Software Engineer (C#) - Financial Services, London - TWE43166

twentyAI; City Of London; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

A global trading organisation is seeking a skilled C# Developer to join their team. You will develop full-stack solutions, contribute to cloud migration efforts, and ensure the stability of applications. The ideal candidate has 3–6 years of experience with C#, SQL, and DevOps tools. This role offers a flexible hybrid working model and the chance to work with emerging technologies like Azure and Python.

Benefits

Flexible hybrid working model

Access to emerging technologies

Strong culture of innovation

Qualifications

• 3–6 years’ experience as a software engineer or similar.
• Hands-on experience with Azure, Git, CI/CD, and DevOps tooling.
• Experience working in Financial Services is a plus.

Responsibilities

• Develop and maintain full-stack solutions using C#, SQL, and React.
• Support mission-critical regulatory applications in an Agile feature team.
• Participate in technical governance and architectural decision-making.

Skills

C#

SQL

REST APIs

DevOps

Agile methodologies

Tools

Azure

Git

Jira

Docker

Kubernetes

Job description

Overview

A global trading organisation is seeking a skilled C# Developer to join a high-impact team dealing with business critical projects. This is an exciting opportunity to contribute to strategic solutions while being part of a broader modernisation programme into a cloud and data platform focused environment. As the business moves away from legacy systems and invests in modern architecture, you’ll work at the intersection of stability and transformation — ensuring continuity in existing applications while helping shape the future tech landscape.

What You’ll Be Doing

• Develop and maintain full-stack solutions using C#, SQL, and front-end technologies like React.
• Support mission-critical regulatory applications as part of a collaborative, Agile feature team.
• Contribute to the strategic migration from legacy platforms to a cloud-based architecture using Python, Azure, and Databricks.
• Apply best practices in DevOps, CI/CD, and test-driven development.
• Participate in technical governance and architectural decision-making.
• Collaborate with cross-functional teams to deliver high-quality, scalable software in a Kanban Agile environment.

What We’re Looking For

• 3–6 years’ experience as a software engineer or similar.
• Strong skills in C#, SQL, REST APIs, and single-page web applications.
• Hands-on experience with Azure, Git, CI/CD, and DevOps tooling.
• Exposure to or interest in Python and Databricks as part of a modern data ecosystem.
• Familiarity with tools such as Jira, Docker, Kubernetes, Octopus, Artifactory, Oracle, and SQL Server.
• A problem-solver with a strong understanding of software development practices.
• Experience working in Financial Services is a plus, but not essential.

Why Join?

• Play a pivotal role in a cloud transformation journey using modern data and analytics platforms.
• Gain experience with emerging technologies including Python, Azure, and Databricks.
• Join a stable, globally recognised organisation with a strong culture of innovation.
• Enjoy a flexible hybrid working model and inclusive, collaborative culture.