts, ensuring stability and performance while driving 15% improvements through optimizations and feature suggestions.

Developed e2e tests with CypressJS, improving application reliability and quality across browsers and devices by 30%.

Integrated secure payment flows across Mobile Money, Paypal and Cards systems, processing thousands of transactions monthly with 99.9% success rate.

Implemented memoization and virtualization techniques in component rendering, improving scroll performance in large datasets by 70%.

Migrated a 15,000+ LOC legacy JavaScript codebase to TypeScript, reducing runtime bugs by 40% and enabling faster onboarding for new developers.

Built Node/ExpressJS and PostgreSQL backend for Tembea, refining cab requests and routes, boosting Andela Operations and Partner fellows productivity by 30%.

Integrated Slack API into Tembea's web app, enabling real-time updates and notifications and reducing response time by 20% for trip management and data collection.

Hardened authentication flows with proper auth-token management, reducing session-related vulnerabilities by 80%.

Optimized CouchBase data storage, improving database performance and reliability, easing data access, potentially increasing product adoption by 35%.

Pioneered and implemented a highly reusable PHPUnit testing architecture and backbone, accelerating the testing process and optimizing development cycles by 45%.

Built responsive Angular interfaces, elevating UI/UX by 30%, while driving cross-team innovation features.

Implemented CSP, input sanitization, and same-origin policies across frontend routes to eliminate by 80% of XSS and CSRF attack vectors.

Innovated data synchronization, ensuring smooth accessibility on low-speed connections and reducing load times by 40%, while enhancing the overall user experience.

Integrated a QR code-based payment mechanism, revolutionizing transaction speed for both delivery personnel and customers, cutting checkout time by 50%.

Led Agile development processes using PivotalTracker, ensuring efficient task allocation and progress tracking, resulting in a 20% increase in development velocity.

Built core business logic using advanced JavaScript features (async/await, closures, event delegation), resulting in a 25% performance boost across key user flows.