Senior C# Developer Remoto

5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

As a Senior Backend Engineer , you will design and optimize high-performance, multi-threaded systems, transforming legacy workflows into scalable, thread-safe architectures. Leveraging deep expertise in C#, SQL, and AWS, you’ll drive concurrency improvements, enhance system throughput, and support large-scale data processing with technologies like Apache Spark. This role offers strong technical ownership and the opportunity to shape reliable, high-impact backend systems in complex environments.

Lead the design and development of highly concurrent, multi-threaded applications in C#;

Apply advanced knowledge of threading models, synchronization primitives, and performance tuning to optimize system throughput and minimize contention;

Design, develop, and optimize complex SQL queries, stored procedures, and large-scale data operations;

Utilize Apache Spark for distributed data processing at scale;

Deploy and manage solutions on AWS, ensuring reliability, scalability, and cost efficiency;

Diagnose and resolve concurrency issues, perform application profiling, and drive continuous improvements in system performance;

Collaborate with cross-functional teams to define technical requirements, align architecture with business goals, and deliver high-quality solutions.

4+ years of experience as a software engineer;

• Expert-level proficiency in C# with experience in multi-threaded and parallel processing;
• Understanding of C++ ;
• Proven experience in performance tuning and application profiling for large-scale systems;
• Advanced proficiency in SQL ;
• Proven experience deploying solutions on AWS ;
• Hands-on experience with Apache Spark;

Familiarity with microservices design principles and cloud-native development patterns;

USD-based pay with education, fitness, and team activity budgets.

Exciting projects: Flexible schedule with remote and office options.

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