C++ Developer

Fiserv • Berkeley Heights, NJ

20h • Onsite

About The Position

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 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 at scale. What 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

Requirements

• 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 ProC 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.

Nice To Haves

• 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

Responsibilities

• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level