Catalog · Nexora

Agentic AI intermediate

RAG Systems in Production

The gap between a RAG demo and a RAG product is chunking strategy, retrieval evaluation and latency budgets. Covers document parsing, chunk boundary design, hybrid retrieval, cross-encoder re-ranking, and caching layers that keep p95 sane.

DO Daniel Okafor 4.9

$89.00

13 hours

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Deep Learning

Deep Learning advanced

Transformers and Attention, Implemented Line by Line

Build a transformer from scratch: scaled dot-product attention, multi-head projections, positional encodings, KV caching and the modern variants (RoPE, grouped-query attention, RMSNorm) that make inference cheap. You will train a small model, profile it, and understand precisely where the FLOPs go.

HT Hiroshi Tanaka 4.9

$109.00

17 hours

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DevOps

DevOps beginner

Docker and Containers: A Working Mental Model

What a container really is (namespaces, cgroups, layered filesystems), then the practice: small reproducible images, multi-stage builds, layer caching that speeds up CI, container networking and volumes, and multi-service local environments with Compose.

KM Kwame Mensah 4.7

$49.00

9 hours

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JavaScript

JavaScript intermediate

Modern React Patterns and Server Components

React changed shape and a lot of received wisdom expired with it. Server versus client components, the boundaries between them, data fetching and caching, state colocation, and the rendering model that explains why your component ran three times.

AB Aisha Bello 4.6

$79.00

13 hours

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DevOps

DevOps beginner

CI/CD with GitHub Actions

Pipelines that fail fast and tell you why. Workflow and job structure, matrix builds, effective caching, reusable workflows, OIDC for keyless cloud auth, environment protection rules, and deployment gates. Includes a supply-chain hardening pass.

MA Marta Alves 4.5

$45.00

7 hours

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Web Development

Web Development intermediate

Frontend Performance: Core Web Vitals in Practice

Diagnose and fix what users actually feel: layout shift, input delay, and the largest paint. Critical-path CSS, code splitting, image strategy, font loading, caching headers, and measuring with real-user monitoring rather than a lab score on your own laptop.

AB Aisha Bello 4.5

$59.00

9 hours

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