Sergey Yarlov

Senior Software Engineer

Chainstack•  July 2019 - Present

There are no formatting available. It's better to look my linkedin profile. ======================================================================================= * Implemented support of blockchain protocols (Hyperledger Fabric, Tezos, Avalanche) what include actions across the whole project architecture: ............................................................................................................................................................................................ - created and built new blockchain nodes images (Docker) ............................................................................................................................................................................................ - wrote and deployed helm charts (k8s, Helm, GCP, AWS, Azure, Virtuozzo) ............................................................................................................................................................................................ - designed and implemented RESTful APIs for multiple services (DRF, Pydantic, Dramatiq, Redis, MySQL) ............................................................................................................................................................................................ - customized and implemented snapshotting mechanism for new blockchain protocols (Python, Golang) ............................................................................................................................................................................................ - covered each component with tests (unittest, pytest, doctests, codecov). ======================================================================================= * Refactored billing wrapper for Stripe (using DRF) ======================================================================================= * Implemented microservice as k8s operator for monitoring statuses of deployments. Replaced longpolling by events which allowed to react on incidents faster (Python, Kopf, k8s) ======================================================================================= * Improved CI\CD (pipelines in CircleCI became faster up to 2x times) ======================================================================================= * Wrote API wrappers for manage cloud resources for GCE, Openstack (DRF) ======================================================================================= * Implemented new API for generation reports of usages of resources by customers (DRF, FastAPI, Influx) ======================================================================================= * Created helper tools to automate maintenance operations. It made manual operations 10x faster (Bash, Python) ======================================================================================= A lot of other stuff across the stack from backend to cluster