301 to 325 of 730 ECMAScript Jobs in London

. Location: WFH – Ad hoc visit to London HQ/9-day fortnight What You Bring Expertise in mobile/web app and API testing Proficiency in Python or JavaScript for automation Experience with tools like Postman, Selenium, Appium, PyTest, Locust, or K6 Strong Git and CI/CD skills (Azure DevOps, GitHub Actions) Familiarity with NoSQL databases Excellent problem More ❯

Proven experience as a Senior Software Engineer or similar role. Strong expertise in AWS services, particularly Amazon Lex and other AI/ML services. Proficiency in TypeScript and modern JavaScript frameworks. Solid understanding of DevOps methodologies and tools (e.g., CI/CD, Serverless, Monitoring). Experience with contact centre technologies and integrations. Excellent problem-solving skills and the ability to More ❯

Proven experience as a Senior Software Engineer or similar role. Strong expertise in AWS services, particularly Amazon Lex and other AI/ML services. Proficiency in TypeScript and modern JavaScript frameworks. Solid understanding of DevOps methodologies and tools (e.g., CI/CD, Serverless, Monitoring). Experience with contact centre technologies and integrations. Excellent problem-solving skills and the ability to More ❯

SKILLS AND EXPERIENCE: The ideal Principal Software Engineer will have: Strong mathematical and statistical expertise, ideally from a quantitative background. Proficiency in C# and the .NET platform. Experience with JavaScript front-end frameworks, such as React. Solid understanding of Network Programming (TCP/UDP). Experience with Distributed Version Control systems (e.g., PlasticSCM, Git, Hg). A history of good More ❯

Experience 5+ years in professional software development. Expert in C++11 or later , with a strong grasp of memory management, OOP, and concurrency. Skilled in AngularJS , HTML/CSS , and JavaScript . Experience with REST APIs , JSON, and version control (Git). Solid understanding of Agile frameworks (Kanban, Scrum). Why Join Us? Work on industry-defining self-service technologies Collaborate More ❯

Experience 5+ years in professional software development. Expert in C++11 or later , with a strong grasp of memory management, OOP, and concurrency. Skilled in AngularJS , HTML/CSS , and JavaScript . Experience with REST APIs , JSON, and version control (Git). Solid understanding of Agile frameworks (Kanban, Scrum). Why Join Us? Work on industry-defining self-service technologies Collaborate More ❯

Experience 5+ years in professional software development. Expert in C++11 or later , with a strong grasp of memory management, OOP, and concurrency. Skilled in AngularJS , HTML/CSS , and JavaScript . Experience with REST APIs , JSON, and version control (Git). Solid understanding of Agile frameworks (Kanban, Scrum). Why Join Us? Work on industry-defining self-service technologies Collaborate More ❯

on integration with Integra (finance), Axiom (budget management), Northgate/Zellis (HR and payroll) or similar finance/HR systems via REST or OData APIs Proficient in Power Fx, JavaScript/TypeScript, .NET C#, T-SQL, DAX and JSON Experience with Azure Functions, Logic Apps, Service Bus, API Management and DevOps pipelines More ❯

Experience 5+ years in professional software development. Expert in C++11 or later , with a strong grasp of memory management, OOP, and concurrency. Skilled in AngularJS , HTML/CSS , and JavaScript . Experience with REST APIs , JSON, and version control (Git). Solid understanding of Agile frameworks (Kanban, Scrum). Why Join Us? Work on industry-defining self-service technologies Collaborate More ❯

Support testing, iteration, and refinement throughout alpha, beta, and live phases. What You’ll Need We’re looking for someone with: 4+ years of experience in full stack development (JavaScript/TypeScript ). Proficiency with React (or similar) on the front end and Node.js, Express, or similar on the back end. Solid experience working with RESTful APIs, databases (e.g. PostgreSQL More ❯

streaming technologies (Spark Streaming) Data manipulation and wrangling techniques Development and deployment technologies (virtualisation, CI tools like Jenkins, configuration management with Ansible, containerisation with Docker, Kubernetes) Data visualization skills (JavaScript preferred) Experience deploying solutions on Cloud platforms (AWS, Azure, Google Cloud) including provisioning tools (Terraform) Strong interpersonal skills for client engagement and requirement gathering Ability to translate business needs into More ❯

at a native or business level. Willingness to participate in a minimal after-hours support rotation. Nice to have : Knowledge of programming languages such as C, C++, C#, Java, JavaScript, HTML, XML. Experience in fintech or financial services industry. Knowledge of SWIFT or other payment processing systems. Proficiency in additional languages like Arabic, French, Spanish, or Portuguese. Additional information : We More ❯

