Principal Python Software Engineer

Overview

In this role you will help build and extend data pipelines and event streaming for the largest equities exchange in Europe, plus trade reporting platforms. You’ll lead cross-system projects and mentor developers while maintaining high-quality, testable Python code. You will collaborate with business and sales to shape new products and features, and participate in R&D to adopt promising technologies. This is a hands-on leadership role in a tight-knit team driving mission-critical market infrastructure.

Pay / Benefits

• Private medical insurance for employees and families
• Life and long-term illness insurance
• Pensions contribution up to 7% of base salary
• 25 days holiday per year (increases with service)
• Tuition assistance and education opportunities
• Employee stock purchase plan

Responsibilities

• Collaborate with business development and sales to shape new products and features
• Design and build reliable, testable Python systems for trading operations
• Lead complex projects and coordinate across Europe and the United States
• Mentor other developers and lead debugging of challenging engineering problems
• Participate in R&D to identify and implement new technologies
• Provide production support and contribute to incident reviews and follow-up actions

Key requirements

• Expert Python knowledge
• Commitment to writing testable, maintainable code
• Proficiency with advanced SQL techniques
• Deep Linux knowledge
• Strong understanding of algorithms and data structures
• Degree in Computer Science or related field preferred
• Experience with TDD/BDD or other testing methodologies (highly preferred)
• Familiarity with PostgreSQL and Snowflake (preferred)
• Familiarity with Django, Flask or FastAPI (preferred)
• Familiarity with Apache Kafka (preferred)
• Familiarity with Apache Airflow (preferred)
• Familiarity with Java (preferred)
• Experience in one or more relevant financial areas (preferred)

• Mentoring and coaching
• Strong collaboration across teams and time zones
• Problem-solving under production pressure
• Python
• SQL
• Linux

…