Senior C# Back-End Developer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior C# Back-End Developer based in the United States.

This role sits at the core of a fast-evolving product transformation, where a services-driven organization is actively building a scalable, product-led platform for internal and future external use. You will be responsible for designing and delivering high-performance backend systems that power critical business workflows and customer-facing capabilities. Working in a remote-first, globally distributed environment, you will collaborate closely with product managers, front-end developers, and system architects to build robust APIs and integrations. The position requires strong technical depth in C# and modern .NET frameworks, with a focus on scalability, maintainability, and performance. You will contribute across the full software lifecycle, from design and development to testing and deployment. This is a high-impact engineering role in a culture built around autonomy, asynchronous collaboration, and engineering excellence.

• Design, develop, and maintain scalable backend systems using C# and modern .NET frameworks (including .NET 6+ and ideally .NET 10)
• Build and enhance APIs, services, database integrations, and system functionality supporting both internal and customer-facing platforms
• Collaborate with product managers, architects, and front-end developers to define requirements, technical approaches, and delivery timelines
• Develop and maintain RESTful APIs and integrations with third-party systems and internal services
• Write clean, secure, and well-documented code following modern software engineering best practices
• Implement unit and integration testing to ensure reliability and performance of core components
• Work with distributed teams to troubleshoot, optimize, and improve existing systems and features
• Ensure compliance with security, performance, and regulatory standards such as GDPR where applicable
• Participate in system design discussions and contribute to architectural decisions and technical direction

Requirements:

• 5+ years of professional back-end development experience with strong expertise in C# and .NET frameworks
• Strong proficiency in building scalable backend systems and RESTful APIs (Minimal API experience is a plus)
• Solid understanding of SQL databases, database design, and data modeling (NoSQL experience is a plus)
• Experience with Entity Framework or similar ORM technologies
• Understanding of dependency injection and modern backend architecture patterns
• Familiarity with AWS services such as S3, SQS, SNS, Lambda, SES, or similar cloud tools
• Strong problem-solving and algorithmic thinking skills
• Excellent communication skills, both written and verbal, in remote and cross-functional environments
• Ability to work independently while collaborating effectively in distributed teams
• Strong organizational and time management skills in fast-paced environments
• Commitment to continuous learning and technical growth

Benefits:

• Competitive base salary ($165,000–$180,000) with total compensation up to ~$200,000 including bonus and equity
• 10% target annual bonus paid quarterly based on performance
• Equity participation in the company
• Fully remote work within the United States
• Comprehensive medical, dental, and vision coverage (100% employee coverage, 50% dependent coverage)
• Flexible PTO policy (take what you need, when you need)
• Monthly long weekend (3-day weekend initiative)
• Remote work stipend to support home office setup
• Coffee or tea subscription perk
• Inclusive, distributed team culture with global collaboration