C# Developer - React

Talan; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

Talan is looking for a skilled C# Developer with REACT experience to join their delivery teams focusing on Front Office platforms. You will design and enhance regulatory and sales enablement solutions in fast-paced trading environments.

This role requires strong collaboration with stakeholders and contributions across the software development lifecycle, including building high-performance applications and RESTful APIs. Ideal for candidates experienced in investment banking or capital markets.

Qualifications

• 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 and deployment tools.
• Strong analytical and problem-solving skills.

Responsibilities

• Design, develop and maintain front-office applications.
• Contribute across the full software development lifecycle.
• Build and deliver high-performance, scalable applications.
• Develop RESTful APIs and modern UI applications using React.
• Engage directly with business stakeholders to understand requirements.
• Collaborate with production support teams for releases and stability.
• Provide third-line support and assist with troubleshooting.
• Contribute to code reviews and continuous improvement.

Skills

Web-based application development

RESTful APIs

Relational databases

Application performance optimization

Communication skills

Agile methodologies

Investment banking knowledge

Multi-threaded systems

CI/CD tools

Analytical problem-solving

Tools

Jenkins

TeamCity

Ansible

Job description

Talan is seeking a skilledC# Developer with REACT experienceto join our delivery teams working onFront Office platforms within Global Markets environments.

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

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

Operating in adistributed 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 tocomplex, real-time systemswithin capital markets.

Key Responsibilities

• Design, develop and maintainfront-office applications, components and utilities
• Contribute across the fullsoftware development lifecycle(analysis, design, development, testing, deployment, and support)
• Build and deliverhigh-performance, scalable applications
• DevelopRESTful APIs and modern UI applications using React
• Engage directly withbusiness stakeholdersto understand requirements and deliver value-driven solutions
• Collaborate with production support teams to ensuresmooth releases and system stability
• Providethird-line supportand assist with troubleshooting production incidents
• Contribute tocode reviews and continuous improvement initiatives

Skills & Experience (Required)

• Experience buildingweb-based applications and RESTful APIs
• Solid experience withrelational databases and SQL
• Strong understanding ofapplication performance and optimisation
• Excellent communication skills, both written and verbal
• Experience working inagile, collaborative environments
• Experience withininvestment banking or capital markets environments
• Knowledge offront office systems (FX, Rates, Credit, or derivatives)
• Experience withmulti-threaded or distributed systems
• Familiarity withCI/CD tools (e.g. Jenkins, TeamCity) and deployment tools (e.g. Ansible)
• Strong analytical and problem-solving skills