JavaScript & .NET Developer (Front Office Trading Platforms)

Hybrid · Lisbon · Global Markets Technology Join a high‑impact technology team at the heart of a major global banking group, where innovation, stability and world‑class engineering come together. As part of a multicultural organisation spanning London, Lisbon, Paris, New York and Mumbai, you’ll contribute to the development of cutting‑edge Front Office trading applications used worldwide by Global Markets teams. You will work on flagship platforms such as Cortex and SmartDerivatives, empowering traders and sales teams with fast, reliable and scalable tools for pricing, trading and e‑commerce of complex financial products.

Our technology stack combines modern HTML5/JavaScript front‑ends with robust .NET and Java services, and the team is currently driving major transformation initiatives in UI convergence, modularisation and platform industrialisation. We are looking for a talented and proactive developer, passionate about building high‑performance systems and excited to work in a challenging real‑time trading environment. 🔧 What You Will Do

Participate in the full Agile software development lifecycle: requirements analysis, design, development, testing and code reviews

Develop new features and enhance existing components of complex Front Office trading platforms

Collaborate with production support teams to ensure smooth releases and platform stability

Work closely with fellow developers to uphold best practices in architecture, coding and design

Contribute to technical choices, design discussions and long‑term platform strategy

Mentor and support less‑experienced developers (code reviews, pair programming, coaching)

Take part in functional and technical design sessions

Build reference implementations and technical documentation

Moderate and review contributions from the wider development community 💼 Technical Skills We’re Looking For Core Requirements

Strong professional experience in enterprise‑grade software development

Excellent command of C# and .NET

Strong experience with JavaScript/TypeScript and HTML5

Solid hands‑on experience with modern JS frameworks and libraries (e.g. Angular, React, Web Components, RxJS)

Good knowledge of CSS and component‑based UI design

Strong understanding of software engineering best practices and design patterns

Experience with Scrum/Agile delivery

Familiarity with test‑driven development and Continuous Integration

Experience with .NET libraries such as Reactive Extensions (RX), Unity, NUnit Nice-to-Haves

Experience building real-time, high-performance trading applications

Knowledge of front-office systems in any of the following:

Interest Rates

FX

FX Options

Understanding of real-time messaging protocols

Ability to design and profile performant software architectures 🌍 Why This Role?

Work directly with Front Office users on high-impact trading solutions

Join a global organisation with strong investment in technology and innovation

Contribute to award‑winning platforms used across the world

Be part of major modernisation and optimisation initiatives

Collaborate with top-tier engineers across five international locations

Grow your technical, functional and leadership skills in a fast-paced environment 🗣️ Language Skills

English: Mastery level