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OCLC Tech Stack

Global library technology platform serving 10,000+ institutions across 100+ countries

Technology, Information and Internet Dublin, OH 1,001–5,000 employees Founded 1967 Nonprofit

OCLC operates a mission-driven technology infrastructure for libraries worldwide, built on a polyglot stack spanning Java, Python, Ruby, and big-data tools (Hadoop, HBase, Cassandra, MongoDB). The organization is actively modernizing its flagship SaaS offering and search platform while investing heavily in ETL pipelines, data quality programs, and digital collections — a mix that reflects transition from legacy cataloging systems toward cloud-native, high-scale data solutions. Engineering dominance in the hiring mix (35 of 57 active roles) underscores the technical lift required to migrate workloads and improve platform reliability.

Tech Stack 48 technologies

Core StackAWS Selenium Maven Ruby Java MySQL Oracle Hadoop Cassandra MongoDB Python JavaScript JUnit Azure GCP Informatica PowerCenter Cucumber Gherkin Spring Framework Git Subversion HBase ZooKeeper MapReduce Perl Mockito JMock Gradle HTML CSS+18 more

What OCLC Is Building

◆Challenges

Enhancing search capabilities
Optimizing content delivery speed
Leadership development
Modernizing cataloging tools
Scalability and reliability of cloud infrastructure
Cost-effective cloud solutions
Security of cloud environments
High scale data solutions
Speed and execution in etl
Linked data integrations

▲Active Projects

Product strategy and roadmap development
Enhancing search capabilities within worldcat
Revitalizing flagship saas offering
Cataloging application lifecycle
End to end etl pipelines
Dataops and data quality programs
Digital collections platform
Backend capabilities
Transforming resource sharing products
Automating library workflows

Hiring Activity

Steady55 roles · 20 in 30d

Department

Engineering

35

Data

7

Product

5

HR

2

Ops

2

Sales

2

Design

1

Research

1

Seniority

Senior

23

Mid

10

Lead

9

Intern

7

Director

4

Junior

2

Manager

1

Principal

1

Notable leadership hires: Director Framework Services

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About OCLC

OCLC is a nonprofit technology organization that provides shared infrastructure and services to thousands of member libraries in more than 100 countries. The organization's core mission is making information more discoverable and accessible through collaborative technology platforms. Primary offerings include cataloging tools, resource-sharing systems, and search capabilities (notably WorldCat). OCLC operates from Dublin, Ohio, with a 1,000–5,000-person workforce spanning librarians, engineers, researchers, and product teams. The organization actively maintains and extends infrastructure across Azure, AWS, and GCP while managing large-scale datasets in support of library discovery and research workflows.

HeadquartersDublin, OH

Company Size1,001–5,000 employees

Founded1967

Hiring MarketsUnited States

Frequently Asked Questions

What cloud platforms does OCLC use?

OCLC operates across Azure, AWS, and GCP. The organization is managing cost-effective cloud adoption and addressing infrastructure scalability and security concerns as it modernizes services.

What programming languages and databases does OCLC use?

The stack includes Java, Python, Ruby, and JavaScript on the application side, with MySQL and Oracle for transactional data. Big-data workloads run on Hadoop, HBase, Cassandra, and MongoDB.