Skills

Communication Leadership Python SQL PostgreSQL GitHub CI/CD DevOps Docker Kubernetes Azure DevOps Test Architecture git SQL Server Azure Software Development Agile Pandas Analytics Data Science CI/CD Pipelines Microservices GitHub Actions Mathematics

Job Specifications

We are seeking a high-calibre Senior Python Developer to join our London-based Engineering squad. Sitting at the heart of our Front-Office analytics platform, you will bridge the gap between complex energy market fundamentals and high-performance software engineering.

You will be responsible for the architecture and delivery of scalable data products that power real-time trading decisions. As a senior member of the London hub, you will act as a technical lighthouse mentoring junior talent, driving TDD standards, and ensuring our cloud-native infrastructure is as agile as the markets we trade in.

Key Responsibilities

Engineering Excellence: Design and build robust, low-latency Python solutions for processing large-scale financial and energy market datasets.
Architectural Leadership: Lead decisions on system design, transitioning legacy scripts into scalable, containerised microservices.
Stakeholder Engagement: Partner directly with Traders, Quants, and Product Managers to translate market requirements into production-ready code.
Mentorship: Conduct rigorous code reviews and foster a culture of continuous learning for our mid-level and junior engineers.
DevOps Culture: Own your code from local dev to production, leveraging CI/CD automation and Kubernetes orchestration.
Operational Integrity: Troubleshoot business-critical production issues in a high-pressure, time-sensitive trading environment.

Technical Requirements

Core Stack (Must Have)

Expert Python (3.9+): Mastery of OOP, Design Patterns (Factory, Strategy, Observer), and logical data modelling. Familiarity with recent PEPs.
Data Science Tooling: Advanced use of pandas and SQLAlchemy. Experience with parquet and Arrow for high-performance memory management.
Testing: Strong advocate for TDD/BDD (Pytest, Behave); experience in building automated integration test suites.
Modern DevOps: Expert Git, Docker, and CI/CD pipelines (Azure DevOps/GitHub Actions).
SQL Mastery: Deep knowledge of PostgreSQL or SQL Server (Query tuning, indexing strategies, and complex joins).

Preferred Skills (Should Have)

Cloud & Orchestration: Hands-on Kubernetes (AKS/EKS) including Helm charts and StatefulSets.
Market Knowledge: Previous experience with ETRM systems, tick data, or financial risk analytics.
Build Tools: Experience with Poetry or uv for modern dependency management.

Qualifications & Experience

Experience: 7+ years in professional software development, with a significant tenure in London’s Financial Services or Energy Trading sectors.
Education: BSc/MSc in Computer Science, Mathematics, or a related Engineering field.
Soft Skills: Exceptional communication skills; the ability to explain complex technical trade-offs to non-technical stakeholders in a fast-paced environment.

About the Company

Randstad Digital is a trusted digital enablement partner that facilitates accelerated transformation for businesses by providing global talent, capacity, and solutions across specialized domains. Our talent solutions allow you to seamlessly scale your team while connecting you with skilled professionals around the world who align with your chosen technologies. Our focus lies in managed solutions, and we empower businesses to move at speed and achieve goals efficiently. We support four service lines including customer experie... Know more