Jeffin Devasia
Mumbai
Summary
Lead Data Engineer with 8+ years’ experience designing scalable data platforms across travel, telecom, and consulting domains. Expert in building cloud-native ETL/ELT pipelines (GCP, Snowflake, dbt, Airflow, Spark/Kafka), data modeling, and real-time analytics. Proven track record of leading teams, migrating legacy systems to modern data lakehouse architectures, and delivering cost savings through performance optimization. Certified Google Cloud Data Engineer. Currently on a valid Australian visa with full working rights, available for relocation
Overview
8
8
years of professional experience
1
1
Certification
Work History
Senior Data Engineer -> Lead Data Engineer
Jet2 Travel Technologies Pvt Ltd, India
India
11.2022 - Current
- Engineered and scaled a DataFlex template for MyJet2 integrating Google Pub/Sub, DataFlow, and Terraform.
- Followed Kimball methodology to design dimensional models for Voice call and Chat data, enhancing customer sentiment analysis and extracting customer intent insights.
- Migrated Marketing Database to Snowflake using DBT & Airflow, reducing query costs by 25% and improving reporting performance by 30%. Used StreamLit and SnowSQL for Reference data management
- Acted as Team Lead, facilitating (AGILE)scrum ceremonies and mentoring the team on complex tasks.
- Designed a solution for ingesting Webhook data via GCP Cloud Function Gen2 with Cloud Armor and Load Balancer using Terraform (IaC).
Senior Data Engineer -> Associate Technical Architect
Quantiphi Analytics Solutions Pvt Ltd, India
India
06.2021 - 11.2022
- Designed and built a robust solution architecture to ingest open-source Covid-19 data using GCP services.
- Redesigned Inhouse SalesOps Ecosystem at Quantiphi using BigQuery, building ingestion and analytics pipelines from multiple source systems.
- Led a team of 4 to design time-series ingestion pipelines on GCP (BigQuery), enabling predictive battery health analytics and reducing data latency from hours to minutes.
- Spearheaded migration of client ETL infrastructure from Teradata to BigQuery in GCP Cloud, enhancing performance and reducing overhead costs.
Senior Data Engineer
Reliance Jio Infocomm Pvt Ltd, Mumbai, India
Mumbai, India
10.2019 - 06.2021
- Developed real-time streaming ETL pipelines (Spark, Kafka, Hive) handling millions of daily network events, enabling proactive outage detection and reducing downtime by 15%.
- Developed multiple real-time streaming ETL pipelines on Hadoop: Spark - Kafka - Hive framework to improve customer experience.
Big Data Developer
L&T Infotech Pvt Ltd, India
India
09.2017 - 09.2019
- Implemented an integrated BI Solution on Azure Cloud to perform ETL and aggregations on large volumes of data.
- Worked on a full-scale migration of SSIS ETL architecture to Hadoop Spark-Hive framework, reducing process latency significantly.
- Designed and implemented a Data Ingestion Framework using Spark-Scala for Treasury data analysis at ABSA Bank.
Education
BE - Computer Science
Mumbai University
05.2017
Skills
- Programming and Scripting: - Python, Java, Scala, SQL, HiveQL, UNIX Shell Scripting
- Data Engineering: - DBT, Hadoop, Spark, Kafka, Sqoop, SQL Server, NiFi
- Cloud Platforms: - Google Cloud (Dataflow, BQ, Cloud Functions, Composer, Cloud Run, GCP workflow)
- Databases: - Snowflake, BigQuery, MySQL, HIVE, PostgreSQL
- Geospatial Information System Platforms: - QGIS, ArcGIS, Geonode, BlenderGIS
- BI Tools: - Tableau
- Orchestration and Scheduling: - Oozie, Cron-Scheduler
Certification
- Certified Google Cloud Professional Data Engineer (2021)
- IKM Oracle10g - PL/SQL Programming Certified
Timeline
Senior Data Engineer -> Lead Data Engineer
Jet2 Travel Technologies Pvt Ltd, India
11.2022 - Current
Senior Data Engineer -> Associate Technical Architect
Quantiphi Analytics Solutions Pvt Ltd, India
06.2021 - 11.2022
Senior Data Engineer
Reliance Jio Infocomm Pvt Ltd, Mumbai, India
10.2019 - 06.2021
Big Data Developer
L&T Infotech Pvt Ltd, India
09.2017 - 09.2019
BE - Computer Science
Mumbai University