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(1222) Senior Backend C# Engineer

Nearsure

Salary not specified
Sep 15, 2025
Remote, US
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Modernizing core systems by re-engineering legacy synchronous workflows into highly concurrent, thread-safe architectures that drive superior performance and scalability.

Requirements

  • 5+ Years of experience working with C-Sharp.
  • 3+ Years of experience working with SQL.
  • 3+ Years of experience working with AWS.
  • 3+ Years of experience working with Apache Spark.
  • Strong understanding of threading models, synchronization primitives, and concurrency debugging.
  • Proven experience in performance tuning and application profiling for large-scale systems.

Responsibilities

  • Lead the design and development of highly concurrent, multi-threaded applications in C-Sharp.
  • Re-architect legacy synchronous workflows into scalable, thread-safe solutions.
  • 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, including staging and transformations.
  • 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.

Other

  • Advanced English Level is required for this role, as you will work with US clients.
  • Bachelor's Degree in Computer Science, Engineering, or a related field.