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sylvaincodes/README.md

SylvainCodes

Full-Stack JavaScript Developer | AI/ML Practitioner

Designing systems. Shipping features. Solving problems.

Patreon YouTube Twitter Stack Overflow



About Me

Building the future, one commit at a time

I’m a passionate Full-Stack JavaScript Developer who specializes in creating AI-driven systems, building scalable applications, and integrating intelligent models seamlessly into the JavaScript ecosystem.

  • Building intelligent SaaS ecosystems powered by agentic AI workflows (example project1, example project2, example project3)
  • Mastering on-device ML & optimized RAG pipelines for JavaScript
  • Exploring AI agents, real-time data streaming, and full-stack performance optimization
  • Fun fact: I architect complex neural networks, but still spend 10 minutes looking for a missing semicolon

Software Engineering Arsenal

Frontend

Angular Ionic Angular Next.js React React Native TypeScript Tailwind SASS ShadCN Figma

Backend

Node.js Next.js API NestJS Express.js Fastify PostgreSQL MongoDB Prisma Mongoose GraphQL REST API Microservices

Cloud & DevOps

AWS Vercel Netlify Docker GitHub Actions Sentry Terraform Kubernetes Ansible Prometheus


AI/ML Engineering Arsenal

Deep Learning & ML Frameworks

TensorFlow TensorFlow Lite TensorFlow.js PyTorch PyTorch Mobile Keras scikit-learn XGBoost LightGBM CatBoost

Data Science & Experimentation

Jupyter MLflow Weights & Biases Pandas NumPy SciPy

LLMs & NLP

Hugging Face OpenAI Gemini LangChain LlamaIndex spaCy NLTK Haystack Transformers PEFT

LLM Fine-Tuning & Optimization

LoRA QLoRA DeepSpeed Accelerate BitsAndBytes

RAG & Vector Search

FAISS Pinecone Weaviate Milvus ChromaDB OpenSearch

ML Evaluation & Observability

Evidently Great Expectations Deepchecks

MLOps & Model Lifecycle

DVC Kubeflow BentoML

Model Serving & Inference

FastAPI ONNX ONNX Runtime vLLM NVIDIA Triton TensorRT

Computer Vision & Multimodal AI

OpenCV YOLO Ultralytics CLIP Segment Anything

ML Data & Pipelines

Apache Spark Airflow DVC

AI Prototyping & Web UI

Streamlit Gradio Dash Panel


Latest projects

Digital Marketplace Platform: [COMING SOON] (January 2027)

Build, sell, discover, and securely trade digital goods at scale!

[Your Platform Name] is a large-scale digital marketplace designed to let anyone sell and purchase digital products such as game keys, gift cards, game codes, DLCs, software licenses, and other digital goods. The platform is designed with scalability, security, automation, and AI-powered intelligence in mind, targeting more than 1 million active users per day.

Key features:

  • πŸ›’ Digital Marketplace: Sellers can list and sell digital goods including games, gift cards, keys, codes, DLCs, and software licenses.
  • πŸ‘₯ Multi-Seller Platform: Anyone can become a seller, manage products, track sales, and build their own digital storefront.
  • ⚑ Instant Digital Delivery: Automatically deliver digital products immediately after successful payment.
  • πŸ” Secure Transactions: Built with secure payments, seller verification, transaction monitoring, and protected digital delivery.
  • πŸ”Ž AI-Powered Search: Semantic search helps users discover relevant products beyond traditional keyword matching.
  • πŸ€– Personalized Recommendations: Machine learning can analyze user behavior, purchases, searches, and interactions to deliver personalized product recommendations.
  • πŸ›‘οΈ AI Fraud Detection: ML-based risk scoring helps identify suspicious transactions, abnormal purchasing behavior, account abuse, and potential fraud.
  • 🏷️ Intelligent Product Classification: AI can automatically categorize products, extract attributes, improve listings, and assist sellers with product creation.
  • πŸ“Š Seller Intelligence: AI-powered analytics can provide sellers with sales insights, demand predictions, pricing recommendations, and product performance analysis.
  • πŸ“ˆ Demand Forecasting: Machine learning can analyze historical sales and marketplace activity to forecast product demand and identify emerging trends.
  • 🧠 Intelligent Marketplace Ranking: Ranking models can combine relevance, product quality, seller reputation, pricing, availability, and user preferences to improve product discovery.
  • πŸ’¬ AI Customer Support: LLM-powered assistants can help users with product questions, orders, refunds, and marketplace support using contextual platform data.
  • 🌍 High-Scale Architecture: Designed for horizontal scaling and high availability using microservices, Kubernetes, and cloud infrastructure.

Scalability & Production ML

The platform separates core marketplace services from ML workloads, allowing recommendation, search, fraud detection, and LLM inference services to scale independently.

