326 to 350 of 634 JavaScript Jobs in London

Agent Engineer

Location
Greater London, England, United Kingdom
agent‐instruction design skills. Experience integrating APIs and business systems. Familiarity with large language models, agent frameworks and tool use. Programming experience in Python, JavaScript or a comparable language. Understanding of structured and unstructured data sources. Strong analytical, debugging and problem‐solving skills. Ability to prototype rapidly and convert successful ...

Engineering Manager

Location
Greater London, England, United Kingdom
technical trade-offs. Comfortable with structured planning, performance management, and aligning engineering efforts with company objectives. Familiarity with distributed systems and large-scale JavaScript codebases is a bonus. Why we think you’ll enjoy it here: Competitive base salary DOE Fully remote working with occasional travel. 25 days annual leave ...

Visual Data Journalist - Interactive & Graphics Specialist (6 Month FTC)

Location
Greater London, England, United Kingdom
turn around rapid-response visual assets under tight deadlines. What we're looking for from you: Front-End Development: Fluent in HTML, CSS, JavaScript, and modern visualisation frameworks (such as D3.js, Svelte, React, or Leaflet/Mapbox). Data Wrangling: Expert knowledge of Python or R for scraping, cleaning, structuring ...

Software Developer (.Net , C# , Event Sourced Architecture)

Hiring Organisation
Matchtech
Location
London, United Kingdom
Employment Type
Permanent
Salary
£45000 - £55000/annum Hybrid / Remote working
well-tested software within .NET environments Designing and implementing components that support wider product functionality Developing front-end applications using Angular, TypeScript and JavaScript Building and maintaining APIs, internal libraries and development tooling Supporting existing platforms, investigating issues and providing effective resolutions Creating test and integration plans and contributing … within an Agile Kanban environment Job Requirements: Strong software development skills within .NET environments, including C# Experience developing applications with Angular, TypeScript, Jasmine and JavaScript Knowledge of Python and experience developing APIs Understanding of SQL and Influx databases Experience with event-sourced architectures and cloud technologies, particularly Microsoft Azure Ability ...

Senior Data Scientist — ML in Production (Waterloo)

Location
Greater London, England, United Kingdom
applications across key sectors for an Enterprise AI client. The candidate should have a mix of data science and software engineering skills, including Python, JavaScript, Java, and experience deploying to cloud platforms. #J-18808-Ljbffr ...

London Client Solutions Engineer — Drive Ad Tech

Location
Greater London, England, United Kingdom
activations and complex implementations. You will collaborate with clients, account teams, engineering and product management, documenting best practices, and guiding product usage. Proficiency in JavaScript, HTML5, CSS, XML, and SQL is preferred, with strong communication and problem-solving skills. #J-18808-Ljbffr ...

Senior Web Engineer – Python, Django & React

Location
Greater London, England, United Kingdom
work across front and back ends, ensuring scalability and reliability for millions of requests per day. The role requires strong Python and JavaScript skills, Django experience, and a passion for code quality, testing, and automation. A hybrid London/remote setup is available with collaboration across teams. #J-18808-Ljbffr ...

Senior AI Engineer - End-to-End AI Solutions & Cloud

Location
Greater London, England, United Kingdom
lifecycle from concept through production. You will implement robust software and AI solutions in a collaborative, fast-paced setting. You will code in Python, JavaScript/TypeScript, and Go, work with REST APIs and databases, and contribute to scalable, security-conscious AI systems within a supportive team. #J-18808-Ljbffr ...

Senior React Engineer - Financial Markets Platform

Location
Greater London, England, United Kingdom
experienced front-end developer to build scalable web and desktop tools for traders and market operators. You'll design and implement apps using JavaScript, TypeScript and React, integrate with Python APIs, and work with CI/CD and testing to ensure quality and reliability. The role emphasizes ownership, collaboration with ...

Senior Node.js Front Engineer — Greenfield & APIs Remote

Location
Greater London, England, United Kingdom
Harrington Starr is seeking a Senior/Lead Software Engineer to develop front office applications using JavaScript, Node.js, React and TypeScript. This role is London-based with remote work options, offering a base salary up to £120,000 and a strong bonus/benefits package. You will work closely with ...

Java Engineer, AI Model Training & Code Evaluation

Location
Greater London, England, United Kingdom
models, collaborating closely with researchers. This includes curating code examples, providing precise solutions, and making corrections primarily in Java, as well as in Python, JavaScript (including ReactJS), C/C++, Rust, and Go; evaluating and refining AI-generated code for efficiency, scalability, and reliability; and working with #J-18808-Ljbffr ...

