276 to 300 of 300 ECMAScript Jobs in London

experienced JavaScript Developer we have a new position we would like to discuss with you. Please note this role requires 5 days per week onsite in Upminster, Essex. You will lead the development and management of a portfolio of websites that support marketing campaigns, client acquisition, and partner integrations. This … marketing team to improve tracking, conversion performance, and campaign delivery across multiple brands and affiliate channels. Essential Skills & Experience Strong experience with CSS3, JavaScript, and React. Experience with Back End development and SQL databases. Experience implementing REST APIs and working with JSON/XML data formats. Experience with Google Analytics ...

into technical tasks and be responsible for having discussion with business stakeholders and product Work with the following tech/tools/methodology; Java, JavaScript, HTML, CSS, TDD, Agile, pair programming, Bitbucket, Bamboo Qualifications Experience in the Salesforce platform Apex, Aura/LWC, Visualforce development with a strong understanding … development best practices Knowledge in JavaScript, HTML, CSS and understanding of CI/CD, REST API Experience working with Salesforce CPQ, Salesforce Billing, Revenue Recognition Certinia Financial Management and Accounting(Desirable) Additional Information Were a community here that cares as much about your life outside work as how you feel ...

Title – JavaScript Engineer Client – Fintech Start-Up (Trading) Rate - Up to £130,000 + Bonus Location – London About the Company: Our client is a rapidly growing fintech start-up building next-generation technology for the FX and cryptocurrency trading markets . Their platform powers modern, high-performance trading infrastructure used … develop your technical skills while contributing to systems that are actively used within global financial markets. Requirements : 1–4 years of experience working with JavaScript in a professional environment. Experience with modern front-end frameworks such as React or Angular . Strong understanding of front-end fundamentals , including component-based ...

Role Details Job Title: 1IM Developer Work Mode: 100% remote Role Description Deutsche Bank Identity Governance Administration (IGA) is managed on 1IM application. TCS provides CTB & Prod Ops and manages end-to-end service. Key ...

Role: KDB Developer Location: London Rates : Flexible Start Date: ASAP About the role: The successful candidate will be an experienced ‘hands on’ KDB developer. Prior experience of distributed systems and statistical analysis is desired. The ...

Senior Full Stack JavaScript Developer Salary: £80,000 - £88,000 pa (depending on experience) plus benefits, perks and healthcare options Location: Hybrid/2 x days per week - Travel to London Job Type: Permanent Security Clearance: This role is exclusively open to UK sole nationals who either hold ...

Developer (PHP/Javascript/Wordpress) London Salary - circa £30,000 to £40,000 + 10% bonus A successful, large-scale engineering business in London is urgently seeking a new Web Developer to join its team and take ownership of all corporate website development across the group. You will lead … design, development, and maintenance of multiple company websites in a mix of PHP, Javascript and Wordpress. Responsible for bringing your own creativity and ideas to enhance the process. They are a fun company to work for, offering a good work/life balance, regular team social events, summer parties ...

backed by a global leader in the digital marketing space. The ideal candidate will be a Full Stack Engineer with experience with JavaScript, TypeScript, MongoDB, React and Node.js and are happy to work fully remote. THE ROLE: Design, deploy and maintain clean code Build scalable backend services in Node.js … maintain relational and document databases in PostgreSQL and MongoDB Troubleshoot all systems to ensure a smooth implementation THE PERSON: Full Stack Experience Familiar with JavaScript, TypeScript, MongoDB, PostgreSQL, Node.js and React Ability to work fully remote REFERENCE: BBBH24495 Keywords: Outside IR35, Remote, Software Developer, Software Engineer, JavaScript, Cloud, Remote, Contract ...

Title: Senior JavaScript Developer (Full Stack) Location: London (3 days per week in the office) Salary: £80,000 – £100,000 About the Role This is a product-first HR tech company founded in 2020. They’re building modern infrastructure for HR teams, automating repetitive work so people teams can focus … high-impact, strategic initiatives. As a Senior JavaScript Developer, you’ll join a high-calibre engineering function (around 20 engineers across 5 small squads) working across two core products: - Core HR platform: the central HRIS orchestration layer with a strong focus on integrations - AI automation platform: an agentic AI product ...

