USA Sr. Associate, Application Development

Santander•New York, NY

4d•$131,250 - $220,000

About The Position

Santander is a global leader and innovator in the financial services industry and is evolving from a high-impact brand into a technology-driven organization. Our people are at the heart of this journey and together, we are driving a customer-centric transformation that values bold thinking, innovation, and the courage to challenge what’s possible. This is more than a strategic shift. It’s a chance for driven professionals to grow, learn, and make a real difference. If you are interested in exploring the possibilities We Want to Talk to You! The Senior Developer, Application Development serves as a highly experienced, hands-on technical contributor supporting multiple complex application initiatives. This role plays a critical part in the analysis, design, development, troubleshooting, and maintenance of enterprise software solutions that support key business units. The Senior Developer operates with a high degree of autonomy, provides deep technical expertise across systems and components, and contributes to architectural decisions and delivery strategy. The role requires strong problem-solving skills, accurate workload estimation, and the ability to clearly communicate and drive solutions for complex technical challenges.

Requirements

Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent work experience - Required.
7+ years of hands-on application development experience, with strong expertise in Java and/or .NET / C# in a distributed systems. - Required.
Advanced proficiency in object-oriented programming and design patterns.
Proven expertise in modern software paradigms, including: Web and backend development Service-oriented and microservices architectures Cloud computing concepts Test-driven development (TDD) Domain-driven design (DDD)
Strong service-oriented architecture and integration experience.
Strong SQL and relational database skills.
Demonstrated ability to design and troubleshoot large-scale, high-availability systems.
Strong analytical, critical thinking, and problem-solving skills.
Excellent written and verbal communication skills.
Ability to manage multiple initiatives and context switch effectively.
Ability to continuously evaluate existing systems and drive improvements.
Commitment to maintaining industry knowledge, standards, and best practices.
Curiosity and aptitude for adopting new technologies and collaborating to deliver custom solutions.
Experience with frontend frameworks (Angular, React, JavaScript, TypeScript) strongly required.
Backend / server-side development expertise.
Experience with performance-critical, scalable systems is highly desirable.

Nice To Haves

Established work history or equivalent demonstrated through a combination of work experience, training, military service, or education.
Experience in Microsoft Office products.

Responsibilities

Act as a senior hands-on developer across multiple complex application initiatives.
Lead technical analysis, design, development, and maintenance of software applications and components.
Provide advanced expertise in troubleshooting complex application, system, and performance issues.
Design, implement, and support system enhancements, refactoring, and modernization efforts.
Research, evaluate, and implement solutions for performance monitoring, tuning, scalability, and system configuration.
Drive the development and maintenance of automated test suites and quality assurance practices.
Contribute significantly to technical design and architectural decisions for complex projects.
Accurately estimate effort, identify technical risks, and help plan delivery milestones.
Mentor and provide technical guidance to associate and mid-level developers.
Partner closely with architects, product owners, and business stakeholders to achieve key objectives.
Promote engineering best practices, code quality, and continuous improvement within the team.