Senior PHP Web Developer - Zend, MySQL, Drupal

Location
Greater London, England, United Kingdom
building productive relationships with clients. Ideal candidates will have a minimum of 3 years’ web development experience, be proficient in HTML, CSS, and JavaScript, and possess strong interpersonal skills. The agency offers a supportive work culture and opportunities for career growth. #J-18808-Ljbffr ...

Hybrid Full-Stack Dev (React/Node, AWS) - DV Cleared

Location
Greater London, England, United Kingdom
London. The role is hybrid, with three days onsite, delivering secure, cloud-based knowledge platform solutions. You will work across the stack using JavaScript, React and Node.js, with AWS-based cloud delivery as a focus. You will collaborate with engineers and delivery stakeholders in a controlled environment, taking ownership ...

Senior QA Automation Engineer - AI-Driven API & CI/CD

Location
City Of London, England, United Kingdom
Platform. The role focuses on test automation, API testing, client onboarding support, and production readiness within a fast-paced technology group. You’ll leverage JavaScript/TypeScript, Cypress, and various API testing tools, while integrating AI-assisted QA approaches to improve coverage and efficiency. collaboration with project teams is essential. ...

Technical Lead & Cloud Solutions Architect

Location
Greater London, England, United Kingdom
London, requiring expertise in designing scalable web and mobile solutions. The ideal candidate will have strong skills in AWS and various programming languages, including JavaScript, CSS, and .NET tools. Strong communication skills and experience in Agile methodologies are essential for success in this collaborative role. #J-18808-Ljbffr ...

C# .NET & SQL Reporting Specialist (6-Month Contract)

Location
City Of London, England, United Kingdom
management teams, and aiding the introduction of new IT software and architecture. Required skills include C# .NET, ASP.NET, SQL, HTML/CSS and JavaScript; GIS and BI tools are #J-18808-Ljbffr ...

AI Agent Engineer — Production & Platform Builder

Location
Greater London, England, United Kingdom
from day one. You should have 3+ years of software engineering or technical delivery, hands-on with LLMs and prompts, and fluency in Python, JavaScript/TypeScript, Java, or Apex. Occasional travel ~25% is expected. #J-18808-Ljbffr ...

Hybrid Software QA Tester | Web & Mobile | Career Growth

Location
Greater London, England, United Kingdom
releases. The ideal candidate will have QA experience, strong QA methodologies understanding, and familiarity with Selenium or Cypress; knowledge of Python/TypeScript/JavaScript/Node.js/Golang and databases #J-18808-Ljbffr ...

Senior Lead Software Engineer - AI-Enabled Secure Cloud

Location
Greater London, England, United Kingdom
development adoption, enforce secure coding and automated testing, and serve as a subject-matter expert across the SDLC. The role requires strong Java and JavaScript capabilities and hands-on cloud-native experience to deliver scalable solutions. #J-18808-Ljbffr ...

Lead Full-Stack Engineer & AI Innovation Architect

Location
Greater London, England, United Kingdom
Capgemini is hiring a highly capable Full-Stack JavaScript/TypeScript engineer in London hybrid roles. You will work with innovation consultants, UX/UI designers and engineers to shape opportunities using emerging tech, leading projects from discovery to pilot, and delivering scalable solutions that balance speed and quality ...

Full Stack Software Developer – City London

Location
City Of London, England, United Kingdom
start up environment with experience of taking a SAAS product through a full build and ship cycle. Information Technology Skills Required: Angular 2, Javascript, AWS, GIT, Front end development, PHP, JSON Location is City London Must have a first degree. Salary will be dependent upon experience – in the range ...

Frontend Developer

Location
Greater London, England, United Kingdom
development, testing, and documentation. Contribute to shared libraries, internal tools, and reusable UI components. Requirements 2–4 years of experience building applications with JavaScript, React, and TypeScript. Solid understanding of core front-end principles, including component-driven development, state management, and application performance. Familiarity with modern build tools and bundlers ...

Back-end Developer

Location
Greater London, England, United Kingdom
knowledge of programming languages include Python, PHP, Ruby, and Java Working familiarity with the cms framework Knowledge of front-end programming languages (e.G. Html, javascript and css) Outstanding analytical and time management abilities Teamwork abilities and a willingness to solve problems BSc degree in Computer Science or relevant #J ...

ServiceNow Developer

Location
London, United Kingdom
Working directly with stakeholders to understand requirements and deliver effective technical solutions What We're Looking For Strong hands-on ServiceNow development experience Solid JavaScript skills Experience with ServiceNow workflows and automation REST/SOAP integration experience Knowledge of ITSM processes and CMDB Strong communication and stakeholder management skills Desirable ...