Davit Khachatryan

I’m a Backend Engineer with 3+ years building production microservices and serverless systems on AWS. I specialize in Node.js/NestJS API design, performance tuning, and scalable cloud architecture that holds up under real traffic.

At Codeex, I architect and ship Node.js backend services in a serverless/microservices ecosystem, helping run production workloads with 99.9%+ uptime. I provision AWS infrastructure (Lambda, S3, RDS, EC2), containerize services with Docker to reduce deployment issues, and design CI/CD pipelines in Bitbucket to enable same-day deployments.

At Evistep, I designed and built scalable REST APIs and microservices with NestJS and Express.js supporting 50.000+ users. I audited ORM-generated SQL, rewrote critical paths in raw SQL, and reduced average query execution time by 30% for high-traffic endpoints.

I also enjoy owning end-to-end integration work when needed—implementing AWS Cognito auth/authorization, connecting S3 for storage, and using event-driven patterns with SNS. Recently, I built and optimized a high-throughput web scraping pipeline with Puppeteer/Playwright/Cheerio and improved reporting performance by tuning indexing and caching.