We are seeking a highly skilled and experienced Senior C# and Python Developer to join our team. The ideal candidate will be responsible for developing new .NET client libraries for our data platform, maintaining existing .NET and Python libraries, and supporting our desktop data browser and Excel DNA add-ins. This role requires a proactive individual who can provide L3 support, troubleshoot production issues, and contribute to lower environment support on a rotational basis.
Responsibilities:
- Design, develop, and implement new .NET client libraries using .NET Core for seamless integration with our data platform, with a strong focus on Multithreading and LINQ.
- Maintain and enhance existing .NET libraries, ensuring high performance, reliability, and scalability.
- Develop and maintain Python libraries for data platform interactions.
- Support and improve the desktop data browser application, ensuring a robust user experience.
- Develop and maintain Excel DNA add-ins to extend data platform functionality within Excel.
- Provide L3 support for production issues, including root cause analysis and timely resolution.
- Perform troubleshooting for issues across various environments (development, UAT, production).
- Participate in a rotational schedule for lower environment support, ensuring smooth operations and stability.
- Collaborate with cross-functional teams to understand requirements and deliver high-quality solutions.
- Write comprehensive technical documentation for all developed components and systems.
- Participate in code reviews to ensure code quality, adherence to best practices, and knowledge sharing.
Required Skills and Qualifications:
- Experience: 6+ years of professional software development experience.
- C#/.NET: Strong proficiency in C# and .NET Core, with extensive experience in Multithreading and LINQ for developing client libraries and desktop applications. Familiarity with .NET Framework for existing libraries is a plus.
- gRPC: Hands-on experience with gRPC for building high-performance, language-agnostic service communication.
- WPF and WinForms: Hands-on experience with Windows Presentation Foundation (WPF) and Windows Forms (WinForms) for building desktop applications.
- Python: Expert-level knowledge of Python, including experience with library development and data manipulation.
- Unit Testing: Strong understanding and experience with unit testing frameworks and practices for C# and Python.
- Security: Strong understanding of secure coding practices and a good sense of security in software development.
- Excel DNA: Proven experience in developing and maintaining Excel DNA add-ins.
- Troubleshooting & Support: Excellent problem-solving skills with a strong ability to provide L3 support and troubleshoot complex production issues.
- Communication: Strong verbal and written communication skills, with the ability to articulate technical concepts clearly.
- Teamwork: Ability to work effectively in a collaborative team environment.
- Proactive: Self-motivated and proactive in identifying and resolving issues.
Preferred Qualifications:
- Experience with data platforms and related technologies.
- Familiarity with CI/CD pipelines and DevOps practices.
- Experience in financial services or a related regulated industry.
- Knowledge of various testing methodologies and tools.
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Job Family Group: Technology------------------------------------------------------
Job Family:Applications Development------------------------------------------------------
Time Type:Full time------------------------------------------------------
Most Relevant Skills Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
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Skills Required
- 6+ years of professional software development experience
- Strong proficiency in C# and .NET Core
- Multithreading expertise
- LINQ experience
- Hands-on experience with gRPC
- Hands-on experience with WPF and WinForms
- Expert-level Python and library development experience
- Experience developing and maintaining Excel DNA add-ins
- Strong unit testing practices for C# and Python
- Strong secure coding practices and security awareness
- Ability to provide L3 support and troubleshoot production issues
- Familiarity with .NET Framework (existing libraries)
- Experience with data platforms
- Familiarity with CI/CD pipelines and DevOps practices
- Experience in financial services or regulated industry
- Knowledge of various testing methodologies and tools
Citi Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Citi and has not been reviewed or approved by Citi.
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Healthcare Strength — Benefits coverage is positioned as comprehensive, including health, dental, and vision insurance plus on-site clinics, prescription drug support, and disability coverage. Family-building support such as fertility assistance is described as a notable differentiator within the overall package.
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Retirement Support — Retirement benefits are framed as strong, highlighted by a 401(k) with matching and additional plan options like a Roth 401(k). Financial support is reinforced through discounts and broader financial guidance resources tied to the benefits ecosystem.
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Wellbeing & Lifestyle Benefits — Wellbeing support extends beyond insurance through programs like an Employee Assistance Program, counseling/legal resources, and gym or wellness reimbursement. These offerings increase the perceived total rewards value even when cash compensation sentiment varies by role.
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