Joscelyn Cueille

– Designed and developed the full-stack application (React Native, Next.js, Node.js, PostgreSQL) – Architected scalable APIs with authentication, payments, and real-time synchronization – Integrated AI-based personalized itinerary recommendation system – Implemented monorepo architecture (Turborepo) and CI/CD pipelines – Led and reviewed work of 3 freelance developers – Improved mobile performance (40% reduction in loading time) – Deployed containerized infrastructure (Docker, Kubernetes)

– Designed and developed a sentiment analysis engine (LLMs + NLP models) processing 50k+ reviews/month – Built AI pipelines (Python, FastAPI) including scoring, thematic clustering, and actionable insight extraction – Developed secure REST APIs and analytics dashboards (Next.js, TypeScript) – Implemented modular, scalable architecture (PostgreSQL, Docker, GitLab CI/CD) – Reduced inference costs and improved processing time by 35% – Worked closely with Customer Success to implement product feedback loops

– Developed front-end and back-end for an AI assistant (React, TypeScript, FastAPI) – Integrated LLMs with orchestration, context management, and data security constraints – Implemented Retrieval-Augmented Generation (RAG) systems connected to document databases – Improved code quality (TypeScript migration, linting, unit testing) – Built robust CI/CD pipelines and performance monitoring – Collaborated with data, security, and domain experts

– Freelancing – Built an IRC server from scratch in C (memory management, sockets, concurrency) – Developed a real-time multiplayer game (NestJS, React, WebSockets)