Senior Full-Stack/Mobile Dev (16+ yrs) | AI-Powered Apps, ChatGPT, CMS
Hi 👋! I’m Heng Ung, a full-stack developer and AI engineer with 16+ years of hands-on experience building scalable web and mobile solutions that drive real business impact. CORE COMPETENCIES Backend & Frontend – Python/Django • Laravel/PHP • Node.js/Express • React/Next.js CMS Development – Traditional: WordPress (Gutenberg, ACF, custom plugins), Shopify (Liquid, Plus Apps), Salesforce Commerce Cloud – Headless: Contentful, Strapi, Sanity, Prismic API-Driven Architectures – REST & GraphQL • Webhooks • Microservices Mobile Apps – Flutter • Native iOS & Android • Swift • Kotlin AI & Machine Learning – Natural Language Processing, Computer Vision, Predictive Analytics – Retrieval-Augmented Generation (RAG), Prompt Engineering – LLM Fine-tuning & Deployment (GPT-4, Llama, Claude) – Multi-Agent Orchestration (LangChain, AutoGen, CrewAI) – Speech Tech: Text-to-Speech (AWS Polly, Google TTS, Azure), Speech-to-Text (Google, AWS, Azure) – Agent Communication Protocols: MCP, A2A & ACP – AI Image Generation: Text-to-Image & Image-to-Image (Stable Diffusion, DALL·E, Midjourney) Generative Adversarial Networks (GANs) & Diffusion Models Fine-tuning & Custom Model Training ControlNet & Conditioning Pipelines Prompt Engineering for Visual Outputs Automation & Workflow Orchestration – n8n, Zapier, Make (Integromat), custom Node.js workers – Event-driven triggers, multi-step pipelines, error handling & monitoring DevOps & Cloud – Docker, Kubernetes, AWS, Azure, GCP SELECTED PROJECT HIGHLIGHTS E-commerce Platforms – Built multi-tenant stores with dynamic pricing, real-time sales tracking, inventory management and custom reporting dashboards. Healthcare Mobile Solutions – Developed telemedicine apps with symptom checkers, CDSS, appointment scheduling, patient education and wearable integration. Financial Analytics Suite – Automated ratio analysis tool, anomaly detection module, NLP-driven earnings forecasting and sentiment analysis dashboard. AI-Powered Marketing Automation – Recommendation engines, visual search, lead scoring, email-send-time optimization, churn prediction and intelligent chatbots. WHY PARTNER WITH ME? Proven 16-year track record delivering end-to-end projects on time and on budget Rapid prototyping, maintainable code and clear documentation Strong communication: regular updates and transparent timelines ROI-focus: every feature aligned to your business goals Let’s connect—whether you have a detailed spec or just an idea, I’ll help turn it into a success story. Feel free to invite me to your job post or send a message!"