Senior Python Developer – Multi-Billion Dollar Hedge Fund - Mortgage Technology - London - Hybrid – Up to £300k TC

CompanyMondrian Alpha

LocationLondon Area, United Kingdom

Posted At1/19/2026

UK Visa Sponsorship Analytics

Analytics are greyed out due to low classification confidence (45.0%).

Occupation Type

Programmers and software development professionals

Occupation Code Skill LevelHigher Skilled

Sponsorship Salary Threshold

£54,700 (£28.05 per hour)

Occupation rate applies

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Description

Senior Python Developer – Multi-Billion Dollar Hedge Fund - Mortgage Technology - London - Hybrid – Up to £300k TC

My client, a leading UK hedge fund with $70 billion in AUM, is seeking to appoint a Senior Python Developer within its technology organisation. Our client is undertaking one of the largest infrastructure modernisation programmes in UK financial services and is expanding its engineering capability across key investment areas, including its fast-growing mortgage platform.

This role sits within a business-facing engineering team that builds high-impact tools used daily by investment, risk, finance, and operations. You will play a pivotal role as the firm continues its migration away from legacy systems and enhances its bespoke internal platforms.

The Role

As a Business Engineering Developer, you will:

Build, enhance, and maintain applications supporting mortgage origination, valuation, analytics, and reporting.
Develop production-ready Python code to automate manual processes and streamline workflows.
Engage directly with business users to capture requirements and deliver scalable, pragmatic engineering solutions.

Support and extend tools within a ring-fenced legacy environment while aligning new development with next-gen architecture.

Identify and deliver automation opportunities across data pipelines, reporting frameworks, and analytical tooling.

Collaborate with engineering teams involved in wider transformation initiatives.

About the Client Team

Our client’s Engineering group partners closely with investments, risk, finance, and operations. Led by an ex-Goldman Sachs engineering leader, the team is known for:

High delivery velocity
Strong stakeholder relationships
Creative problem-solving
Significant influence across the organisation

You will join at a time of major investment in technology, with clear opportunities to contribute to systems that will define the firm’s next decade.

What We’re Looking For

Strong Python skills (pandas, NumPy, SQLAlchemy, etc.)
Experience working in business-facing engineering roles
Background in automating workflows, building internal tools, or integrating data-driven systems

Knowledge of mortgages, fixed income, or structured products beneficial

Exposure to Rust or C++ advantageous but not required

Strong communication skills and ability to partner with business stakeholders

Why Join Our Client

Help shape one of the largest tech modernisation programmes in UK FS
Work on high-impact tooling used directly by investment and operational teams
Flat, engineering-led culture with strong leadership support
Excellent benefits and on-site facilities
The stability of a major financial institution with the pace of a modern tech buildout