• Design and build systems that power audiobook ingestion, transformation, and delivery — ensuring performance, accuracy, and scalability across millions of titles. • Contribute across the stack, from backend services and APIs to lightweight interfaces or operational tools, depending on the team’s evolving needs. • Collaborate with engineers, PMs, and designers to translate sophisticated workflows into elegant, maintainable, and reliable systems. • Be responsible for your impact — take operational responsibility for the services you build and drive continuous improvement in reliability and performance. • Adapt and T-shape: Step into areas beyond your comfort zone (e.g., data pipelines, internal tooling, or deployment infrastructure) as the mission evolves. • Author and review RFCs, sharing your insights and shaping technical decisions that affect the broader Audiobooks ecosystem. • Embrace the Audiobooks Mission expectations: operate with “short toes,” take ownership beyond team boundaries, and value pragmatic, reversible decisions. • Mentor and collaborate with peers, sharing knowledge and contributing to an inclusive, psychologically safe engineering culture.

• Design and develop backend services, primarily using Kotlin • Build scalable backend services in Kotlin and Java • Collaborate closely with product and engineering teammates • Contribute to architecture and technical decisions • Write clean, maintainable, production-quality code • Continuously improve existing systems • Learn from and share knowledge with a highly experienced team

• Design, develop, and maintain scalable and high-performance backend systems using .NET technologies • Contribute to system architecture decisions and lead the design of microservices-based solutions • Build and maintain RESTful APIs and ensure high availability and performance • Collaborate with cross-functional teams including product, design, and QA to deliver high-quality solutions • Ensure code quality through code reviews, best practices, and clean code principles • Write and maintain unit and integration tests • Troubleshoot, debug, and optimize existing systems • Participate in CI/CD processes and support deployment activities • Mentor junior developers and contribute to team knowledge sharing • Stay up to date with emerging technologies and industry best practices

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.