C++ Developer

This job is with Fiserv, an inclusive employer and a member of my Gwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly.

Calling all innovators - find your future '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  Title
C++ Developer  About your role:
We are looking for an experienced C++ Developer to build, and support high‑throughput, low‑latency payment gateway systems. This role is critical to the reliability, scalability, and correctness of our payment platform, which operates in a 24×7, mission‑critical environment. You will work closely with product, infrastructure, and QA teams to deliver highly resilient systems that process transactions t you'll do:
Utilize your server‑side and systems engineering experience to understand business constraints and payment domain requirements, elevating the quality, stability, and performance of the platform over time
Develop new features. Investigating, reproducing, and resolving production issues
Improve performance, reliability, and code quality
Take full ownership of merchant‑ and transaction‑facing services from development through deployment and production monitoring
Work closely with the Infrastructure and DBA teams to design efficient Oracle data models, transaction flows, and failover strategies that support high TPS and high availability
Write and maintain automated tests and diagnostic tooling to ensure system correctness and regression safety
Support and operate the payment platform in production, including troubleshooting live issues, root‑cause analysis, and preventive improvements
Follow Agile SDLC and participate in planning and Scrum boards
Experience you'll need to have:
8+ years of professional C++ development experience, building and supporting large‑scale, server‑side systems
6+ years of experience developing high‑performance, multi‑threaded, low‑latency applications
6+ years of hands‑on experience with mission‑critical or high‑TPS systems, ideally in payments, financial services, or transaction processing domains
6+ years of experience with Oracle databases, including: SQL and PL/SQL as well as Pro
* C or equivalent embedded SQL approaches
6+ years of experience in debuggin across production environments, including memory issues, performance bottlenecks, and intermittent failures
Bachelor's degree in computer science, Information Technology, Information Systems, or a related field (or foreign equivalent degree) or equivalent work experience.
Experience that would be great to have:
Prior experience working on payment gateways, switching systems, or financial transaction platforms
Familiarity with high‑availability architectures, active‑active deployments, and disaster recovery setups

Experience with Linux system internals, networking, and performance tuning
Exposure to cloud platforms (AWS, Azure, or GCP) in hybrid or on‑prem payment environments
Important information about this role:
This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.

This is a full-time, direct-hire position, and no contract options for unsolicited agency submissions will be considered.

All offers of employment are contingent on standard background checks. Fiserv and certain of its affiliated companies are federal, state, and/or local government contractors. Should this position support a Federal Government contract, now or in the future, the successful candidate will be subject to a background check conducted by the U.S. Government to determine eligibility and suitability for federal contract employment for public trust or sensitive positions.

Positi…