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C1X Inc. Tech Stack

Full-stack programmatic advertising platform for premium publishers and advertisers

Information Technology & Services San Jose 51–200 employees Founded 2014 Privately Held

C1X operates a full-stack advertising technology platform spanning header bidding, RTB servers, and yield optimization for premium inventory. The engineering-heavy org (17 of 22 active roles) is focused on real-time data streaming, distributed processing on AWS, and SSP/DSP integrations—reflecting the infrastructure demands of sub-millisecond ad transactions. Stack mix of Java/Scala/Node.js on AWS (Lambda, EMR, DynamoDB, Spark) matches their pipeline: ingesting real-time bidding signals, processing at scale, and serving decisioning at low latency.

Tech Stack 93 technologies

Core StackJava Hibernate Node.js JavaScript Angular React NestJS Elasticsearch Figma Adobe Premiere Pro After Effects Adobe Illustrator Sketch Python Scala AWS AWS Lambda DynamoDB Apache Spark Hadoop Jakarta EE OpenRTB Android iOS HTML5 CSS Photoshop HTML AWS EMR MapReduce+60 more

What C1X Inc. Is Building

◆Challenges

Performance tuning
Exchange integrations
Scalable cloud-native infrastructure
Deployment automation
Performance monitoring
Scalable high-performance products
Ensuring quality of adtech platforms
Ssp & dsp integration
Large-scale log analysis
Ultra-low latency performance

▲Active Projects

Next-generation customer data management and marketing software
Scalable qa test suites for backend systems
Integration with various exchanges
Real-time data streaming pipelines
Cloud-native infrastructure design
Rtb server development
Distributed data processing pipelines on aws
Continuous integration and data quality best practices
Usage tracking and feedback loop implementation
High-performance advertising & marketing technology servers

Hiring Activity

Decelerating20 roles · 3 in 30d

Department

Engineering

17

Product

2

Design

1

Finance

1

Seniority

Senior

11

Mid

6

Lead

2

Junior

1

Manager

1

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About C1X Inc.

C1X is a Silicon Valley-based advertising and marketing technology company founded in 2014, focused on automating and transparency for premium publishers and advertisers. The platform integrates header bidding, programmatic exchange services, yield optimization, and native eCommerce ad serving in a single interface. They serve mid-market publishers, advertising agencies, and eCommerce marketplace operators seeking to reduce manual workflow and improve campaign performance through real-time audience matching and inventory decisioning. With 51–200 employees and headquarters in San Jose, the company operates with engineering-led product development and hiring concentration in India.

HeadquartersSan Jose

Company Size51–200 employees

Founded2014

Hiring MarketsIndia

Frequently Asked Questions

What technology stack does C1X use?

Java, Scala, and Node.js for backend services; React and Angular for frontend; AWS (Lambda, EMR, DynamoDB, Spark) for distributed data processing; Elasticsearch for search and log analysis; OpenRTB protocol for ad exchange integration.

What is C1X building?

Real-time data streaming pipelines, RTB server infrastructure, scalable QA test suites, cloud-native deployment automation, and customer data management software. Focus areas include SSP/DSP integration, low-latency performance optimization, and usage tracking systems.