Permanent 'ECMAScript' Job Vacancies

476 to 500 of 3,889 Permanent ECMAScript Jobs

Senior Front End Engineer - React

Manchester, England, United Kingdom
djr
products. Working in a fast-moving Agile environment with CI/CD, automated testing, and code reviews at the core. What We’re Looking For Deep expertise in React , JavaScript/TypeScript, and modern front-end frameworks. Experience working with RESTful APIs and building rich, data-driven interfaces. Knowledge of cloud environments (Azure or AWS) and CI/CD pipelines More ❯
Posted:

Senior Front End Engineer - React

Manchester, Lancashire, United Kingdom
djr
products. Working in a fast-moving Agile environment with CI/CD, automated testing, and code reviews at the core. What We're Looking For Deep expertise in React , JavaScript/TypeScript, and modern front-end frameworks. Experience working with RESTful APIs and building rich, data-driven interfaces. Knowledge of cloud environments (Azure or AWS) and CI/CD pipelines More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Technical Lead

Brighton, Sussex, United Kingdom
Hybrid / WFH Options
Reed Technology
Microservices, and Event-based messaging systems. Proficiency in Agile and DevOps principles. Extensive experience with Microsoft Azure SaaS, PaaS, and IaaS. Strong understanding of web technologies including HTML, CSS, JavaScript, TypeScript, and frameworks like React.js, Angular, or Blazor/Web Assembly. In-depth knowledge of OOD, SOLID principles, GoF Design Patterns, and relational databases, particularly SQL Server. Experience in building More ❯
Employment Type: Permanent
Salary: GBP 67,000 - 91,000 Annual
Posted:

Software Technical Lead

Brighton, East Sussex, England, United Kingdom
Hybrid / WFH Options
Reed
Microservices, and Event-based messaging systems. Proficiency in Agile and DevOps principles. Extensive experience with Microsoft Azure SaaS, PaaS, and IaaS. Strong understanding of web technologies including HTML, CSS, JavaScript, TypeScript, and frameworks like React.js, Angular, or Blazor/Web Assembly. In-depth knowledge of OOD, SOLID principles, GoF Design Patterns, and relational databases, particularly SQL Server. Experience in building More ❯
Employment Type: Full-Time
Salary: £67,000 - £91,000 per annum, Inc benefits
Posted:

Senior Umbraco Developer (Decoupled Architecture Specialist)

Spalding, Lincolnshire, England, United Kingdom
Hybrid / WFH Options
Clear IT Recruitment Limited
Core/.NET 6+ • Proven experience delivering decoupled or headless CMS implementations • Solid understanding of REST APIs, JSON, and asynchronous data handling • Experience with front-end technologies: HTML5, CSS3, JavaScript (vanilla and/or frameworks) • Proficiency with Git and CI/CD pipelines • Understanding of security, performance, and scalability in web environments • Familiarity with SQL Server and database design Desirable More ❯
Employment Type: Full-Time
Salary: Salary negotiable
Posted:

Application Software Engineer Full-Stack

Manchester, Lancashire, England, United Kingdom
Hybrid / WFH Options
Nextech
development, ideally within complex or customer-facing systems. Experience delivering projects through the full software lifecycle, from design to live support. Strong technical foundation across modern web technologies, including: JavaScript/TypeScript (with Domain-Driven and Test-Driven Development) React (web and native) Java (Spring Boot, Spring Cloud, Spring Data) Familiarity with Kafka, MongoDB, Elasticsearch, and Redis Experience with HTML More ❯
Employment Type: Full-Time
Salary: £50,000 - £65,000 per annum
Posted:

Senior Software Engineer

Essex, South East, United Kingdom
Hybrid / WFH Options
Oscar Associates (UK) Limited
the future of their technology landscape. Key Responsibilities Own the development of new and existing web applications from concept to deployment. Build responsive, pixel-perfect UIs using HTML, CSS, JavaScript, and modern frameworks like Vue.js or Blazor. Develop and integrate C# .NET Web APIs with frontend applications. Contribute to architectural discussions and solution design for new projects. Implement improvements, optimizations More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
Posted:

Senior Full Stack Engineer

Manchester, UK
Hybrid / WFH Options
UrbanChain
/CD pipelines and engineering best practices Stay current with industry trends and recommend new technologies What We’re Looking For Strong commercial experience with React, Next.js, Node.js, and JavaScript Solid understanding of back-end development and API design Experience working with cloud platforms (preferably AWS) Familiarity with both SQL and NoSQL databases (e.g. PostgreSQL, MongoDB) Understanding of Git, CI More ❯
Posted:

Senior Full Stack Engineer

United Kingdom, UK
Hybrid / WFH Options
UrbanChain
CI/CD pipelines and engineering best practices Stay current with industry trends and recommend new technologies What Were Looking For Strong commercial experience with React, Next.js, Node.js, and JavaScript Solid understanding of back-end development and API design Experience working with cloud platforms (preferably AWS) Familiarity with both SQL and NoSQL databases (e.g. PostgreSQL, MongoDB) Understanding of Git, CI More ❯
Employment Type: Part-time
Posted:

