Senior Software Developer- Python

Company Overview

Interactive Brokers Group, Inc. (Nasdaq: IBKR) is a global financial services company headquartered in Greenwich, CT, USA, with offices in over 15 countries. We have been at the forefront of financial innovation for over four decades, known for our cutting‑edge technology and client commitment.

IBKR affiliates provide global electronic brokerage services around the clock on stocks, options, futures, currencies, bonds, and funds to clients in over 200 countries and territories. We serve individual investors and institutions, including financial advisors, hedge funds and introducing brokers. Our advanced technology, competitive pricing, and global market help our clients to make the most of their investments.

Barron’s has recognized Interactive Brokers as the #1 online broker for six consecutive years. Join our dynamic, multi‑national team and be a part of a company that simplifies and enhances financial opportunities using state‑of‑the‑art technology.

This is a hybrid role (3 days in the office / 2 days remote).

The Financial Crimes Surveillance team develops and maintains sophisticated systems that detect and prevent fraud, market manipulation, and money laundering across Interactive Brokers’ global platform. In this role, you’ll architect, implement, optimise, and maintain large‑scale data pipelines and surveillance models that process massive volumes of financial data. The team consists of software engineers, data engineers, compliance specialists and data scientists working on mission‑critical infrastructure that directly protects the integrity of the financial system.

• Process 1+ billion order events and 6+ million trades daily
• Protect 4.5+ million client accounts
• Direct impact on financial security and regulatory compliance

• Design, optimise, and extend transaction surveillance and data‑pipeline processes to enhance system efficiency, reliability and scalability
• Navigate seamlessly between strategic, system‑level architecture and function‑level implementation details of our surveillance system, which orchestrates 150+ processes
• Optimise data architectures and databases for maximum performance and reliability
• Build developer tooling to accelerate development workflows and system monitoring
• Ensure data accuracy, security and compliance with regulatory standards

• Take ownership of projects and sub‑systems from planning through resolution, making impactful decisions on complex technical and business‑related questions
• Collaborate effectively with quantitative engineers, surveillance model developers and compliance stakeholders to translate complex business requirements into scalable designs and processes
• Identify project bottlenecks, risks and limitations; calculate costs; and provide strategic insights to stakeholders
• Transform high‑level surveillance concepts into production‑ready processes that deliver actionable insights

• Own and curate dozens of mission‑critical datasets that drive surveillance operations
• Design, build and automate robust data pipelines to support real‑time and batch processing
• Develop advanced data quality frameworks to proactively identify issues before they impact operations

• Contribute to the evolution of coding standards and internal code review processes
• Drive best practices in data storage, retrieval, governance and privacy protection
• Drive automation of processes and workflows to reduce manual effort and enhance system maintainability

• 5+ years of professional software engineering experience in Python, C++ or Java
• 3+ years of professional experience in Python as a primary language (non‑scripting)
• Extensive experience in Polars, Pandas or Num Py
• 1‑3 years of professional experience with Linux operating systems
• Thorough understanding of databases and SQL
• Experience with large Python codebases
• Bachelor’s or master’s degree in Computer Science or a related area
• High attention to detail

• Experience with data engineering or ETL pipelines
• Knowledge of finance
• Knowledge of C++…