Principal Python Engineer

Ncounter Limited; City Of London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A global investment firm is seeking a Principal Python Engineer to design and maintain high-performance frameworks and services. This hybrid role requires over 6 years of software development experience, with strong proficiency in Python and familiarity with distributed systems. You will have the opportunity to work on complex technical challenges and impact high-performance computing platforms.

Qualifications

• 6+ years professional software development experience.
• Strong proficiency in high-performance Python.
• Experience with at least one JVM language is an advantage.

Responsibilities

• Design, develop, and maintain performant frameworks and services in Python.
• Build productivity tools and platforms that streamline workflows.
• Work across distributed systems and automation pipelines.

Skills

High-performance Python

Distributed systems

Docker

Kubernetes

CI/CD automation

JVM languages (Java, Kotlin, Scala)

Job description

Principal Python Engineer

London Permanent Hybrid

Ncounter is supporting a global investment firm in hiring a Software Developer to help design and evolve internal compute frameworks that underpin their trading and research platforms. This is a high-impact role, working at the intersection of software engineering and distributed systems, with the opportunity to build scalable tools and frameworks used across the business.

What you ll do:

• Design, develop, and maintain performant, reliable frameworks and services in Python
• Build productivity tools and platforms that streamline workflows across investment and technology teams
• Contribute to code reviews and best practices, improving overall development quality
• Work across distributed systems, containers, and automation pipelines to deliver scalable solutions

What we re looking for:

• 6+ years professional software development experience
• Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices)
• Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage
• Background in distributed systems and large-scale compute frameworks
• Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation

This role offers the chance to work on complex technical challenges at scale, with direct impact on high-performance computing platforms. If you re a skilled Python engineer with distributed systems expertise and want to join a world-class engineering environment, apply today for a confidential conversation.