576 to 600 of 1,246 ECMAScript Jobs in London

highly collaborative, product led team building out greenfield features used by thousands of users every day. We’re looking for: 👉🏼 3+ years’ commercial experience with React Native & React 👉🏼 Strong JavaScript/TypeScript development background 👉🏼 Solid knowledge of state management, REST APIs, HTTP, async programming 👉🏼 Hands-on experience integrating with AWS (Cognito, Amplify, S3) 👉🏼 Experience working with app stores (Apple/ More ❯

on frontend patterns, API design, and how the frontend and backend fit together (they currently use Python, REST, GraphQL, microservices). What They Are Looking For: Proven expertise in JavaScript and React, including modern practices and shadcn experience. A track record of building products from scratch or pivoting products at speed, ideally in startup/scaleup contexts. A mindset for More ❯

highly collaborative, product led team building out greenfield features used by thousands of users every day. We’re looking for: 👉🏼 3+ years’ commercial experience with React Native & React 👉🏼 Strong JavaScript/TypeScript development background 👉🏼 Solid knowledge of state management, REST APIs, HTTP, async programming 👉🏼 Hands-on experience integrating with AWS (Cognito, Amplify, S3) 👉🏼 Experience working with app stores (Apple/ More ❯

highly collaborative, product led team building out greenfield features used by thousands of users every day. We’re looking for: 👉🏼 3+ years’ commercial experience with React Native & React 👉🏼 Strong JavaScript/TypeScript development background 👉🏼 Solid knowledge of state management, REST APIs, HTTP, async programming 👉🏼 Hands-on experience integrating with AWS (Cognito, Amplify, S3) 👉🏼 Experience working with app stores (Apple/ More ❯

Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Full Stack JavaScript Developer Salary: £70,000 to £80,000 pa (depending on experience) plus benefits, perks and health-care options Location: Hybrid/… exclusively open to UK sole nationals who either hold or are eligible for Security Clearance (SC). We are on the lookout for a talented and motivated Full Stack JavaScript Developer to join a dynamic Engineering team. If you're passionate about creating innovative web and mobile applications while ensuring high performance and scalability, this is your opportunity to make … an impact! Your Role: Designing, developing, and maintaining both front-end and back-end components of web and mobile applications using JavaScript, Node.js, and modern frameworks and libraries, with strong Angular JS , and others such as React, or Vue.js. Collaborating with architects and other developers to design robust, scalable, and secure architectures for new projects and enhancements to existing systems. More ❯

and occasionally contribute to presales activities Required Skills & Expertise: Strong technical expertise in Microsoft Dynamics 365 and the Power Platform (Power Apps, Power Automate, Power BI) Experience with C#, JavaScript/TypeScript, Azure Services, and D365 integration frameworks A passion for quality, scalability, and continuous improvement Excellent collaboration and communication skills Package: Full-time position. Work from home or one More ❯

mentality: adaptable, proactive, and comfortable wearing multiple hats A genuine interest in building meaningful products in a collaborative environment Nice to have Exposure to modern frontend technologies like TypeScript, JavaScript, and React Professional experience with ERP systems, ideally around inventory, warehouse, and logistics features Experience in fast-paced, early-stage startup environments Why Join? Backing from a globally recognised VC More ❯

stability, performance, and continuous improvement Provide technical leadership and mentorship to junior developers or admins Requirements: Proven experience with ServiceNow development and administration Strong understanding of ServiceNow architecture, scripting (JavaScript), and APIs Familiarity with Agile methodologies and DevOps practices ServiceNow certifications (e.g., CSA, CAD, CIS) are a plus Excellent problem-solving skills and a proactive mindset With Myn, you gain More ❯

contract £425 - £475 per day Outside IR35 London/Hybrid - 2x days a week in London Design and develop automated testing frameworks and strategies with Selenium and Playwright using Javascript/Typescript. Create and maintain test scripts utilising WebDriver, Selenium, Gherkin, and Cucumber Performance testing using JMeter Write clear and concise test cases and scenarios using JSON data structures to More ❯

in algorithms and data structures Experience with concurrent programming and asynchronous systems Familiarity with distributed systems, microservices-based architectures Commitment to clean, disciplined software engineering practices Proficiency in Go, JavaScript, Java, C++ or other similar statically typed languages Why Apply? Technically challenging projects in a highly collaborative, engineering-led environment Greenfield and business-critical development with rapid release cycles Flat More ❯

in algorithms and data structures Experience with concurrent programming and asynchronous systems Familiarity with distributed systems, microservices-based architectures Commitment to clean, disciplined software engineering practices Proficiency in Go, JavaScript, Java, C++ or other similar statically typed languages Why Apply? Technically challenging projects in a highly collaborative, engineering-led environment Greenfield and business-critical development with rapid release cycles Flat More ❯

in algorithms and data structures Experience with concurrent programming and asynchronous systems Familiarity with distributed systems, microservices-based architectures Commitment to clean, disciplined software engineering practices Proficiency in Go, JavaScript, Java, C++ or other similar statically typed languages Why Apply? Technically challenging projects in a highly collaborative, engineering-led environment Greenfield and business-critical development with rapid release cycles Flat More ❯

