Job Title: Senior Full-Stack Engineer (Java & React)
About the Role
We are looking for an experienced Senior Full-Stack Engineer to design, build, and maintain high-performance, user-facing applications. In this role, you will work end-to-end-architecting distributed backend microservices in Java and building intuitive, responsive frontends using React.
Key Responsibilities
Architect, develop, and deploy scalable backend microservices and RESTful/GraphQL APIs using Java (Spring Boot) .
Build responsive, component-driven web interfaces using React, TypeScript, and modern state management (Redux/Zustand) .
Collaborate with cross-functional teams (Product, Design, DevOps) to translate complex product requirements into robust technical solutions.
Optimize applications for maximum speed, scalability, high availability, and low latency.
Write clean, maintainable, and well-tested code (unit, integration, and E2E testing).
Participate in design sessions, code reviews, and mentor junior engineers on engineering best practices.
Required Qualifications
5+ years of professional software engineering experience in full-stack web application development.
Strong proficiency in Java (8+) and modern frameworks like Spring Boot / Spring Cloud .
Deep expertise in React.js , including hooks, modern component architecture, and TypeScript / JavaScript (ES6+) .
Solid hands-on experience designing and consuming RESTful APIs and microservices architectures.
Strong database skills with relational databases (e.g., PostgreSQL, MySQL ) and/or NoSQL databases (e.g., MongoDB, Redis ).
Familiarity with build tools, CI/CD pipelines, and version control ( Git, Docker, Kubernetes ).
Experience with testing frameworks (e.g., JUnit, Mockito, Jest, React Testing Library ).
Nice-to-Have
Experience with cloud platforms ( AWS, GCP, or Azure ).
Hands-on experience working on high-traffic, e-commerce, or marketplace-scale systems.
Familiarity with message brokers such as Kafka or RabbitMQ .
Randstad Technologies is acting as an Employment Business in relation to this vacancy.
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Fullstack Engg in London employer: Randstad Digital
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