C# Software Engineer Front Office Trading Technology Investment Bank

eFinancialCareers; Greater London; Hybrid; GBP 120,000 - 135,000; Full time

Benefits offered by this job

Hybrid working model

Performance-related bonus

Comprehensive benefits package

Job summary

eFinancialCareers is looking for a hands-on C# Software Engineer to join its front office trading technology team in London. You will help modernise a business-critical trading platform used by front office teams, delivering enhancements, APIs, and cloud-enabled services.

The role offers a competitive salary of £120,000-£135,000 plus bonus and benefits, a hybrid working model, and opportunities to influence technology strategy and large-scale platform transformation.

Qualifications

• Proven experience in C# and .NET development.
• Experience with relational databases (Oracle, SQL Server, PostgreSQL).
• Experience designing APIs and distributed applications; DevOps and CI/CD exposure.

Responsibilities

• Deliver enhancements and new capability across a high-impact trading technology platform.
• Design and build scalable applications, services and APIs using modern .NET technologies.
• Contribute to architectural decisions and longer-term technology strategy.
• Drive improvements around automation, resilience, performance and operational efficiency.
• Collaborate with engineering and business stakeholders to translate requirements into solutions.
• Support migration of legacy apps to modern cloud-native architectures.

Skills

C# & .NET

Trading systems

DevOps practices

API design

Cloud platforms

Tools

Oracle

SQL Server

PostgreSQL

AWS

GCP

CI/CD tooling

Job description

C# Software Engineer | Front Office Trading Technology | Investment Bank

London-based | £120,000 - £135,000 + bonus + benefits

C# | .NET | Cloud | Trading Systems | DevOps | API Development

The Role:

A major financial services organisation is looking for a Software Engineer to help modernise and enhance a business-critical trading platform used by front office teams.

This is a hands-on engineering role with genuine influence over technology direction, offering the opportunity to work on large-scale platform transformation, modern engineering practices, and cloud adoption within a fast-moving environment.

What You Will Be Doing:

• Deliver enhancements and new capability across a high-impact trading technology platform
• Design and build scalable applications, services and APIs using modern .NET technologies
• Contribute to architectural decisions and longer-term technology strategy
• Drive improvements around automation, resilience, performance and operational efficiency
• Partner closely with engineering and business stakeholders to translate requirements into practical solutions
• Support the migration of legacy applications towards modern cloud-native architectures

What You Bring:

• Strong software engineering capability across C# and .NET
• Experience working with relational databases such as Oracle, SQL Server or PostgreSQL
• Knowledge of API design and distributed application development
• Exposure to modern engineering practices including DevOps, CI/CD and automated testing
• Experience modernising or migrating legacy applications to current .NET platformsCloud experience across AWS, GCP or similar enterprise cloud environments

The Package:

• Competitive base salary in the region of £120,000 - £135,000
• Performance-related bonus
• Comprehensive benefits package
• Hybrid working model
• Opportunity to influence the evolution of a strategically important trading technology estate