in algorithms and data structures Experience with concurrent programming and asynchronous systems Familiarity with distributed systems, microservices-based architectures Commitment to clean, disciplined software engineering practices Proficiency in Go, JavaScript, Java, C++ or other similar statically typed languages Why Apply? Technically challenging projects in a highly collaborative, engineering-led environment Greenfield and business-critical development with rapid release cycles Flat More ❯

certifications and ideally Certified Technical Architect (CTA). Experience across at least 3 product lines outside ITSM (e.g. ITOM, HRSD, CSM, SPM, SAM). Advanced scripting and integration skills (JavaScript, SQL, REST/SOAP APIs). Strong understanding of cloud platforms (AWS, Azure, GCP) and ServiceNow integrations. Experience operating in a Technical Design Authority capacity. Bonus: GenAI exposure, ITILv4 certification More ❯

solutions Understanding of the key technologies relevant to the ServiceNow integration solutions including: Integration Hub, SSO, Web Services, LDAP, JDBC, etc. Experience in scripting on the ServiceNow platform using JavaScript, CSS and Angular JS: Flows, Business Rules, Client Scripts, UI Actions, Widgets and UI Pages Ability to author clear and comprehensive documentation More ❯

solutions Understanding of the key technologies relevant to the ServiceNow integration solutions including: Integration Hub, SSO, Web Services, LDAP, JDBC, etc. Experience in scripting on the ServiceNow platform using JavaScript, CSS and Angular JS: Flows, Business Rules, Client Scripts, UI Actions, Widgets and UI Pages Ability to author clear and comprehensive documentation More ❯

solutions Understanding of the key technologies relevant to the ServiceNow integration solutions including: Integration Hub, SSO, Web Services, LDAP, JDBC, etc. Experience in scripting on the ServiceNow platform using JavaScript, CSS and Angular JS: Flows, Business Rules, Client Scripts, UI Actions, Widgets and UI Pages Ability to author clear and comprehensive documentation More ❯

solutions Understanding of the key technologies relevant to the ServiceNow integration solutions including: Integration Hub, SSO, Web Services, LDAP, JDBC, etc. Experience in scripting on the ServiceNow platform using JavaScript, CSS and Angular JS: Flows, Business Rules, Client Scripts, UI Actions, Widgets and UI Pages Ability to author clear and comprehensive documentation More ❯

requirements, provide technical guidance, and ensure that delivered solutions address real-world challenges faced by end users. Key Requirements: Demonstrated expertise in developing sophisticated front-end applications using React.js, JavaScript/TypeScript Proven experience building real-time trading or financial applications where high performance and low latency are essential for business success. Comprehensive understanding of front-end architecture principles, including More ❯

maintain full-stack features across Laravel + using Collaborate closely with design, growth, and product teams to deliver user-facing improvements with measurable impact. Write clean, testable PHP and JavaScript code — performance and maintainability matter. Contribute to CI/CD pipelines and deployments on Google Cloud (Cloud Run, Cloud SQL, Cloud Storage). Optimize MySQL queries, caching, and API performance More ❯

Essential skill set: Experience leading cloud-native teams in AWS and serverless Lambda Strong grasp of infrastructure-as-code (Terraform), observability (Datadog), and serverless architecture Background in software engineering (JavaScript/TypeScript preferred) Proven leadership in growing and developing engineering teams Product mindset with stakeholder engagement and roadmap ownership FinTech or scale-up background Containerisation lifecycle (not just in Kubernetes More ❯

Skills & Qualifications: 8+ years of experience in ServiceNow platform architecture and development. Minimum 2 years of hands-on experience architecting solutions in S2P and SOM modules. Strong command of JavaScript, Flow Designer, Script Includes, Business Rules, and UI Actions. Expertise in Integration Hub, MID Servers, and external system integrations. Deep understanding of ITSM, CSM, Procurement, and Finance domain processes. Certifications More ❯

working with relational databases or CRM Systems - Experience working in a consultancy environment would be ideal - Experience working with project based work - Skills in SQL, HTML, CSS, SSRS and JavaScript - Experience working within non-profit backgrounds would be desirable REF: AR129394Tiger is B Corp Certified. We are part of a global movement of businesses committed to improving social and environmental More ❯

of hands-on experience in IT Operations, including IT asset lifecycle management, infrastructure (networking, servers), and IT Helpdesk Demonstrable development/scripting skills in at least one language (Python, JavaScript, C#) Proven experience building solutions with the Microsoft Power Platform Familiarity with Azure or AWS A strong interest in AI/LLMs. Practical experience with Dify, or building RAG applications More ❯

of hands-on experience in IT Operations, including IT asset lifecycle management, infrastructure (networking, servers), and IT Helpdesk Demonstrable development/scripting skills in at least one language (Python, JavaScript, C#) Proven experience building solutions with the Microsoft Power Platform Familiarity with Azure or AWS A strong interest in AI/LLMs. Practical experience with Dify, or building RAG applications More ❯