226 to 250 of 634 JavaScript Jobs in London

seeking a skilled and passionate Full-Stack Software Engineer with strong experience in C#/.NET Core and modern front-end technologies (React, JavaScript/TypeScript, HTML, CSS) to design, develop, and maintain robust APIs and user interfaces for our enterprise applications. The ideal candidate will be passionate about clean … development lifecycle. Collaborate with cross-functional teams to integrate APIs with frontend and backend systems. Build and maintain responsive, accessible user interfaces using React, JavaScript/TypeScript, HTML, and CSS. Optimize API performance and ensure scalability. Write unit and integration tests to ensure code quality. Participate in code reviews ...

Senior Software Engineer I (Java & JavaScript) at Elsevier. You will design and build scalable, high-performance authentication and authorization infrastructure, interfacing with identity providers and downstream APIs. The role involves mentoring others, participating in CI/CD, and delivering across Agile or Waterfall environments on AWS. You'll work within ...

innovator in AI-powered safety, seeks a Junior Software Engineer to help build and test its AI platform. You will begin with Python and JavaScript development, test automation, and CI/CD workflows on Azure, then expand into infrastructure reliability, monitoring, and performance optimization. You will join a team that ...

Elsevier is seeking an engineer to design and develop scalable, high-performance applications using Java, JavaScript, Node.js, and React. The role involves building a robust identity and access management platform, ensuring code quality, and participating in agile delivery with GitHub workflows. You will work on diverse data models, integrate with ...

Playwright, Selenium, Cypress or RestAssured, plus CI/CD pipelines. Experience in Agile environments (SCRUM/Kanban) and coding in Java, C#, TypeScript or JavaScript is desirable; eligibility for security clearance #J-18808-Ljbffr ...

many years with latest Oracle APEX versions and previous Oracle technologies. In depth knowledge of PL/SQL and technologies such as HTML, JQuery, Javascript, AJAX, CSS etc. Beneficial to have previous experience developing Oracle Forms and converting them to APEX. Role will include some mentoring of and skills transfer ...

portfolio of high-growth and enterprise merchants. Responsibilities Develop and maintain Shopify and Shopify Plus storefronts. Build custom themes using Liquid, HTML, CSS, JavaScript, and TypeScript. Develop Shopify apps, integrations, and custom functionality. Implement Shopify Functions, Checkout Extensions, and Online Store 2.0 features. Integrate Shopify with ERPs, CRMs, PIMs ...

constructive code reviews. Optimize application performance and ensure high availability. Requirements: 5+ years of professional experience in full-stack web development. Strong proficiency in JavaScript/TypeScript, React, Node.Js, and PostgreSQL. Experience working within an Agile/Scrum environment. Valid right to work in the United Kingdom. ...

Model Context Protocol, Agent‐to‐Agent and LLM selection (advantage). Software development experience, including proficiency in one or more of the following: Python, JavaScript, JSON, React and related scripting, .NET technologies (C#, ASP.NET), REST services, and PowerShell. Desirable: experience with Power Pages. EU Characteristics that can spell success ...

role, you will have at least five years of experience developing scalable frontend applications for B2B or enterprise environments. A strong technical background in JavaScript/TypeScript and React is essential, along with hands‐on experience using Three.js for 3D visualisation. Familiarity with AWS and Docker will also be highly ...

data sync and analytics* Write clean, tested code and help steer architecture decisions## What we're looking for* 3+ years with React and modern JavaScript, and strong Next.js and server-side rendering experience* Experience building REST APIs and working with external APIs* SQL and ORM experience (Prisma is a plus ...

