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Senior Backend Developer (.NET) at Proxify. Location Information: Time zone: CET (+/- 3 hours). About us:. .  . . Talent has no borders. Proxify's mission is to connect top developers around the world with the 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 .NET Developer to join one of our high-growth client teams as a core backend architect. In this role, you will lead the design and implementation of enterprise-level applications, moving beyond simple CRUD operations to build complex, high-throughput distributed systems.. .  . . You will be the technical engine behind the client’s product evolution, ensuring that their backend infrastructure is not only performant and secure but also prepared for the latest cloud-native advancements. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products.. .  . . What we are looking for:. .  . . . 6+ years of professional experience in backend development, with deep expertise in C# and the .NET ecosystem (.NET 6/8/9).. . Advanced proficiency in building scalable Web APIs, including custom middleware, filter pipelines, and dependency injection.. . Mastery of Entity Framework Core, including performance tuning, migrations, and handling complex relational schemas in SQL Server.. . Solid experience with Azure services (or AWS equivalents), particularly in serverless functions, message queues (Service Bus), and containerization.. . Proven experience with Microservices, Domain-Driven Design (DDD), and event-driven architectures.. . A strong "test-first" mindset with experience in xUnit/nUnit and Moq for comprehensive unit and integration testing.. . Strong verbal and written English; comfortable leading technical discussions with cross-functional stakeholders.. . Time zone: CET (+/- 3 hours). We are unable to consider applications from candidates in other time zones.. . .  . . Nice-to-Have:. .  . . . Experience with Dapr or other microservices runtimes.. . Familiarity with NoSQL databases such as MongoDB or CosmosDB.. . Knowledge of Frontend frameworks (React or Angular) to facilitate better API contracts.. . Relevant Microsoft certifications (e.g., Azure Solutions Architect).. . .  . . Responsibilities:. .  . . . Architect and implement robust, maintainable, and testable backend services from scratch.. . Identify and resolve performance bottlenecks, optimizing memory usage and query execution times.. . Lead peer code reviews and establish coding standards to ensure long-term system health.. . Partner with Product Owners and Frontend Engineers to define technical requirements and API specifications.. . Work with DevOps to manage deployment pipelines and ensure smooth, zero-downtime releases.. . .  . . 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.