All work
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LenskartE-Commerce

Personalized product discovery at scale.

How Query Quotient transformed Lenskart's search experience, delivering personalized product discovery to millions of customers with fast, relevant results.

300%
increase in conversion
<100ms
response times
60%
improvement in relevancy
The challenge

Lenskart, India's largest eyewear retailer with over 500 stores and millions of online customers, faced critical challenges in delivering a first-class digital shopping experience:

Complex product attributes

5000+ SKUs with intricate attributes - frame shape, material, color, size and lens type - were undermining search accuracy.

Personalization at scale

Personalized recommendations for 10M+ users based on face shape, preferences and purchase history were computationally intensive.

Peak traffic handling

During sale events traffic spiked 10x, causing search failures and lost sales.

Inventory synchronization

Out-of-sync inventory between 500+ stores and online meant out-of-stock items kept appearing in search.

Our approach

We designed an Elasticsearch solution that combined advanced search with machine learning-powered personalization.

01

ML-powered product discovery

Search that understands customer intent and preferences:

  • Natural language processing for queries like "round glasses for oval face"
  • Visual search for "find similar" functionality
  • Dynamic re-ranking based on user behavior and preferences
  • Faceted search with filter suggestions
02

Personalization at scale

Real-time personalization that scales to millions of users:

  • User profile-based scoring adjustments in real time
  • Collaborative filtering for "customers also bought" recommendations
  • A/B testing framework for continuous optimization
  • Contextual recommendations based on browsing patterns
03

Auto-scaling architecture

Infrastructure that absorbs extreme traffic variation:

  • Predictive scaling based on historical patterns and upcoming sales
  • Multi-layer caching reducing database load by 80%
  • Circuit breakers and fallback mechanisms for resilience
  • CDN integration for static search assets
04

Real-time inventory integration

Search results that reflect what is actually in stock:

  • Event-driven architecture for instant inventory updates
  • Store-specific search results based on user location
  • Predictive stock-out prevention algorithms
  • Automated de-ranking of low-stock items
The results

The work delivered clear business and technical results:

Business metrics

  • 300% increase in conversion rate
  • 45% increase in average order value
  • 60% reduction in cart abandonment
  • 25% increase in repeat purchases

Technical outcomes

  • Sub-100ms search response time
  • 99.99% search availability
  • 10x traffic handling capability
  • Real-time inventory accuracy

Scale

  • 10M+ monthly searches
  • 5000+ products indexed
  • 500+ stores connected

Before

  • Generic search results for all users
  • 3-5 second search response times
  • Limited filtering options
  • Frequent "no results found"
  • Manual browsing required

After

  • Personalized results for each user
  • Sub-100ms response times
  • Smart filters with counts
  • Relevant results, even for vague queries
  • Guided discovery experience
“Query Quotient revolutionized our digital commerce capabilities. The personalized search experience they built has become our competitive advantage. Our customers now find exactly what they're looking for in seconds, and our conversion rates have exceeded all expectations. The 300% increase in conversions speaks for itself.”
— Amit Sharma, Chief Digital Officer, Lenskart

Why it matters for AI

Natural-language queries, visual similarity and personalized re-ranking are the retrieval foundation for AI shopping assistants. Getting them fast and accurate on a complex catalog is what makes conversational commerce trustworthy.

Technologies

Elasticsearch 8.xTensorFlowRedisKubernetesCloudFront CDN

Search features

Typo tolerance & spell correctionRegional synonym managementVoice searchAutocomplete with categoriesVisual similarity search

More work

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