papajuan

Micro-Betting in Sports | Go, Java, Kafka, RabbitMQ, gRPC, PostgreSQL, Redis, MongoDB, GCP, Bitbucket - Built and scaled backend infrastructure from scratch, enabling growth from startup to mid-sized business using Kafka, RabbitMQ, and gRPC. - Cut GCP costs by 60% through system performance optimization. - Led technical onboarding for partners, boosting transaction volume and market reach. - Created Java and Go SDKs, reducing partner integration time by 80% (from months to under a week). - Set engineering standards with SOLID principles, reducing tech debt and improving code scalability. - Hired and mentored the backend team, building a high-performing, business-aligned engineering culture.

Projects: 1. Fanaply.com – NFT Marketplace: Media, Web3 | Java, Scala, Play Framework, PostgreSQL, Redis, AWS, Bitbucket - Integrated Ethereum and Polygon smart contracts to power NFT minting and transactions. - Implemented dynamic meta tag preloading, enhancing SEO and boosting brand visibility across platforms. - Refactored and optimized system architecture to support high-concurrency traffic and floating load demands, ensuring scalability and reliability under rapid growth. 2. JoinNotch.com – Platform Connecting Referees and Sports Teams: Sports | Java, Spring, PostgreSQL, Redis, AWS, GitHub - Architected and developed the entire backend from the ground up, taking the product from idea to production within 6 months. - Integrated Stripe and Plaid payment gateways to automate transactions, reducing friction and increasing user adoption by streamlining the payment experience for teams and referees. 3. MrBlackApp.com – Global CMS for the Hospitality Industry: Hospitality | Java, Scala, Play Framework, PostgreSQL, Redis, AWS, Bitbucket - Integrated multiple international payment gateways (Stripe, PayPal, Square, Circle, Nuvei), allowing seamless onboarding of global partners and improving monetization flexibility. - Developed integrations with leading POS systems (Omnivore, LightSpeed, Aloha), significantly expanding platform capabilities and enabling new subscription-based offerings.

Education | Java, Spring, SQL Server, JavaFX, Swing, JQuery, Dojo, SVN, Jenkins, RabbitMQ - Contributed to the development and maintenance of multiple internal software solutions supporting university operations. - Enhanced system performance and code reliability through refactoring and modernization of legacy components. - Led the migration to newer versions of key frameworks and libraries, ensuring long-term maintainability and compatibility.