Senior Software Engineer

Green Key Resources; New York (NY); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Green Key Resources is seeking a Senior C#/.NET Developer to join an application development team supporting business-critical applications in a regulated financial-services environment. The role is hands-on and focuses on building and modernizing enterprise applications, APIs, integrations, and services using C#, .NET, SQL Server, and Microsoft technologies.

The ideal candidate will bring strong software engineering experience, a solid understanding of CI/CD and Azure DevOps, and the ability to

Qualifications

• Bachelor's degree in computer science, engineering, or related field.
• 5+ years of professional software development experience; 10 years preferred.
• Expertise in C#, .NET Framework, and modern .NET development.
• Proficiency in SQL Server, including query development and performance troubleshooting.
• Practical experience with Azure DevOps, CI/CD pipelines, and software change controls.
• Knowledge of object-oriented design, secure coding, and automated testing.
• Experience in financial services or capital markets preferred.

Responsibilities

• Design and develop enterprise applications, services, APIs, and integration components using C#, .NET, and SQL Server.
• Modernize application components to improve security, documentation, and operational resilience.
• Build and enhance Azure DevOps repositories and CI/CD pipelines for efficient software delivery.
• Support trading workflows involving market data, messaging, and enterprise interfaces.
• Investigate and resolve production issues using logs, database queries, and monitoring tools.
• Provide technical leadership through mentoring, knowledge sharing, and development standards.
• Collaborate with stakeholders to deliver controlled solutions in a regulated environment.
• Ensure compliance with industry standards and best practices in software development.

Skills

C#/.NET development

API design

Mentoring

CI/CD understanding

Education

Bachelor's degree in computer science or engineering

Tools

Azure DevOps

SQL Server

Microsoft technologies

Job description

We’re looking for a Senior C#/.NET Developer to join an application development team supporting business-critical applications in a regulated financial-services environment.

This is a hands‑on senior engineering role focused on building and modernizing enterprise applications, APIs, integrations, and services using C#, .NET, SQL Server, and Microsoft technologies.

The ideal candidate will have strong software engineering experience, a solid understanding of CI/CD and Azure DevOps, and experience troubleshooting production applications. Experience with financial services, capital markets, trading systems, or market data is a plus.

Senior C#/.NET Developer Overview

• As a Senior C#/.NET Developer, you will design, develop, and modernize enterprise applications and services using Microsoft technologies.
• Collaborate with cross‑functional teams to deliver robust solutions in a regulated financial‑services environment.
• Lead technical initiatives, including design reviews, code reviews, and mentoring junior developers.
• Enhance application maintainability, testability, and performance while ensuring operational resilience.
• Utilize Azure DevOps for CI/CD pipelines, automated testing, and deployment controls.
• Investigate production issues, document root causes, and implement corrective actions.
• Work in a hybrid environment with opportunities for remote collaboration.
• Contribute to a dynamic team culture that values professional development and innovation.

Senior C#/.NET Developer Key Responsibilities & Duties

• Design and develop enterprise applications, services, APIs, and integration components using C#, .NET, and SQL Server.
• Modernize application components to improve security, documentation, and operational resilience.
• Build and enhance Azure DevOps repositories and CI/CD pipelines for efficient software delivery.
• Support trading workflows involving market data, messaging, and enterprise interfaces.
• Investigate and resolve production issues using logs, database queries, and monitoring tools.
• Provide technical leadership through mentoring, knowledge sharing, and development standards.
• Collaborate with stakeholders to deliver controlled solutions in a regulated environment.
• Ensure compliance with industry standards and best practices in software development.

Senior C#/.NET Developer Job Requirements

• Bachelor’s degree in computer science, engineering, or a related field.
• Minimum of 5 years of professional software development experience; 10 years preferred.
• Expertise in C#, .NET Framework, and modern .NET development.
• Proficiency in SQL Server, including query development and performance troubleshooting.
• Practical experience with Azure DevOps, CI/CD pipelines, and software change controls.
• Knowledge of object-oriented design, secure coding, and automated testing.
• Experience in financial services or capital markets preferred.
• Strong communication skills and ability to work collaboratively with stakeholders.