Denis Dyrbalov Email and Phone Number

Built and deployed a reliable payment service on GCP (Cloud Run, GKE) in 2 weeks, integrated with Stripe for seamless payments.Created and deployed a configuration server on GCP in 2 weeks, improving debugging and error resolution. Evaluated via Jira task monitoring.Collaborated with architects to develop a microservices architecture using C4 methodology, enhancing store performance. Measured with JMeter, integration testing, and Grafana.Built an onboarding system for backend developers, including documentation and guides, accelerating training and reducing Slack questions.Conducted interviews and led the recruitment of Backend, PM, and DevOps developers, strengthening team capabilities.Created an ERD for a Postgres database with 100+ tables, improving error detection and query performance. Evaluated with JMeter, integration testing, and Grafana.Led the backend department for 2 months, deploying critical services (Cart, Payment, BFF, Kafka) on GCP (Cloud Run, GKE).Crafted Kubernetes manifests in a week, integrating Keycloak, SQL Postgres GCP, and Vault On-premise. Enhanced deployment performance verified by JMeter, integration tests, and Grafana.

Crafted a personalized running plan algorithm, reducing sports consultant expenses by 30% and boosting subscription revenue by 25%. Evaluated via client satisfaction surveys, uptake metrics, and revenue analysis.Devised a shoe condition tracking algorithm, decreasing running injuries by 15% and increasing app revenue by 10%. Measured through injury reports, app revenue data, and user feedback.Engineered microservices using the C4 methodology, enhancing online store performance by 40% and capacity by 20%, leading to a 30% increase in daily transactions. Assessed using JMeter testing, capacity metrics, and user satisfaction surveys.Formulated a Postgres database ERD with over 50 tables, reducing query time by 50% and bug-fixing time by 25%. Validated via JMeter benchmarks and Jira statistics.Developed Kubernetes manifests for critical services, reducing deployment time by 60% and cutting infrastructure costs by 15%. Evaluated through CI/CD pipeline metrics and client feedback.Implemented GitHub Actions CI/CD pipelines, increasing deployment frequency by 40% and enhancing service reliability by 20%. Measured using deployment frequency metrics and client satisfaction surveys.Orchestrated the timely delivery of an MVP with a 90% client approval rating. Evaluated through client approval ratings and project delivery timelines.Launched Grafana, Zipkin, and Prometheus on GCP, reducing incident response time by 50% and boosting uptime by 25%. Measured through incident response metrics and uptime monitoring tools.Configured ArgoCD and Image Updater, increasing deployment frequency by 50% and minimizing disruptions by 30%. Assessed using deployment data and client reviews.Integrated Google Secrets in the CI/CD pipeline, reducing environment-related issue resolution time by 40% and accelerating feature delivery by 20%. Measured via operational metrics and developer efficiency.

Created and put into effect a Tax Code verification system that assesses applicants' financial capacity, guaranteeing a more equitable allocation of funds to those who require assistance. This system enhanced the effectiveness of distributing aid, boosting precision and fairness by 20% based on a comparison before and after implementation.Implemented a role-based access control and authentication system, meticulously delineating permissions for individual users and offering adaptable management of their activities. This initiative not only bolstered data security but also streamlined application administration, resulting in a 30% decrease in unauthorized access incidents, as evidenced by administrator surveys and log analysis.Configured AWS S3 with file encryption and CORS settings, integrating them to securely store documents in different formats, enhancing data reliability and confidentiality. This improved the document submission and processing for aid distribution. Surveys conducted with administrators and clients showed a 30% decrease in document access time, resulting in faster application processing.Incorporated form submission and modification capabilities into the administrator interface, thereby streamlining data collection. This enhancement expedited the acquisition of vital information for submissions to diverse organizations, enhancing the efficacy of securing financial assistance. Analysis revealed a 40% decrease in application review duration due to improved processing speeds.