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RUYANGA Merci

@ruyangamerci

Backend engineer building production web platforms, including U-Caravan’s B2B/B2C marketplace and real-time booking systems.

Rwanda

Message

I built U-Caravan, a B2B/B2C marketplace with real-time inventory tracking, dynamic pricing, and an SEO-optimized product architecture. Its stack includes Node.js, PostgreSQL, and React.

I’ve also developed real-time booking and workflow systems, including MbuPro’s property booking platform and INUMA, a University of Rwanda request-flow system. My work focuses on backend architecture, APIs, database design, and secure access control.

Experience

Work history, roles, and key accomplishments

Backend Development Intern

Binary Hub

Jan 2024 - Aug 2025 (1 year 7 months)

Developed backend features using Node.js and NestJS for internal and client-facing platforms. Implemented request validation layers, structured error handling, and standardized API responses, and debugged production issues.

NodeJS NestJS API Development Debugging Logging Monitoring

Full-Stack Intern

SEVEN X

Mar 2025 - May 2025 (2 months)

Built high-performance web applications using Hono and Next.js, focused on backend service layers. Designed scalable PostgreSQL database schemas and developed secured API endpoints with input validation and structured error handling.

Hono Next.js PostgreSQL API Development Input Validation Error Handling

Junior Backend Developer

VIPI Transport

Sep 2022 - Dec 2023 (1 year 3 months)

Designed and maintained RESTful APIs supporting daily transport operations. Modeled and optimized PostgreSQL and MongoDB databases, implemented JWT-based authentication and role-based authorization, and improved API throughput through query optimization and caching.

REST APIs PostgreSQL MongoDB JWT RBAC Query Optimization Caching

Education

Degrees, certifications, and relevant coursework

freeCodeCamp

JavaScript Algorithms and Data Structures, Computer Science

Completed the JavaScript Algorithms and Data Structures certification.

Proxify

Pro JavaScript Backend Developer, Backend Development

Completed the Pro JavaScript Backend Developer certification.

University of Rwanda

Bachelor of Science, Computer Science

Pursuing a Bachelor of Science in Computer Science with coursework in data structures, algorithms, database systems, software engineering, and web development.