multiple priorities remotely. Experience defining, tracking, and reporting product KPIs; familiarity with A/B testing is a plus. Experience with AI and P2P projects is advantageous. Hands-on JavaScript development experience (Node.js, React, Angular) is a plus. More ❯

experience in software development, system integration, and creating customer-facing developer resources such APIs, SDKs and documentation. Experience of Full Stack Web development and Cloud Architecture Demonstrable Experience with JavaScript, NodeJS, Python or equivalent frameworks/languages Excellent interpersonal and communication skills, both verbal and written. Articulate, charismatic, and confident in a customer-facing role, with the ability to present More ❯

work full time in the UK. We do not offer visa sponsorships for this role. Nice-to-haves Production work with Golang or AWS. Scripting/web tech (Python, JavaScript/TypeScript). Web-scraping experience. 0-2 years professional software experience or equivalent projects. Our salary range for the role is £35,000 to £50,000, depending on experience More ❯

2+ years of hands-on experience with Braze CRM, including building and managing campaigns. Solid understanding of RESTful APIs, event-driven architectures, and microservices. Proficiency in HTML, CSS, and JavaScript for CRM asset customisation. Familiarity with GIT and continuous integration/deployment workflows. English at C1 level. Additional Skills & Qualifications Experience in coding Golang is preferred. Braze Developer Certification preferred. More ❯

WalkMe and digital adoption technologies. What you'll need to succeed Strong understanding of user behaviour and how to improve user engagement through WalkMe. Familiarity with HTML, CSS, and JavaScript to customise and integrate WalkMe elements into web applications. Analytical mindset, capable of interpreting data to make data-driven decisions and optimise WalkMe implementations. Excellent communication and collaboration skills, with More ❯

Good to have skills knowledge/expertise in FX/Fixed Income/Equity/Equity Derivatives products KDB Exposure and understanding in one or more of the modern JavaScript build tool chain using things like node, npm, rush, yarn, webpack, babel, cyprus Why this role is important to us Our technology function, Global Technology Services (GTS), is vital to More ❯

across the business to manage dependencies and deliver integrated outcomes Key requirements: 3+ years' experience managing engineering teams of 8 or more A strong background in software development using JavaScript, Java or Kotlin Experience building microservices and distributed systems using Docker, Kubernetes, and cloud-native patterns Deep knowledge of Agile delivery, DevOps practices, and automated testing pipelines Excellent problem-solving More ❯

Embedding a culture of collaboration, learning and empowerment Shaping the engineering culture by implementing best development practices What we would like to see from you Expert knowledge of vanilla JavaScript/TypeScript Understanding of WebAssembly Deep understanding of web security issues Significant hands-on experience with React Experience at developing services (RESTful API) including strong authentication (using JWT, 3rd party More ❯

in written form Championing quality assurance and best practices and mentoring individuals in their application Practical software development in one or more common languages, such as Java, C# or JavaScript Cloud platforms, particularly AWS or Azure Following an agile development methodology, such as SCRUM or SAFe Driving innovation within a team of engineers to find new solutions to difficult problems More ❯

and best practices that scale across teams. What You Bring 7+ years of experience in test automation , software engineering , or SDET roles . Advanced proficiency in Python , Java , C# , JavaScript , or Go . Strong experience building and scaling test automation frameworks and developer-focused tools. Deep understanding of distributed systems , API testing , and CI/CD pipelines . Hands-on More ❯

influence stakeholders. Experience managing large-scale SEO efforts across complex digital ecosystems (e-commerce, SaaS, or similar industries is a plus). Familiarity with web development languages (HTML, CSS, JavaScript) is a plus. Demonstrated success in driving SEO growth for large-scale websites or platforms. Familiarity with Agile methodologies and working in fast-paced, iterative development environments. Experience working in More ❯

a typo at a distance!) The ability to commute to our London office twice a week Bonus points for: Basic understanding of html, css/scss and/or javascript Ability to use no code tools like Webflow Personal Attributes: Has a deep sense of compassion, for not only the members of the team, but also the clinicians and patients More ❯

concepts to non-technical audiences Desired requirements for the role are: Previous experience working in a technical support, development, or automation role Some basic knowledge of programming languages (e.g., JavaScript, Python, etc.) Familiarity with REST APIs and their integration with other tools and platforms An understanding of web application testing methodologies and frameworks An awareness of emerging AI-driven platforms More ❯