HENRY JOHNNIEUWENHUIZEN

• Own delivery of product functionality from requirements to production support
• Build monorepo backend and frontend systems with shared package architecture and clear domain boundaries
• Improve operational confidence through observability, automated quality gates, and structured API contracts
• Design asynchronous and realtime pipelines for user-facing workflows that require low-latency updates
• Design and ship OpenAI-powered chatbot and assistant workflows for real user and operator use cases

Backend: TypeScript, NestJS 11, Prisma, MongoDB, Mongoose, BullMQ, Redis, Socket.IO, WebSockets, Swagger

Frontend: Next.js 15, React 19, MUI, Tailwind CSS, React Hook Form, Zod

Cloud & Integrations: AWS S3 (AWS SDK v3), OpenAI SDK, Sentry, CloudWatch, Docker, Kubernetes, Helm, Cloudflare

AI Engineering: OpenAI SDK integrations, chatbot/assistant orchestration, prompt and response design, realtime interaction flows, and production integration into operational workflows

Quality: Playwright, Jest, Supertest, ESLint, Prettier, CI/CD release pipelines

• Own feature delivery end-to-end across a TypeScript monorepo workspace architecture
• Lead backend implementation in NestJS 11 with Prisma and MongoDB/Mongoose
• Design asynchronous processing with BullMQ + Redis and realtime workflows with Socket.IO/WebSockets
• Maintain API documentation and integration clarity through Swagger-first service contracts
• Deliver frontend applications with Next.js 15 + React 19 using MUI, Tailwind CSS, and React Hook Form + Zod
• Build OpenAI-powered chatbot and assistant capabilities integrated into product workflows
• Implement cloud integrations via AWS S3 and support production reliability with Sentry + CloudWatch logging
• Drive quality discipline using Playwright e2e, Jest/Supertest, and lint/format gates across shared packages

• Delivered product features across Svelte, Angular, and React frontend applications
• Built backend services in NestJS and Express.js on Node.js
• Implemented MongoDB-backed APIs and supported containerized deployments on Kubernetes

• Led end-to-end delivery across React/Redux/Next.js frontend and Node.js backend services
• Built and maintained cross-language integrations in Node.js, C++, and C
• Owned data and release workflows across MSSQL, MongoDB, Bamboo, and Octopus

• Senior Frontend Developer, Rapid Deploy (Jul 2019 - Apr 2020): Built React/Redux/MobX geospatial product interfaces with ArcGIS integrations.
• Senior Full Stack Developer / Team Lead, CodeForte (Nov 2016 - Jun 2019): Led frontend direction, delivered Node.js services, and owned CI/CD release execution.
• Senior Associate / Full Stack Developer, Exigent Group (Jul 2013 - Oct 2016): Delivered SharePoint, C#, and MS SQL enterprise workflow solutions.
• Consultant / Business Analyst, AG Computer Accounting (Jul 2010 - Jun 2013): Led implementations, BI reporting, and requirements translation for custom software delivery.
• Computer Teacher / Frontend Developer, Mountain Road Primary (Jan 2009 - Jun 2010): Built curriculum, taught computer literacy, and supported school technical operations.

Subjects: Mathematics, Physics, Chemistry, Computer Application Technology/Information Technology, Civil Technology