Senior Big Data – Hadoop Developer

Citi

Applications Development Intermediate Programmer Analyst contributing to system enhancements and programming solutions in collaboration with the Technology team. Requires 5-8 years of experience with Hadoop and Oracle.

Posted 7/10/2026full-timeChennai • 🇮🇳 IndiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in Hadoop and its core components, with a strong focus on data warehousing using Hive and real-time querying with Impala. Possesses solid analytical and problem-solving skills, along with the ability to communicate complex technical concepts effectively to diverse audiences.

Highest-signal resume keywords

Hadoop ExpertiseHive Data WarehousingImpala Real-Time QueryingOracle SQL Performance OptimizationData Ingestion with Sqoop

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

HadoopHiveImpalaOracle SQLPL/SQLSqoopQuery TuningPerformance OptimizationDebuggingData Analysis

Soft Skills

Analytical SkillsProblem-SolvingCommunication Skills

Industry Keywords

Data WarehousingData IngestionDatabase ArchitectureBackup/RecoverySecurity Concepts

Tech Stack

Tools & technologies

HadoopOracleRDBMSSQL

About the role

Key responsibilities & impact

Utilize knowledge of applications development procedures and concepts, and basic knowledge of other technical areas to identify and define necessary system enhancements, including using script tools and analyzing/interpreting code.
Consult with users, clients, and other technology groups on issues, and recommend programming solutions, install, and support customer exposure systems.
Apply fundamental knowledge of programming languages for design specifications.
Analyze applications to identify vulnerabilities and security issues, as well as conduct testing and debugging.
Serve as advisor or coach to new or lower level analysts.
Identify problems, analyze information, and make evaluative judgements to recommend and implement solutions.
Resolve issues by identifying and selecting solutions through the applications of acquired technical experience and guided by precedents.
Has the ability to operate with a limited level of direct supervision. Can exercise independence of judgement and autonomy.

Requirements

What you’ll need

5-8 years of Demonstrable experience with Hadoop and its core components.
Expertise in Hive for data warehousing and query processing.
Experience with Impala for real-time querying of data in Hadoop.
Solid understanding of data ingestion tools like Sqoop for RDBMS-to-Hadoop data transfer.
Extensive experience with Oracle SQL, PL/SQL, views, packages, and stored procedures.
Proven ability in Oracle query tuning, performance optimization, and index management.
Familiarity with Oracle database architecture, backup/recovery, and security concepts.
Excellent analytical, problem-solving, and debugging skills with a keen eye for detail.
Strong verbal and written communication skills, with the ability to explain complex technical concepts to non-technical stakeholders.
Bachelor’s degree/University degree or equivalent experience.

Benefits

Comp & perks

Citi is an equal opportunity employer,
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.