SKILLS Strong experience with Dynamics 365 CRM/CE and Power Platform. Advanced C# development including plugins, webhooks, and Custom APIs. Knowledge of JavaScript/TypeScript and CRM SDK/REST APIs. Experience delivering solutions in Agile environments. Understanding of Azure and cloud-based architectures. DESIRABLE EXPERIENCE Dynamics CRM Customer ...

across the stack as the role grows React, TypeScript, Node.js Used to fast-moving, high-traffic products where priorities shift quickly Strong TypeScript/JavaScript, HTML, CSS A good communicator strong stakeholder management skills Any experience working within Ecommerce would be a huge plus! Sound interesting? Get in touch ...

with ASP.NET MVC Framework. Strong experience of development using jQuery and SQL Server Good experience with .NET 10 Strong knowledge of C#, HTML, CSS, JavaScript Expert in ServiceNow usage or other ITSM tools Experience troubleshooting web applications in production. Understanding of MVC architecture, session management, authentication, and authorization. Expertise ...

experience across the full UI development lifecycle, including design, development, testing, and deployment. Technical Skills & Expertise- Frontend Technologies: Expert-level proficiency in HTML, CSS, JavaScript, React, and TypeScript Real-Time Communication: Strong understanding of WebSockets, Server-Sent Events (SSE), and REST APIs State Management & Programming: Solid experience with state management ...

Actions, access controls, notifications, forms and catalog items. Integration experience with REST, SOAP, APIs, IntegrationHub, MID Server and Import Sets. Working knowledge of JavaScript, Glide APIs, HTML, CSS and XML. Experience developing custom scoped applications and workflows across areas such as ITSM, CMDB, Security Operations, Workplace Service Delivery, Contract Management ...

Knowledge and skills Programming skills in PHP, Python essential. Experience in any of the following will be advantageous: C#, ASP.Net, ASP Classic, HTML, CSS, JavaScript, VB, Android and Mac. Knowledge of Windows environment and some knowledge of Windows IIS. Problem solving skills, ability to work with system users to resolve ...

opportunity, inclusion, and respect Required Qualifications, Capabilities, and Skills : Bachelor's degree in a relevant field Proficient in front-end frameworks such as React, JavaScript, TypeScript, HTML, and CSS Experience building high-performance desktop or web applications Experience with test-driven development, modern source control, and continuous integration Understanding ...

with Power Apps and Power Automate. Experience or exposure to Copilot Studio, AI Agents, or Microsoft AI technologies. Knowledge of Dataverse, Power FX, JSON, JavaScript, and API integrations. Familiarity with Microsoft 365 and Azure environments. Strong problem-solving and analytical skills. Excellent communication skills and the ability to work with ...

candidate with strong proficiency across a range of web and software development technologies, including: Core Development Languages & Frameworks: HTML CSS (including frameworks like SCSS) JavaScript PHP Java Key Development Concepts & Tools REST APIs SQL (for database management) MVC Architecture Mobile Development Search Engine Optimisation (SEO) Desirable Python ...

automation levels, and helping us engineer a world-class money transfer product.### Skills Required* Java* JVM-based languages* Spring framework* Scalable web applications* React* Javascript* Typescript* CI/CD pipelines* Distributed Systems* Concurrent Systems* Product mindset* Data-driven decisions* Relational databases* Non-relational databases* Query optimisation* Resilient schema design* Test ...

work across a broad set of technologies as we evolve the platform. Experience is helpful, but not essential:* **Languages:** Python, SQL, Terragrunt, JavaScript* **Cloud:** AWS (primary), some GCP* **Warehouse & Storage:** Snowflake, S3/Parquet* **Data & ETL:** dbt, Fivetran* **Platform & Infra:** Kubernetes, Kafka, RabbitMQ, Argo, GitHub Actions, HashiCorp Vault* **Observability:** Datadog ...

desirable but not essential. Essential Technical Skills: Proficiency across a range of web and software development technologies, including: HTML CSS (including frameworks like SCSS) JavaScript PHP Java Key Development Concepts & Tools : REST APIs SQL (for database management) MVC Architecture Mobile Development Search Engine Optimisation (SEO) Desirable: Python and AI Application ...

user impact, not just technical outcomes. Ensure NFT evidence is sufficient to support confident release decisions.? Tech stack Expertise in test automation using JavaScript based test frameworks such as WebdriverIO, Playwright or Cypress Open-source JS based libraries or frameworks for API testing, or Postman. Jmeter or K6 for load ...

experience, with at least one production system you\'d be proud to walk us through. You\'re fluent in at least one of Python, JavaScript/TypeScript, Java, or Apex — and willing to add to that list as the work demands. You\'ve been hands-on with LLMs and prompt ...