Koushik Sarkar

Data Engineering Portfolio

Hi, I am

Koushik Sarkar

I build as

Experienced in ETL design and development, SQL tuning, shell scripting, and end-to-end delivery of enterprise data workflows.

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ETL / ELT Design SQL Performance Shell Scripting

Current Focus

Reliable pipelines, thoughtful design, and maintainable delivery.

Business-aware ETL

Translate requirements into dependable mapping, session, and workflow logic.

Performance tuning

Improve execution efficiency by resolving source, mapping, session, and target bottlenecks.

Platform versatility

Comfortable across databases, scripting, and modern engineering tools that support production delivery.

About Me

A grounded engineering profile shaped by enterprise delivery, database thinking, and a strong bias toward dependable execution.

I'm

An experienced Data Engineer working extensively on ETL design and development, shell scripting, and SQL. I have end-to-end exposure to analyzing business requirements, building solutions, testing, and deploying ETL processes with Informatica PowerCenter.

Strength

Turning complex workflow requirements into structured, maintainable delivery.

Approach

Balance technical depth with clarity, performance, and business alignment.

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Forte

Core areas where design discipline, problem solving, and delivery experience come together.

ETL Designing

Design and develop complex ETL and ELT logic with attention to clarity, resilience, and maintainability.

Performance Tuning

Identify bottlenecks across sessions, mappings, sources, and targets to improve throughput and stability.

Logic and Database Design

Build structured program logic and robust database solutions that support scalable downstream use.

Skills

Education, delivery experience, and technical breadth centered on enterprise data engineering.

Education, Skills and Experience

University of Calcutta (University College of Science, Technology and Agriculture / Rajabazar Science College) is my alma mater. I completed an MSc in Computer Science. My interests include Data Engineering, Database Management Systems, Data Structures and Algorithms, and Programming Logic. I am currently working as an Informatica ETL Developer at Deloitte and formerly worked as a Systems Engineer at Tata Consultancy Services Ltd.

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What stands out

Strong hands-on ETL delivery paired with SQL depth, scripting ability, and familiarity with diverse databases and supporting tools.

Informatica PowerCenter Client (9.x, 10.x) 85%

ETL Design, SQL, Unix Shell Scripting, DBMS, Data Warehouse 85%

Oracle, PostgreSQL, MySQL, Git, GitLab 80%

Java, C/C++, Python, Kafka, DSA 80%

HTML5, CSS3, JavaScript 75%

SAP Hana, SAP BODS, Qlik Sense 65%