Marino – React, Typescript, Node.js

The platform behind the first Latin partner dance studio in Tartu.

• Built and maintained systems for online sales, scheduling, customer management, access control, and marketing automation running on AWS with multiple API integrations and a React Native app.
• Migrated the platform gradually from custom PHP/MySQL to Java and Spring Boot with no downtime, keeping both stacks running side by side throughout the transition.
• Built the hardware integration layer in Python, translating application-level actions into commands for networked access-control and lighting controllers.
• Built a production MCP server with about 100 tools using Node.js and Typescript.
• Built an agent fleet that read email, CRM, and analytics data daily, proposed actions, and executed them only with explicit approval.
• Built a deterministic evaluation harness that scored decisions against ground truth.
• Served as the sole architect and engineer of the entire system in daily production use.

Romania’s #1 beauty booking platform used by 430K+ customers and 11,000+ specialists.

• Developed and maintained both the customer-facing React Native app for iOS and Android and the salon management app.
• Implemented native functionality in Kotlin and Swift.
• Worked closely with the backend team to define API contracts upfront, allowing frontend and backend development to move forward in parallel with fewer dependencies.
• Built a new internal admin platform from the ground up using Next.js and Typescript.
• Worked across the full Mero product ecosystem.

A US-regulated real-money iGaming platform serving 1M+ monthly active users across five regulated states.

• Worked across web and mobile applications using Typescript and React.
• Implemented jurisdiction-specific compliance requirements across about 15 US states and three LATAM countries.
• Delivered careful validation for market-specific rules where incorrect implementation could become a regulatory issue.

Developed and launched three React Native applications for parking, food delivery, and car rental.

• Developed and launched three React Native applications for parking, food delivery, and car rental.
• Took each application through production release on both the App Store and Google Play.
• Developed and maintained standalone native applications in Kotlin for Android and Swift for iOS.
• Led a team of five engineers, owning product delivery end to end and working directly with clients on requirements and priorities.
• Managed the team’s performance process, including regular 1:1s and review cycles.

An NFC-based emergency information system. Paramedics and users could share critical emergency information by tapping an NFC smartphone against a wristband or other accessory.

• Built an NFC-based solution in Java that let paramedics and users share critical emergency information by tapping an NFC smartphone against a wristband or other accessory.