Damien Jansen

Developed a Digital Marketing System using React, Node.js and Supabase, reducing operational costs by 80%. Integrated OpenAI, Anthropic API and Perplexity API for automating story research and generation, cutting campaign prep time by 70%. Built a real-time campaign dashboard and re-architected automation logic using serverless functions. Leveraged AWS for hosting with 99.9% uptime, implemented GraphQL for API query efficiency, and automated CI/CD processes to speed up release cycles by 30%. Applied Test-Driven Development and published a React Native mobile app with an AI-powered legal assistant chatbot, increasing user engagement by 35%. Led development of a high-performance API layer and real-time video/call application with 99.95% uptime, designed and deployed containerized microservices reducing infrastructure costs by 25%. Managed data migration with 100% integrity and mentored junior developers.

Developed a Digital Marketing System using React, Node.js and Supabase, cutting operational costs by 80%. Automated story research and generation by integrating OpenAI, Anthropic and Perplexity APIs, reducing campaign prep time by 70%. Built a real-time campaign dashboard and enhanced email segmentation accuracy with serverless functions. Leveraged AWS cloud services ensuring 99.9% uptime and implemented GraphQL to reduce query response times by 60%. Automated CI/CD pipelines improving release cycles by 30%. Applied Test-Driven Development and used Storybook, reducing bugs by 50%. Developed React Native mobile app with AI-powered legal assistant chatbot, improving user engagement by 35%. Delivered a fault-tolerant API and real-time video/call app managing 10k+ concurrent calls with 99.95% uptime. Led migration of legacy data with full integrity and cost reduction. Mentored junior developers.

Built a HIPAA-compliant patient management system with React and FastAPI, improving registration efficiency by 40%. Optimized caching with Redis, enhanced real-time data exchange, led UI/UX redesign for web and mobile apps resulting in 30% user engagement increase. Improved database performance reducing report generation time by 30 seconds. Automated CI/CD pipelines with Azure DevOps, developed scalable microservices architectures using Node.js, FastAPI, and Docker. Integrated third-party APIs and payment gateways, drove architectural improvements with Kafka and RabbitMQ for event-driven systems. Implemented AI-driven solutions using OpenAI's GPT models to automate and enhance customer support.