Vector Databases & Hybrid Search
Build the retrieval layer every RAG system stands on: choose an embedding model and dimensionality deliberately, pick between HNSW IVF and flat indexes on evidence rather than defaults, and combine dense search with BM25 and a reranker instead of hoping one of them is enough. Learners index the same corpus into pgvector and a dedicated store, tune filtering and fusion weights, and measure recall at k against an exhaustive ground truth instead of eyeballing a handful of queries.
What this course covers.
6 modules, 42 named skill atoms. Expand any module to see them.
1Embeddings and Vector Space7 skill atoms
2Index Types and Trade-offs7 skill atoms
3Filtering and Data Modelling7 skill atoms
4Hybrid Dense plus Lexical7 skill atoms
5Reranking the Shortlist7 skill atoms
6Measuring Recall Honestly7 skill atoms
AI-215 in the role journeys.
This course appears in 3 of our 45 role journeys. Here is what a learner takes immediately before and after it in each.
Roles this course serves
This course is authored to band B4.
Every course we run is written to one rung of the CASI ladder, so a plan can be assembled to take a team from where they are to where they need to be.
What do B1–B6 mean?The CASI Capability Ladder — click to expand
Every course targets a band on the CASI Capability Ladder — our six-band proficiency scale, anchored to open standards (O*NET, ESCO, NICE, NIST AI RMF, Bloom's). A band tells you how deep a course goes, and what evidence proves it.
A note on B6. Courses in this catalog target B1–B5. B6 is not taught — it is recognised, through a portfolio and a panel, once someone is setting direction for others. Every journey here is built to land a learner at B5.
Other AI courses at this level.
Departmental AI Adoption & Automation Design
Transformers from First Principles
Fine-Tuning with Hugging Face
Distributed Training Foundations
Synthetic Data Generation & Evaluation
Document AI & Intelligent Document Processing
Run AI-215 for your team.
This course runs at several lengths depending on how deep you need to go and how much of it your people already have. Tell us who is being trained and we will scope it.