Senior .NET Engineer in London

Senior .NET Engineer in London

London Full-Time 70000 - 90000 Β£ / year (est.) No working from home possible
Intellias

At a Glance

  • Tasks: Design and build trading platform components for a leading hedge fund.
  • Company: Join a top-tier financial services firm with a focus on innovation.
  • Benefits: Competitive salary, remote work options, and opportunities for professional growth.
  • Other info: Dynamic team environment with a clear path to career advancement.
  • Why this job: Make an impact on mission-critical trading systems using cutting-edge technology.
  • Qualifications: Strong C#, .NET, Kafka, and SQL skills required.

The predicted salary is between 70000 - 90000 Β£ per year.

We're looking for a Senior Backend Developer with strong .

NET expertise to join a high-impact engagement building trading platform capabilities for one of the world's largest hedge funds.

You'll bring deep experience in C#, Kafka, and SQL, and be ready to work in a fast-paced, high-stakes financial services environment alongside experienced engineers.

Project overview

This role sits on the Order Management and Execution Management (OMS/EMS) platform for one of the largest hedge funds in the world.

The client is expanding the range of asset classes supported by its trading systems, and is scaling up engineering capacity to deliver this.

Engineers will initially be embedded within one of the client's five project-aligned teams to learn the domain, codebase, and ways of working.

Once ramped up, the team will transition to operating as a standalone delivery unit, working in parallel with the client's other teams to accelerate onboarding of new asset classes.

Requirements

  • Strong hands-on experience with C# and the . NET ecosystem
  • Practical experience with Kafka (streaming, messaging, event-driven architectures)
  • Strong SQL skills and experience with relational databases
  • Proven track record as a senior backend engineer delivering production-grade systems
  • Comfortable working with modern AI-assisted development practices (e. g. Claude Code, agentic AI development)
  • Will be a plus
  • React JS experience or a full-stack profile
  • Background in Financial Services (FSI), particularly trading, OMS/EMS, or capital markets
  • Exposure to high-performance or low-latency systems

Responsibilities

  • Design, build, and maintain components of the OMS/EMS platform supporting the onboarding of new asset classes.
  • Work embedded within one of the client's five project teams initially, to learn the trading domain, architecture, and codebase.
  • Transition into a standalone team delivering asset class onboarding work in parallel with the client's other teams.
  • Write high-quality, well-tested, production-grade code for systems operating in a live trading environment.
  • Apply modern AI-assisted engineering practices (e. g. Claude Code, agentic development workflows) to accelerate delivery.
  • Collaborate closely with client engineers, business analysts, and stakeholders to translate requirements into working software.
  • Contribute to code reviews, technical design discussions, and continuous improvement of engineering practices.
  • Why this position
  • Work on mission-critical trading infrastructure for one of the largest hedge funds in the world.
  • Exposure to large-scale, high-performance Order Management and Execution Management systems.
  • Build deep domain knowledge across multiple asset classes and financial services engineering.
  • Work using modern, AI-native development practices rather than legacy delivery models.
  • Clear path from an embedded, learning-focused phase to running as an autonomous, standalone delivery team.
  • #J-18808-Ljbffr

Senior .NET Engineer in London employer: Intellias

As a Senior Python Engineer at our client's leading global investment management company in London, you will be part of a dynamic and innovative work culture that prioritises cutting-edge technology and data-driven solutions. The firm offers exceptional employee growth opportunities, including hands-on experience with AI agents and large-scale data systems, while fostering a collaborative environment that values creativity and technical excellence. With a commitment to professional development and a focus on impactful projects, this role provides a unique chance to contribute to the future of AI in finance.

Intellias

Contact Details:

Intellias Recruitment Team

We think you need these skills to ace Senior .NET Engineer in London

C#
.NET ecosystem
Kafka
SQL
Relational Databases
AI-assisted development practices
Production-grade systems