Senior Front-End Engineer

Overview

Permanent, Full-Time, Hybrid

Connecting clients to markets – and talent to opportunity.

With 4,300 employees and over 400,000 retail and institutional clients from more than 80 offices spread across five continents, we’re a Fortune-100, Nasdaq-listed provider, connecting clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

At StoneX, we offer you the opportunity to be part of an institutional-grade financial services network that connects companies, organizations, and investors to the global markets ecosystem. As a team member, you'll benefit from our unique blend of digital platforms, comprehensive clearing and execution services, personalized high-touch support, and deep industry expertise. Elevate your career with us and make a significant impact in the world of global finance.

Business Segment Overview: A Swift-accredited service bureau and member, our Payments division provides NGOs, institutions and non-profits the ability to make a local difference, globally – with transparent pricing across 180+ countries and 140+ currencies. 

Technology Ecosystem:

• Languages & Frameworks: 
• Architecture: Microservices, Event-driven (Kafka, AMQP), CQRS 
• Cloud & Infra: Azure, Kubernetes, Docker, Rancher 
• Databases: MongoDB, MS SQL Server, PostgreSQL
• Tooling: Git, Visual Studio, VS Code, Rider, Copilot, CI/CD pipelines (Azure DevOps, GitHub)
• Back End: C#, .NET 9, ASP.NET
• Front End: React, TypeScript/JavaScript (ES6+), HTML5, and CSS/SASS

Responsibilities

Position Purpose: We’re looking for a Senior Software Engineer to join our team and play a key role in designing, developing, and delivering high-quality software. This role is ideal for someone who thrives on end-to-end ownership of projects, enjoys collaborating across the full SDLC, and brings strong frontend expertise in React.

While the focus is frontend, experience with .NET/C# backend services is a strong plus. You’ll work closely with product managers, designers, and fellow engineers to build scalable applications that deliver real business value.

Primary Duties Will Include:

• Take part in the full software development lifecycle — from story pointing and design through to coding, testing, and deployment.
• Build responsive, modern UIs using React, TypeScript/JavaScript (ES6+), HTML5, and CSS/SASS.
• Collaborate with backend engineers on RESTful APIs, services, and data integration.
• Write unit and integration tests, using TDD where appropriate.
• Contribute to architecture discussions, code reviews, and continuous improvement practices.
• Use tools like Azure DevOps, CI/CD pipelines, Git, and cloud services to deliver reliable, scalable solutions.
• Lead project execution within your squad — ensuring scope, timelines, and quality standards are met.

Qualifications

To land this role you will need:

• 7+ years of professional software engineering experience, with at least 5 years in Front End development.
• Strong expertise in React (preferred) or similar UI frameworks (Angular, Vue).
• Proficiency in JavaScript (ES6+) and/or TypeScript, plus strong knowledge of HTML5 and CSS/SASS.
• Experience designing and delivering responsive web applications.
• Solid grounding in software design principles and architecture.
• Strong collaboration skills - able to work across Product, QA, and DevOps.
• Growth mindset and ability to lead projects without direct people management.

What Makes You Stand Out:

• Experience with C#/.NET backend development and RESTful services.
• Knowledge of SQL Server or MongoDB.
• Exposure to Azure cloud services, Docker/Kubernetes, microservices, CI/CD pipelines.
• Familiarity with financial markets, payments, or trading platforms.
• Understanding of UX principles and user-centered design.

Education / Certification Requirements:

• Bachelor's degree in Computer Science, Software Engineering, or equivalent experience 

Working Environment:

• Hybrid - private parking for employees.
• FTE (UoP).

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