Harold T.-Senior Software Developer | OOP . Full Stack . Web & Mobile . Cloud-Native

• Planned and developed a CPU monitoring application for monitoring system performance and resource utilization.
• Designed and implemented a Spring Boot backend providing a REST API for processing and exposing monitoring data.
• Developed the React frontend for presenting monitoring information in a clear and user-friendly interface.
• Integrated PostgreSQL for persistent storage and management of application data.
• Containerized the application and its services using Docker Compose.
• Automated infrastructure provisioning and deployment using Terraform on AWS.
• Structured the application as a modern, maintainable system using REST-based communication between frontend and backend.
• Designed and developed a secure, scalable CPU monitoring architecture (cpu-watcher) with a dedicated collector application that streams monitoring data to the backend, reducing direct exposure of system resources.
• Designed a secure cloud infrastructure with the database isolated within a private network and OIDC-based authentication.
• Implemented Infrastructure as Code with Terraform and integrated version-controlled CI/CD pipelines to automate testing, infrastructure changes, and application deployments.
• Designed and implemented the frontend delivery architecture using AWS CloudFront.

Stack: Spring Boot · React · PostgreSQL · REST API · Docker Compose · Terraform · AWS

• Designed and developed SimpleAI, a B2B cloud-native AI automation platform for AI-based customer service using a RAG architecture.
• Designed and developed a secure and scalable CPU monitoring web application (cpu-watcher) with a dedicated collector application for streaming monitoring data to the backend.
• Contributed to the design, development, and release of Main Events, a modern event platform consisting of a mobile application and associated websites.
• Contributed to the design, development, and publishing of SEUYTEL React.js websites.
• Configured and administered a GDPR-compliant on-premises cloud infrastructure for SEUYTEL.
• Contributed to the technical and organizational administration of the company.

• Performed reverse engineering of a legacy enterprise software system and migrated an existing Microsoft Access database to PostgreSQL, including analysis, transfer, and adaptation of the data structures.
• Designed and developed a backend system using Laravel and a React-based frontend.
• Implemented SSO authentication based on a SAP smart card.
• Developed and worked in a controlled corporate environment handling sensitive business and personal data in compliance with applicable data protection, IT security, and compliance requirements, including GDPR.
• Independently handled reverse engineering, development, documentation, and technical coordination tasks.

• Independently planned and developed a native Android application using Kotlin and the MVVM architecture.
• Designed and implemented the application user interface and core functionality.
• Developed a php-based backend providing REST API services.
• Integrated the Android application with the backend for data exchange and processing.
• Implemented and managed the MySQL database for persistent application data.
• Used Git for version control and structured software development workflows.
• Took responsibility for the technical implementation across the mobile application, backend, and database components.

Stack: Kotlin · Android · MVVM · php · REST API · MySQL · Git

• Provided first- and second-level customer support via phone and email.
• Analyzed and resolved technical inquiries and escalated complex issues to the appropriate departments.
• Contributed to the rollout of newly developed software in a seven-person Scrum team.
• Performed testing and evaluated the software from an end-user perspective.
• Collected, documented, and systematically communicated customer feedback and improvement suggestions to the development team, specialist departments, and external customers.
• Worked in a regulated insurance environment, handling personal customer data in accordance with applicable data protection and security requirements.