1 to 25 of 193 ECMAScript Jobs in London

Full Stack Software Engineer

Hiring Organisation
Brio Digital
Location
London, Baker Street, United Kingdom
Employment Type
Contract
Contract Rate
£550/day
processes Ensure solutions meet security, performance and compliance standards Essential Skills & Experience Strong commercial experience with: C#/.NET Core/.NET 6+ Vue.js JavaScript/TypeScript REST API development and integration SQL Server and relational databases Hands-on experience with Microsoft Azure, including services such as: App Services Azure ...

Software Engineer (AI+Fullstack)

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£55,000
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 ...

Full Stack Developer (Node/React)

Hiring Organisation
ARC IT Recruitment
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 60,000 Annual
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 ...

Software Engineering Manager - UCX (Web)

Hiring Organisation
Hargreaves Lansdown
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
essential , with a strong grasp of front-end design patterns and best practices. Proven hands-on software engineering background across modern web technologies, including JavaScript, HTML, CSS, and React-based frameworks . Strong understanding of modern front-end architecture, including state management, routing, navigation, performance optimisation, module federation, microservice architecture ...

Java Software Engineer

Hiring Organisation
Sanderson Recruitment
Location
South West London, London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £600 per day + Inside IR-35
development Git and version control Experience with relational and/or NoSQL databases Nice to have Exposure to Node.js and TypeScript Experience working with JavaScript-based frontends Azure DevOps or GitHub Actions Docker and Kubernetes Microservices architecture Messaging or event-driven systems Reasonable Adjustments: Respect and equality are core values ...

.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. ...

.NET Developer - Stansted

Hiring Organisation
Noir
Location
London Stansted Airport, Stansted, Essex, England, United Kingdom
Employment Type
Full-Time
Salary
£75,000 - £80,000 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, Azure Cosmos DB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban ...

.NET Developer, CMS, Sitecore, EpiServer, Umbraco

Hiring Organisation
Noir
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £75,000 per annum
such as Sitecore, Optimizely, Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity or dotnetnuke. Our client can provide you with industry recognised training in: .NET 10.0, 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 MongoDB. This ...

Power Platform Developer

Hiring Organisation
Emporia Consulting Group Limited
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
environment. Demonstrate strong experience working with Microsoft Dataverse, including data modelling, security roles, relationships, and solution configuration. Develop and customise solutions using C# and JavaScript, extending Dynamics 365 and Power Platform capabilities where required. Use HTML and CSS to support user interface customisation and styling. Work with Git code repositories ...

Senior Full Stack Developer (React & C#.NET)

Hiring Organisation
Adecco
Location
London, United Kingdom
Employment Type
Contract
collaborative environment and are eager to make an impact, we want to hear from you! Technical Skills Front-end: Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, and modern UI patterns, develop framework is essential - More to React JS and Java script Back-end: Expertise in C# .NET … RESTful APIs with a focus on scalability and resilience. Create UI Components: Craft responsive and modular UI components using React JS and modern JavaScript/TypeScript patterns. Collaboration: Work closely with business stakeholders and domain experts in Risk, Regulatory Reporting, and Finance. Power BI Expertise: utilise your knowledge of Power ...

Systems Architect

Hiring Organisation
Harvey Nash
Location
London, United Kingdom
Employment Type
Permanent
senior stakeholders. Key Skills: Enterprise & Solution Architecture AWS/Cloud-Native Platforms Microservices & APIs DevOps, CI/CD & Infrastructure as Code Java, C#, TypeScript, JavaScript, or C++ Financial Services, Capital Markets, Trading Platforms, or Front Office systems experience Desirable: Kubernetes, Docker, and modern distributed architectures You'll play ...

Full Stack Developer - Active SC, NPPV3, Java

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Stack Developer within the Public Sector. Active SC and NPPV3 Clearance. Senior-level expertise in either Java/Spring (Boot, Data JPA, Security) or JavaScript/TypeScript with React; mid-level experience acceptable in the other Proven experience delivering high-quality, cross-functional solutions using microservices and micro-frontend architectures ...

Software Engineering Specialist

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£605/day
based environments Strong focus on automation and continuous improvement Good collaboration and problem-solving skills Technical Experience (some of): Programming/scripting (Python, Java, JavaScript, etc.) CI/CD tools (GitLab, Jenkins) IaC (Terraform, Ansible) Containers (Docker, Kubernetes) Cloud (AWS, Azure, GCP) Observability (Prometheus, Grafana, ELK) Git/source control ...

Microsoft Power Platform Developer (Copilot Studio Experience)

Hiring Organisation
Crowe UK
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
pipelines (Azure DevOps or GitHub) Source control Ability to write and optimise expressions, formulas, and logic within Power Platform tools Basic knowledge of: JavaScript/TypeScript (for extensions) JSON and API integrations Understanding of: Generative AI grounding and data sources Prompt design and conversation design best practices Managing fallback, escalation ...

