Senior Software Engineer

DW Search; Greater London; Hybrid; GBP 80,000 - 120,000; Full time

Job summary

A leading financial services recruitment agency is seeking an experienced Python Engineer to contribute to a front office-facing platform within a tier-one investment bank. This role involves building backend services in Python, working on data-intensive workflows, and improving system design. Candidates should have strong experience in production environments, ideally with financial sector knowledge. The position offers a hybrid working model based in London, with competitive salary packages ranging from £80,000 to £120,000.

Qualifications

• Strong backend Python experience in production environments.
• Experience with complex systems in business-critical environments.
• Solid understanding of system design and data flows.

Responsibilities

• Building and evolving backend services in Python.
• Working on data-intensive workflows and messaging-driven architectures.
• Collaborating closely with engineers and front office users.

Skills

Python backend engineering

System design

Data flows

Distributed systems

Tools

MongoDB

Oracle

Java

React

Job description

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.