1 to 25 of 315 ECMAScript Jobs in London

accepted Full Stack Developer (India Location : SITEL) Total experience : 8-9 years Relevant experience : 5-6 year. Very strong in HTML, CSS, Javascript, PHP, JQuery, SQL, Angular, React, Web/API services, web architect, Node.js Python will be add‐on advantage. Upload your profile on Imurgence and Send Profile ...

third‐party and enterprise platforms (e.g. CRM, payment systems) Front‐End/Full Stack (Desirable) Experience with Angular or React Strong understanding of modern JavaScript/TypeScript frameworks Quality & Engineering Practices Strong experience with: TDD/BDD (SpecFlow, Gherkin) Unit & integration testing frameworks Commitment to engineering best practice and code ...

Front/Backend Engineer in Typescript in a professional environment.Front-end skillsProficient in HTML5, CSS3, and TypescriptProficient in React, Redux, ReactQueryExperience with modern JavaScript frameworks - ReactKnowledge of version control systems (Git)Understanding of cross-browser compatibilityFamiliarity with RESTful APIs, GraphQL and WebsocketsExperience with CSS pre-processors e.g. TailwindBack-end skillsProficiency ...

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 ...

components working within an Agile team of business analysts, developers and quality assurance engineers as well as UCD and product. Technical Skills Proficiency in JavaScript (ES6+) and experience with TypeScript. Strong knowledge of Node.js and asynchronous programming. Strong experience with Express.js, or other Node.js frameworks. Experience with Gov.UK Front ...

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 ...

Agile and DevOps practices, with a focus on continuous integration and delivery. Some proficiency in one or more programming languages (e.g., Python, Java, JavaScript) and experience with software architecture patterns. Experience with cloud platforms (e.g., AWS, Azure, GCP) and infrastructure as code. Familiarity with CI/CD pipelines, automated testing ...

backend and DevOps teams across the full delivery lifecycle Required Experience Strong experience in UI or Frontend Architecture within complex environments Expertise in React, JavaScript (ES6+), TypeScript, HTML5 and CSS3 Experience designing SPA or micro-frontend architectures Strong understanding of API integration (REST, API gateway patterns, BFF) Experience working ...

Development, API Development, Microservices, Cloud Infrastructure, Infrastructure Engineering, Platform Engineering, Algorithms, Data Structures, Object Oriented Programming, Functional Programming, Python, C++, Rust, Go, Java, TypeScript, JavaScript, Database Design, SQL, NoSQL, PostgreSQL, System Architecture, Technical Leadership, Engineering Strategy, Software Reliability, Performance Optimisation, Automation, DevOps, CI/CD, AWS, Azure, Google Cloud, Kubernetes ...

Reliability Engineering practices Required Skills & Experience We are interested in professionals with experience across some or all of the following: Development & Engineering Java, Python, JavaScript, C++, C# Software application development Automated testing frameworks Spec-driven software development DevOps & Automation Git, GitOps GitLab, Jenkins Terraform, Ansible, Chef, Puppet ArgoCD, Flux ...

requirement for securities licenses if client‐facing responsibilities arise. Qualifications At least 3years of proven software development experience in relevant industry. Proficiency in C#, JavaScript (React and/or Angular), Typescript, relational/NoSQL databases, and cloud technologies (preferably AWS). Experience designing, developing, and operating scalable microservice architectures ...

Experience as a Software Engineer with strong capability in one or more of the following: Backend development (Java Spring Boot, Maven, Python) Frontend development (JavaScript/TypeScript, React, npm) Proven experience designing, developing, and deploying scalable backend systems. Familiarity with DevOps, CI/CD and containerisation technologies (Jenkins, Kubernetes, Docker ...

polyglot is preferred. Strong understanding of software development methodologies such as Agile, TDD and DevOps. Some proficiency in multiple programming languages such as Python, JavaScript, or similar. Extensive experience writing well-tested code. Good knowledge of cloud platforms (e.g., AWS, Azure, GCP) and infrastructure as code Experience with CI/ ...