SENIOR SOFTWARE DEVELOPER – EDINBURGH OR LONDON

Hiring Organisation
Max Fordham LLP
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £60,000 per annum
below are the technology stacks that Max Fordham use. The successful candidate will be expected to work with the following core technologies: Programming: Python, JavaScript, TypeScript, SQL, C#, C++ Frameworks & Tools: FastAPI, Jupyter, JupyterHub, Voila, Power BI, GitHub, Vue, Nuxt AEC Platforms & Standards: Revit, Revit API, pyRevit, Rhino, Grasshopper ...

Senior Dynatrace Consultant

Hiring Organisation
NETbuilder
Location
Greater London, England, United Kingdom
automation Broader observability tooling knowledge advantageous: Splunk, Elastic, Datadog, Cribl Application-stack and programming awareness advantageous: Java and/or .NET, web technologies (JavaScript), SQL/relational databases, and distributed/microservices architectures (J2EE, .NET, microservices) Strong client management — comfortable with senior stakeholders and able to challenge constructively Direct line ...

Principal Artificial Intelligence (AI) Platform Engineer/Architect

Hiring Organisation
WTW
Location
Greater London, United Kingdom
Employment Type
Full Time
model and tooling landscape Azure/Microsoft ecosystem experience advantageous but not mandated Technical Skills Proficiency in a range of languages, including Python, C#, JavaScript, or TypeScript Experience with modern development practices (CI/CD, testing frameworks, containerization) Extensive experience with cloud infrastructure (AWS, Azure, or GCP) and managed services ...

Web Developer Trainee

Hiring Organisation
ITOL Recruit
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£29,000 - £35,000 per annum
move forward. Step 2 - Online Training The second step includes a selection of more advanced courses to get you up to speed. React-js JavaScript JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python is highly versatile. ...

Java Developer - Active SC, NPPV3, Java

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Java Developer within the Public Sector. Active SC and NPPV3 Clearance. Senior-level expertise in either Java/Spring (Boot, Data JPA, Security) or JavaScript/TypeScript with React; mid-level experience acceptable in the other Proven experience delivering high-quality, cross-functional solutions using microservices and micro-frontend architectures ...

Senior PHP Developer

Hiring Organisation
Profectus Recruitment
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£75,000 - £85,000 per annum
ongoing modernisation initiatives across the technology estate Technical Environment: PHP (v8+) Laravel/Symfony/Yii2 Azure PaaS Azure Functions REST APIs/GraphQL JavaScript/HTML/CSS MySQL/PostgreSQL Git/CI/CD Linux (CentOS/RedHat) Azure-native tooling and integrations The Ideal Background: Strong ...

Lead Intelligent Automation & Low-Code Developer (Power Platform & Copilot)

Hiring Organisation
TEN10 SOLUTIONS LIMITED
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Power Platform and/or Copilot. Previous RPA experience ( UiPath, Power Automate Desktop, Blue Prism, Automation Anywhere ). Knowledge of coding languages ( e.g., .NET, JavaScript, Python ) to extend low-code solutions Experience integrating Power Platform with Azure AI s ervices or other enterprise systems Whats ...

Senior Data Engineer (Senior Data Manager)

Hiring Organisation
NHS England
Location
Leeds/London, LS1 4AP, United Kingdom
Salary
£57528.00 to £64750.00
Data Warehouses (e.g Azure, AWS, GCP) including languages such as Python, SQL, PySpark, Java Knowledge and experience with programming languages such as React, Typescript, Javascript is desirable. Skills and Experience Essential Able to design appropriate solutions with autonomy Leads delivery of components or workstreams Applies testing, CI/ ...

Web Developer Trainee

Hiring Organisation
ITOL Recruit
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£30,000 - £45,000 per annum
move forward. Step 2 - Online Training The second step includes a selection of more advanced courses to get you up to speed. React js JavaScript JavaScript forms the foundation of almost everything you see on the Internet, so it will be essential! Python is highly versatile. ...

Software engineering specialist

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600/day
operations teams. What You'll Need We are looking for a mix of some or all of the following: Development: Experience with Java, Python, JavaScript, C++, or C#. Cloud & Containers: Cloud-native platforms (AWS, Azure, GCP) and Kubernetes/Helm. CI/CD & IaC: GitLab, Jenkins, Terraform, or Ansible. Data ...

C#.Net Developer

Hiring Organisation
Boston Hale
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £75,000 per annum
resilient systems Excellent communication skills - able to engage directly with business users Comfortable working autonomously and taking ownership & initiative Desirable: Angular or another modern JavaScript framework Financial services exposure (though strong engineers from other sectors are welcomed) Experience within Agile/Jira environments (pragmatic delivery mindset essential) This ...