1 to 25 of 990 ECMAScript Jobs

Senior Developer

Hiring Organisation
Reed.co.uk
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 per annum
software development experience, with at least 3 years in a senior or technical lead role. Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development ...

Senior Software Engineer

Hiring Organisation
Oscar Technology
Location
Leeds, West Yorkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
Core Solid front-end development experience with Angular and/or React Experience with Entity Framework/Entity Framework Core Knowledge of HTML, CSS, JavaScript/TypeScript Familiarity with REST APIs , Git , and modern development workflows Experience or strong interest in AI technologies (e.g., OpenAI APIs, ML integrations) Nice ...

Analytics Application Engineer/Developer

Hiring Organisation
Mercer
Location
Lisboa, Portugal
Employment Type
Permanent
Salary
EUR Annual
Kubernetes, or similar). Possess strong programming skills, knowledge of data warehousing and visualization tools Develop clean, responsive, and accessible UIs using: HTML5, CSS3, JavaScript/TypeScript React Optimize front-end performance for speed and scalability Experience Required: Bachelor's degree in Computer Science, Software Engineering, or related field ...

Full Stack Developer (.NET / C# / React)

Hiring Organisation
Legado (joinlegado.com)
Location
Edinburgh, Scotland, United Kingdom
taking. Tech Stack Back-End .NET/.NET Core C# ASP.NET REST APIs SQL (Azure SQL) Azure hosting & services Front-End React TypeScript/JavaScript HTML5/CSS3 Infrastructure & DevOps Azure DevOps Pipelines CI/CD Secure cloud environments Modern Tooling AI-assisted development (Claude, GitHub Copilot etc.) Automated testing ...

Senior Software Engineer

Hiring Organisation
Low Carbon Contracts Company
Location
East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
from the roadmap. Solve ambiguous problems with scalable solutions. Skills Knowledge and Expertise Essential: Strong expertise in Python web development frameworks (e.g., Django) and JavaScript/TypeScript, with experience working in cloud environments such as AWS, Azure, or GCP. Skilled in applying software technical design principles to build scalable, secure ...

Senior Software Engineer

Hiring Organisation
Low Carbon Contracts Company
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
from the roadmap. Solve ambiguous problems with scalable solutions. Skills Knowledge and Expertise Essential: Strong expertise in Python web development frameworks (e.g., Django) and JavaScript/TypeScript, with experience working in cloud environments such as AWS, Azure, or GCP. Skilled in applying software technical design principles to build scalable, secure ...

Product Engineer - AI, Cloud (Innovation Labs)

Hiring Organisation
Serve Legal
Location
United Kingdom
Collaborative Spirit – works fluidly with data scientists, commercial teams, and ops leaders. Hard Skills Required • Software Engineering: Strong in at least one modern language (JavaScript/TypeScript, Java, Python) • Web & Product Development: Frameworks (React, Node.js, Django/Flask) • AI, GenAI and LLMs: OpenAI, Gemini, Grok, Llama • Agentic AI: Frameworks (langchain ...

Java Fullstack Developer

Hiring Organisation
Randstad Digital
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£80,000
enjoy owning the full development lifecycle - we want to hear from you. Essential Skills & Experience Strong proficiency in Java (mandatory) Solid experience with JavaScript, HTML, and CSS Hands-on experience with Spring/Spring Boot Experience with modern front-end frameworks such as React, Angular, or Vue Strong understanding ...

Web Developer - C#

Hiring Organisation
CV Screen Ltd
Location
Erith, Kent, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£50,000
Required At least 3 years' experience in C# and .NET development with strong OOP knowledge Solid front-end skills including HTML5, CSS3 and JavaScript/TypeScript, plus a modern framework (e.g. React, Angular or Blazor) Experience with SQL databases, RESTful APIs and software testing practices Salary & Benefits Salary ...

Software Engineer

Hiring Organisation
Low Carbon Contracts Company
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£70,000
solving supports overall team and business priorities. Skills Knowledge and Expertise Essential Hands-on experience in Python and web-development framework(e.g., Django) and JavaScript/TypeScript, ideally in cloud environments such as AWS, Azure or GCP. Strong understanding of core software engineering principles. Experience with CI/CD pipelines ...

Full Stack Engineer

Hiring Organisation
Randstad Digital
Location
Manchester Area, United Kingdom
enjoy owning the full development lifecycle — we want to hear from you. Essential Skills & Experience Strong proficiency in Java (mandatory) Solid experience with JavaScript, HTML, and CSS Hands-on experience with Spring/Spring Boot Experience with modern front-end frameworks such as React, Angular, or Vue Strong understanding ...

Software Engineer

Hiring Organisation
Gold Group
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
form of IaC, CI/CD and test automation. Extra info: Expert knowledge of current Java. Proficient in another language such as Python, C++, JavaScript, TypeScript, React. Advanced knowledge of AWS Services such as EC2, EKS, Fargate, IAM, S3, Lambda. Advanced knowledge of CI/CD software pipelines for Cloud ...

ASP.Net Developer

Hiring Organisation
Ascent Sourcing Ltd
Location
Ulverston, Cumbria, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 per annum
with colleagues. Essential Skills/Qualifications: Microsoft .Net (including Core, WebAPI, Kestral) C# Azure DevOps, Git, CI/CD pipelines (Azure DevOps, GitHub Actions) JavaScript/TypeScript, HTML, CSS Entity Framework Core, Microsoft SQL Server Strong problem-solving skills and curiosity Solid ICT knowledge (MS Office) Excellent communication and numeracy ...

