Nilashis Halder

As a Data Analyst with three years of experience, I approach complex challenges with a logical and pragmatic mindset, dedicated to extracting precise, actionable insights. My ambition drives me to continuously master new techniques, ensuring accountability and strategic impact in every data-driven decision.

Experience

Data Analyst

Cozeva · Oct 2025 – Present

Not yet confirmed

• • Product Analytics: Transform large-scale SaaS product logs to build usage, engagement, churn, and adoption analytics.
• • Other Metrics: Visualize ROI, Impact, Client Healthscore, NLP accuracy etc. stats using Amazon QuickSight, supporting client retention, sales enablement, Gap closure and executive decision-making.
• • Cloud & Automation: Develop SQL & Python-based data pipelines processing 100+ GB datasets, optimizing storage, efficiency and query cost on AWS, orchestrated using Airflow.

A

Data Analyst

Applied Research Works – Cozeva · Oct 2025 – Present

Not yet confirmed

• Work with large-scale SaaS datasets to perform complex data processing and aggregations in Python, optimizing for AWS overhead efficiency, storage, and query cost.
• Manage data pipelines using MySQL and Amazon S3 as primary data sources, with GitHub for script version control, creating lightweight flat files for improved performance and scalability.
• Develop interactive dashboards in AWS QuickSight (Quicksuite) for internal C-level stakeholders and product-embedded analytics.

D

Business Intelligence Analyst

Diebold Nixdorf · Feb 2024 – Oct 2025

Not yet confirmed

• Developed auto-jobs, reports & dashboards using Power BI, SQL Server, Excel, Visio for global stakeholders to retrieve insights on organization's operational KPIs that help them improve business & decision making.
• Ensured consistency & accuracy of product master data which directly contributes to company's services revenue, services operations and other various downstream services like analytics etc.
• Automated non-standard tasks and standardized billed-work analysis project adding more accuracy, boosting efficiency by 70% reducing additional headcount requirements for overall process.

Analyst - Data Research & Resolution

Cognizant · May 2021 – Nov 2023

Not yet confirmed

• Worked here as an Offshore Analyst for a US based Real Estate data company(client) to support their onshore Data Research & Resolution team that handles L3 data quality issues, changes & problems.
• Researched data issues reported by internal teams or external clients, implemented manual or systematic fixes at database level and presented back remediation plan with detailed issue summary and RCA report.
• Maintained 99% accuracy with 110% productivity & zero client escalations throughout my tenure.