Derek David
@derekmiracledavidSenior Full-Stack & AI Systems Engineer
About
Senior Full-Stack & AI Systems Engineer with 5+ years of experience architecting high-concurrency web, mobile, fintech, and voice AI platforms. Specialized in the TypeScript, React, Next.js, React Native, and Node.js ecosystem, with deep production expertise in atomic financial ledgers, real-time WebSocket audio streaming, LLM function calling, and distributed BullMQ/Redis workflows.
Reviews
Employment
- Full-Stack & AI Systems EngineerPraix Development LTD2025 — Present
Architected PraixAI (AgentLabs Core), a multi-tenant Voice AI & Bulk Calling SaaS integrating ElevenLabs and OpenAI Realtime APIs with Twilio, Plivo, and SIP trunks. Engineered a ReactFlow conversation builder and state-machine compiler, and spearheaded the Dora Fintech ecosystem
- Full-Stack DeveloperConnectivo AB2025
Architected web applications using React and Vue.js that boosted user engagement by 30%. Streamlined frontend-backend data flow for 28% faster performance and improved UI/UX redesigns increasing retention by 22%.
- Full-Stack DeveloperSky Enterprise2022 — 2025
Engineered scalable MERN-stack web applications, reducing manual business workload by 35%. Built RESTful APIs improving data integrity by 25%, implemented hybrid SQL/NoSQL architecture, and deployed microservices with Docker at 99.9% uptime.
- Node.js DeveloperManaknight Inc.2021 — 2022
Developed backend systems for mobile applications using Node.js and PostgreSQL, acquiring 15,000+ users. Built a golf game management application increasing engagement by 45% and designed normalized database schemas improving retrieval speeds by 35%.