In my previous role, I worked extensively on integrating various systems, including CRM, ERP, and custom-built applications. I utilized APIs, middleware, and ETL tools to ensure seamless data flow and synchronization. For instance, I integrated a Salesforce CRM with an Oracle ERP system, enabling real-time data exchange and improving operational efficiency. My approach always involves thorough planning, testing, and documentation to ensure reliability and scalability.

Data transformation and mapping are critical in system integration. I typically use tools like Informatica or custom scripts to map data fields between systems. For example, I once transformed XML data from a legacy system into JSON format for a modern RESTful API. I ensure data integrity by validating inputs and outputs, and I often create detailed mapping documents to guide the process and facilitate future maintenance.

Security is paramount in system integration. I implement encryption for data in transit and at rest, use secure authentication methods like OAuth, and ensure compliance with industry standards such as GDPR and HIPAA. For example, I integrated a healthcare system where I used SSL/TLS for secure communication and implemented role-based access control to protect sensitive patient data. Regular security audits and penetration testing are also part of my strategy to maintain robust security.

When troubleshooting integration issues, I start by analyzing logs and error messages to pinpoint the problem. I use tools like Postman for API testing and Wireshark for network analysis. For instance, I once resolved a latency issue by optimizing database queries and adjusting API rate limits. I also collaborate with cross-functional teams to understand the context and ensure a comprehensive solution. Continuous monitoring and proactive maintenance help prevent recurring issues.

One challenging project involved integrating a legacy mainframe system with a cloud-based SaaS platform. The mainframe used outdated protocols, so I developed a custom middleware layer to bridge the gap. I also faced data consistency issues, which I resolved by implementing a reconciliation process. Despite tight deadlines, I delivered the project on time by prioritizing tasks and leveraging agile methodologies. This experience honed my problem-solving skills and reinforced the importance of adaptability in system integration.