Dmitriy Apolonov

Spearheaded modernization of Zalando's e-commerce platform with React, Next.js, and Svelte, delivering a 35% increase in user engagement. Built scalable GraphQL/Elasticsearch search architecture reducing search latency by 50% and boosting product discoverability. Integrated secure payment flows and GDPR-compliant customer data handling using JWT, Auth0, and encryption libraries. Automated CI/CD pipelines with GitHub Actions and Kubernetes, enabling daily production releases with near-zero downtime. Designed and implemented observability stack (Prometheus, Grafana, Datadog) for real-time monitoring. Partnered with product teams to implement personalized recommendation engines, increasing conversion by 15%. Mentored 6 junior engineers, introduced coding standards, and organized weekly architectural review sessions.

Designed a microservices migration roadmap for client onboarding, reducing onboarding time by 40%. Built REST/GraphQL APIs handling 500K+ daily transactions across multiple regions. Strengthened security posture by integrating OAuth2.0 and SAML, reducing unauthorized access by 95%. Implemented automated A/B testing pipelines for real-time feature validation and data-driven decisions. Re-architected data ingestion pipelines with Spark Streaming and Kafka, handling billions of daily music events. Worked with Data Science teams to deploy personalized playlist recommendation services into production. Mentored cross-functional squads on cloud-native best practices, contributing to Spotify’s global engineering guild.

Developed cloud-native monitoring dashboards using Angular, .NET Core, and SQL Server. Led frontend modernization from AngularJS to Angular 11, achieving 25% higher accessibility scores. Championed database optimization projects in T-SQL, reducing query time by 40%. Built fraud detection dashboards integrating AI/ML APIs, reducing fraudulent transactions by 20%. Migrated services to AWS Lambda and Kubernetes, reducing hosting costs by 30%. Mentored 4 junior engineers and led code review sessions. Redesigned booking flows with UX researchers, improving checkout completion rates by 12%.