Full Stack Developer – Treasury Technology

Millennium; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Millennium is seeking an experienced software engineer to join its Treasury Technology team in London. You will partner with business stakeholders globally to understand needs, define requirements and deliver effective technology solutions across Treasury, Counterparty Risk and Treasury Operations.

You will own end-to-end delivery of large systems, apply solid engineering practices, and work with .NET (C#, ASP.NET Web API), Angular or Ember.js, AWS and modern databases in a fast-paced, globally

Qualifications

• At least five years of hands-on programming experience with object-oriented design and patterns.
• Hands-on .NET development with C# and ASP.NET Web API.
• Experience building web applications using Angular or Ember.js.
• Experience with AWS or other cloud technologies.
• Recent experience owning one or more large software systems and managing the full application lifecycle.
• Strong problem-solving and analytical skills.
• Experience with enterprise databases such as SQL Server, Sybase, or Oracle; knowledge of CD tools.

Responsibilities

• Partner with business stakeholders globally to understand business needs, define requirements, and deliver effective technology solutions
• Develop and enhance Treasury applications that support critical Treasury, Counterparty Risk, and Treasury Operations processes
• Own delivery timelines for Treasury applications and projects, coordinating priorities and dependencies across a global technology organization
• Take end-to-end ownership of software systems throughout the application lifecycle, from design and development through deployment and ongoing support
• Apply sound engineering practices to solve complex business problems in a fast-paced environment

Skills

Object-oriented programming

Design patterns

Service-oriented architecture

Concurrency

SOLID principles

C#

ASP.NET Web API

Angular

Ember.js

AWS

SQL Server

Kubernetes

Kafka

Python

Tools

Continuous delivery tools

Job description

About Millennium

Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

About Millennium

Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team

Core to the health and growth of Millennium’s business, the Information Technology organization develops flexible, scalable technology and advanced proprietary systems, including next-generation analytical and trading capabilities. Within this organization, the Treasury Technology team develops systems used by Treasury, Counterparty Risk, and Treasury Operations teams across the firm. Its platforms support Margin, Cash and Collateral Management, Treasury Operations, and Equity Finance for Treasury analysts, Front Office users, Portfolio Managers, and Senior Management.

What You’ll Do

• Partner with business stakeholders globally to understand business needs, define requirements, and deliver effective technology solutions


• Develop and enhance Treasury applications that support critical Treasury, Counterparty Risk, and Treasury Operations processes


• Own delivery timelines for Treasury applications and projects, coordinating priorities and dependencies across a global technology organization


• Take end-to-end ownership of software systems throughout the application lifecycle, from design and development through deployment and ongoing support


• Apply sound engineering practices to solve complex business problems in a fast-paced environment

What You Bring

• At least five years of hands‑on programming experience, with a strong understanding of object‑oriented programming, design patterns, service‑oriented architecture, concurrency, and SOLID principles


• Hands‑on .NET development experience, including C# and ASP.NET Web API


• Experience building web applications using Angular, Ember.js, or similar frameworks


• Experience working with AWS or other cloud technologies


• Recent experience owning one or more large software systems and managing the full application lifecycle


• Strong problem‑solving and analytical skills, with the ability to work independently and deliver in a dynamic environment


• Experience with enterprise databases such as Microsoft SQL Server, Sybase, or Oracle, as well as continuous delivery tools


• Familiarity with capital markets concepts and operational structures; experience with Kubernetes, Kafka, and Python is a plus