1 to 25 of 591 Permanent JavaScript Jobs in London

continuous improvement. Your responsibilities Design, build and evolve scalable back-end services using C# and .NET Core, alongside developing front-end features with modern JavaScript frameworks to enhance user experience. Design and implement RESTful APIs, ensuring high standards of performance, reliability and security. Build, deploy and operate services ...

continuous improvement. Your responsibilities Design, build and evolve scalable back-end services using C# and .NET Core, alongside developing front-end features with modern JavaScript frameworks to enhance user experience. Design and implement RESTful APIs, ensuring high standards of performance, reliability and security. Build, deploy and operate services ...

team. Essential Skills & Experience Experience developing full stack applications using modern front-end and back-end technologies. Strong programming skills in languages such as JavaScript/TypeScript, Java, C#, Python, or Node.js. Experience with front-end frameworks such as React, Angular, or Vue.js. Experience building and consuming RESTful APIs ...

development, testing, deployment, and support. Extensive experience (6+ years) in developing scalable web applications using ASP.NET Core, C#, Web API, Razor Pages, Angular, HTML, JavaScript, jQuery, and CSS. Hands‐on expertise in building Blazor Server and Blazor WebAssembly applications, with good understanding of the SignalR messaging framework for real‐time ...

architectural capability within Appvia’s engineering practice. Technical Skills Core technologies (in order of importance): Java/Spring NoSQL/SQL databases TypeScript/JavaScript HTML/CSS/XML Playwright Docker/Kubernetes Maven GitLab AWS Nice to have: GovUK UI Framework Azure/GCP .NET Why join Appvia ...

with different databases such as Postgres, MySQL, NoSQL (e.g., MongoDB), Redis is recommended. Web technologies – knowledge and experience working with web technologies such as JavaScript, HTML, CSS, TypeScript, C#, SASS, Stylus, Stylus, Python, and LESS. Web frameworks – knowledge and experience working with different frameworks like React Native, AngularJS, Angular2, VueJS ...

Agile ceremonies and code reviews Troubleshooting and resolving technical issues Contributing to architecture discussions Supporting production environments where required Typical technologies include: React TypeScript JavaScript C# .NET Node.js Python SQL Cloud Engineering & DevOps Work with experienced consultants to design, automate and manage cloud environments. You'll gain experience with: Amazon ...

designing and developing solutions utilising most of the following technologies:• Strong front end web development experience with Angular or React (we use Angular), Typescript, JavaScript, HTML/CSS with an eye for good UX• Experience in designing and building distributed systems using Microsoft C#, .NET Core and Web API• Experience ...

Spring Boot, .NET, RESTful APIs microservices), cloud platforms (AWS, Azure, GCP) and CICD tools GitLab, Jenkins Strong experience in responsive design principles Expertise in JavaScript(ES6+)/TypeScript, HTML5, CSS3, and modern frameworks (React preferred, Angular/Vue a plus). Experience of at least one leading Node framework (Express.js ...

applications using TypeScript, leveraging frameworks such as Next.js or Vite.GenAI Frameworks: Familiarity with tools like LangChain, LangGraph, CrewAI, or Vercel AI (in Python or JavaScript).LLM experience: Practical experience with Large Language Models (LLMs) such as OpenAI, Anthropic, Mistral, or Llama, and tools like Ollama.Cloud Platforms: Proficiency ...

software architecture experience. Full software development lifecycle delivery. Backend and/or full-stack software development. Modern programming languages such as Java, Python, JavaScript, or TypeScript. RESTful APIs and microservices architecture. GitLab, source control, and CI/CD pipelines. Docker, Kubernetes, virtualisation, and containerisation. Infrastructure as Code (Terraform or similar ...

