Catalog · Nexora

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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Machine Learning

Machine Learning intermediate

Recommender Systems from Scratch

Build a recommender end to end: implicit-feedback matrix factorisation, content-based retrieval with embeddings, two-stage retrieve-then-rank architectures, and the cold-start problem every real system faces. Evaluated with offline ranking metrics and an honest discussion of why they disagree with A/B tests.

HT Hiroshi Tanaka 4.9

$89.00

15 hours

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Career Skills

Career Skills advanced

System Design Interviews for Senior Engineers

Senior system design interviews test judgement under ambiguity, not memorised diagrams. Requirement clarification, capacity estimation, explicit trade-offs, failure modes, and narrating your reasoning so the interviewer can follow it.

NH Nadia Hussain 4.8

$89.00

12 hours

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Data Engineering

Data Engineering intermediate

Data Engineering with dbt and Modern SQL

Treat analytics code like software. Layered model architecture, incremental materialisations, snapshots for slowly changing dimensions, data tests as contracts, and documentation that stays current because it is generated. Includes CI that blocks a merge when a data test fails.

NH Nadia Hussain 4.8

$79.00

14 hours

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Machine Learning

Machine Learning intermediate

Feature Engineering That Actually Moves Metrics

Most model gains come from features, not architecture. Target encoding without leakage, temporal features that respect causality, aggregation windows, interaction discovery and feature stores. Includes a rigorous ablation methodology so you can prove which features earned their place.

SD Sofia Duarte 4.7

$69.00

11 hours

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Agentic AI

Agentic AI advanced

Multi-Agent Systems: Coordination Patterns

When one agent is not enough: supervisor architectures, hierarchical delegation, shared scratchpads and message-passing protocols. You will implement a research team that plans, splits work, critiques its own output and reconciles conflicting findings, then measure whether the added complexity beat a single well-prompted agent.

PR Priya Raghavan 4.7

$129.00

16 hours

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Cloud

Cloud advanced

Event-Driven Architecture on the Cloud

Decoupling with events buys flexibility and bills you in complexity. Event schema design and versioning, idempotent consumers, the saga pattern for distributed workflows, dead-letter handling, and debugging a flow with no single call stack.

KM Kwame Mensah 4.6

$99.00

13 hours

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Cloud

Cloud intermediate

Cloud Cost Engineering and FinOps

Cloud spend is an architecture problem wearing a finance costume. Cost attribution and tagging discipline, rightsizing with real utilisation data, commitment strategy, egress traps, and the design choices that quietly triple a monthly bill.

SD Sofia Duarte 4.6

$79.00

9 hours

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Data Engineering

Data Engineering advanced

Lakehouse Architecture with Apache Iceberg

Table formats brought database guarantees to object storage. Snapshot isolation, hidden partitioning, schema evolution without rewrites, compaction strategy, and time-travel queries that make debugging a bad load tractable.

KM Kwame Mensah 4.5

$105.00

14 hours

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Cloud

Cloud beginner

Cloud Architecture Fundamentals

The primitives every cloud gives you and how to compose them: compute options, object storage, managed databases, queues, VPC networking and identity. Includes cost modelling and the failure modes of each pattern, so your design survives both an outage and a finance review.

EV Elena Vasquez 4.5

$59.00

13 hours

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