Yehor Kanunnikov

Senior Full-Stack Engineer

Harvey AI

Eliminated production transaction-safety violations and reduced endpoint latency from 1.5s to 50ms. Built context-selection and pinning features, closed security gaps, and developed LLM routing and evaluation systems.

PythonSQLAlchemyFlaskPostgreSQLRedisReactTypeScriptStatsigDatadogTemporalOpenAI APIAnthropic APIPrompt CachingLLMSecurityOpenAPIAlembicKeyset Pagination

Full-Stack Engineer

Delivered 9 products over 14 months, each owned solo from scoping to production. Built billing systems with idempotent payment webhooks, a car listings aggregator, and various platforms including course, clinic, and gym management.

PythonFlaskPostgreSQLRedisDBTMetabasePayment IntegrationWebhooksScrapingSQLAlchemyCeleryDockerAWS

Full-Stack Engineer

Sole developer of the brand's e-commerce site with ~300-SKU catalog, payment-integrated checkout, and customer accounts, serving ~2,000 customers per month.

PythonFlaskPostgreSQLRedisEcommercePayment IntegrationWeb Development