Senior Java/.NET Applications Developer – Fixed Income

Santander Holdings USA Inc; New York (NY); On-site; USD 175,000 - 220,000; Full time

Job summary

Santander Holdings USA Inc. is hiring a Senior Developer for Application Development to deliver and support business-critical Fixed Income and Securitized Products applications.

You will work hands-on with C#/.NET, Java, ASP.NET, APIs, and SQL Server, partnering with traders, risk, and operations to produce reliable, scalable solutions. You will analyze requirements, design robust systems, optimize performance, and mentor junior developers while supporting modernization and data integrity across

Qualifications

• 9+ years in Information Technology or related experience.
• 7+ years hands-on C#/.NET and Java development.
• Strong expertise in C#, Java, .NET Framework/.NET Core, ASP.NET MVC, RESTful APIs.

Responsibilities

• Act as a senior hands-on C#/.NET developer for business-critical applications.
• Design, develop, enhance, and maintain ASP.NET apps, APIs, and SQL Server solutions.
• Provide advanced production support, root cause analysis, and platform stability initiatives.
• Collaborate with traders, operations, and tech teams to translate requirements into reliable solutions.
• Lead troubleshooting across application, database, integration, and performance areas.
• Mentor junior/mid developers and promote engineering best practices.
• Contribute to modernization, automation, and technical debt reduction.

Skills

C#

Java

.NET Framework/.NET Core

ASP.NET MVC

RESTful APIs

T-SQL

SQL Server

Data analysis

Root cause analysis

Mentoring

Education

Bachelor's Degree in related field

Tools

SQL Server

ASP.NET

API Development

Web services

Job description

Santander Holdings USA Inc. is hiring a Senior Developer for Application Development to deliver and support business-critical Fixed Income and Securitized Products applications.

You will work hands-on with C#/.NET, Java, ASP.NET, APIs, and SQL Server, partnering with traders, risk, and operations to produce reliable, scalable solutions. You will analyze requirements, design robust systems, optimize performance, and mentor junior developers while supporting modernization and data integrity across