C# .NET / REACT Developer

Talan Group; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

Talan Group is seeking a skilled C# .NET Developer with REACT experience to join our delivery teams working on front office platforms within Global Markets environments.

In this role, you will design, build, and enhance solutions supporting front-office users in fast-paced trading environments. Strong development experience in C#/.NET and REACT is required.

Key responsibilities include maintaining applications, developing RESTful APIs, and collaborating with stakeholders.

Qualifications

• Strong development experience in C# / .NET & REACT.
• Solid experience with relational databases and SQL.
• Excellent communication skills, both written and verbal.

Responsibilities

• Design, develop and maintain front-office applications.
• Contribute across the full software development lifecycle.
• Engage directly with business stakeholders to understand requirements.

Skills

C# / .NET development

REACT (server-side and/or full-stack)

Web-based applications development

RESTful APIs

SQL and relational databases

Application performance and optimisation

Agile collaboration

Investment banking or capital markets environments

Front office systems knowledge

Multi-threaded or distributed systems

CI/CD tools

Analytical and problem-solving skills

Tools

Jenkins

TeamCity

Ansible

Job description

Talan is seeking a skilled C# .NET Developer with REACT experienceto join our delivery teams working on Front Office platforms within Global Markets environments.

In this role, you will design, build, and enhance regulatory, alerting, and sales enablement solutions, supporting front-office users in fast-paced trading environments. You will work at the intersection of business and technology, delivering high-performance applications that directly impact sales and trading activities.

You will contribute to the development of front-office sales and trading toolswithin a Global Markets ecosystem, supporting a range of business-critical applications.

Operating in a distributed agile environment, you will collaborate with:

• Front office stakeholders (sales & trading)
• Application support and production teams
• QA and testing teams
• Distributed delivery teams across Europe and globally

This role offers exposure to complex, real-time systemswithin capital markets.

Key Responsibilities

• Design, develop and maintain front-office applications, components and utilities
• Contribute across the full software development lifecycle(analysis, design, development, testing, deployment, and support)
• Build and deliver high-performance, scalable applications
• Develop RESTful APIs and modern UI applications using React
• Engage directly with business stakeholdersto understand requirements and deliver value-driven solutions
• Collaborate with production support teams to ensure smooth releases and system stability
• Provide third-line supportand assist with troubleshooting production incidents
• Contribute to code reviews and continuous improvement initiatives

Skills & Experience (Required)

Strong development experience in C# / .NET & REACT (server-side and/or full-stack)

• Experience building web-based applications and RESTful APIs
• Solid experience with relational databases and SQL
• Strong understanding of application performance and optimisation
• Excellent communication skills, both written and verbal
• Experience working in agile, collaborative environments
• Experience within investment banking or capital markets environments
• Knowledge of front office systems (FX, Rates, Credit, or derivatives)
• Experience with multi-threaded or distributed systems
• Familiarity with CI/CD tools (e.g. Jenkins, TeamCity) and deployment tools (e.g. Ansible)
• Strong analytical and problem-solving skills