Senior Software Engineer

Python Engineer (Core Trading Platform | Front Office)

£80,000-£120,000 base salary plus strong package

London - Hybrid

We’re hiring Python Engineers to join a front office-facing platform build within a tier-one financial services organisation - this is a greenfield platform in a high-growth area of the business, focused on scaling core trading workflows, data, and automation across multiple teams.

The role

You’ll be working on a backend-heavy platform that underpins pricing, workflows, and trade data across the business. The system is being rolled out more broadly, with a focus on improving visibility, reducing manual processes, and creating a single, scalable platform.The work is strongly focused on Python and system design, building production-grade services rather than lightweight scripting.

What you’ll be doing

• Building and evolving backend services in Python within a distributed system
• Working on data-intensive workflows and messaging-driven architectures
• Contributing to a platform designed as a single source of truth across teams
• Automating manual processes and enabling faster product and workflow rollout
• Collaborating closely with engineers and front office users

Tech environment

• Python (core focus), some Java and React (experience not essential)
• Messaging systems and distributed architectures
• MongoDB (core data store), some Oracle

What we’re looking for

• Strong Python backend engineering experience in production environments
• Experience building and operating complex, business-critical systems
• Solid understanding of system design, data flows, and distributed systems
• Comfortable working in evolving platforms with multiple stakeholders
• Financial services experience is helpful but not required if candidates can show a genuine interest and conceptual understanding

Location

Hybrid working (London-based, with 3 days in office required)

Contract type

Permanent or contract (inside IR35) options available

If you’re an experienced, Python focused engineer looking to work on a major project for a tier one investment bank, apply now.

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