LinkedIn Tech Stack

Professional network platform with talent, marketing, and sales solutions

Software Development Sunnyvale, CA 10,001+ employees Public Company

LinkedIn operates a diversified business across talent acquisition, marketing, and sales solutions, serving over 1 billion members including Fortune 500 leadership. The tech stack spans distributed systems (Kafka, Samza, Hadoop, Pinot) paired with Microsoft cloud infrastructure (Azure, Sentinel, KQL), reflecting dual engineering cultures — one optimized for massive-scale member data, the other for enterprise integration. Current hiring acceleration (350 roles posted in 30 days) is concentrated in engineering and sales, while active projects signal a pivot toward AI evaluation pipelines and LLM infrastructure, alongside effort to improve API product adoption and developer productivity.

Tech Stack 168 technologies

Core StackReact Azure AD Python Oracle MySQL Linux Apache Kafka Hadoop Salesforce C# Terraform OPC UA MQTT Microsoft Sentinel Microsoft 365 KQL Azure Monitor Azure Data Explorer Jupyter PowerShell Bash Excel SQL Teradata R Unix Apache Samza Apache Pinot Espresso REST API+133 more

AdoptingFirefly Jasper Adobe Express eBPF

What LinkedIn Is Building

◆Challenges

Inefficiencies in process
Fast experimentation
Low adoption of api products
Improving engineering productivity
Generating new business
Scaling compute infrastructure
Increasing efficiency
Improving developer productivity
Sox compliance
Ads traffic quality

▲Active Projects

Ai-generated model evaluation
Next-generation infrastructure and platforms
Large language models
Next-generation observability platform
Ai labor marketplace
New bespoke sales motion for hipo acquisition
Strategic plans for the territory
Field commercial models
Safety guardrails and evaluation pipelines
Linkedin talent solutions sales

Hiring Activity

Accelerating650 roles · 350 in 30d

Department

Engineering

247

Sales

168

Data

Product

Marketing

Finance

Design

Seniority

Senior

223

Staff

113

Mid

100

Manager

Director

Principal

Junior

Intern

Notable leadership hires: Account Director, Enterprise Account Director, Client Director, Creative Director, Global Client Director

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About LinkedIn

LinkedIn connects professionals globally through a platform combining jobs, recruitment, company search, and professional identity features. The company operates four revenue streams: Talent Solutions (recruiting tools), Marketing Solutions (advertising), Sales Solutions (engagement and CRM tools), and Premium Subscriptions. With over 1 billion members and offices across the globe, LinkedIn operates at scale requiring distributed infrastructure spanning Kafka for streaming, Teradata and Oracle for transactional data, and Apache Pinot for analytics. The organization is actively scaling engineering and sales capacity while addressing internal challenges around API adoption, developer productivity, and compute infrastructure efficiency.

HeadquartersSunnyvale, CA

Company Size10,001+ employees

Hiring MarketsUnited States, South Korea, Ireland, India, Australia, China, Singapore, Malaysia

Frequently Asked Questions

What tech stack does LinkedIn use?

LinkedIn runs React on front-end, Apache Kafka and Samza for streaming, Hadoop and Pinot for distributed computing, Teradata and Oracle for databases, and Microsoft Azure (AD, Sentinel, Monitor, Data Explorer) for cloud infrastructure. The stack reflects both custom-built distributed systems and Microsoft enterprise integrations.

What is LinkedIn working on?

Active projects include AI-generated model evaluation, large language models, next-generation observability platforms, AI labor marketplaces, and safety guardrails for AI. Internal focus also includes improving API product adoption, developer productivity, and scaling compute infrastructure.