Brian Mutui

Full stack software engineer with a BSc in Computer Science and production experience across fintech, e-commerce, and government web platforms. Currently building LLM-powered applications at CreativeBits AI, including retrieval-augmented generation (RAG) pipelines and prompt evaluation workflows. Strong backend experience with Java and Spring Boot alongside REST API design, PostgreSQL and Supabase, and payment integration (M-PESA); frontend experience with React, Next.js, and TypeScript.

Working knowledge of Python from formal training and mentoring. Used to working on live systems where changes are code-reviewed and shipped through CI/CD.

Generative AI Specialist at CreativeBits AI (2026-04 – Present)

• Build backend services in Java that integrate large language models into production systems.
• Design and implement RAG and data pipelines using embeddings and vector databases.
• Design, test, and refine prompts; evaluate model outputs for accuracy, consistency, and quality.
• Integrate and fine-tune models to support product features and internal workflows.

Software Engineer at Kocela (Fintech), Kenya (2025-10 – 2026-01)

• Built the Sage Android app in Kotlin (Jetpack Compose, MVVM, Clean Architecture) with secure local storage, payment processing, and financial transaction workflows.
• Developed a full stack admin portal (Java, Play Framework) with REST APIs, user authentication, and role-based access control, and managed its production deployment.
• Built the Epitome Elegance e-commerce platform (Next.js frontend, Spring Boot backend): product catalog, cart, checkout, payment integration, and order management.
• Developed an investment platform with REST APIs, a database schema for investment products and user accounts, and an analytics dashboard.
• Improved database performance and APIs on a content platform with a cross-functional team; improved CI/CD pipelines to shorten deployment cycles.

IT Consultant (Industrial Attachment) at State Department for the ASALs and Regional Development, Kenya (2024-05 – 2024-09)

• Developed and maintained user-facing features for web-based government systems using React and TypeScript.
• Integrated third-party APIs with cross-functional teams to support reliable data exchange between systems.
• Implemented responsive design patterns, improving usability across desktop and mobile devices.
• Used Git for version control and took part in code reviews to maintain code quality.

Bachelor of Science in Computer Science – Cooperative University of Kenya, Nairobi (2025-12)

Software Engineering Program in Software Engineering – ALX Software Engineering Program (2022-01 – 2022-12)