Senior Fullstack Developer (.NET)

About us:

Talent has no borders. Proxify's mission is to connect top developers around the world with opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction. 🙂

Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives.

Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.

The Role:

We are looking for a Senior Fullstack .NET Developer to join our fast-growing Network. In this role, you’ll own the design and implementation of backend services and APIs using .NET (C# / ASP.NET Core), while delivering polished, performant user interfaces using modern frontend technologies and .NET-driven UI frameworks. You will collaborate with product managers, designers, and other engineers to deliver end-to-end features, make architectural decisions, and mentor more junior engineers.

This is a long-term, full-time remote engagement. You’ll have the opportunity to work with modern cloud platforms, CI/CD pipelines, and deliver impactful features in real products used by customers around the world.

What we are looking for:

• 5+ years of professional software development experience, with strong fullstack exposure.

• Relational databases - MSSQL experience.

• 3+ years of production experience with .NET (C#, .NET Core / .NET 6+) and ASP.NET Core.

• Solid knowledge of JavaScript/TypeScript, HTML5 and CSS3, or experience with .NET UI frameworks such as Blazor and Razor Pages.

• Experience with relational databases (e.g., SQL Server, PostgreSQL) and ORM tooling such as Entity Framework Core.

• Strong understanding of RESTful API design and integration patterns.

• Experience with automated testing (unit, integration) and test frameworks for both backend and frontend.

• Practical experience with containerization (Docker) and familiarity with CI/CD pipelines (e.g., GitHub Actions, Azure DevOps, GitLab CI).

• Experience deploying and operating services in the cloud (Azure preferred, AWS/GCP acceptable).

• Ability to work independently and deliver high-quality results in a remote setup.

• Intermediate-advanced English

Nice-to-have:

• Deep experience with TypeScript and modern frontend tooling (Vite, Webpack).

• Proven experience with Blazor, ASP.NET MVC or other .NET-centric UI frameworks.

• Familiarity with microservices patterns, DDD, CQRS or event-driven architectures.

• Experience with container orchestration (Kubernetes).

• Knowledge of message brokers (e.g., RabbitMQ, Kafka, Azure Service Bus).

• Experience with GraphQL and schema design.

• Exposure to performance tuning, caching strategies and observability (logs, tracing, metrics).

Responsibilities:

• Design, implement, and operate scalable backend services using .NET (C#, ASP.NET Core).

• Build and maintain responsive, accessible user interfaces using modern frontend technologies and/or .NET UI frameworks (e.g., Blazor, Razor Pages).

• Design and consume robust RESTful APIs (and optionally GraphQL) and integrate with databases and external systems.

• Ensure code quality through testing (unit/integration), code reviews, and automated pipelines.

• Drive architectural decisions for backend, frontend, and their integration (microservices, monoliths, or hybrid).

• Collaborate with designers and product teams to translate requirements into technical solutions and great user experiences.

• Troubleshoot production issues, optimize performance, and ensure application reliability and security.

• Mentor and coach other engineers, contribute to best practices and team processes.

• Participate in an agile development process and help continuously improve delivery and observability.

• Document design choices, API contracts, and deployment procedures.

What we offer:

Get paid, not played No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.

Predictable project hours Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.

Flex days, so you can recharge Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.

Career-accelerating positions at cutting-edge companies Discover exclusive long-term remote positions at the world's most exciting companies.

Hand-picked opportunities, just for you Skip the typical recruitment roadblocks and biases with personally matched positions.

One seamless process, multiple opportunities A one-time contracting process for endless opportunities, with no extra assessments.

Compensation Enjoy the same pay, every month with positions landed through Proxify.