Training Hybrid Search - Mastering BM25 and Vectors for RAG

$4,620

  • 4 days
  • Onsite
  • 10 people max.
Ref: SLX463
10 people max.
$4,620
In-company rate: from $7,865 for the whole team
On-site and certification exam on quote
4 days
Onsite

Don't let this gap widen

Why this program matters

  • Without hybrid search, enterprise engines lose 40% relevance on complex queries, driving 25% higher user abandonment according to Gartner.

  • Development costs explode as 60% of time goes to manual tuning, while 70% of RAG projects fail from lack of BM25-vector fusion.

  • In 2024, untrained teams watch their AI ROI fall 35%, risking obsolescence against agile competitors.

  • Every quarter without hybrid skills widens a fatal competitive gap and triples customer losses.

Allan BUSI, Learni trainer · AI expert
Allan BUSI

Learni trainer · AI expert

73%productivity gap
×3cost of inaction
Flag of the United StatesBuilt for US teams
Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone

Trusted by — schools, companies and industrial groups

25,807 programs · 25 countries

  • Aptar
  • ArcelorMittal
  • Equans
  • EDF
  • Ubisoft
  • Microsoft

Every program built with a dedicated engineer

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Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft and Microsoft.

Hybrid Search training objectives

  • Master BM25 algorithms for professional lexical search
  • Develop high-performance vector indexes with advanced embeddings
  • Implement hybrid search fusion for maximum relevance
  • Design scalable hybrid RAG pipelines for enterprise use
  • Optimize hybrid search performance on massive datasets
  • Deploy production-ready certified hybrid search solutions
  • Acquire hybrid search expertise for critical AI projects

Hybrid Search curriculum: 4 modules over 4 days

Module 1 : Hybrid Search: BM25 Fundamentals and Data Preparation (Elasticsearch, TF-IDF)

Dive into BM25 mechanisms to precisely score lexical queries, set up a hybrid Elasticsearch environment, prepare real enterprise datasets by cleaning and indexing millions of documents, perform practical exercises on BM25 parameter optimization, analyze real-world e-commerce search engine cases, and create your first functional BM25 index with recall and precision metrics.

Module 2 : Hybrid Search: Vector Search and Embeddings (Sentence Transformers, FAISS)

Generate dense embeddings using models like Sentence Transformers on prepared data, implement ANN vector indexes via FAISS or Pinecone for fast semantic searches, test cosine similarity on ambiguous queries, integrate vector augmentation techniques to enhance relevance, apply to an enterprise RAG use case with Q&A on internal documents, and validate performance through comparative benchmarks.

Module 3 : Hybrid Search: BM25-Vector Fusion and Reranking (Reciprocal Rank Fusion, Cohere Rerank)

Fuse BM25 and vector scores using RRF or hybrid models for superior relevance, set up reranking pipelines with Cohere or cross-encoders, experiment on datasets like MS MARCO to refine fusion weights, develop a complete hybrid search prototype connected to an API, simulate high-traffic enterprise scenarios, generate NDCG and MRR evaluation reports, and iterate improvements based on real feedback.

Module 4 : Hybrid Search: Optimization, Deployment, and Monitoring (Kubernetes, Prometheus)

Scale your hybrid search system with Docker and Kubernetes for cloud-native deployments, integrate monitoring via Prometheus and Grafana for latency and throughput, optimize costs with sparse-dense hybrid indexing, test robustness against adversarial attacks, deploy an end-to-end professional RAG project on AWS or GCP, master advanced troubleshooting, and conclude with skills certification and deliverable portfolio.

How Hybrid Search skills are assessed

  • Advanced MCQ on hybrid search algorithms and metrics
  • Assessment via end-to-end hybrid RAG project
  • Technical presentation to AI search experts

How the Hybrid Search course is taught

  • Live sessions led by production AI expert trainers
  • Hands-on labs on real enterprise datasets
  • End-to-end hybrid search project from A to Z
  • Comprehensive resources: code, notebooks, certification documents

Hybrid Search training: access and practical arrangements

The Training Hybrid Search - Mastering BM25 and Vectors for RAG program is delivered onsite or remote (blended-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.