Kubernetes provides horizontal scaling for application and ML services, while Kafka decouples high-volume user activity from downstream analytics and ML pipelines.

The architecture is designed to support 1M+ daily active users while providing a foundation for real-time AI-powered search, personalized recommendations, fraud detection, intelligent product classification, demand forecasting, seller intelligence, and AI-assisted customer support.

AI/ML Stack & Architecture

  • πŸ”Ž Intelligent Search & Discovery: OpenSearch powers scalable product search, filtering, and discovery, while vector embeddings enable semantic search for natural-language queries and similar-product discovery. FAISS, Pinecone, Weaviate, Milvus, and ChromaDB support vector-search experimentation and evaluation. Ranking models can combine search relevance, product quality, pricing, seller reputation, availability, and user behavior to deliver more relevant marketplace results.

  • 🀝 Recommendation Engine: PyTorch, TensorFlow, scikit-learn, XGBoost, and LightGBM are used to build recommendation and ranking models based on user views, searches, purchases, wishlists, clicks, and product interactions. Embeddings and behavioral features enable personalized recommendations such as "Recommended for You", "Similar Products", "Customers Also Bought", and trending products.

  • πŸ›‘οΈ Fraud Detection & Risk Scoring: XGBoost, LightGBM, scikit-learn, and anomaly-detection techniques analyze transaction, account, device, payment, seller, and behavioral signals to calculate risk scores. The system can identify suspicious purchases, account abuse, payment fraud, refund abuse, and unusual marketplace activity in real time.

  • 🏷️ AI Product Intelligence: Hugging Face, Transformers, OpenAI, Gemini, and classification models analyze seller-provided product information to automatically categorize products, extract attributes, generate descriptions, improve search metadata, detect duplicates, and identify potentially misleading listings. This reduces manual work for sellers while improving product discoverability.

  • πŸ€– Generative AI & LLMs: Hugging Face and Transformers provide access to modern language models for product understanding, classification, summarization, and fine-tuning. OpenAI and Gemini power marketplace assistants, seller tools, product enrichment, customer support, and natural-language experiences. LangChain and LlamaIndex orchestrate LLM workflows, tool calling, RAG pipelines, and contextual AI interactions.

  • πŸ’¬ AI Marketplace Assistant: LLM-powered agents combine OpenAI/Gemini, LangChain, LlamaIndex, vector search, and RAG to provide contextual assistance to buyers and sellers. The assistant can answer product questions, explain orders, assist with seller analytics, retrieve marketplace information, and interact with platform services through controlled tools and APIs.

  • πŸ“ˆ Demand Forecasting & Pricing Intelligence: Historical sales, product popularity, marketplace activity, pricing, seasonality, and competition are processed using Pandas, NumPy, SciPy, XGBoost, and LightGBM to forecast demand and generate pricing and product-performance recommendations for sellers.

  • 🧠 Personalized Marketplace: Recommendation and ranking models combine user preferences, product relevance, seller reputation, pricing, availability, and behavioral signals to personalize homepages, search results, product pages, recommendations, and discovery experiences for individual users.

  • πŸ“Š ML Experimentation & Feature Engineering: Jupyter, Pandas, NumPy, and SciPy are used for data exploration, feature engineering, statistical analysis, experimentation, and model development. MLflow and Weights & Biases track experiments, datasets, parameters, metrics, model versions, and evaluation results to make the ML lifecycle reproducible.

  • πŸš€ ML Serving & Inference: FastAPI exposes Python-based ML models as independent inference services consumed by the NestJS backend. ONNX and ONNX Runtime optimize trained models for efficient inference, while vLLM provides high-throughput LLM serving. NVIDIA Triton and TensorRT support optimized GPU inference for latency-sensitive and high-volume ML workloads.

  • πŸ”„ MLOps & Model Lifecycle: DVC manages datasets and model artifacts, while Kubeflow orchestrates training and ML pipelines. BentoML packages models into deployable production services. MLflow and Weights & Biases manage experiment and model tracking, while monitoring systems evaluate prediction quality, inference latency, data drift, model drift, and production performance.

  • πŸ‘οΈ Computer Vision: OpenCV handles image processing and computer vision workflows, while YOLO provides real-time object detection for marketplace product imagery. TensorFlow Lite and CoreML support lightweight and optimized model inference for mobile and edge environments.

  • πŸ“¨ Real-Time ML Data Pipeline: Apache Kafka captures high-volume marketplace events including searches, product views, clicks, purchases, payments, and user interactions. These events feed recommendation systems, fraud detection, personalization, analytics, and ML feature pipelines. Apache Spark processes large-scale historical datasets for analytics and model training, while Airflow orchestrates scheduled data-processing and ML workflows.

  • πŸ” Continuous ML Feedback Loop: User and marketplace events flow through Kafka into data-processing and feature-engineering pipelines. Training datasets are generated from real marketplace behavior, models are trained and evaluated, experiments are tracked with MLflow/W&B, and validated models are deployed through ML inference services. Production predictions and user interactions are continuously collected to improve future model versions.

