Agileengine is an inc. * 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 usif 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 roleas asenior 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 dolead 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 haves4+ years of experienceas a software engineer;expert-level proficiency in c#with experience in multi-threaded and parallel processing;understanding ofc++;strong understanding ofthreading models, synchronization primitives, and concurrency debugging;proven experience inperformance tuning and application profilingfor large-scale systems;advanced proficiency insql;proven experience deploying solutions onaws;strongproblem-solving and debugging skillsfocused on scalability and reliability;nice to haveshands-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 benefitsprofessional 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.#j-*-ljbffr