Java (Core Java, Multithreading, Concurrency), Kotlin, Spring Boot, ReactJS. Cloud & Serverless: AWS Lambda, AWS Cloud Services, Kubernetes. Additional Technical & Functional Competencies Frontend Architecture: TypeScript, JavaScript (ES6+), Redux/Context API, HTML5, CSS3, REST/gRPC integration. Streaming & Messaging: Apache Kafka, Apache Flink. APIs & Protocols: RESTful web services, gRPC, JSON, Protocol ...

practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role using the following technologies: Frontend (JavaScript/TypeScript or Angular or React or Node) Backend (Java, SpringBoot, Hibernate, Kotlin) Experience in estimation and sizing Integration experience API Design experience Cloud experience ...

solutions Backend technology Strong programming experience with Java SpringBoot JPA Hibernate Junit RestAssured and Mockito Frontend technology Experience with React JS Redux Axios CSS JavaScript and HTML Database Experience with SQL MS SQL preferred Cloud technology Experience with aPaaS Openshift V4 DevOps tools Experience with GitLab Stash Jenkins Nexus JIRA ...

served Written production‐quality code using a variety of languages and frameworks, including but not limited to: Java, C#/.NET, Python, TypeScript, JavaScript, React, Go, Ruby, Scala, R, and SQL Leveraged AI‐assistive development tools for tasks like scaffolding, refactoring, debugging, test generation, and documentation Experience building or integrating ...

Experience building production software applications. Strong understanding of software architecture and software engineering principles. Experience with one or more modern technology stacks such as: JavaScript/TypeScript React/Next.js Node.js PHP/Laravel .NET Java Good understanding of APIs and system integrations. Experience working with relational databases such ...

immediately. To provide input to risk management processes, as required. Skills, Experience and Competencies Essential skills and experience Experience in C# .NET, Node.js, React, JavaScript, Typescript. Experience leveraging AI‐assisted development tools (e.g. code generation, automated testing, developer productivity tooling) to improve delivery speed and quality. Strong understanding of applying ...

served Written production-quality code using a variety of languages and frameworks, including but not limited to: Java, C#/.NET, Python, TypeScript, JavaScript, React, Go, Ruby, Scala, R, and SQL Leveraged AI-assistive development tools for tasks like scaffolding, refactoring, debugging, test generation, and documentation Experience building or integrating ...

Custom plugin development WooCommerce experience Gutenberg Block development WordPress security best practices Performance optimisation and Core Web Vitals Front End CSS3 SASS/SCSS JavaScript (ES6+) jQuery Responsive development Cross-browser compatibility Modern Development Git version control Composer npm Vite REST APIs JSON CI/CD principles Experience ...

direct experience calling LLM APIs in production code with an understanding of token management, latency, and cost tradeoffs Basic understanding of web technologies including JavaScript, HTML, and CSS Familiarity with cloud fundamentals (AWS, Azure, or GCP), containers (Docker), and CI/CD pipelines Understanding of Agile delivery fundamentals Experience with ...

scalable backend services and APIs using Python frameworks such as FastAPI, Flask, or Django. Develop responsive, intuitive, and secure user interfaces using React, TypeScript, JavaScript, HTML5, CSS and Tailwind. Build healthcare and research applications that support clinical, operational, and AI-enabled workflows. Collaborate with Product, AI/ML/Data ...

clearance Significant experience in Agile environments (e.g., SCRUM, Kanban). Solid technical development background with strong coding skills in Java, C#, TypeScript, JavaScript, or similar Proven expertise in automation testing, with hands‐on experience using tools like Playwright, Selenium, Cypress, or RestAssured Strong knowledge of integration testing and automation frameworks ...

ever the same. Tech stack required ideally: You can expect to work with the following technologies to ensure scalable, high-performance applications: Programming Languages: JavaScript/TypeScript, Java, C# Frameworks: Vue/Angular/React/Node/Next, Spring/Spring Boot, .NET/ASP.NET Cloud platforms ...

clearance Significant experience in Agile environments (e.g., SCRUM, Kanban). Solid technical development background with strong coding skills in Java, C#, TypeScript, JavaScript, or similar Proven expertise in automation testing, with hands-on experience using tools like Playwright, Selenium, Cypress, or RestAssured Strong knowledge of integration testing and automation frameworks ...

tools across all aspects of the SDLC: Back-End Microservices Development: Java, Spring Framework Mobile Development: iOS: Swift, Xcode, MVC Architecture Android: Android Studio, JavaScript, CSS, AJAX, Java Web Services Front-End Web Development: React or Angular, Apigee TypeScript, HTML5 Generative AI & AI Agents: Tools: GitHub Copilot with various models ...