ASP.Net Developer

Hiring Organisation
Ascent Sourcing Ltd
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 per annum
with colleagues. Essential Skills/Qualifications: Microsoft .Net (including Core, WebAPI, Kestral) C# Azure DevOps, Git, CI/CD pipelines (Azure DevOps, GitHub Actions) JavaScript/TypeScript, HTML, CSS Entity Framework Core, Microsoft SQL Server Strong problem-solving skills and curiosity Solid ICT knowledge (MS Office) Excellent communication and numeracy ...

Solutions Architecture & Engineering Lead

Hiring Organisation
Bison Bank
Location
Lisboa, Portugal
Employment Type
Permanent
Salary
EUR Annual
Strong knowledge of software architecture and distributed systems design. Experience with API driven architectures, microservices, integration layers, or event driven systems. Proficiency in Python, JavaScript (React, Angular), .NET, or Java. Understanding of secure web application practices: OAuth2, JWT, OWASP. Experience with Next.js, React, or React Native (considered a differentiator). ...

Software Team Lead

Hiring Organisation
Zenovo
Location
North Bristol, Nibley, Gloucestershire, United Kingdom
Employment Type
Permanent
Salary
£75000 - £85000/annum Up to £85,000 (Depending on Experien
culture of ownership, collaboration, and continuous improvement Skills & Experience Technical 5+ years of commercial software development experience Strong proficiency in Python & Java, or JavaScript/TypeScript Full-stack experience, ideally with React on the frontend and REST APIs backed by relational databases (e.g. PostgreSQL) Experience working with cloud platforms ...

Java Developer (Full Stack)

Hiring Organisation
RP Recruitment Ltd
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Work From Home
like Flask. Implement best practices in software development, including exception handling, data structures, and object-oriented programming (OOP). Front-end development using VueJS, JavaScript, CSS, and HTML to create seamless user interfaces. Develop and optimize SQL databases, ensuring efficient data storage and retrieval. Utilize AWS Core services and Terraform ...

Frontend Developer

Hiring Organisation
Capua
Location
Warwickshire, England, United Kingdom
building end-to-end applications through university projects, internships, placements, or personal work. Strong grounding in logical thinking and structured problem solving. Understanding of JavaScript/TypeScript and modern React development. Familiarity with state management and data-fetching approaches such as React Query, Zustand, or Redux. Awareness of UX principles ...

Senior Front-End React/Next.js Developer

Hiring Organisation
Coolblue
Location
Rotterdam, Zuid-Holland, Netherlands
Employment Type
Permanent
Salary
EUR Annual
Computer Science or a comparable field.You have advanced experience with TypeScript and React.js/Next.js concepts.You have extensive experience with modern JavaScript (ES2017+), HTML, and CSS/SCSS.You are highly proficient with React.js and Next.js.You have experience with a Back-End runtime environment such as Node.js or C# (.NET ...

Desenvolvedor full stack

Hiring Organisation
Closer Consulting
Location
Lisboa, Portugal
Employment Type
Permanent
Salary
EUR Annual
3+ years of professional development experience. Previous experience designing and developing for the cloud is a plus. Experience in front-end web development, including JavaScript, TypeScript, NodeJS, web standards, and modern frameworks (React.js/redux or Angular) Experience in HTML5 and CSS3, based on a responsive design. Good understanding ...

Application Developer

Hiring Organisation
Saga Travel
Location
Folkestone, Kent, South East, United Kingdom
Employment Type
Permanent
Salary
£45,000
Ideal Candidate You will have already worked as an Application Developer with proven experience in React and .NET. Additional experience with c#, HTML, JavaScript and CSS would of advantage. Ideally, you would have experience in working on a digital customer-facing platform, although we are open to candidates with relevant ...

Full Stack Engineer

Hiring Organisation
ADVANS Group
Location
Lisboa, Portugal
Employment Type
Permanent
Salary
EUR Annual
pipelines. Document features and contribute to design discussions. What we are looking for : 3+ years of experience in software development. Strong skills in JavaScript/TypeScript, React.js, Node.js, HTML5, CSS3. Solid knowledge of .NET (C#, .NET Core) and backend fundamentals. Familiarity with testing, CI/CD tools (GitLab), and Agile ...

Full Stack Developer (Python)

Hiring Organisation
RP Recruitment Ltd
Location
Leeds, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent
Core Python and frameworks such as Flask Apply best practices: OOP, exception handling, and efficient data structures Build responsive front-end interfaces using Vue.js, JavaScript, HTML, and CSS Design and optimize SQL databases for performance and reliability Manage cloud infrastructure using AWS Core services and Terraform Implement serverless architectures ...

Senior Full Stack Developer

Hiring Organisation
Erin Associates
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£55,000
/CD pipelines and cloud-based deployments. Key Skills & Experience 5+ years commercial experience with TypeScript/React and Node.js. Proficiency in JavaScript libraries such as React or Next.js. Expert knowledge of REST API development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure ...

.NET Developer

Hiring Organisation
Noir
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £90,000 per annum
application development (.NET Core, C#) or winforms/WPF (C#) development. Our client will provide you with training into: .NET 10.0, WPF, MVVM, Prism, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and Azure SQL. ...