Delta One Data Engineer: Alt Data Pipelines & Research

Susquehanna International Group, LLP; Lower Merion Township (Montgomery County); On-site; USD 120,000 - 190,000; Full time

Job summary

Susquehanna International Group, LLP seeks a Data Engineer to join the Systematic Delta One desk. You will design scalable data pipelines converting vendor and alternative data into research-ready, time-correct datasets powering alpha research and signal development.

You will ingest and normalize data at scale, build end-to-end onboarding, handle restatements, and apply LLM-assisted tooling to extract structure from unstructured vendor materials.

Qualifications

• 5+ years of experience building Python data applications and pipelines over large historical datasets.
• Experience ingesting and normalizing third-party data at scale (batch feeds over S3/SFTP, data shares, APIs).
• Strong SQL and familiarity with Parquet, Arrow, DuckDB or similar tooling; NumPy/Pandas/Polars experience.
• Sound data modeling, data accuracy, and reproducible research workflows; interest in temporal/versioned data.
• Experience operating production data pipelines: monitoring, backfill, restatement handling.

Responsibilities

• Own end-to-end onboarding of new vendor and alternative datasets from evaluation to ingestion to production monitoring.
• Build point-in-time datasets with as-delivered history and handle restatements and backfills for accurate backtesting.
• Design entity-mapping and reference datasets linking vendor identifiers to tradable instruments.
• Extend the platform beyond tabular feeds using LLMs and agentic tooling for onboarding and data quality workflows.
• Run data-quality and vendor-evaluation studies to inform trials and licensing decisions.
• Create research-ready datasets optimized for large-scale historical analysis and backtesting.
• Improve ingestion platform and tooling to accelerate onboarding of new datasets.

Skills

Python data pipelines

SQL

Pandas/NumPy/Polars

Data modeling

Versioned data

LLMs in data

Education

Advanced degree in CS/Math/Physics

Tools

Parquet

Arrow

DuckDB

Snowflake

AWS S3

REST APIs

Job description

Susquehanna International Group, LLP seeks a Data Engineer to join the Systematic Delta One desk. You will design scalable data pipelines converting vendor and alternative data into research-ready, time-correct datasets powering alpha research and signal development.

You will ingest and normalize data at scale, build end-to-end onboarding, handle restatements, and apply LLM-assisted tooling to extract structure from unstructured vendor materials.