Senior Application Developer - Securitized Products (Java & .NET)

Santander

5d•$175,000 - $220,000

About The Position

The Senior Developer, Application Development is a hands-on technical contributor responsible for developing, enhancing, supporting, and maintaining business-critical Fixed Income and Securitized Products applications. The role combines expertise in Java, C#/.NET, ASP.NET, API development, and SQL Server with strong business engagement to deliver reliable, scalable, high-performing solutions. The developer contributes to analysis, design, development, troubleshooting, production support, and modernization for applications supporting trading, operations, risk, market data, and reporting. The position requires understanding of Fixed Income and Securitized Products markets, strong analytical skills, and effective collaboration with business stakeholders and technology teams to address technical and operational challenges. The role also involves supporting platform stability, data integrity, operational resiliency, and maintainability; improving systems through modernization and automation; and mentoring developers while promoting engineering best practices. Applicants must be legally authorized to work in the United States full time without requiring employer sponsorship to commence employment.

Requirements

Bachelor’s degree in a related field, or equivalent demonstrated through a combination of work experience, training, military service, or education.
At least 9 years of information technology, technical application development, or similar experience.
At least 7 years of hands-on experience developing and supporting enterprise applications with C#/.NET, along with hands-on Java development experience.
Strong expertise in C#, Java, .NET Framework/.NET Core, ASP.NET MVC and web applications, RESTful APIs, backend services, object-oriented design principles, and design patterns.
Advanced Microsoft SQL Server experience, including T-SQL development, stored procedures, query optimization, database troubleshooting, and data analysis and reporting support.
Experience supporting Fixed Income and Securitized Products technology platforms.
Functional understanding of Fixed Income products and structured finance instruments, including MBS, ABS, CMBS, CMO, agency and non-agency securities, pass-through securities, and structured products.
Understanding of trade lifecycle management, Fixed Income trading workflows, Securitized Products trading and operational workflows, pricing and valuation, positions and inventory management, market data integration, reporting, and regulatory processes.
Understanding of cashflow generation and payment structures, pool and loan-level characteristics, principal and interest distributions, repayment and amortization, factor-based securities, and trade settlement and lifecycle events.
Ability to collaborate with traders, sales, operations teams, business analysts, and product owners to understand requirements, analyze issues, and deliver technology solutions.
Functional understanding of how MBS, ABS, CMBS, and related securitized instruments are originated, traded, priced, settled, serviced, and reported across front-office, middle-office, and operational workflows.
Legal authorization to work in the United States on a full-time basis without employer sponsorship to commence employment.

Nice To Haves

Established work history or equivalent demonstrated through a combination of work experience, training, military service, or education.
Prior experience supporting Capital Markets, Fixed Income, or Securitized Products trading businesses within an Investment Banking environment.
Experience supporting front-office and middle-office trading platforms.
Familiarity with Bloomberg, market data feeds, security master platforms, and trade processing ecosystems.

Responsibilities

Act as a senior hands-on C#/.NET developer supporting business-critical applications and services.
Design, develop, enhance, and maintain ASP.NET applications, APIs, backend services, and SQL Server-based solutions.
Provide advanced application support, resolve production issues, perform root cause analysis, and contribute to platform stability initiatives.
Partner with Fixed Income and Securitized Products business users, operations teams, and technology stakeholders to translate requirements into technical solutions.
Support and enhance platforms for trade processing, positions management, pricing, market data integration, reporting, and regulatory workflows.
Design and implement scalable, high-performance solutions that ensure data integrity, operational resiliency, and maintainability.
Develop and optimize SQL Server components, including T-SQL and stored procedures, and perform query tuning, data analysis, and troubleshooting.
Lead troubleshooting across application, database, integration, and performance-related issues.
Contribute to system modernization, technical debt reduction, automation, and continuous improvement.
Estimate development effort, identify technical risks, and support project planning and delivery commitments.
Mentor junior and mid-level developers and promote engineering best practices, code quality, and knowledge sharing.
Collaborate with architects, product owners, support teams, and business stakeholders to support successful delivery and operational excellence.
Maintain focus on data accuracy, controls, performance optimization, and operational efficiency.