Michal Czech Email & Phone Number

• Designed database schemas and architecture for multiple containerized backend services with RESTful APIs and later worked on their implementation (Nest.js, MySQL, PostgreSQL, MongoDB, Redis, Docker) • Designed and implemented serverless workflows (e.g., image and video transcoding, image transformations) in AWS (Lambda, Batch, Step Functions, Event Bridge)• Planned and developed an ecosystem involving a custom npm library, Cloudflare workers, Cloudflare R2, and Nest.js API for the electron-based cross-platform desktop game launcher that allowed for: - encoding and decoding files in custom binary file format - differential patching of game files and patch generation using Courgette - file integrity validation based on checksums - validation of downloaded files using RSA signatures - decompression and decryption of files with LZMA and AES• Designed and implemented backend integration with Stripe which included customized handling of recurring and one-time payments and extended coupon logic• Managed services running on AWS (ECS, AppRunner, Lambda, EC2, DocumentDB, RDS) with Terraform and Packer• Designed new HA infrastructure based on AWS ECS for services previously running on AWS Apprunner• Implemented location-based caching solution using Redis