Senior MongoDB Database Engineer

As a Senior MongoDB Database Engineer, you will be responsible for designing, optimizing, and operating high-throughput, low-latency MongoDB platforms supporting mission-critical workloads at enterprise scale. You will bring hands-on experience with multi-terabyte to petabyte-scale clusters and architect resilient, high-performing sharded environments under heavy production load.

What you'll do:

• Lead end-to-end MongoDB performance optimization including query tuning, execution plan analysis, and index design
• Design and implement scalable data models optimized for high read/write throughput and low latency
• Architect and operate large-scale sharded clusters using range-based and hash-based strategies
• Optimize shard key selection, chunk distribution, and balancing to prevent hotspots and improve performance
• Manage cross-shard query efficiency and reduce scatter-gather impact across distributed workloads
• Support large production environments (hundreds of nodes, multi-region deployments) with a focus on availability and resilience
• Implement and maintain high availability, disaster recovery, and failover strategies across regions
• Automate database operations, monitoring, and maintenance tasks using Python or shell scripting
• Partner with application teams on data modeling, query design, and performance best practices
• Participate in 24x7 on call Support

• 6+ years of experience as a MongoDB Engineer or DBA in large-scale production environments
• 6 + years of experience in MongoDB sharding, replication internals, and distributed architecture design
• 2+ years of experience with Python, Powershell, RedHat Linux, Mac OS, IIS, and Active Directory
• 2+ years with cloud technologies such as Google Cloud and Azure
• Bachelor's degree in computer science, or a relevant field, or an equivalent combination of education, work, or military experience

Experience that would be great to have:

• Prior experience in the financial services industry
• Experience with database migration projects
• Prior exposure to microservices architectures, distributed systems, or streaming platforms
• Knowledge of complex technologies, tools, methodologies, the enterprise architecture, and emerging technologies in the industry
• Understanding of the relationship between information technology, business practices, consumer markets and industry and be able to apply that knowledge to support the needs of critical systems and projects

• Fiserv emphasizes in-person collaboration to help you grow your career while shaping the future of fintech, this role is on-site Monday through Friday
• This role requires being on-call during non-standard and/or overnight hours on a rotational basis
• This role requires flexibility to work overtime that includes weekends and holidays
• This role requires use of a computer and audio equipment

Travel:

• Approximately 0-5% travel off-site or to other office locations is expected

Salary Range

$128,000.00 - $216,000.00

These pay ranges apply to employees in New Jersey and New York. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.

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.