Susquehanna International Group

Python Developer- Quant Core Data | Experienced Hire

Susquehanna International Group • $90K — $130K *
Bala Cynwyd, PA 19004In-Person
Finance & Insurance
Less than 5 years of experience
Today
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Job Overview by Ladders

Qualifications

  • PhD or postdoc in a quantitative field (Math, Physics, Statistics, etc.) graduating by Summer 2026
  • Experience with high-performance Python and code optimization techniques
  • Strong data analysis skills using Python libraries for large datasets
  • Attention to detail with a focus on data cleanliness and correctness
  • Ability to translate ambiguous research needs into solid engineering solutions

Responsibilities

  • Translate mathematical trading logic into high-performance, optimized code
  • Build and maintain backtesting systems for strategy simulation
  • Design and scale historical data frameworks for efficiency
  • Create internal tools for analyzing and visualizing large datasets
  • Develop packages for expert researchers to enhance signal generation technology

Benefits

  • Opportunities for professional development and mentorship
  • Collaborative work environment with a focus on innovation
  • Access to cutting-edge technologies and tools
  • Impactful role in shaping trading behavior and strategies
  • Flexibility in work hours to enhance work-life balance
Full Job Description
Overview
Overview

Join our Quant Core Data team to translate mathematical trading logic into high-performance code, and build and scale the data and backtesting infrastructure used by quantitative researchers and strategists. Our team produces data for studies to steadily improve trading behavior and strategies.

In this role, you will:
  • Translate mathematical trading logic into high-performance, optimized code
  • Build and maintain backtesting systems that simulate strategy behavior in production
  • Design and scale our historical data framework for efficiency and robustness
  • Build internal tools to create, analyze, and visualize large datasets
  • Build packages used by expert researchers to evolve our signal generation technology
What we’re looking for
  • PhD (graduating by Summer 2026) or postdoc in a quantitative field (e.g., Math, Physics, Statistics, EE, CS, Operations Research, Economics)
  • Experience writing high-performance Python (Cython, pybind11, numba, or similar) and optimizing hot code paths
  • Strong Python data analysis skills (polars/pandas) for large datasets
  • Enthusiasm for data at scale, with strong attention to cleanliness and correctness
  • Comfort translating ambiguous research requirements into robust engineering solutions

About Susquehanna International Group

Susquehanna International Group is a global quantitative trading firm that was founded in 1987. The company specializes in trading options, futures, equities, and other securities. It has offices in North America, Europe, and Asia and employs over 2,500 people. The company is known for its innovative trading strategies and advanced technology. It is also involved in venture capital and private equity investments.
Learn more about Susquehanna International Group
Size
2,500 employees
Industry
Finance & Insurance
Founded
1987
* Ladders Estimates

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