Sr. Fullstack .Net Developer

About the job

• This role is NOT open to C2C. The position is FTE only and is unable to consider sponsorship now or in the future*

Job Title: Sr. Fullstack .Net Developer Location: New York City, NY Job Summary

• We are seeking a senior, full-stack engineer who thrives on owning complex systems from end to end. This role is well-suited for someone who can balance system modernization with operational stability while delivering meaningful impact across the organization.
• As a key member of the engineering team, this individual will collaborate closely with cross-functional agile teams to design and deliver software solutions that support daily business operations. The role involves bringing product vision to life across a mix of on-premises and cloud-based architectures.
• A huge plus would be someone using more recent tools like Azure, Docker, Kubernetes, etc...

Primary Responsibilities

• Design, develop, and support scalable .NET applications spanning web, API, and background processing components
• Enhance and modernize existing platforms while ensuring the reliability of critical production systems
• Collaborate with Solution Architects to implement established architectural patterns and technical standards
• Act as a contributor to the technical backlog, partnering with the team to identify, prioritize, and address technical debt
• Proactively identify opportunities for improvement and translate them into actionable user stories
• Develop and maintain CI/CD pipelines, automated testing frameworks, and deployment workflows
• Work closely with product owners and engineering teams to deliver solutions for high-priority business needs
• Monitor system performance and reliability through logs, metrics, and dashboards
• Produce and maintain clear documentation covering system design, architecture decisions, and development practices
• Participate in user acceptance testing, production deployments, and on-call support rotations
• Stay up to date with emerging technologies and best practices, sharing knowledge across the team

Education Requirements

• High School Diploma or equivalent required
• Bachelor’s degree in Computer Science or a related field preferred (or equivalent hands-on experience)

Required Experience, Skills & Knowledge

• 5–8 years of progressive software engineering experience, including development of .NET applications using C# (.NET 6+, Windows Services, WinForms)
• 3–5 years of experience building modern web applications using TypeScript (Vue.js preferred)
• 3–5 years of experience designing, developing, and maintaining SQL Server databases
• Prior experience within Financial Services environments is a plus
• Strong expertise in building RESTful APIs using C# (including Swagger and OData)
• Solid understanding of object-oriented programming principles and design patterns
• Experience working with containerized environments (Docker, Kubernetes, Helm)
• Familiarity with Agile development methodologies and team collaboration practices
• Experience developing solutions within a major public cloud platform (Azure preferred)
• Exposure to reporting and analytics tools such as Power BI, Tableau, or Informer
• Experience supporting or integrating with legacy systems (e.g., SOAP, Classic ASP, legacy ASP.NET)
• Working knowledge of architectural frameworks and principles such as SOLID, GoF, and Clean Architecture