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Seznam.cz Tech Stack

Czech search engine and web portal with data infrastructure and ML search focus

Technology, Information and Internet Praha, Czech Republic 1,001–5,000 employees Founded 1996 Privately Held

Seznam.cz is the dominant search engine and web portal in Czech Republic, operating at scale across millions of queries daily. The tech stack reveals a heavy investment in data engineering (Keboola, Snowflake, BigQuery, Kafka, PySpark) paired with ML infrastructure (PyTorch, Kubeflow, XGBoost, CatBoost) — suggesting the core challenge is less about scale per se and more about relevance and ranking. Active projects in vector search, entity detection, and image search relevance underscore a shift from keyword-based search toward semantic and visual understanding.

Tech Stack 31 technologies

Core StackSnowflake Tableau Python BigQuery Flask MySQL MariaDB Elasticsearch Redis Kafka Docker Kubernetes pandas PySpark PyTorch Kubeflow Linux C++ PostgreSQL RAG Keboola Looker Studio SQL R SQLAlchemy Polars XGBoost CatBoost Git OpenStack

AdoptingMCP

What Seznam.cz Is Building

◆Challenges

Standardizing data practices
Integrating data pipelines
Developing marketing analytics models
Optimizing performance for millions of queries
Scaling infrastructure in kubernetes
Handling complex large rapidly changing data
Classic programming insufficient for problems
Improving relevance vector search
Optimizing search engine performance
Handling millions of queries

▲Active Projects

Building data culture in marketing
Professionalizing data work in keboola, snowflake, tableau
Developing marketing analytics models
Backend development for sreality.cz services
Scaling infrastructure in kubernetes
Html document encoding
Image search relevance vector search
Entity detection in queries
Findhub mcp server development
Search engine optimization

Hiring Activity

Accelerating5 roles · 3 in 30d

Department

Engineering

2

Marketing

1

Product

1

Research

1

Seniority

Mid

3

Junior

1

Senior

1

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About Seznam.cz

Seznam.cz operates the most-visited web portal and search engine in the Czech Republic, serving millions of daily queries across web, image, and news verticals. Founded in 1996 as the country's first web portal, the company has grown to 1,001–5,000 employees and operates from Prague, with additional hiring activity in Canada. Beyond search, Seznam owns and operates real estate services (sreality.cz) and maintains a full-stack advertising and media business. The organization is actively scaling backend infrastructure on Kubernetes and professionalizing data practices across marketing, analytics, and ML teams.

HeadquartersPraha, Czech Republic

Company Size1,001–5,000 employees

Founded1996

Hiring MarketsCzechia, Canada

Frequently Asked Questions

What is Seznam.cz's tech stack?

Core stack: Keboola, Snowflake, Kafka, Elasticsearch, Redis, Kubernetes, Docker. Analytics: Tableau, Looker Studio, BigQuery, SQL. ML/modeling: PyTorch, Kubeflow, XGBoost, CatBoost, PySpark. Backend: Python, Flask, C++, PostgreSQL, MySQL. Currently adopting MCP (Model Context Protocol).

What products does Seznam.cz operate?

Primary search engine and web portal. Also operates sreality.cz (real estate services). Active development includes image search relevance, entity detection in queries, and findhub MCP server integration.