Emanuel-Cristian – Java, React, Next.js

It is a payment gateway features for a global payment processing platform, enabling secure transaction handling, integration with multiple payment methods, and reliable processing of online payments at scale.

• Developed and maintained backend features for large-scale payment processing systems, ensuring high performance, scalability, and security;
• Designed and implemented microservices to support critical business flows and improve system architecture;
• Enhanced and optimized existing systems to improve reliability and overall performance;
• Investigated and resolved production issues, performing root-cause analysis to prevent recurring incidents;
• Identified and resolved performance bottlenecks in high-load environments;
• Maintained engineering quality standards by writing unit, integration, and automated tests;
• Participated in code reviews to ensure code quality and best practices;
• Supported CI/CD pipelines to enable stable and efficient deployments;
• Delivered robust backend solutions in fast-paced, production-critical environments.

Multiple web-based platforms, including a 3D model rendering system, an offer portal, and backoffice tools for administration and order management. The project focused on enabling end-to-end business operations, from product visualization to order processing and internal workflow management.

• Delivered end-to-end full-stack features across backend and frontend, aligning technical implementation with business requirements;
• Designed system architecture and defined scalable, maintainable application structures with a focus on long-term performance;
• Developed and maintained backend services and frontend applications to ensure seamless user experience;
• Collaborated with stakeholders and engineering teams to translate requirements into robust technical solutions;
• Investigated and resolved complex cross-system issues, identifying root causes and implementing stable fixes;
• Implemented unit, integration, and end-to-end tests to ensure application stability and release quality;
• Led and supported SAP integrations, ensuring secure and reliable data exchange between enterprise systems;
• Contributed to technical leadership by making architecture decisions and improving overall system design.

An online service portal for managing equipment across multiple sites and logistics hubs. The platform supported spare parts ordering, warranty claim processing, customer communication, and site management, enabling efficient coordination of maintenance and operational workflows.

• Developed an online service portal for managing equipment across multiple sites and logistics hubs, including spare parts ordering, warranty claims, customer communication, and site management;
• Designed and implemented backend business logic, APIs, and scalable services supporting core operational workflows (approx. 70% backend focus);
• Contributed to frontend development by building user-facing features and improving overall platform usability (approx. 30% frontend focus);
• Investigated and resolved application issues across the stack, identifying root causes and delivering long-term fixes;
• Managed deployments and supported release processes, ensuring smooth and reliable rollouts across environments;
• Developed unit, integration, and end-to-end tests to ensure system reliability and production stability;
• Proposed code improvements, refactoring opportunities, and enhanced development practices to improve maintainability and performance;
• Delivered full-stack solutions with a focus on backend architecture, system reliability, and continuous product improvement.

A platform for managing European Union funding programs, enabling the administration of projects and calls for proposals across different countries. It supports end-to-end processes, including project submission, evaluation, and management, with workflows adapted to country-specific requirements.

• Contributed to the development of a platform for managing EU funds, projects, and country-specific calls for proposals;
• Developed end-to-end features across backend and frontend, including business logic, APIs, database interactions, and UI components;
• Translated complex business requirements into scalable and efficient technical solutions;
• Ensured system reliability by writing unit, integration, and end-to-end tests to reduce regressions and support stable releases;
• Integrated multiple external services and providers, handling APIs, authentication flows, and secure data exchange;
• Collaborated on building a scalable and user-friendly system supporting complex administrative and public sector processes;
• Delivered full-stack solutions across complex domain requirements, focusing on performance, reliability, and maintainability.