Senior Data Engineer · Cloud Architect

ANKUR ROY

Architecting the Data-Driven Future

7+ years engineering petabyte-scale data platforms on GCP · Azure · AWS · Databricks · Snowflake — turning raw event streams into competitive intelligence at warp speed.

Explore My Work Get In Touch

Years XP

10+TB

Live Pipelines

₹2Cr+

Cost Savings

Certifications

SCROLL

// 01 PROFILE

The Engineer Behind the Data

I'm a Certified Google Professional Cloud Architect and Microsoft Azure Data Engineer & Data Scientist with deep expertise in building systems that move fast, scale effortlessly, and cost less.

From founding a Flutter startup to leading data engineering teams at Walmart, Delhivery, and Infosys, I've architected everything from real-time HTAP platforms to ML-driven business verification systems.

I thrive at the intersection of distributed systems, cloud-native architecture, and business impact — turning messy raw data into competitive advantage.

GCP Cloud Architect Azure Data Scientist (DP-100) Azure Data Engineer (DP-203) Advanced DS — IBM ISRO Geospatial

Data Engineer 3

Walmart Global Tech

// 02 MISSION LOG

Experience Timeline

Data Engineer 3 Walmart Aug 2023 – Present

Team Lead — Managing a 5-member India data engineering team for Walmart Business.
Pay By Invoice — Architected a TreviPay-integrated real-time credit, invoicing & reconciliation platform for B2B transactions.
Site Pop-up — Built a config-driven attribution engine with Spring Boot + Redis + ML models triggering behavior-driven UI pop-ups from in-session signals.
Sales Tech — Curated data facets for 6M+ Accounts & Contacts powering Salesforce with Spark + BigQuery for precise targeting.
Business Verification — Designed NiFi + ML entity-resolution pipeline achieving 32% improved accuracy and <50 s latency.

Senior Data Engineer Delhivery Jan 2022 – Aug 2023

Real-Time Data Mart — Directed design of 92 real-time marts at 25+ TB scale with Kafka, Spark Streaming & TiDB HTAP at 8K+ write / 3K+ read QPS.
DB Migration — Migrated 20+ TB across 92 marts from Aurora PostgreSQL → TiDB HTAP for 14 teams.
Data Lake Migration — Moved 45+ TB Hudi → Delta Lake on Databricks, cutting batch time by 43%.
Cost Optimisation — Achieved 75% Spark savings (~₹1.5 Cr) via CPU slicing on YARN.

Data Engineer Infosys Nov 2020 – Jan 2022

Led team of 4 engineers for Kraft Heinz delivering scalable data solutions.
Indirect Tax Datamart — Snowflake datamart transforming 80M+ orders, 100K+ products with international SAP HANA taxation rules.
Data Integration — ETL with Azure Data Factory → Databricks + DBT → Snowflake for enterprise analytics.

Founder & Product Engineering Lead Startup Jun 2019 – Oct 2020

Founded and led a cross-platform mobile app venture using Flutter with a team of 6.
Designed scalable apps with MVVM architecture, RESTful APIs & Firebase services.
Managed full product lifecycle — client discovery to successful delivery.

// 04 TECH STACK

Skills & Expertise

Languages

PythonScala SQLJavaBash

Data Platforms

DatabricksApache Spark FlinkKafka NiFiDelta Lake HivePresto SnowflakeDBT

Databases

TiDB (HTAP)BigQuery PostgreSQLMySQLRedis

Cloud & Infrastructure

GCPAzureAWS KubernetesDocker TerraformAirflowYARN

Monitoring & Observability

GrafanaPrometheus

Core Expertise

Data ModelingETL / ELT Data WarehousingGovernance Data QualityCost Optimization ML Integration

// 05 RECOGNITION

Achievements & Awards

Winner — Walmart Business Hackathon 2025

Topped the internal hackathon, demonstrating innovation in business data engineering.

Innovation Badge — Walmart Global Tech India

Honored for outstanding contributions to data platform innovation.

Speaker — Databricks Bangalore User Group

Presented at the Databricks community, sharing expertise on real-time data platforms.

First Runner-up — GenAI Hackathon, Google India & Delhivery

Secured 2nd place in a competitive Generative AI challenge.

Above and Beyond Award — Delhivery

Recognized for exceptional performance migrating real-time data platforms at scale.

Winner — Azure-a-thon by Infosys

Won the Azure cloud challenge organized by Infosys Limited.

Speaker — Flutter Meetup, Google Gurugram

Presented at Android Developer Club's Flutter event hosted at Google Gurugram.

Rank 31 — DUET 2020, MS Computer Science

Also secured Rank 50 in MCA — Delhi University Entrance Test 2020.