Senior Java Big Data Developer

Cognizant
CA - Ontario - ON-199 Bay Street
May 16, 2025
Engineering

We are seeking a highly skilled and experienced Senior Java Developer with Big Data expertise to join our AIA team in Toronto.
The ideal candidate will have a strong background in designing, developing, and optimizing high-performance applications in both Java and Big Data environments.
This role demands a deep understanding of Java, Big Data technologies, and cloud migration, along with the ability to provide technical leadership and drive innovation.

We are Cognizant Artificial Intelligence:

Digital technologies, including analytics and AI, give companies a once-in-a-generation opportunity to perform orders of magnitude better than ever before.
However, clients need new business models built from analyzing customers and business operations at every angle to really understand them.
With the power to apply artificial intelligence and data science to business decisions via enterprise data management solutions, we help leading companies prototype, refine, validate, and scale the most desirable products and delivery models to enterprise scale within weeks.

In this role, you will:

Design, develop, and maintain scalable and high-performance backend applications using Java, Microservices, and Spring/Spring Boot.
Develop, and optimize Big Data applications using Java/Scala and Spark on Cloudera/HDP.
Develop Spark code using Scala and Spark SQL/Streaming for faster testing and processing of data.
Create scalable and reliable systems for managing large amounts of data.
Led Spark API over Cloudera Hadoop YARN to perform analytics on data in Hive.
Developed analytical components using Scala, Spark and Spark Stream.
Involved in converting MapReduce programs into Spark transformations using Spark RDD's on Scala.
Develop Spark scripts by using Scala Shell commands as per the requirement.
Develop Apache Spark/SparkSQL scripts and HIVE scripts to process the HDFS data.
Utilize Jenkins CI and Git for continuous integration and continuous delivery (CI/CD) pipelines.
Apply strong problem-solving skills, object-oriented programming (OOP) principles, and knowledge of data structures and algorithms to develop efficient and robust software solutions.
Provide technical leadership, mentorship, and guidance to junior developers.

What you'll need to succeed (required skills):

Strong background in problem solving, OOP, data structures and algorithms.
Must have 8+ years backend application development experience in Java ,Microservices and Spring/Spring Boot
Must have 3+ years in developing and optimizing Big Data applications using Java/Scala and Spark on Cloudera/HDP.
Experience in developing/designing micro-service architecture.
Experience in building end to end data pipelines on AWS/Azure and/or Databricks
Proven hands-on experience in containerization - Docker, Kubernetes, Openshift etc.
Working knowledge of Jenkins CI, Git, CI/CD pipelines
Ability to work with multiple stakeholders - business and technical

What will help you stand out (preferred skills):

Experience in large scale on-premise to Cloud migration projects.
Programming experience in Python (2+ years).

At Cognizant, we're eager to meet people who believe in our mission and can make an impact in various ways.
We strongly encourage you to apply even if you only meet the required skills listed.
Consider what transferrable experience and skills make you a unique applicant and help us see how you'd be beneficial to this role.

Cognizant will only consider applicants for this position who are legally authorized to work in Canada without requiring employer sponsorship, now or at any time in the future.

Working Arrangements:

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible.
Based on this role's business requirements, this is a hybrid position requiring 3 days a week in a Cognizant or client office in Toronto.
Regardless of your working arrangement, we are here to support a healthy work-life balance through our various well-being programs.

Note:
The working arrangements for this role are accurate as of the date of posting.
This may change based on the project you're engaged in, as well as business and client requirements.
Rest assured; we will always be clear about role expectations.

Read the full job description and apply online on the recuiter's web-site

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