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I am a full-stack developer with over three years of experience specializing in building secure and high-performance applications using Node.js, Vue.js, and TypeScript for blockchain, metaverse, and telematics platforms. I have architected scalable backend systems using AWS services like Lambda, Step Functions, and AppSync, enabling real-time automation and data processing across distributed infrastructures. I take pride in integrating secure multi-tenant authentication systems, leveraging Terraform for scalable infrastructure deployments, and migrating legacy workflows to TypeScript-based unified codebases to improve code maintainability and reliability. My experience spans cloud infrastructure automation, backend API design, and developing internal tools to simplify complex blockchain operations for non-technical stakeholders.…I am a full-stack developer with over three years of experience specializing in building secure and high-performance applications using Node.js, Vue.js, and TypeScript for blockchain, metaverse, and telematics platforms. I have architected scalable backend systems using AWS services like Lambda, Step Functions, and AppSync, enabling real-time automation and data processing across distributed infrastructures. I take pride in integrating secure multi-tenant authentication systems, leveraging Terraform for scalable infrastructure deployments, and migrating legacy workflows to TypeScript-based unified codebases to improve code maintainability and reliability. My experience spans cloud infrastructure automation, backend API design, and developing internal tools to simplify complex blockchain operations for non-technical stakeholders.

Iona Tan Dumea

Full Stack Developer, Back-End Developer, Blockchain Developer, +2

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I am a full-stack developer with over three years of experience specializing in building secure and high-performance applications using Node.js, Vue.js, and TypeScript for blockchain, metaverse, and telematics platforms. I have architected scalable backend systems using AWS services like Lambda, Step Functions, and AppSync, enabling real-time automation and data processing across distributed infrastructures. I take pride in integrating secure multi-tenant authentication systems, leveraging Terraform for scalable infrastructure deployments, and migrating legacy workflows to TypeScript-based unified codebases to improve code maintainability and reliability. My experience spans cloud infrastructure automation, backend API design, and developing internal tools to simplify complex blockchain operations for non-technical stakeholders.…I am a full-stack developer with over three years of experience specializing in building secure and high-performance applications using Node.js, Vue.js, and TypeScript for blockchain, metaverse, and telematics platforms. I have architected scalable backend systems using AWS services like Lambda, Step Functions, and AppSync, enabling real-time automation and data processing across distributed infrastructures. I take pride in integrating secure multi-tenant authentication systems, leveraging Terraform for scalable infrastructure deployments, and migrating legacy workflows to TypeScript-based unified codebases to improve code maintainability and reliability. My experience spans cloud infrastructure automation, backend API design, and developing internal tools to simplify complex blockchain operations for non-technical stakeholders.

Available to hire

I am a full-stack developer with over three years of experience specializing in building secure and high-performance applications using Node.js, Vue.js, and TypeScript for blockchain, metaverse, and telematics platforms. I have architected scalable backend systems using AWS services like Lambda, Step Functions, and AppSync, enabling real-time automation and data processing across distributed infrastructures.

I take pride in integrating secure multi-tenant authentication systems, leveraging Terraform for scalable infrastructure deployments, and migrating legacy workflows to TypeScript-based unified codebases to improve code maintainability and reliability. My experience spans cloud infrastructure automation, backend API design, and developing internal tools to simplify complex blockchain operations for non-technical stakeholders.

Skills

Experience Level

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Work Experience

Remote Full Stack Developer at The Sandbox

July 1, 2024 - Present

Led development of event-driven workflows using AWS Lambda, Step Functions, and real-time listeners to synchronize database and frontend updates dynamically. Integrated Slack notifications to deliver real-time operational insights improving team awareness and incident response. Secured frontend authentication by integrating Keycloak using Authorization Code Flow with PKCE to prevent authorization code interception attacks. Developed internal blockchain operation tools such as batch minting directly to user wallets for non-technical stakeholders. Protected GraphQL and HTTP APIs with custom AWS Lambda authorizers validating tokens against Keycloak's authorization server implemented fully with Terraform for scalable, repeatable infrastructure as code. Migrated legacy automation workflows from Python and shell scripts into a unified TypeScript codebase, streamlining maintenance and improving developer experience with comprehensive unit tests.

Backend Developer at Tracknamic Romania

July 1, 2024 - August 5, 2025

Developed and maintained internal APIs to facilitate communication between various systems and streamline data exchange processes. Automated workflows and built internal tools with Windmill, increasing operational efficiency. Managed deployment of web services on the cloud using Docker, Docker Compose, Docker Swarm, and Portainer, ensuring consistent performance and reliability. Established separate development and production environments, ensuring seamless integration and testing of new features while maintaining live system stability. Utilized Redis for caching and implemented a pub/sub system for WebSocket communication. Developed strong system administration skills with extensive Linux experience. Implemented comprehensive unit tests with Jest to ensure high code quality and reliability. Created detailed documentation of processes and tools, streamlining workflows and improving team efficiency. Conducted thorough pull request reviews to maintain code quality and adherence to best p