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Base24 Developer

Yesterday 2025/06/20
Other Business Support Services
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Job Description

Calling all innovators – find your future at Fiserv.


We’re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.


Job Title


Base24 Developer

Job Title: Tandem Base24 Classic Developer


What does a successful Tandem Base24 Classic Developer do at Fiserv?


Fiserv is a world-class data and analytics organization delivering the next generation of powerful data insights and decisioning solutions to financial institutions, fintech, consumer/business credit bureaus, government agencies and merchants.   


As a successful Tandem Base24 Classic Developer, you will take a high-level strategy and work closely with the business and IT teams to develop an efficient and comprehensive solution to Fiserv's web systems and business service layers that perform well, are flexible, maintainable and compliant with all state and federal regulations.


What you will do:


  • Participate in all phases of the software development life cycle (architecture and conceptual design, requirements analysis, high level design, detailed design, coding, unit test, integration and system, user and performance level testing.)
  • Interface with other technical and development teams to develop solutions to Fiserv's processing systems.

What you will need to have:


  • Bachelor's degree in Information Technology and 3+ years of work experience programming and designing business applications.
  • Hands-on development and testing experience in Base24 Classic payment switch application hosted on HP Tandem.
  • Experience on the following Language/Tools Tandem concepts: TAL, TACL, SCOBOL, COBOL, Pathway, BATCHCOM, FUP, INSPECT, EINSPECT, BIND, SCF, SCUP.
  • Experience on ENSCRIBE/SQL databases.
  • Experience on usage of XPNET configuration and commands. Understanding of Base24 source codes, change and release management, application debugging and problem resolution.
  • Excellent analytical and troubleshooting skills experience on Base24 ATM, POS, Schemes, BIC ISO, Host ISO interchange interfaces. Knowledge of transaction testing tools or simulators.
  • Good understanding on ISO8583 message format.

What would be great to have:


  • Experience on TAL programming, debugging, defect fixing on HP Tandem systems.
  • Experience in handling ATM, POS, EMV, Tokenized transactions, etc for ACI BASE24-Classic Switch hosted on HP Tandem system.
  • Responsible for Design, Develop, Test, Build, Document and Troubleshooting capabilities to satisfy business requirements.
  • Responsible for Low Level Design creation from the Functional Specification document. Collaboration on Design, Build activities with onshore and client teams.
  • Conduct reviews of various artifacts: Design, Code and Test .Build and Configure applications to meet business process and application requirements.
  • Development aligning to the client coding standards and guidelines. Report the progress on agreed frequency to onshore team.

Thank you for considering employment with Fiserv.  Please:


  • Apply using your legal name
  • Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

What you should know about us:


Fiserv is a global leader in payments and financial technology with more than 40,000 associates proudly serving clients in more than 100 countries. As one of Fortune® magazine's "World's Most Admired Companies™" 9 of the last 10 years, one of Fast Company’s Most Innovative Companies, and a top scorer on Bloomberg’s Gender-Equality Index, we are committed to innovation and excellence. 


Our commitment to Diversity and Inclusion:


We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.


Warning about fake job posts:


Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information.


Any communications from a Fiserv representative will come from a legitimate business email address. We will not hire through text message, social media, or email alone, and any interviews will be conducted in person or through a secure video call. We won’t ask you for sensitive information nor will we ask you to pay anything during the hiring process. We also won’t send you a check to cash on Fiserv’s behalf.


If you see suspicious activity or believe that you have been the victim of a job posting scam, you should report it to your local law enforcement.



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