We are seeking a Senior .NET Developer to lead and contribute to the design, development, and optimization of enterprise-grade web and client-server applications. This role requires a proactive problem-solver with modern .NET expertise, deep experience in cloud-first architectures, and a passion for driving technical innovation.
You will collaborate with cross-functional teams, mentor junior developers, and influence architectural decisions. The ideal candidate is well-versed in modern .NET ecosystems, cloud technologies (AWS and Azure), DevOps pipelines, and secure, scalable API design.

REQUIRED QUALIFICATIONS

Deep expertise in .NET Core / .NET 6+ / .NET 8, C#, and modern design patterns (e.g., Dependency Injection, CQRS, Clean Architecture).
Proven experience with REST APIs, microservices, and asynchronous programming.
Strong front-end experience with Angular (v12+ or later), TypeScript, HTML5/CSS3, Bootstrap, and JavaScript frameworks.
Advanced experience with Entity Framework Core, LINQ, SQL Server, and designing performant database structures.
Experience with Azure services (App Services, Functions, Key Vault, SQL DB, Azure DevOps, etc.) or AWS equivalent.
Familiar with containerization tools such as Docker and orchestration platforms like Kubernetes is a strong plus.
Experience working with Salesforce APIs or platform is a plus.
Knowledge of secure coding standards, authentication protocols (OAuth2, OpenID Connect), and compliance frameworks.
Requires excellent verbal and written communication skills. Must have the ability to provide the “basic” explanation of technology for nontechnical managers, directors and above.
Demonstrates ownership, manages multiple deliverables simultaneously by adjusting priorities and eliminating roadblocks.
Demonstrates character, integrity and ethical values.
Possesses a customer-oriented service attitude.
Adheres to the policies regarding acceptable behavior.
This is a hybrid position that will require 2-3 days on site at our Nassau county NY location.

EDUCATION AND EXPERIENCE

10+ years of hands-on experience in software development with .NET technologies.
Bachelor or Master’s degree in Computer Science, Software Engineering, or related field strongly preferred.
Industry technical certifications a plus.

Lead the design and development of scalable, secure, and high-performance applications using modern Microsoft technologies.
Collaborate with Solution Architects and Business Analysts on architecture, requirements, and planning
Drive modernization initiatives by refactoring legacy applications to modern frameworks (.NET 8+, cloud-native).
Build and maintain RESTful APIs, web applications, and background services using .NET Core / .NET 8.
Champion DevOps best practices, including CI/CD automation, infrastructure as code, and testing pipelines.
Guide and mentor junior team members, conduct code reviews, and ensure adherence to coding standards.
Investigate emerging technologies to propose and implement improvements to software architecture and development processes.
Ensure compliance with industry standards such as OWASP, HIPAA, PCI-DSS, and ISO 27001.