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Joseph Harry Ltd
Lead Python Developer Software Engineer Asset Manager London

Lead Python Developer Software Engineer Asset Manager London

On site

London, United kingdom

£ 900 /day

Senior

Freelance

23-02-2026

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Skills

Leadership Python JavaScript TypeScript PostgreSQL Architecture Azure react AWS Agile Redux GCP

Job Specifications

Lead Python Developer (Software Engineer Programmer Developer React TypeScript Python PostgreSQL Node Fixed Income Equities Derivatives JavaScript Node Credit Rates Bonds Agile AWS GCP Azure Buy Side Asset Manager Investment Management Finance Front Office Trading Financial Services Contract Contractor) required by our asset management client in London. You MUST have the following:
Good experience as a Senior/Lead React Developer/Software Engineer/Programmer
Demonstrable leadership experience such as carrying out projects, delegating work, reporting to senior management, architecture and mentoring more junior team members
Expert TypeScript, JavaScript, React and Node
Advanced Ag-Grid
Experience in finance
Agile
The following is DESIRABLE, not essential:
Trading, equities, fixed income, derivatives
Redux, Redux Saga
AWS or GCP
PostgreSQL
Python
Role: Lead Python Developer (Software Engineer Programmer Developer React TypeScript Python PostgreSQL Node Fixed Income Equities Derivatives JavaScript Node Credit Rates Bonds Agile AWS GCP Azure Buy Side Asset Manager Investment Management Finance Front Office Trading Financial Services Contract Contractor) required by our asset management client in London. You will lead one of five teams that are responsible for the build and maintenance of a multi-asset, in-house portfolio management system. You will be a hands-on lead but also have line management responsibility. The team has a Back End emphasis, using a stack of Python, Node, PostgreSQL and AWS. There would be a small amount of Front End exposure, but your Front End ability can be limited. The Front End is React, TypeScript, Redux, Redux Saga and Ag-Grid .
You will join the team having demonstrable leadership experience such as carrying out projects, delegating work, reporting to senior management, architecture and mentoring more junior team members. It is imperative that you have worked in finance. From a technology perspective, you will be an expert across Python, PostgreSQL and AWS. An appreciation of trading and financial products, including derivatives, would be desirable, but is not essential.
The department has a relaxed hybrid working policy. You will need to come into the office for demos and other meetings but, generally, around twice/week is sufficient.
This is an environment that has been described as the only corporate environment with a start-up/fintech attitude towards technology. Hours are 9-5.
Duration: 12-24 months
Rate: £700-900/day

About the Company

Joseph Harry was established to deliver a high level recruitment service to IT within the financial sector. Our reach is global in both permanent and temporary contract markets. We pride ourselves in providing quality service to both our clients and candidates, maintaining our long-lasting relationships. We employ consultants who provide an intelligent and knowledgeable approach to ensure greater efficiency and quality in service. We see our staff as our most valuable asset. We value transparency and trust in all our deali... Know more