The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.

Equipment required

For the smooth delivery of the Training Hybrid Search - Mastering BM25 and Vectors for RAG program, the following equipment is required:

  • Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
  • Training environments installed on workstations or accessible online
  • Course materials, hands-on exercises and complementary resources
  • Post-training access to materials and educational resources

For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.

* contact us for remote delivery feasibility** ratio varies depending on the program

Skills assessment methods

Assessment of skills acquired during the Training Hybrid Search - Mastering BM25 and Vectors for RAG program is performed through:

  • During training: case studies, hands-on labs and professional scenarios
  • End of training: self-assessment questionnaire and skills evaluation by the trainer
  • After training: completion certificate detailing acquired skills

Program accessibility

Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.

Enrollment terms and lead times

Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.

The Learni story

Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.

Our method

How Learni guarantees the quality of your Hybrid Search training

Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.

Step 1

Rigorous trainer selection

Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.

  • Triple validation: technical, pedagogical, sectoral.
  • Minimum rating 4.8/5 over the last 12 sessions.
Step 2

You meet the trainer beforehand

30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.

  • Live briefing on goals and team context.
  • Veto right — we swap the trainer for free if needed.
Step 3

Content tailored to your context

No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.

  • Hands-on cases drawn from your stack and projects.
  • Program co-written then validated by your team.
Step 4

Continuous quality follow-up

Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.

  • NPS, knowledge quizzes and skills self-assessment.
  • Satisfaction guarantee: fully satisfied or free rework.

A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.

A child walking to school with a backpack
Our social commitment

A school kit donated to a child for every training booked

To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.

  • Backpack, notebooks and essential supplies
  • Distributed through our partner charities
  • Included, at no extra cost to you
Enroll and offer a kit
FAQ

Hybrid Search: frequently asked questions

Which tools are used in Hybrid Search training?+
Hands-on work runs on elasticsearch, TF-IDF, sentence Transformers, FAISS, reciprocal Rank Fusion and cohere Rerank. Those tools come from the Hybrid Search program itself, delivered on site over 4 days, so participants practise on the stack they will use at work.
What can participants do after Hybrid Search training?+
They can master BM25 algorithms for professional lexical search, develop high-performance vector indexes with advanced embeddings and implement hybrid search fusion for maximum relevance. Those are the stated objectives of the Hybrid Search program at Advanced level, checked by the end-of-session assessment.
What does the Hybrid Search program cover, day by day?+
Day 1: Hybrid Search: BM25 Fundamentals and Data Preparation (Elasticsearch, TF-IDF). Day 2: Hybrid Search: Vector Search and Embeddings (Sentence Transformers, FAISS). Day 3: Hybrid Search: BM25-Vector Fusion and Reranking (Reciprocal Rank Fusion, Cohere Rerank). Day 4: Hybrid Search: Optimization, Deployment, and Monitoring (Kubernetes, Prometheus). The Hybrid Search program runs over 4 days, delivered on site.
How is Hybrid Search training assessed?+
Assessment relies on advanced MCQ on hybrid search algorithms and metrics, assessment via end-to-end hybrid RAG project and technical presentation to AI search experts. Learni issues a completion certificate together with the individual assessment report at the end of the Hybrid Search program, which an L&D team can file as evidence.
How much does Hybrid Search training cost per participant?+
Hybrid Search training costs $4,620 per participant. For an in-company team, the flat rate starts at $7,865 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.
How long does Hybrid Search training take?+
4 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for Hybrid Search training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before Hybrid Search training?+
Proficiency in Python, NLP fundamentals, vector embeddings, and Elasticsearch or Pinecone.
Is a certificate issued after Hybrid Search training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
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