Software Engineer - Treasury

Harnham; Greater London; On-site; GBP 120,000 - 200,000; Full time

Job summary

Harnham is seeking a Software Engineer to join a high-performing team building mission-critical software that powers core operations in a leading investment firm. You will own parts of production systems, collaborate with business stakeholders, and contribute to end-to-end delivery across treasury, fund accounting, and middle office functions.

You'll work with Python services and established OO codebases, design scalable solutions, and participate in architectural discussions.

Qualifications

• Strong commercial software engineering experience with Python in a production environment.
• Experience with an OO language such as Java, C#, or C++.
• Strong SQL skills and relational databases.
• Background in buy-side financial services or asset management.
• Ability to communicate technical concepts clearly to both technical and non-technical stakeholders.
• Knowledge of treasury, fund accounting, middle office, financing, stock loan, or related operations is desirable.

Responsibilities

• Design, build, and maintain production software across treasury, fund accounting, compliance, and middle office functions.
• Own systems from development to deployment and ongoing enhancement.
• Collaborate closely with business stakeholders to understand requirements and deliver practical solutions.
• Work across a mix of modern Python services and established object-oriented codebases.
• Contribute to architectural discussions and system design decisions.
• Partner with teams across technology and operations to solve complex business challenges.

Skills

Python

Java

C#

C++

SQL

Finance domain knowledge

Stakeholder communication

Job description

If you are looking for a software engineering role that combines technical ownership, business impact, and exposure to front, middle, and operational functions within a sophisticated investment environment, this opportunity offers a rare chance to build and own critical systems that support a global financial organisation. You will work closely with business stakeholders, solve complex problems, and see the direct impact of your work across the organisation.

THE COMPANY

They are a globally operating investment firm with a strong engineering culture and a significant focus on technology, automation, and innovation. Technology teams are embedded within the business and play an essential role in driving operational efficiency and supporting key investment functions.

Their Enterprise Engineering team develops and maintains business critical platforms spanning treasury, fund accounting, compliance, and middle office operations. Engineers are trusted with genuine ownership and are encouraged to contribute ideas, challenge processes, and deliver meaningful improvements.

THE ROLE

As a Software Engineer you will join a high-performing engineering team building mission-critical software that powers core operations across a leading investment firm.

Specifically, you can expect to be involved in the following:

• Design, build, and maintain production software used across treasury, fund accounting, compliance, and middle office functions
• Take ownership of systems and applications from development through to deployment and ongoing enhancement
• Collaborate closely with business stakeholders to understand requirements and deliver practical solutions
• Work across a mix of modern Python services and established object-oriented codebases
• Contribute to architectural discussions and system design decisions
• Partner with teams across technology and operations to solve complex business challenges

SKILLS AND EXPERIENCE

The successful Software Engineer will have the following skills and experience:

• Strong commercial software engineering experience with Python in a production environment
• Experience with at least one object-oriented programming language such as Java, C#, or C++
• Strong SQL skills and experience working with relational databases
• Background within buy-side financial services, hedge funds, asset management, or prime brokerage environments
• Ability to communicate technical concepts clearly to both technical and non-technical stakeholders
• Knowledge of treasury, fund accounting, middle office, financing, stock loan, or related operational functions is highly desirable

BENEFITS

The successful Software Engineer will receive the following benefits:

• Salary up to £200,000 - depending on experience