tools to augment software development Experience with financial or billing-related systems is a plus Basic experience building Node.js services using JavaScript or TypeScript is beneficial Our Offer Flexi-Week : We prioritise your mental health and wellbeing by offering you a four-day Flexi-Week (with one lighter or completely ...

testing [cucumber, nightwatch]) Nice to have skills: AWS Knowledge of Open Source BPMN workflow engines (Camunda, Activiti or Flowable) Experience on a front-end javascript framework such as react, angular or vue.js RedHat OpenShift for container orchestration Knowledge of NCSCs 14 cloud security principles. SC Clearance: Zaizi works with ...

efforts, introducing new ideas and technologies What You'll Bring Proven experience as a Full Stack Engineer or similar role Expertise in Node, React, JavaScript/TypeScript, HTML, CSS, and responsive design principles Strong understanding of Back End technologies and best practices Passion for writing clean, well-tested code Experience ...

date with new technologies, including Azure, AI, and the Microsoft Power Platform. Experience Required: C#/.NET, ASP.NET and .NET Core. SQL Server. JavaScript, HTML and CSS. REST APIs. Microsoft Azure. Azure DevOps and Git. SharePoint Online. Power Automate (Microsoft Power Platform). Strong communication and problem-solving skills. Desirable ...

healing solutions. Experience with SQL programming, database design, stored procedures, query optimization, and data access technologies. Knowledge of web technologies including ASP.NET, HTML5, CSS3, JavaScript, and modern application integration practices. Experience working with data interchange formats such as XML, JSON, AJAX, and REST‐based integrations. Strong understanding of Software Development ...

code, backed by strong testing discipline (TDD, plus performance and security testing). Knowing when to keep a human in the loop. Advanced modern JavaScript/TypeScript, NodeJS and React. Web development principles (REST, SPA...). Microservice architecture, AWS and DevOps. Building LLM-powered features: tool-calling, retrieval-augmented generation ...

clear, accurate technical documentation for systems and processes. Required Skills & Qualifications Strong experience developing secure, maintainable, and scalable software. Proficiency in C#, ASP.NET, Java, JavaScript, Python, Web APIs, and Microsoft SQL. Hands‐on automation experience using PowerShell, Bash, Ansible, Terraform, JSON/YAML. Experience operating cloud‐first, mission-critical systems ...

architecture Deep understanding of relational databases, SQL language and ORM tools Deep understanding of message brokers Experience with front‐end development using HTML, CSS, JavaScript frameworks Experience with Test Driven Development (TDD)/Behavior Driven Development Experience with cloud platforms and container technologies Experience with performance tuning and system optimization ...

Proficiency in performance testing tools like JMeter, Gatling, K6, Neoload, or Webload Strong coding skills in at least one language such as Java, TypeScript JavaScript, Python, C#, Scala, or PHP Experience designing and building automation frameworks Familiarity with Agile development environments ( SCRUM, Kanban, TDD, BDD ) Implementing pipelines using common tooling ...

/C#, ASP.NET, Web APIs, and modern engineering practices. Experience with Sitecore JSS and/or headless architectures (e.g., Sitecore Headless Services) and modern JavaScript frameworks (React/Next.js desirable). Solid knowledge of Azure and cloud‐native patterns (App Service, Functions, Storage, Key Vault, CDN); infrastructure as code experience ...

platform experience built real-time conversational systems with production STT/TTS integration Proficiency in Python (production-grade, async programming, type hints) and JavaScript/TypeScript (full-stack development) RAG implementation experience built retrieval-augmented generation systems with vector databases MLOps & deployment hands-on with Docker, Kubernetes, CI/ ...

technical field, or equivalent practical experience. 8+ years of progressive software engineering experience developing applications in object‐oriented languages such as Java, Python, or JavaScript, including experience leading technical delivery across teams or major initiatives. Extensive hands‐on experience architecting and delivering cloud‐native solutions using AWS or equivalent, containerized ...