Josué Mbuyu

Built and scaled AI-powered SaaS platforms enabling companies to create, deploy, and monitor voice agents, used by 4,000+ users generating up to 5,000 calls/day. - Built and shipped Rounded Studio, a SaaS platform to create, deploy, and monitor AI voice agents in production - Contributed to a product used by 4,000+ users generating 1,000–5,000 calls/day - Developed a no-code agent builder using React Flow for building conversational workflows - Designed and implemented LLM-based post-call analysis pipelines to extract insights from call transcripts - Built and optimized REST APIs (FastAPI) with authentication, permissions, and performance improvements - Developed a real-time analytics dashboard with customizable KPIs and data visualization (Cube.js) - Contributed to Donna, an AI-powered medical assistant used by 1,000+ users in healthcare settings - Integrated AI workflows (OpenAI) to automate analysis and insights generation

Led end-to-end development of AI SaaS platforms, delivering production systems in high-velocity environments. - Built and launched 2 AI-powered SaaS platforms from scratch in ~2 weeks each, focusing on rapid product delivery and real-world usability - Designed and implemented asynchronous pipelines (BullMQ, Redis, workers) to orchestrate complex workflows including data ingestion, AI processing, and automated publishing - Engineered multi-LLM systems (OpenAI, Gemini, Claude) to power content generation, review analysis, and decision workflows across products - Developed a Google Business automation platform managing 600+ entities, including continuous synchronization of accounts, locations, and reviews via external APIs - Built AI-driven review analysis and response generation pipelines, including sentiment classification, prioritization of critical cases, and automated or human-in-the-loop responses - Implemented robust data synchronization systems (OAuth2 flows, token refresh, scheduled jobs) to ensure consistency and reliability at scale - Designed content generation pipelines combining scraping, external data enrichment, and LLMs to produce posts and marketing content automatically - Built end-to-end reporting systems generating branded PDF reports and automated email delivery on a scheduled basis - Implemented fault-tolerant architectures with retry strategies, fallback mechanisms (multi-model), and error handling for production-grade reliability - Developed AI audit and scoring systems (GEO platform) to evaluate brand visibility across LLM responses, including multi-model querying, scoring aggregation, and insight generation

Worked on building and scaling an AI-powered SaaS platform focused on automated content generation and high-performance user experiences. - Developed and maintained a fullstack SaaS application using Next.js and TypeScript, delivering dynamic and high-performance user interfaces - Designed and implemented end-to-end typed APIs (tRPC) ensuring strong type safety between frontend and backend - Built AI-powered content generation features leveraging LLMs (Claude, LangChain) to automate high-value content workflows - Implemented advanced state management and data fetching strategies (Zustand, React Query) to optimize performance and user experience - Designed backend architecture and managed data layer using PostgreSQL, Prisma, and Redis caching for scalability and efficiency - Integrated authentication and session management (Clerk) with secure user flows and access control - Implemented subscription and billing systems (Stripe) including plan management, webhooks, and lifecycle handling - Deployed and maintained production systems on Vercel, ensuring reliability and continuous delivery

Worked on the development of a large-scale B2B platform for multisector supply in Central Africa, focusing on performance, scalability, and user experience. - Integrated Figma designs into Drupal templates with a focus on responsive and scalable UI architecture - Improved overall platform performance by 20%, optimizing loading times and frontend efficiency - Implemented a mobile-first approach, contributing to a 20% increase in mobile traffic - Collaborated with cross-functional teams (product, design) to improve UX and delivery workflows - Contributed to project delivery efficiency using Agile practices and Jira task management

Worked on secure biometric and identity management systems, focusing on performance, reliability, and real-world operational impact. - Developed biometric systems (fingerprint, face liveness) handling ~500 identifications per day - Reduced biometric card production time from 4–6 months to 10 days, improving operational efficiency - Built a secure consular management system enabling ID card production in under 24 hours - Created 50+ reusable components, reducing development time by 30% - Implemented offline capabilities (Service Workers) to ensure system reliability in low-connectivity environments - Set up testing strategies (Jest, Cypress) to improve code quality and system stability

Contributed to the modernization of government digital platforms, improving performance, accessibility, and scalability of public services. - Migrated a large-scale application from React to Next.js, improving performance by 30% and SEO by 20% - Built a digital evaluation system used by 100+ public institutions, significantly improving reporting workflows - Improved accessibility and performance of public-facing platforms - Participated in technical discussions, code reviews, and team coordination - Contributed to improving development practices through collaboration and knowledge sharing

Congolia is a startup factory based in the tech industry, known for launching mini-startups and providing third-party software development services to foster new business growth. - Engineered a performance-oriented food delivery app, exceeding targets by 110% - Developed and integrated essential features and services, including Google Maps, address search, and real-time order tracking on the dashboard - Migrated a multi-page user experience into a single-page app, improving customer engagement by 10% - Designed and developed RESTful APIs using Node.js and Express.js to handle client-server communication, ensuring efficient data transfer and scalability - Implemented authentication and authorization mechanisms using JWT (JSON Web Tokens) to secure sensitive endpoints and protect user data.