Senior Software Language Engineer – Python

Job Title

Senior Software Language Engineer – Python

CT / NY (Hybrid) – onsite 2 days per week in CT location

Hedge Fund / Systematic Trading / Advanced Platform Engineering

NOT A CONTRACT ROLE. YOU MUST BE IN A FULL TIME ROLE CURRENTLY (NO CONTRACTORS).

A leading systematic hedge fund is seeking a Senior Software Language Engineer (Python) to help shape the firm’s Python-based research and execution platform.

This is a hands‑on, deeply technical role (90% coding) focused on evolving the Python runtime, performance, and data infrastructure that power large‑scale quantitative research and algorithmic trading systems.

You’ll be part of a small, world‑class engineering team building the platform layer, not applications — designing, optimizing, and extending Python to support cutting‑edge modeling, simulation, and execution pipelines used by researchers and data scientists across the firm.

• Architect and evolve the firm’s Python ecosystem for research and execution — from runtime optimization to distributed data frameworks.
• Write and optimize thousands of lines of production‑grade, performance‑critical Python code.
• Collaborate directly with quantitative researchers and data scientists to translate mathematical logic into highly performant systems.
• Mentor and guide other senior engineers on advanced Python design patterns, performance tuning, and ecosystem best practices.
• Integrate and extend modern Python frameworks (Num Py, Pandas, PyArrow, Polars, PyTorch, etc.) for scalable analytics and compute.
• Continuously improve research throughput and trading performance through data‑driven engineering enhancements.

Operate with the autonomy and speed of a startup, within the rigor and scale of a top hedge fund.

Collaborate with some of the most advanced minds in quantitative research and distributed computing.

Your work directly impacts trading performance, research velocity, and platform evolution.

• No telecommuting
• No Agencies Please

What We’re Looking For

• 5‑10 years of professional software development experience in high‑performance or data‑intensive systems (finance, trading, or high‑growth startups).
• Expert‑level Python engineer — understand internals (GIL, C‑extensions, async I/O, memory profiling) and write optimized, clean, reliable code.
• Ability to produce highly optimized Python code for performance‑critical functions.
• Familiarity with the Python data science ecosystem.
• Highly analytical mindset and understanding of how programming languages can express macroeconomic mathematical logic.
• Strong background in computer science, mathematics, or quantitative fields.
• Deep familiarity with the Python data‑science and compute ecosystem.
• Experience designing or extending programming languages, compilers, or DSLs – a major plus.
• Highly analytical mindset – fluent in algorithms, systems design, and mathematical reasoning.
• Track record of building core platforms, SDKs, or frameworks, not just applications.
• A degree in Mathematics or Computer Science.

From a leveling perspective: this role aligns to an L5 / E5 engineer at FAANG‑caliber companies — highly senior, deeply hands‑on, and operating at a staff‑level technical depth without management responsibilities.

One of the top hedge funds in the world.

• Contact
  :
  Ross Freeman
• E‑mail contact
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• Web
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