Principal Python Engineer

Ncounter Limited; City Of London; Hybrid; GBP 100,000 - 140,000; Full time

Job summary

Ncounter Limited is seeking a Principal Python Engineer to design and evolve high‑performance compute frameworks underpinning trading and research platforms. This hybrid, permanent role offers visibility across the business and a chance to shape scalable tools and distributed systems at scale.

You will work at the intersection of software engineering and HPC, mentoring peers and delivering robust Python services, with Docker/Kubernetes and CI/CD automation integral to daily work.

Qualifications

• 6+ years of professional software development experience.
• Strong proficiency in high-performance Python.
• Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation.
• Background in distributed systems and large-scale compute frameworks.

Responsibilities

• Design, develop, and maintain performant 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.

Skills

Python

Distributed systems

CI/CD

JVM languages

Tools

Docker

Kubernetes

Linux

CI/CD pipelines

Job description

Principal Python Engineer

Permanent | Hybrid

Ncounter is supporting a global investment firm in hiring a Python 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,