Senior Full Stack Engineer

Manchester, Lancashire, United Kingdom
Hybrid / WFH Options
UrbanChain
/CD pipelines and engineering best practices Stay current with industry trends and recommend new technologies What We're Looking For Strong commercial experience with React, Next.js, Node.js, and JavaScript Solid understanding of back-end development and API design Experience working with cloud platforms (preferably AWS) Familiarity with both SQL and NoSQL databases (e.g. PostgreSQL, MongoDB) Understanding of Git, CI More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Full Stack Engineer

Manchester Area, United Kingdom
Hybrid / WFH Options
UrbanChain
/CD pipelines and engineering best practices Stay current with industry trends and recommend new technologies What We’re Looking For Strong commercial experience with React, Next.js, Node.js, and JavaScript Solid understanding of back-end development and API design Experience working with cloud platforms (preferably AWS) Familiarity with both SQL and NoSQL databases (e.g. PostgreSQL, MongoDB) Understanding of Git, CI More ❯
Posted:

Senior UI Developer

London, UK
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: A degree in computer science, software engineering, or a related field Proficiency in React.js and its core principles Strong JavaScript, TypeScript HTML5, and CSS3 skills Experience with popular React.js workflows (such as Redux) Familiarity with RESTful APIs and integration Knowledge of modern authorization mechanisms, such as JSON Web Tokens Understanding More ❯
Employment Type: Part-time
Posted:

Senior UI Developer

London, UK
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: •A degree in computer science, software engineering, or a related field •Proficiency in React.js and its core principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding More ❯
Posted:

Senior Software Engineer (.Net)

United Kingdom
Hybrid / WFH Options
Primis
Frameworks : C#, .NET Core Architecture : Event-driven, service-oriented Cloud & Infrastructure : Azure (or AWS), Infrastructure-as-Code Data & Integration : SQL, caching, message brokers (e.g., RabbitMQ) Front-End : HTML, CSS, JavaScript Engineering Practices : CI/CD, Behaviour-Driven Development, modern agile workflows Who We’re Looking For: Senior Engineers : 5+ years building enterprise-grade systems; strong with OO design, SOLID principles More ❯
Posted:

Senior UI Developer

City of London, Greater London, UK
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: A degree in computer science, software engineering, or a related field Proficiency in React.js and its core principles Strong JavaScript, TypeScript HTML5, and CSS3 skills Experience with popular React.js workflows (such as Redux) Familiarity with RESTful APIs and integration Knowledge of modern authorization mechanisms, such as JSON Web Tokens Understanding More ❯
Employment Type: Part-time
Posted:

Senior UI Developer

London Area, United Kingdom
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: •A degree in computer science, software engineering, or a related field •Proficiency in React.js and its core principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding More ❯
Posted:

Senior UI Developer

City of London, Greater London, UK
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: •A degree in computer science, software engineering, or a related field •Proficiency in React.js and its core principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding More ❯
Posted:

Senior UI Developer

South East, United Kingdom
Apexon
code reviews to maintain code quality and consistency Qualifications & Skills: •A degree in computer science, software engineering, or a related field •Proficiency in React.js and its core principles •Strong JavaScript, TypeScript HTML5, and CSS3 skills •Experience with popular React.js workflows (such as Redux) •Familiarity with RESTful APIs and integration •Knowledge of modern authorization mechanisms, such as JSON Web Tokens •Understanding More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior / Lead Shopify Developer

London, UK
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopify’s Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/ More ❯
Posted:

Senior / Lead Shopify Developer

London, UK
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopifys Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/Hydrogen More ❯
Employment Type: Part-time
Posted:

Senior / Lead Shopify Developer

City of London, Greater London, UK
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopify’s Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/ More ❯
Posted:

Senior / Lead Shopify Developer

City of London, Greater London, UK
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopifys Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/Hydrogen More ❯
Employment Type: Part-time
Posted:

Senior / Lead Shopify Developer

South East, United Kingdom
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopify's Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/ More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior / Lead Shopify Developer

London Area, United Kingdom
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopify’s Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/ More ❯
Posted:

Senior / Lead Shopify Developer

City of London, London, United Kingdom
Hybrid / WFH Options
Halian | Managed Services, Recruitment Agency & Contract Staffing
years specialising in Shopify/Shopify Plus in a senior or lead position. Deep understanding of Shopify’s Liquid templating language and theme architecture. Strong proficiency in HTML5, CSS3, JavaScript (ES6+), React/Vue , and modern front-end build tools (Webpack, Vite, etc.). Experience building custom Shopify apps using Node.js or Ruby on Rails . Familiarity with Headless/ More ❯
Posted: