151 to 175 of 2,110 ECMAScript Jobs in London

Job Title: Backend Python Developer Job Type: Permanent Location: London Salary: £55,000-£65,000 DOE Skills: Python, AWS, CI/CD, Docker Kubernetes, JavaScript Roc Search have partnered with a vibrant data focused agency in London. They are seeking an experienced Backend Engineer with a strong foundation in Python and object-oriented programming. In this role, you will be … practical experience). Proven experience as a Backend Engineer or a similar role, with a strong track record of designing and developing robust backend systems. Proficiency in Python and Javascript Familiarity with logging frameworks like Serilog for efficient log capturing and analysis. Experience with containerization tools like Docker and orchestration frameworks like Kubernetes. Knowledge of Helm and YAML for defining More ❯

You will: Design, develop, and maintain scalable web applications that meet the evolving needs of our users and business. Write clean, efficient, and well-documented code in Python and JavaScript, adhering to best practices and coding standards. Collaborate effectively with cross-functional teams including product management, design, and other engineering disciplines to define, scope, and implement new features and improvements. … data analysis and reporting. You will have: Senior level demonstrable experience in web development , with a strong portfolio showcasing your technical skills and contributions. Strong proficiency in Python and JavaScript with a deep understanding of their core principles and best practices. Proven experience with Python web frameworks such as Flask (experience with others like Django is a plus). Expertise … in modern JavaScript frameworks like Vue, React or Angular, including a solid understanding of component-based architecture and state management. Solid familiarity with RESTful APIs and service-orientated architecture for building and integrating web services. Solid understanding of database technologies , including both relational (SQL, e.g., PostgreSQL, MySQL) and non-relational (NoSQL, e.g., MongoDB) databases. Practical experience with version control systems More ❯

Developing website features and fixing bugs using C#, Entity Framework, Azure Service Bus and SQL Server · Writing unit and integration tests using NUnit · Styling website changes in CSS · Developing JavaScript code using frameworks such as Vue · Attending scrum meetings and briefings with project owners and peers · Writing SQL scripts to modify database schema in SQL Server 2014 Technical Skills: Required … ASP.NET 4.6+ MVC 5 · C# 6 including advanced language features e.g., generics, lambdas, delegates · Design Patterns and SOLID Principles · Entity Framework 6+ · SQL Server 2014+ · TDD/NUnit · Javascript/JQuery/AJAX · HTML5 · CSS 3 Desirable: · ASP.NET Core · Azure Service Bus · Entity Framework Core · Vue · Agile methodologies/Scrum · Automated browser testing/SpecFlow/Selenium · SignalR · ECMAScript6 · AngularJS More ❯

difference for school communities. What you'll bring: 5+ years real-world experience in object-oriented programming languages (eg C#, C++). 5+ years real-world experience in frontend javascript, libraries, and frameworks (eg Javascript, HTML, CSS, React, Vue, Typescript). Experience working with SQL/NoSQL databases and are comfortable designing and implementing database solutions. A keen interest in More ❯

Relevant Experience: React.Js, Typescript, Azure Job Description: • Proven experience as a Front-End Developer with a focus on React.js, and Typescript. • Familiarity with C# and .Net. • Strong proficiency in JavaScript, ES6/ES7, and related front-end technologies. • Familiarity with state management libraries such as Redux. • Experience with version control systems, such as Git. • Experience with the Web Content Accessibility More ❯

10+ years of experience in UI/UX design and development. Proven experience with modern front-end frameworks such as React, Angular, or Vue.js. Strong understanding of HTML, CSS, JavaScript, and TypeScript. Excellent problem-solving skills and attention to detail. Strong communication and leadership skills. Experience with cloud platforms like AWS, Azure, or Google Cloud. Knowledge of networking protocols and … security. Skills: React, Angular, Vue.js HTML5, CSS3, JavaScript, TypeScript Responsive Design Cross-browser Compatibility User Interface Design Version Control (Git) Cloud Computing (AWS, Azure, Google Cloud) Networking (TCP/IP, DNS, HTTP/HTTPS) Security (SSL/TLS, OAuth) This role is pivotal in ensuring that user interfaces are both aesthetically pleasing and highly functional, maintaining high standards of usability More ❯

we use AWS, Google Maps) Passion for best design and coding practices and a desire to develop new bold ideas In-depth knowledge of web technologies including HTML, CSS, Javascript, AJAX. Bonus points: Understanding of open source projects React, Redux (Typescript) & Next.js Vanilla Javascript, CSS (tailwind & SCSS) skills LLMs Python AWS Selenium Chef Vagrant Highcharts Cursor Who We Think You More ❯

such as App Engine, IT Service Management (ITSM), IT Operations Management (ITOM), Security Operations (SecOps), Customer Service Management (CSM) & Financial Services Operations (FSO). 4+ years of experience in JavaScript or it’s frameworks such as Angular, React or Vuejs. Experience in implementing complex, highly configurable technologies, preferably ServiceNow Customer and Industry Workflow Solutions Strong understanding of the ServiceNow platform … end delivery standpoint. Excellent written and verbal communication skills. One team approach and team collaboration. Positive mindset to learn new technologies. Good to Have: Prior experience on working on JavaScript Frameworks like Angular or REACT. Knowledge on Document management and generation systems/applications. Experience with CI/CD pipelines. Familiarity with message brokers (e.g., RabbitMQ, Kafka). Knowledge of More ❯

