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Alston Peter Nankeril Shibu

@alstonpeternankerils

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Data Engineer II at EY who cut billing runs by 78% and built a reconciliation pipeline achieving 99% match.

United Kingdom

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What I'm looking for

I'm based in India and open to relocating to the UK or the Netherlands with visa sponsorship.

At Ernst and Young (EY), I engineered Databricks and PySpark billing pipelines that cut processing time by 78%, and rebate runs by 69%. I also built a reusable reconciliation pipeline that validated a Synapse-to-Unity Catalog migration with 99% match.

I designed a config-driven Medallion pipeline serving 100+ entities, with SCD Type 2, idempotent loads, and configuration-based onboarding. My star-schema models helped move reporting from a 2–4 business day turnaround to self-service.

At IBS Software Pvt. Ltd., I worked on data engineering for British Airways and Emirates Airlines migrations, including onsite dry runs at British Airways HQ in London. I also built pipelines using Prefect, pandas, AWS, and PostgreSQL, and mentored 2 fresher engineers.

Experience

Work history, roles, and key accomplishments

Current

Data Engineer II

Current

Ernst and Young (EY)

Dec 2025 - Present (11 months)

Engineered ETL pipelines for billing and rebate on Databricks PySpark, cutting run times by 78% and 69%. Designed config-driven Medallion ELT pipelines and reconciliation frameworks, and automated CI/CD deployments.

Databricks PySpark SQL ADF Medallion Architecture SCD2 Data Reconciliation Azure DevOps GitHub Actions ARM Templates CI CD Unit Testing Performance Testing

Senior Solution Engineer - Data Engineering

IBS Software Pvt. Ltd.

Jul 2025 - Dec 2025 (5 months)

Authored Oracle SQL and PL/SQL scripts for UI content changes across 19+ hotel and resort clients. Created a Business Requirement Document template reused across client onboardings.

Oracle SQL Pl SQL Data Migration Business Requirements APS Rosetta

Solution Engineer - Data Engineering

IBS Software Pvt. Ltd.

Jul 2023 - Jul 2025 (2 years)

Led onsite stakeholder meetings at British Airways HQ, London, achieving 99.9% accuracy in migration dry runs. Engineered Prefect pipelines processing ~40GB of data and automated validation for Emirates Airlines' loyalty migration.