Senior PySpark Developer

Citibank (Switzerland) AG; Pune District; On-site; Confidential; Full time

Job summary

Citi is seeking an Applications Development Senior Programmer Analyst to participate in building and refining complex software systems. You will work with the Technology team to analyze business needs, develop and test applications, and support live environments.

This intermediate role requires in-depth knowledge of big data tools and programming in Spark/PySpark. The ideal candidate has 5–8 years of relevant experience, a strong background in systems analysis and project delivery, and a

Qualifications

• 5-8 years of relevant experience in applications development.
• Experience in systems analysis and programming of software applications.
• Experience in managing and implementing successful projects.
• Knowledge of consulting/project management techniques/methods.
• Ability to work under pressure and meet deadlines.
• Bachelor’s degree or equivalent experience.
• In-depth understanding of HDFS architecture, data storage and fault tolerance.
• Experience with HDFS, YARN, MapReduce, Spark, and related ecosystems.

Responsibilities

• Conduct feasibility studies, time and cost estimates, IT planning, risk assessment, applications development, modeling, and establish and implement new or revised applications to meet business needs.
• Monitor and control all phases of the development process including design, construction, testing, and implementation; provide user and operational support.
• Leverage knowledge of applications development to analyze problems and propose advanced programming solutions; advise users and teams as SME.
• Ensure procedures and standards are followed; assess risk and escalate issues with transparency.
• Collaborate with users and technology groups to deliver secure, scalable solutions and guide junior analysts.

Skills

Systems analysis

Software programming

Project management

Under pressure

Business process evaluation

Education

Bachelor's degree / University degree or equivalent experience

Tools

HDFS

YARN

MapReduce

Spark Core

Spark SQL

Spark Streaming

Spark GraphX

PySpark

Pandas

NumPy

HBase

Cassandra

MongoDB

SQL

Zookeeper

Job description

The Applications Development Senior Programmer Analyst is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities.

Responsibilities

Conduct tasks related to feasibility studies, time and cost estimates, IT planning, risk technology, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users Utilize in-depth specialty knowledge of applications development to analyze complex problems/issues, provide evaluation of business process, system process, and industry standards, and make evaluative judgement Recommend and develop security measures in post implementation analysis of business usage to ensure successful system design and functionality Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems Ensure essential procedures are followed and help define operating standards and processes Serve as advisor or coach to new or lower level analysts Has the ability to operate with a limited level of direct supervision. Can exercise independence of judgement and autonomy. Acts as SME to senior stakeholders and /or other team members. Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Qualifications

• 5-8 years of relevant experience
• Experience in systems analysis and programming of software applications
• Experience in managing and implementing successful projects
• Working knowledge of consulting/project management techniques/methods
• Ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements
• Education: Bachelor’s degree/University degree or equivalent experience
• In-depth understanding of HDFS architecture, data storage, and fault tolerance mechanisms
• Experience with HDFS commands and administration
• Solid understanding of YARN resource management and job scheduling
• Fundamental understanding of MapReduce programming paradigm, even if primary development is in Spark/Flink
• Knowledge of Zookeeper for distributed coordination services
• Strong proficiency in Spark Core, Spark SQL, Spark Streaming, and Spark GraphX (beneficial).
• Expert-level programming skills in Python and Pyspark, specifically for developing Spark applications
• Experience with Spark performance optimization techniques (e.g., caching, partitioning, shuffle optimizations, memory management).
• Experience with PySpark for data processing.
• Familiarity with data manipulation libraries (Pandas, NumPy).
• Scripting for automation and data orchestration.
• Complex query writing, subqueries, window functions, and performance tuning.
• HBase (for real-time access to large datasets within Hadoop).
• Cassandra, MongoDB, or similar.
• Familiarity with RDBMS concepts and SQL for data integration.
• Understanding of dimensional modeling, fact and dimension tables, star/snowflake schemas.

Other job-related duties may be assigned as required.

Job Family Group: Technology

Job Family: Applications Development

Time Type: Full time

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi’s EEO Policy Statement and the Know Your Rights poster.