Senior Software Developer, C#, AWS

MAS Global Consulting

full-time

Posted on: 9/13/2025

Origin: • 🇺🇸 United States

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Senior

ApacheAWSCloudMicroservicesSparkSQL

About the role

Lead the design and development of highly concurrent, multi-threaded applications in C#
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
Collaborate with cross-functional teams to define technical requirements, align architecture with business goals, and deliver high-quality solutions

Seasoned Full Stack Engineer with advanced expertise in C# and modern software architecture
Expert-level proficiency in C#
Hands-on experience in multi-threaded and parallel processing
Deep understanding of threading models, synchronization primitives, and concurrency debugging
Proven experience in performance tuning and application profiling for large-scale systems
Advanced SQL skills, including query design, optimization, and handling large-scale data operations
Hands-on experience with Apache Spark for distributed data processing
Experience deploying solutions on AWS with focus on reliability, scalability, and cost efficiency
Exceptional problem-solving and debugging skills
Experience modernizing legacy systems into scalable architectures (nice to have)
Familiarity with microservices and cloud-native development patterns (nice to have)
Strong communication and collaboration skills, experience working in cross-functional teams (nice to have)