Senior Software Engineer Python AWS - Front Office

Client Server Ltd.; Greater London; On-site; GBP 110,000 - 130,000; Full time

Job summary

Client Server Ltd. in London is seeking a Senior Software Engineer with strong Python backend experience and AWS expertise to shape high‑performance trading systems. You will lead design, development and cloud infrastructure, delivering hands‑on engineering and driving best practices.

The role requires ownership of end‑to‑end delivery, occasional frontend work, and collaboration with stakeholders across the business. London/WFH hybrid arrangement with a competitive package.

Qualifications

• Advanced backend development in Python.
• Strong knowledge of AWS, DevOps practices, CI/CD and containerisation.

Responsibilities

• Design, develop and enhance high‑performance trading systems and cloud infrastructure.
• Lead projects from design through deployment and promote engineering best practices.
• Own end‑to‑end software delivery lifecycle in Front Office trading environments.
• Collaborate with stakeholders to translate complex requirements into scalable solutions.

Skills

Python Backend

AWS

DevOps

CI/CD

Containerisation

Front Office Trading

Communication

Tools

Docker

Kubernetes

Job description

Senior Software Engineer Python AWS - Front Office

London, Greater London | £110k - £130k per year

Senior Software Engineer / Developer (Python AWS) London / WFH to £130k

Are you a Python technologist with experience of Front Office trading environments?

You could be progressing your career on the Asset Management side of a global Japanese bank as they expand this product offering within the UK.

As a Senior Software Engineer, you'll design, develop and enhance high performance trading systems and cloud infrastructure that support critical front, middle and back office operations. Collaborating with stakeholders across the business, you'll translate complex requirements into scalable, resilient technology that drives efficiency and business growth.

You'll lead projects from design through to deployment, building secure, highly available systems capable of handling large volumes of market and trading data. Alongside hands‑on development, you'll champion engineering best practices, automation, DevOps and cloud architecture, helping to continuously improve the team's technical capabilities.

Location / WFH:

You'll be based in the London, Bank office three days a week with flexibility to work from home twice a week.

About you:

• You have advanced backend Python development skills
• You have a strong knowledge of AWS, DevOps practices, CI/CD, Containerisation
• You're comfortable with occasional front end work
• You have experience of owning the end-to-end software delivery lifecycle, are proactive in bringing solutions problems identified
• You have experience of working in Front Office trading environments
• You're pragmatic with great communication skills

What's in it for you:

As a Senior Software Engineer / Developer you will earn a competitive package including:

• Salary to £130k + bonus
• Pension