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Job Summary

We are looking for a Full Stack Engineer with strong experience in React.js, backend development, AWS, microservices, and Kubernetes. The ideal candidate will work closely with Product, UX, and Engineering teams to build scalable, high-performance applications and services.

Key ResponsibilitiesDesign and develop scalable frontend applications using React.js.Develop backend APIs and services using Node.js, Golang, and/or Python.Build and maintain microservices and distributed systems.Develop and deploy cloud-based applications using AWS.Work with Docker and Kubernetes for containerization and orchestration.Collaborate with Product Managers, UX Designers, and Engineers to deliver new features.Ensure seamless frontend and backend integration with a focus on performance and reliability.Participate in code reviews, testing, debugging, and CI/CD automation.Document technical designs, APIs, and workflows.Work closely with UX designers to ensure implementations match the intended user experience.Required SkillsStrong experience with React.js and full-stack development.Hands-on experience with Node.js, Golang, and/or Python.Experience with AWS, Kubernetes, Docker, and CI/CD.Strong understanding of REST APIs, microservices, and distributed systems.Good problem-solving and communication skills.Preferred ExperienceExperience with live video platforms and video editing tools.Experience building LLM agents and MCP-based solutions.Strong experience with Golang.Production experience with Kubernetes.

GCS is acting as an Employment Business in relation to this vacancy.

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Design, develop, and maintain responsive, scalable frontend applications using React.js, with a strong focus on performance, accessibility, and usability.Build intuitive, high-quality user interfaces that deliver a seamless and engaging user experience across devices.Develop, maintain, and integrate backend APIs and services using Node.js, Go, or Python.Collaborate closely with Product Managers, UX/UI Designers, and Engineering teams to define, build, and deliver new features and enhancements.Partner with UX designers to ensure implemented solutions accurately reflect the intended user experience, design specifications, and requirements.Ensure reliable and seamless integration between frontend applications, backend services, and third-party systems.Design, build, and maintain microservices and distributed systems using modern cloud-native technologies and compute platforms.Develop and support cloud-based applications and deployments, primarily leveraging AWS services.Contribute to CI/CD pipelines, deployment automation, and engineering best practices to improve development and release processes.Participate in code reviews, automated testing, debugging, and performance optimization to ensure high standards of code quality, reliability, and maintainability.Create and maintain clear technical documentation, including architecture and technical designs, workflows, APIs, and development processes.Troubleshoot production and development issues and work collaboratively with cross-functional teams to identify and implement effective solutions.Continuously evaluate and adopt modern technologies, tools, and engineering practices to improve product quality and development efficiency.

GCS is acting as an Employment Business in relation to this vacancy.

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Job Title: React UI Developer

Location: Alexandria, VA (Hybrid - 4 Days Onsite)

Job Description:

We are hiring a React UI Developer to build scalable, high-performance web applications for an enterprise platform. The ideal candidate has experience creating responsive interfaces, integrating REST services, and supporting cloud-native deployments.

Responsibilities

Design and develop modern UI components using React.js.Build reusable frontend modules with JavaScript/TypeScript.Integrate frontend applications with RESTful APIs.Support Node.js Backend-for-Frontend services.Deploy applications using Docker, Kubernetes, and AWS.Work with cross-functional Agile teams to deliver high-quality software.

Required Skills

5-8 years of React development experience.Strong JavaScript/TypeScript skills.HTML5 and CSS3.Node.js.AWS, Docker, Kubernetes.REST APIs.Git and PostgreSQL.

Nice to Have

ReduxCI/CD pipelinesAWS S3GolangLive streaming or media platformsAI/LLM tools

GCS is acting as an Employment Business in relation to this vacancy.

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We are hiring a Senior UI Developer to join a leading banking client working on a greenfield electronic trading platform within their Fixed Income technology team.

This is a hands-on development role building a next-generation eTrading application used by front office traders and sales teams to price, quote, and execute trades in real time.

London (Liverpool Street) | Hybrid (50% office)
💰 Up to £900-1000 per day (Inside IR35)
📅 12-month contract

They're looking for someone with:

Strong React + AG Grid experience building trading UIsSolid Java backend Front office eTrading / Fixed Income or FX backgroundExperience with low-latency systems & RFQ workflows

It's a hands-on build role (not managerial) on a brand-new platform, working closely with a lead developer.

If this sounds of interest, please apply and I'll come back to you with full details.

GCS is acting as an Employment Business in relation to this vacancy.

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