Company profile

Addendum Tech Stack

Enterprise software engineering and IT outsourcing for regulated industries

IT Services and IT Consulting Los Angeles, California 51–200 employees Founded 2009 Privately Held

Addendum is a Los Angeles-headquartered IT services firm delivering custom enterprise software, augmented teams, data/BI and QA work. Its stack centers on Java, Spring Boot and Oracle running on Kubernetes and OpenShift with Jenkins and CloudBees CI, alongside a GCP data layer (BigQuery, Dataflow, Dataform). Accelerating, senior-weighted engineering hiring around reconciliation systems and IntelliMatch points to financial-operations modernization work.

Tech Stack 95 technologies

Core StackJira ServiceNow Java Docker Kubernetes OpenShift Helm SonarQube Jenkins Angular PL/SQL Hibernate Oracle SAP .NET Playwright Postman Confluence BigQuery Spring Boot CloudBees Gradle IntelliJ IDEA Unanet Oracle EBS Swagger GCP Dataform Dataflow Google Cloud Functions+65 more

What Addendum Is BuildingChallenges and projects from their job posts

◆Challenges

Modernizing and integrating legacy applications
Complex reconciliation workflows needing optimization
High volume of IT incidents
Complex IT infrastructure undergoing transformation
Many technology initiatives running in parallel
Ensuring compliance and quality

▲Active Projects

Reconciliation workflow architecture
IntelliMatch system optimization
System modernization and technology uplift initiatives
Custom backend component development

Hiring Activity

Accelerating20 roles · 10 in 30d

Department

Engineering

Finance

Support

Ops

Seniority

Senior

Mid

Junior

Companies like Addendum

3,100+ IT Services and IT Consulting companies running Jira and ServiceNow

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About Addendum

Addendum is a privately held IT services company founded in 2009 and headquartered in Los Angeles, California, with 51–200 employees. It provides enterprise software development, IT resource outsourcing and augmented teams, data management and BI, IT consulting, and software quality assurance. Clients come mainly from fintech, banking, telecom and government sectors. The firm staffs product and project managers, business analysts, architects, engineers, data warehouse specialists, QA engineers and DevOps practitioners. Current hiring spans the United Kingdom, the Netherlands, Germany and India.

HeadquartersLos Angeles, California

Company Size51–200 employees

Founded2009

Hiring MarketsUnited Kingdom, Netherlands, Germany, India

Frequently Asked Questions

What tech stack does Addendum use?

Addendum works with Java, Spring Boot, Hibernate, Oracle and PL/SQL, Angular and .NET, deployed via Docker, Kubernetes, OpenShift and Helm, with Jenkins, CloudBees and SonarQube, plus GCP tools like BigQuery and Dataflow.

What countries does Addendum hire in?

Addendum is currently hiring in the United Kingdom, the Netherlands, Germany and India, with hiring weighted toward senior and mid-level engineering roles.

What is Addendum working on?

Active work includes reconciliation workflow architecture, IntelliMatch system optimization, custom backend component development, and system modernization and technology uplift initiatives.

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How this profile is built

Addendum's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.