Ioana-Demetra – Java, Spring Boot, Python

A large-scale payment processing platform handling secure transaction integrations for enterprise clients.

• Architected and led a Google project involving three parties, integrating a third-party encryption service with scalable, event-driven Kafka communication.
• Designed a resilience strategy that enabled event persistence and guaranteed processing during core-service outages, preventing data loss.
• Delivered a critical Microsoft feature and integrated it into a distributed production system.
• Led teams and projects, coordinating delivery, making technical decisions, and maintaining high-quality outcomes.
• Initiated the migration of a legacy monolith to a scalable, cloud-native architecture.
• Led the payment-service migration using Helm, Jenkins, Kafka, Groovy, Kubernetes, AWS, and GKOP.
• Resolved complex production issues, minimized downtime, and contributed to technical interviews and team development.

AI systems powering Discord and Telegram bots for an AI-driven SocialFi platform focused on genuine Web3 community growth.

• Led the design and development of scalable data processing solutions, ensuring efficient handling of data for future use.
• Designed and developed 5 microservices that communicated via Kafka to prepare data for the AI network.
• Architected the solution using a microservices approach, integrating Flask and REST APIs for creating and managing endpoints.
• Worked with Docker and Docker Compose to containerise the microservices and deploy them on AWS.
• Utilized data analytics to organize and prepare data for future AI systems.

Digital banking software.

• Developed and integrated frontend and backend features for a digital banking application.
• Implemented and tested REST API services on Android.
• Developed bank payment formats and PL/SQL automation scripts to improve efficiency and compliance.
• Strengthened application security through OWASP-aligned assessments, dependency analysis, secure code reviews, and SonarQube scanning.
• Built automated tests using JUnit, Mockito, and Selenium, supplemented by manual testing where needed.
• Produced UML-based technical documentation and presented solution designs to stakeholders.
• Acted as Backup Scrum Master, providing technical guidance, estimates, delivery coordination, and onboarding support; delivered three major projects.

A European-scale project focused on secure digital identity solutions, working within systems supporting biometric identification and secure authentication for government and public sector clients.

• Owned and enhanced three key project tools, including encryption development for a core tool.
• Developed frontend and backend features for an internal microservices-based application.
• Built AI-driven fingerprint and face-generation solutions using neural networks and StyleGAN2.
• Containerized TensorFlow GPU JupyterLab for model execution and migrated code from TensorFlow 1 to TensorFlow 2.
• Led AI knowledge sharing, guided new team members, and shaped technical approaches and tool behavior.
• Maintained code quality through reviews, test automation with JUnit, manual testing, code coverage, and remediation of SonarQube, OWASP, and Checkmarx findings.
• Supported delivery planning in Jira, resolved critical blockers, and implemented features to meet deadlines.

In-house products developed from concept through to prototyping and production for a technology company focused on innovative consumer and embedded solutions.

• Developed an interface with Vue.js for the company's web application.
• Tested the functionality and usability of the company's web application.
• Informed developers about bugs and issues using technical descriptions.
• Wrote new automation test code based on requirements and existing test cases with Python and Selenium.
• Performed code maintenance for older failed tests.
• Analyzed the Java tests first.