Principal Python Engineer

Industry / Sector:FinTech/Financial Services

Salary/Rate:£170,000-£200,000

Job type:Perm

Town/City:London

County:London

Job ref:NP-8914586

Post Date:16. 11. 2025

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Meet Our Recruiter

Craig Mullen

Director

0203 479 4931

craig@ncounter.co.uk

About the Role

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.

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