A Big Data Engineer develops, maintains, tests, and evaluates big data solutions within organizations. They design and implement large-scale data processing systems, convert complex data and findings into understandable tables, graphs, and written reports. They also ensure architecture supports business requirements. Their role involves selecting and integrating Big Data tools and frameworks, implementing ETL processes, and monitoring performance. They collaborate with data scientists and architects on several projects, ensuring effective data management. They use technologies like Hadoop, Spark, and NoSQL databases. They also ensure systems meet industry practices for data security.