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Fiserv Tech Stack

Global fintech infrastructure and payment processing platform

IT Services and IT Consulting Milwaukee, Wisconsin 10,001+ employees Public Company

Fiserv operates at enterprise scale across payments, core banking, and risk management for financial institutions worldwide. The stack reveals dual-track modernization: a mature Java/Spring/Kafka foundation supports high-volume transaction processing, while aggressive adoption of Azure, SAFe, and generative AI tools (LangChain, LlamaIndex, RAG) signals an organizational shift toward cloud-native infrastructure and AI-assisted workflows. Hiring velocity is accelerating across engineering and sales, with notable leadership gaps in mainframe modernization and AML compliance—suggesting legacy system transition pressures.

Tech Stack 200 technologies

Core StackKafka RabbitMQ Java Maven AWS Snowflake Jenkins Jira Selenium Playwright Postman Workday Terraform JMS SFTP OpenAPI JSON Schema SQL OAuth 2.0 OpenID Connect mTLS JWT Spring Boot Azure Git JMeter Excel PowerPoint ISO 8583 AWS CDK+170 more

AdoptingLangChain RAG SAFe Azure Six Sigma LlamaIndex

What Fiserv Is Building

◆Challenges

Reducing risk
Ensuring compliance with payment standards
Risk mitigation
Client satisfaction
Improving incident response efficiency
Modernizing legacy systems
Compliance with regulations
Improving code quality
Cost and risk management
Compliance with labor law

▲Active Projects

Incident management
Conversion and startup projects
Ai platform implementation and review
Roadmap development for fraud product
Agentic workflow automation for development processes
Merchant onboarding
Direct sales of card terminals and payment acceptance
Enterprise-wide ai tool integrations
Customer care and call center transformation initiatives
Credit card portfolio conversion

Hiring Activity

Accelerating600 roles · 360 in 30d

Department

Engineering

199

Sales

71

Ops

63

Finance

51

Product

39

Support

39

Manufacturing

28

Data

20

Seniority

Senior

272

Mid

114

Junior

54

Manager

50

Director

31

Lead

25

Intern

14

VP

8

Notable leadership hires: Technical Lead, Mainframe Engineering Director, AML Compliance Lead, Chief of Staff, Customer Communication Lead

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About Fiserv

Fiserv is a publicly traded financial services technology company serving clients across more than 100 countries. The business spans payments processing, core banking platforms, risk and compliance tooling, mobile and online banking channels, lending solutions, and customer data insights. The company operates at 10,000+ headcount with distributed teams across North America, Europe, South America, Asia, and India. Recent project activity centers on fraud product roadmaps, merchant onboarding automation, payment acceptance (card terminal sales), incident management, and call center modernization—alongside company-wide integration of AI tools and legacy credit card portfolio conversions.

HeadquartersMilwaukee, Wisconsin

Company Size10,001+ employees

Hiring MarketsUnited States, Colombia, Singapore, Argentina, Canada, United Kingdom, Ireland, Poland

Frequently Asked Questions

What technology stack does Fiserv use?

Core stack: Kafka, RabbitMQ, Java, Spring Boot, SQL, AWS, Azure, Snowflake. Integration/security: OAuth 2.0, OpenID Connect, mTLS, JWT, OpenAPI, JSON Schema. Testing: Selenium, Playwright, JMeter. DevOps: Jenkins, Jira, Git, Terraform, AWS CDK.

What generative AI tools is Fiserv adopting?

Fiserv is adopting LangChain, LlamaIndex, and RAG frameworks alongside enterprise-wide AI tool integrations and agentic workflow automation for internal development processes.