Responsibilities Design, develop, and maintain software applications for public sector clients Write clean, efficient, and well-documented code Work primarily with C# and JavaScript to build modern, secure systems Collaborate with technical and non-technical stakeholders to deliver solutions that meet user needs Participate in code reviews and ensure adherence … Contribute to continuous improvement of development processes and standards Requirements: Strong experience in software development, with a focus on coding Proficiency in C# and JavaScript Solid understanding of software engineering principles and best practices Experience writing and maintaining production-quality code Ability to work independently and as part ...

Quality Engineer. Proven experience automating performance and functional testing. Solid experience with API automation and verification. Proficient in programming languages such as Python, JavaScript, or Node.js. Practical hands-on experience with modern automation tooling. Exposure to testing data-driven applications and distributed systems. Desirable: Experience testing GenAI or LLM-based … services. Background in supporting ML, NLP, or data-heavy engineering environments. Familiarity with validating prompt flows, LLM responses, or AI pipelines. Tech Environment: Python, JavaScript, Node.js Performance automation tools API testing frameworks GenAI & LLM ecosystems (open-source + proprietary models) Agile/Scrum delivery Join our client's team ...

Join a leading Banking technology and services provider as a KDB Developer! Job Overview An exciting opportunity for an experienced and hands-on KDB Developer to join a global technology team. You will work closely ...

I’m working with one of our financial services client based in the London, and they’re looking for a " AI Augmented Engineering Lead " to join their team. The ideal candidate: Enjoys experimentation and has ...

Senior Solutions Engineer - SaaS FinTech/Payments UK, Remote Scalers HQ is proud to be partnering with an innovative SaaS FinTech & Payments business in the UK. The SaaS platform our client has built takes away ...

Developer to help develop immersive, interactive 3D digital twin experiences used across web and mobile applications. You'll work with modern technologies including Python, JavaScript, and TypeScript. What you'll do: Build immersive 3D digital twin models that power engaging experiences across web and mobile applications Build interactive virtual tour … features using Python, JavaScript, and TypeScript Optimise models for fast rendering and smooth performance across devices Ensure accuracy, scalability, and consistency across the digital twin pipelines Nice to have: Building agents/multi-agent systems Developing Retrieval-Augmented Generation (RAG) systems Agentic frameworks: LangGraph/LangChain Deployed LLMs at enterprise ...

cleared Data Scientist to join a high-performing technology team. This role requires strong hands-on experience across Google BigQuery , DataForm , JavaScript procedures , Python , statistics , and data modelling . You will work with complex datasets to build analytical models, transform and structure data, and generate insight to support operational … responsibilities: Build and maintain analytical and data models Use BigQuery to query, manage, and optimise large datasets Develop data transformation workflows using DataForm and JavaScript procedures Apply Python for analysis, modelling, and automation Use statistical techniques to identify patterns, trends, and insights Translate business questions into clear analytical outputs Work ...

development standards Develop custom Craft CMS templates, fields, and components Collaborate with designers to implement responsive, accessible front-end solutions Work with PHP , Twig , JavaScript , and Bootstrap to deliver high-quality user experiences Set up, configure, and support hosting environments, including: Craft CMS Hosting Cloud platforms such as Google Cloud … performance standards (e.g. WCAG awareness) Required Skills & Experience Commercial experience working with Craft CMS (2+ years preferred) Strong working knowledge of: PHP Twig JavaScript Bootstrap (or similar CSS frameworks ...

well-established software platform? Do you thrive in an environment where your deep understanding of core PHP is valued, and you enjoy working with JavaScript and Bootstrap? If so, we want to hear from you! Our client, a leader in their field, is seeking a talented PHP Web Developer … procedural PHP. Writing clean, well-documented, and efficient code. Collaborating with the development team on various projects. Troubleshooting and debugging existing applications. Working with JavaScript and Bootstrap to enhance user interfaces and experience. Contributing to all phases of the development lifecycle. Skills & Experience Extensive commercial experience in procedural PHP development. ...