such as App Engine, IT Service Management (ITSM), IT Operations Management (ITOM), Security Operations (SecOps), Customer Service Management (CSM) & Financial Services Operations (FSO). 4+ years of experience in JavaScript or it’s frameworks such as Angular, React or Vuejs. Experience in implementing complex, highly configurable technologies, preferably ServiceNow Customer and Industry Workflow Solutions Strong understanding of the ServiceNow platform … end delivery standpoint. Excellent written and verbal communication skills. One team approach and team collaboration. Positive mindset to learn new technologies. Good to Have: Prior experience on working on JavaScript Frameworks like Angular or REACT. Knowledge on Document management and generation systems/applications. Experience with CI/CD pipelines. Familiarity with message brokers (e.g., RabbitMQ, Kafka). Knowledge of More ❯

great fit for our team: 5+ years of hands-on experience in object-oriented programming languages (e.g., C#, C++). 5+ years of real-world experience with modern frontend JavaScript, libraries, and frameworks (e.g., JavaScript, HTML, CSS, React, Vue, TypeScript). Comfortable designing and implementing database solutions with experience in both SQL and NoSQL databases. A keen interest in developing More ❯

3+ years of relevant work experience Preferred Qualifications Bachelor's degree, OR 3+ years of relevant work experience Knowledge of and ability to develop back-end (e.g. Core Java, JavaScript) code in support of package and product development. This includes the extension of capabilities of packages and products. The ability to develop and utilize Application Program Interfaces (APIs), a set … efficient access and modifications. This includes a collection of data values, the relationships among them, and the functions or operations that can be applied to the data. Knowledge of JavaScript and front-end technologies/frameworks like Angular or ReactJS is desirable. Knowledge of with Agile methodologies and iterative software development lifecycle principles. Knowledge of using Jira and confluence. Proficient More ❯

would be great. Any experience with leading projects and mentoring more junior developers would be great!Ideal candidates will have at least 6 years full stack development experience with : JavaScript React or Angular Node.js HTML CSS Agile And nice to have : MongoDB GraphQL REST API’s JSON Redis SQL Databases Typescript This is a great opportunity to join an established More ❯

software providers throughout the development lifecycle. Provide technical guidance and mentorship to less experienced developers. Required Skills Strong experience with C#, .NET Core, Azure, and test automation. Proficiency in JavaScript and a modern front-end framework (React preferred). Familiarity with microservices, containerization, and site reliability engineering. Solid understanding of Agile/Scrum methodologies and software design principles. Experience with More ❯

a skill set that encompasses: .NET, .NET Core/ASP.NET MVC, C# and Azure SQL. Our client can provide you with Greenfield project work and exposure to: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. This is a truly amazing opportunity to More ❯

Senior Software Engineer London, UK - Fully Onsite Key Technologies: Java, JavaScript, React, Docker, Kubernetes Perm Role | £80,000 - £120,000 Harrington Starr has partnered with a leading financial institution on a mission to transform investment banking through cutting-edge technology. Their Investment Banking Middle Office Technology team plays a crucial role in enabling efficient trade management with institutional counterparties. As More ❯

strong experience and a skill set that encompasses: .NET, .NET Core/ASP.NET MVC and SQL Azure. Our client can provide you with industry recognised training in: .NET 9, JavaScript, React, Angular 19, Microservices, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. You will follow a structured career development programme More ❯

with strong experience and a skill set that encompasses: .NET, .NET Core/ASP.NET MVC and SQL Azure.Our client can provide you with industry recognised training in: .NET 9, JavaScript, React, Angular 19, Microservices, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. You will follow a structured career development programme More ❯

complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency in Node.js (preferred), or .NET/Java. Front End: Solid experience with JavaScript , React , and TypeScript . Strong foundation in Agile/Lean methodologies and modern software delivery practices. Working knowledge of UI/UX principles and prototyping tools. Excellent communication and technical More ❯

complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency in Node.js (preferred), or .NET/Java. Front End: Solid experience with JavaScript , React , and TypeScript . Strong foundation in Agile/Lean methodologies and modern software delivery practices. Working knowledge of UI/UX principles and prototyping tools. Excellent communication and technical More ❯

complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency in Node.js (preferred), or .NET/Java. Front End: Solid experience with JavaScript , React , and TypeScript . Strong foundation in Agile/Lean methodologies and modern software delivery practices. Working knowledge of UI/UX principles and prototyping tools. Excellent communication and technical More ❯

complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency in Node.js (preferred), or .NET/Java. Front End: Solid experience with JavaScript , React , and TypeScript . Strong foundation in Agile/Lean methodologies and modern software delivery practices. Working knowledge of UI/UX principles and prototyping tools. Excellent communication and technical More ❯

clean, maintainable code and improving system performance Collaborating with senior engineers and learning best practices Tech you'll use: C# and .NET Core or Framework SQL Server HTML, CSS, JavaScript REST APIs, JSON, HTTP Any Front End framework like React, Angular, or Blazor Nice to have: Interest in authentication protocols like OAuth2, SAML, or OpenID Connect Familiarity with Azure AD More ❯

clean, maintainable code and improving system performance Collaborating with senior engineers and learning best practices Tech you'll use: C# and .NET Core or Framework SQL Server HTML, CSS, JavaScript REST APIs, JSON, HTTP Any frontend framework like React, Angular, or Blazor Nice to have: Interest in authentication protocols like OAuth2, SAML, or OpenID Connect Familiarity with Azure AD or More ❯

a Content Management System (CMS) such as Sitecore, EpiServer, Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity, or dotnetnuke. Our client can provide you with industry-recognized training in: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban, and MongoDB. This is a unique opportunity to join More ❯

either web application development (.NET Core/ASP.NET MVC, C#) or winforms/WPF (C#) development. Our client will provide you with training into: .NET 9, WPF, MVVM, Prism, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and Azure SQL. You will follow the firms official More ❯