Senior C# WPF Developer - PnL and Risk team

MARGO; London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading financial consulting firm in London is seeking a Senior C# WPF Developer with over 6 years of experience in developing high-performance desktop applications. The ideal candidate will have a deep expertise in WPF and C#, working closely with trading desks and focusing on quality and compliance. This role offers a unique opportunity to contribute in a dynamic environment while continuously evolving professionally.

Benefits

Equal employment opportunities

Inclusive work environment

Qualifications

• 6+ years’ experience building WPF C# desktop applications in a high-performance trading environment.
• Deep expertise in WPF and C#.

Responsibilities

• Design & Development of high-performance WPF C# applications.
• Work closely with trading desks, pricing heads, and global infrastructure teams.
• Develop unit tests and automated test suites.

Skills

WPF

C#

Agile delivery

Problem-solving

Continuous learning

Education

Degree in Computer Science, Engineering, Mathematics, or related field

Job description

MARGO is partnering with a leading financial institution to find a Senior C# WPF Developer with experience in Risk and Profit and Loss. Knowledge of Greeks is important in this role.

What you’ll do:

1. Design & Development
2. Build and enhance high-performance WPF C# applications
3. Collaboration & Delivery
4. Work closely with trading desks, pricing heads, and global infrastructure teams
5. Participate in sprint planning, estimation, and regular status reporting
6. Maintain accurate technical documentation, topology diagrams, and release records
7. Quality & Compliance
8. Develop unit tests and automated test suites
9. Follow all legal, regulatory, and internal compliance standards (e.g., market-abuse regulations)
10. Contribute to change-management processes, ensuring minimal business disruption

Tech stack & skills:

• Deep expertise in WPF and C#
• Agile delivery mindset; rapid prototyping and iterative improvement
• Systematic reasoning, transparency, and accountability
• Ability to juggle competing priorities with a solutions-driven attitude
• Continuous learner: eager to adopt new technologies and share insights

Technical fit – what we’re looking for:

• Degree (or equivalent) in Computer Science, Engineering, Mathematics, or related field
• 6+ years’ experience building WPF C# desktop applications in a high-performance trading environment

WHAT’S NEXT?

1. First meeting: You will meet with a Talent Acquisition Manager and a member of the executive committee to discuss your background, professional goals, and learn more about MARGO and the opportunities we offer.
2. Challenge yourself: Participate in commercial negotiation simulations with one of your future managers, who will also provide feedback based on their experience.
3. Final motivation interview: You will meet MARGO’s partners to confirm mutual fit and discuss your vision and aspirations.

APPLY NOW

As an employer, MARGO offers equal employment opportunities regardless of gender, ethnicity, religion, sexual orientation, social status, disability, or age. MARGO is committed to fostering an inclusive work environment that reflects the diversity of its teams, and several actions are taken daily to achieve this!