Salesforce Commerce Cloud B2C Contribute to development on Salesforce Core (Sales/Service Cloud) Implement integrations via APIs (standard and custom) Work with JavaScript, ISML, controllers and storefront components Participate in solution design, development, deployment, and documentation Collaborate with product, business, and technical teams Ensure code quality, testing, and best … WHAT WE ARE LOOKING FOR 4–7 years of experience in Salesforce development Strong experience in Salesforce Commerce Cloud B2C (SFRA) Good knowledge of JavaScript and storefront development Experience with API integrations Experience with ISML Experience with GIT Experience or exposure to: Salesforce Core (Sales Cloud/Service Cloud) Apex ...

Salesforce Commerce Cloud B2C Contribute to development on Salesforce Core (Sales/Service Cloud) Implement integrations via APIs (standard and custom) Work with JavaScript, ISML, controllers and storefront components Participate in solution design, development, deployment, and documentation Collaborate with product, business, and technical teams Ensure code quality, testing, and best … WHAT WE ARE LOOKING FOR 4–7 years of experience in Salesforce development Strong experience in Salesforce Commerce Cloud B2C (SFRA) Good knowledge of JavaScript and storefront development Experience with API integrations Experience with ISML Experience with GIT Experience or exposure to: Salesforce Core (Sales Cloud/Service Cloud) Apex ...

WordPress Developer to join a fast-growing digital agency, where you will learn about headless CMS systems and build on skills with JavaScript frameworks. It would suit a developer who has focused on WordPress websites who is looking to build up their skills and work in a modern technical environment. … solutions, and look to integrate AI technologies and other innovative approaches. The main responsibilities will include: Translating Figma designs with modern HTML, Tailwind, JavaScript, Astro & NextJS Integrating content from headless CMS systems Designing responsive WordPress websites (working with Beaver Builder) Providing web support for clients It would suit ...

Customer Service Specialist -Essential Expereince • Strong hands-on experience with Dynamics 365 Customer Service • Solid understanding of Power Platform (Power Automate, Dataverse) • Strong JavaScript skills for CRM WebResources • Experience with WebAPI integrations • Ability Configure & customise Dynamics 365 Customer Service (solutions, dashboards, views, tables,) • Expereince of managing and developing CMS change … Insights. • Expereince of building automation flows using Power Automate to reduce manual tasks. • Good knowledge of Microsoft 365 administration (SharePoint, Teams) • Skills to develop JavaScript WebResources to extend CRM functionality and utilise WebAPI for integrations/data operations • Ability to maintain the Dynamics 365 Contact Center, including: Copilot Studio – build ...

This award winning integrated creative agency is looking for a Digital Designer to work with a client of theirs who is one of the world’s largest asset management companies. You will be working alongside ...

communication and practical problem solving. The Role and Deliverables Implement and maintain tags within Tealium IQ to support analytics and marketing needs. Write custom JavaScript to create and customise tagging solutions. Configure and test tracking in a Google Analytics environment. Troubleshoot tagging and data collection issues across web properties. Document … implementations and provide clear handover notes to internal teams. Your Skills & Experience Strong experience implementing tags using Tealium IQ tag management. Confident writing JavaScript for custom tag development and data layer logic. Solid understanding of Google Analytics configuration and event tracking. Ability to debug tagging issues using browser tools ...

data capability that continues to evolve and scale. The Role and Deliverables * Lead Tealium iQ implementations across high traffic consumer platforms. * Build and optimise JavaScript based tagging and personalisation solutions. * Work closely with product, data, and engineering teams to translate tracking requirements into actionable technical configurations. * Troubleshoot, refine, and enhance … documentation and ensure smooth knowledge transfer into internal teams. Your Skills and Experience * Strong experience implementing Tealium iQ solutions in complex digital environments. * Advanced JavaScript capability for custom tags, extensions, and personalisation logic. * Proven ability to manage and influence senior stakeholders across technical and non technical groups. * Strong implementation background ...