Maksim Zhuravkov

• Designing and developing components of the SQL runtime for Apache Ignite 3/GridGain Platform, including SQL parser, optimizer, and distributed query execution runtime. • Designing the architecture for the type inference system, significantly increasing query flexibility and execution coverage. • Optimized performance by implementing partition-pruning, reducing query time and system load. • Implemented memory quotas and spillover-to-disk mechanisms, minimizing risks of out-of-memory errors.

• Architected and implemented a new in-house payment infrastructure, successfully migrated payment systems (including card solutions) to in-house services. • Launched and maintained migration project for e-commerce payments, replacing vendor solutions. • Designed and built automation tools for the QA team using open-source libraries, enabling efficient end-to-end testing and reducing dependency on external vendors. • Developed monitoring and support tools for the production support team.

Project 1 – Back-end services migration to AWS for a mobile applications company Migrated back-end services from on-premises infrastructure to AWS, improving scalability and reliability. Project 2 – Migration to cloud solution for a marketing agency Migrated the company’s advertising platform from a Hadoop-based data warehouse to a cloud solution. Project 3 – Payment Gateway development for E-Commerce Developed and enhanced a payment gateway, ensuring secure and reliable transaction processing.

• Designed and implemented core back-end services, including ETL subsystems and payment provider integrations. • Developed and maintained back-end services for multiple web applications within the company. • Reduced application downtime during deployments by implementing high-availability strategies. • Increased development speed and reduced regression risks through automated testing. • Improved system stability and release efficiency by introducing DevOps practices.

• Developed core back-end services on Java. • Implemented strategies to minimise application downtime during deployment phases. • Developed comprehensive integration and system test suites.