Senior React Engineer

Grid Dynamics; Greater London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

Medical insurance

Flexible schedule

Corporate social events

Professional development opportunities

Job summary

Grid Dynamics is seeking a highly skilled Senior React Engineer based in Greater London. Join our front-office technology team to build next-generation electronic trading applications. You will design and develop high-performance web applications that manage vast amounts of streaming market data while ensuring exceptional user experience.

Ideal candidates should have strong commercial experience with React and TypeScript, and familiarity with financial services. We offer a competitive salary, flexible schedule, and opportunities for professional development.

Qualifications

• 5+ years of experience in frontend development with a focus on React and TypeScript.
• Experience in high-throughput environments like trading or financial applications.
• Strong understanding of browser internals and optimization techniques.

Responsibilities

• Design and develop high-performance web applications with React and TypeScript.
• Maintain responsive user interfaces handling streaming market data.
• Integrate low-latency data services with backend teams.

Skills

React

TypeScript

Browser performance optimization

Real-time data management

Frontend architecture

Testing frameworks (Playwright, Cypress)

Job description

We are seeking a highly skilled Senior React Engineer to join a front-office technology team responsible for building next-generation electronic trading and market data applications.

This is an opportunity to work on highly performant, real-time systems used by traders and sales teams globally. You'll be responsible for building responsive, data-intensive user interfaces that process and visualise large volumes of streaming market data while maintaining exceptional user experience and performance.

Responsibilities

As a Senior React Engineer, you will work closely with frontend, backend and business stakeholders to deliver mission-critical trading applications. You'll play a key role in designing frontend architecture, optimising performance, and ensuring applications remain responsive under heavy data loads.

• Design and develop high-performance web applications using React and TypeScript.
• Build and maintain real-time user interfaces consuming large volumes of streaming market data.
• Optimise browser performance, rendering pipelines, memory usage and application responsiveness.
• Work closely with backend engineering teams to integrate low-latency data services.
• Contribute to frontend architecture, technical standards and engineering best practices.
• Develop robust testing strategies and maintain high levels of application quality.
• Participate in system design discussions and performance tuning initiatives.
• Support the evolution of trading and market data platforms used globally.

Requirements

Essential Skills & Experience

• Strong commercial experience developing applications using React and TypeScript.
• Experience delivering production-grade frontend systems in trading, market data, financial services or other high-throughput environments.
• Deep understanding of browser internals, rendering performance, virtualisation, memory management and frontend optimisation techniques.
• Experience consuming and managing real-time data feeds using WebSockets, pub/sub messaging or similar technologies.
• Understanding of concepts such as backpressure, reconnection handling, snapshots and state recovery.
• Strong understanding of software engineering best practices, testing and code quality.
• Experience with Playwright, Cypress, Selenium or similar testing frameworks.
• Ability to understand and troubleshoot backend services, particularly Java-based systems.

Nice to have

• Experience migrating Angular or AngularJS applications to React.
• Knowledge of low-latency messaging platforms such as Solace, Tibco EMS, Kafka or Aeron.
• Familiarity with binary protocols and wire formats including SBE, FlatBuffers or Protobuf.
• Experience with AG Grid or similar enterprise-grade data grid frameworks.
• Exposure to containerised deployment environments and cloud-native architectures.
• Experience building applications for electronic trading, order management, market making, RFQ/RFS workflows or single dealer platforms.

Domain Knowledge

• Foreign Exchange (FX)
• Spot and Forward Trading
• FX Options
• Pricing and Market Making
• Transaction Cost Analysis (TCA)
• Market Data Platforms

We offer

• Opportunity to work on bleeding-edge projects
• Work with a highly motivated and dedicated team
• Competitive salary
• Flexible schedule
• Benefits package - medical insurance, sports
• Corporate social events
• Professional development opportunities
• Well-equipped office