Overview of the Role

Citi, the leading global bank, has approximately 200 million customer accounts and does business in more than 160 countries and jurisdictions. Citi provides consumers, corporations, governments, and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, transaction services, and wealth management.

As a bank with a brain and a soul, Citi creates economic value that is systemically responsible and in our clients’ best interests. As a financial institution that touches every region of the world and every sector that shapes your daily life, our Enterprise Operations & Technology teams are charged with a mission that rivals any large tech company. Our technology solutions are the foundations of everything we do from keeping the bank safe, managing global resources, and providing the technical tools our workers need to be successful to designing our digital architecture and ensuring our platforms provide a first-class customer experience. We reimagine client and partner experiences to deliver excellence through secure, reliable, and efficient services.

Our commitment to diversity includes a workforce that represents the clients we serve from all walks of life, backgrounds, and origins. We foster an environment where the best people want to work. We value and demand respect for others, promote individuals based on merit, and ensure opportunities for personal development are widely available to all. Ideal candidates are innovators with well-rounded backgrounds who bring their authentic selves to work and complement our culture of delivering results with pride. If you are a problem solver who seeks passion in your work, come join us. We’ll enable growth and progress together.

Job Overview

We are seeking a skilled Fraud .NET Developer to design, develop, support, and maintain scalable applications that enable fraud detection, prevention, and investigation. This role requires strong hands‑on experience with .NET Core, microservices architecture, API development, database technologies, and production support in a highly regulated financial environment.

Key Responsibilities

Development & Engineering

• Design and develop automated workflows integrating multiple APIs, databases, and application user interfaces.

• Build, enhance, and maintain microservices-based applications using .NET Core and modern design patterns.

• Design, develop, and optimize database schemas, stored procedures, and functions to support high‑volume fraud processing.

• Collaborate with business partners, architects, and analysts to translate requirements into technical user stories and provide accurate development estimates.

SDLC, DevOps & Compliance

• Manage code promotion across environments and maintain required SDLC and compliance artifacts.

• Ensure code repository hygiene, including branching strategies, pull requests, peer reviews, and adherence to developer productivity and quality metrics.

• Participate in CI/CD pipelines, deployment automation, and release activities using DevOps tooling.

Production Support

• Provide production support for fraud applications, including monitoring, troubleshooting, and resolving application and data issues.

• Investigate and resolve production incidents, root cause defects, and performance issues in accordance with SLAs.

• Partner with operations and business teams to ensure application stability, availability, and reliability.

• Support post‑release validation, incident triage, and continuous improvement initiatives.

• Participate in on‑call or rotational support as required.

Testing & Release

• Participate in User Acceptance Testing (UAT) and defect resolution to meet release timelines.

• Support production deployments and ensure smooth post‑release operations.

Required Qualifications

Technical Skills

• Frontend Development

  • ASP.NET Core, MVC

  • JavaScript, Bootstrap, CSS

• Backend & Services

  • Microservices development using .NET Core

  • Strong understanding of microservices architecture and design patterns

  • RESTful API design and integration

• Database Technologies

  • MS SQL Server (T‑SQL)

  • Oracle (PL/SQL)

  • Couchbase or other NoSQL databases

  • Experience designing scalable, high‑performance database solutions

• DevOps & SDLC

  • Experience with tools such as GitHub, Lightspeed, Harness, and Tekton

  • Strong understanding of CI/CD pipelines, deployment automation, and release management

  • Experience working in regulated, compliance‑driven environments

Preferred Qualifications

• Experience with test automation using Selenium

• Understanding of AI fundamentals, including:

  • Prompt engineering

  • Model interaction and integration with enterprise AI tools

• Experience with containers and orchestration platforms, such as Docker and OpenShift

• Prior experience in fraud, risk, payments, or financial services technology

• Experience supporting mission‑critical production systems

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Primary Location:

Jacksonville Florida United States

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Primary Location Full Time Salary Range:

$96,960.00 - $145,440.00

In addition to salary, Citi’s offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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Anticipated Posting Close Date:

Jun 11, 2026

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.