Internal Development Tools: Cost-saving framework, CDC replication slot, Event Sourcing Kubernates, GitBulk, Terraform Modules, BackstageDevOps, Infrastructure Stack : Java, Kotlin, Spring, EKS, GKE, AWS, GCP, Cloud Function, CDC, Kafka, Backstage, NodeJS, React, MongoDB

Integrated Twilio for phone verification and KYC decreased fraudulent account creation by 30%.Added a credit score provider and financing option, leading to 100-200 new customers per month.Developed the backend using Java, Spring, GraphQL, AWS, incorporating over 100+ microservices.

IT smartFlex Vodafone company Constructed a fault-tolerant infrastructure that sustained 2,000 TPS, enabling uninterrupted service and facilitating a 15% increase in user retention during high-traffic marketing campaigns and product launches.Built rate-limiting and caching system for SOAP services with NGINX Clojure and Redis, caching 40% requestsEngineered an ETL pipeline utilizing Java parallel streams and Kubernetes cron, Minio.Orchestrated the complete deployment cycle of applications from GitLab CI/CD to Helm in Kubernetes, ensuring seamless delivery and scalability.

Via SoftServeAdopted OAuth 2, which 20% of users preferred over the traditional method.Migrated parts of the application from WebObjects to Spring, decoupling it into independent services, cutting infrastructure costs by 30%, and allowing for scalable independence.Served as a junior mentor, providing guidance and support to team members, fostering skill development and collaboration.

Implemented support for free spins using ActiveMQ and Spring, leading to a 15% increase in user engagement and supporting 100,000 daily free spin requests.Integrated NetEnt game provider, allowing for 50 new games in the portfolio, contributing to a 25% boost in user retention.Facilitated KYC integration for user verification processes, reducing onboarding time by 30% and improving user verification accuracy by 20%.Enhanced and rewrote ETL processes with Apache Spark to ingest data from S3, resulting in a 60% increase in processing speed and enabling real-time analytics for 1 million events per day published to ClickHouse.Optimized data publishing to Ethereum by timing for low gas prices and encoding data, cutting costs by 50%, which translates to a $50k annual savings on transaction fees.Reduced page loading time from 6 seconds to 2 seconds by migrating the web-app from JSF to REST API, improving customer satisfaction by 40% and boosting conversion rates by 12%.