Recent Employment History

Backeng engineer at Shown.io 2019-present

• Introduced and implemented the backend foundation design based on hexagonal architecture.
• Mentored the team to follow TDD and Solid principles.
• Optimised data flows via Clickhouse and MySQL 8 NDB Cluster.
• Integrated with ad platforms (Bing, Google, Facebook etc.).

Backeng engineer at Foodkit.io 2018-2019

• Develop a scalable architecture with clearly set bounded contexts - payments, inventory, delivery, and so on.
• Mentored TDD-first workflow.
• Produced OpenAPI specification to validate implementation and build beautiful documentation.
• Integrated with payment gateways, delivery providers and POS systems.

CTO at Babystep Inc. 2015-2018

• Implemented internal CMS to manage thousands of video assets (education videos).
• Implemented production pipelines that compiled video assets to serve through various partner networks.
• Implemented Public API for our consumer mobile apps.
• Configured and maintained cloud infrastructure via Azure.

Open-Source

• lezhnev74/heaplog - Go, search engine for log files
• lezhnev74/inverted_index - Go, disk-resident inverted index.
• lezhnev74/window-spec - Go, a language to define time windows.
• lezhnev74/go-iterators - Go, a set of iterators.
• thephpleague/openapi-psr7-validator - Php, the most popular OpenAPI validator in the Php ecosystem.
• lezhnev74/ema - Php, an app to quickly post and search text notes.
• lezhnev74/pasvl - Php, like regular expressions but for PHP arrays.