Python SQL ORM Data Pipeline

Led a 4-person engineering team building a Python SQLAlchemy pipeline that automated financial data ingestion, validation, and storage — delivering clean, queryable data at scale.

Python SQL ORM Data Pipeline

Technologies Used

Python SQLAlchemy SQL PostgreSQL RESTful APIs

Key Features

ORM-based ingestion layer with schema validation at every stage
Automated retry logic and dead-letter handling for failed records
Led 4-developer team from design through production deployment
Modular adapter pattern supporting multiple financial data sources
Full test coverage on transformation and validation logic

Project Overview

Root Labs needed a robust internal data pipeline that could ingest financial data from multiple sources, validate it against a known schema, and store it in a queryable format — without relying on costly third-party vendors. I led a team of four engineers to design and build this system from scratch.

Technical Implementation

The pipeline was built in Python using SQLAlchemy as the ORM layer, connecting to a PostgreSQL database. Each data source was wrapped in a standardized adapter that normalized incoming payloads before they hit the validation layer. Validation checked for schema conformance, value ranges, and referential integrity — failed records were routed to a dead-letter queue for review rather than silently dropped.

The architecture was designed to be modular from day one: adding a new data source meant implementing one adapter class, not touching the core pipeline. This made it straightforward to onboard new providers as the business grew.

Team & Outcome

I owned the architecture and led the team through design, implementation, and deployment. The pipeline became the backbone of Root Labs’ internal data infrastructure — reliable, testable, and maintainable by the full team.

Completed on: Jan 1, 2025
Christopher A. Rotunno Grounded in Analytics

Data analytics engineer and BI leader. Building pipelines, models, and dashboards that turn raw data into clear decisions.

Copyright 2026 Christopher A. Rotunno. All Rights Reserved

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