Platform Stack

  • 🎨 Frontend: Next.js, React, TypeScript, and Tailwind CSS provide the customer-facing marketplace, seller dashboards, product discovery interfaces, checkout flows, and AI-powered experiences.

  • βš™οΈ Backend: NestJS and Node.js provide the core application and API layer using REST APIs and microservices. They handle users, sellers, products, orders, payments, inventory, digital delivery, marketplace logic, and communication with ML inference services.

  • πŸ—„οΈ Data: PostgreSQL stores transactional and relational marketplace data such as users, products, orders, sellers, and payments. MongoDB handles flexible document-oriented data where appropriate, while Redis provides high-speed caching, sessions, rate limiting, queues, and frequently accessed marketplace data.

  • ☁️ Cloud: AWS provides the cloud foundation for scalable compute, storage, databases, networking, application services, and ML infrastructure.

  • 🐳 Infrastructure: Docker packages application and ML services into portable containers. Kubernetes orchestrates these services across the cluster, providing horizontal scaling, service discovery, load balancing, self-healing, and high availability. Terraform manages infrastructure as code, while Ansible automates server and environment configuration.

  • πŸ”„ CI/CD: GitHub Actions automates testing, building, security checks, containerization, and deployment workflows, enabling changes to move from development to production consistently.

  • πŸ“‘ Monitoring: Prometheus collects infrastructure and application metrics for monitoring service health, resource usage, latency, and ML workloads. Sentry tracks application errors and exceptions across the platform to identify and resolve production issues.

  • πŸ“¨ Data & Events: Apache Kafka provides the event-streaming backbone for high-volume marketplace events such as searches, product views, purchases, clicks, payments, and user interactions. These events feed real-time analytics, recommendation systems, fraud detection, and ML feature pipelines. Apache Spark processes large-scale datasets and historical marketplace data for analytics and model training, while Airflow orchestrates scheduled data and ML workflows.


Community Platform: OpenSchools.app (August 2026)

Build and monetize your own community, without the complexity!

OpenSchools.app is a community platform inspired by platforms like Skool, designed to let anyone create and run their own online community for free. Community owners can build a space around their audience, share content, engage members, and monetize their communities through paid memberships.

Key features:

  • 🌐 Create Communities: Anyone can launch their own community and customize it around their niche, audience, or business.
  • πŸ’° Free & Paid Communities: Creators can choose to offer their communities for free or charge members for access.
  • πŸ’³ Creator Monetization: Community owners can earn revenue from paid memberships while OpenSchools.app charges only platform fees.
  • πŸ‘₯ Community Management: Manage members, content, discussions, and access from a centralized dashboard.
  • πŸ“š Content & Learning: Give communities a place to share educational resources, posts, and valuable content. Creator-First Platform: Built to make launching and growing an online community accessible without requiring technical expertise. Explore OpenSchools.app

SASS Multi-Tenant AI Knowledge Assistant (January 2026)

Make your company knowledge instantly accessible with AI!

The Multi-Tenant AI Knowledge Assistant is an intelligent platform that turns your company’s documentation into a searchable, AI-powered knowledge base. Employees can ask questions and get precise answers backed by your internal documents, onboarding guides, and department-specific content.

Key features powered by AI:

  • πŸ“š RAG-Powered Search: Retrieves the most relevant document chunks using vector embeddings and Qdrant.

  • πŸ€– Generative AI Answers: Uses Gemini / LangChain to generate context-aware answers directly from your knowledge base.

  • πŸ” Role & Department Filters: Ensures employees only see what they are allowed to, protecting sensitive company data.

  • πŸ› οΈ Multi-Role Support: HR, Admin, Employee, and Platform Admin roles with tailored access and insights.

  • πŸ’Ύ Document Management: Upload, categorize, and manage internal documents with metadata for quick retrieval.

  • πŸ“Š Analytics & Usage Tracking: Monitor queries, document usage, and AI response performance.

Explore the AI Knowledge Assistant



SASS AI Goal Tracker (September 2025)

Achieve your goals faster with AI motivation!

GoalTracker is an intelligent goal-tracking app that helps users set, monitor, and achieve their personal goals. It adds accountability by letting users stake money on achieving goals, so there’s real motivation to follow through.

Key features powered by AI:

  • πŸ€– Computer Vision Insights: Analyze profile images, videos, or progress photos to track improvements and engagement.

  • πŸ“Š AI Progress Analytics: Automatically assess goal completion trends and provide actionable feedback.

  • πŸ’Έ Goal Staking System: Commit money to your goalsβ€”earn rewards when you succeed, lose it when you slip.

  • πŸ”” Smart Reminders: Personalized nudges and encouragement to keep you on track.

Try GoalAI Now



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