Senior Java Tech Lead — Big Data & Spark Architect

Citigroup Inc. in Mississauga, Canada is seeking a Senior Java Engineer/Tech Lead to design, develop, and optimize distributed data applications and backend services.

You will build scalable data pipelines with Java, Spark, and Hadoop ecosystem tools, and lead technical design discussions with data engineers and architects. The role requires hands-on expertise in big data technologies, cloud platforms, and performance tuning to deliver enterprise-scale solutions.