Senior Software Engineer – C# ID55642

AgileEngine is an Inc. 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.

WHY JOIN US

If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

About The Role

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.

What You Will Do

• 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;
• 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.

MUST HAVES

• 4+ years of experience as a software engineer;
• Expert-level proficiency in C# with experience in multi-threaded and parallel processing;
• Understanding of C++;
• Strong understanding of threading models, synchronization primitives, and concurrency debugging;
• Proven experience in performance tuning and application profiling for large-scale systems;
• Advanced proficiency in SQL;
• Proven experience deploying solutions on AWS;
• Strong problem-solving and debugging skills focused on scalability and reliability;
• Upper-intermediate English level.

NICE TO HAVES

• Hands-on experience with Apache Spark;
• Experience in re-engineering legacy systems into modern architectures;
• Familiarity with microservices design principles and cloud-native development patterns;
• Strong communication and collaboration skills with cross-functional teams.

Perks And Benefits

• Professional growth: Mentorship, TechTalks, and personalized growth roadmaps.
• Competitive compensation: USD-based pay with education, fitness, and team activity budgets.
• Exciting projects: Modern solutions with Fortune 500 and top product companies.
• Flextime: Flexible schedule with remote and office options.