76 to 100 of 1,015 ECMAScript Jobs in London

OWASP Top 10 for Agentic AI, AI skills development and security triage. Ability to code in at least one programming language e.g. Python/JavaScript/CSharp/Powershell Prior experience working in a large organisation or Financial Services is an advantage Excellent analytical skills with attention to details CISSP ...

testing of the software you build.This role will offer you the opportunity to get hands on with a number of different technologies, including Javascript, Typescript, React, Node.JS and .NET.Everyone is welcome.We have a culture of creativity. We approach our work passionately, improve constantly and celebrate our wins at every turn. ...

delivery standards Essential Experience Solid experience building and deploying complex web application platforms in production Expert-level proficiency in TypeScript, React, HTML5, CSS, and JavaScript (ES6+) Demonstrated experience profiling and optimising high throughput React applications (Web Workers, virtual rendering, memory management) Experience with desktop containers: Chromium, Electron, or OpenFin; familiarity ...

Proficiency in performance testing tools like JMeter, Gatling, K6, Neoload, or Webload Strong coding skills in at least one language such as Java, TypeScript JavaScript, Python, C#, Scala, or PHP Experience designing and building automation frameworks Familiarity with Agile development environments ( SCRUM, Kanban, TDD, BDD ) Implementing pipelines using common tooling ...

collaborative, learning-focused teams.Dedication to understanding the business domain and translating product strategy into architecture and delivery plans.Corporate Actions domain experience strongly preferred.Experience with JavaScript/TypeScript and Angular for full-stack development contexts preferred.Expertise in Spring Framework, software architecture, and API/platform design preferred.Background in financial services, risk ...

meet business the business requirements. Develop Java Services integrated in the end to end processing of the derivative products Build C#/WPF and JavaScript front-end desktop applications to interface with the Java services Build a stable, efficient, scalable cloud based solution which will be deployed globally. Design ...

solutions that meet business the business requirements.Develop Java Services integrated in the end to end processing of the derivative productsBuild C#/WPF and JavaScript front-end desktop applications to interface with the Java servicesBuild a stable, efficient, scalable cloud based solution which will be deployed globally.Design and code ...

engagementsExperience developing, modifying, or extending offensive security tooling, scripts, or payloadsWorking knowledge of at least one of C, C#, Python, PowerShell, and/or JavaScript, to support offensive security objectivesPractical understanding of evasion techniques, endpoint security controls, operational security, and detection-aware tradecraftStrong understanding of networking and web protocols, including ...

automation frameworks from scratch using Object-oriented and scripted languages Has breadth of experience across different tech-stacks. At least two of the following: JavaScript/TypeScript, Java, C#, or Python, amongst others Has a depth of knowledge in the Object-oriented Programming paradigm (OOP) and has practically applied ...

with experience in the majority of: C#, .NET Framework 3.5+ inc. ASP.NET/MVC, .NET Core Visual Studio 2010+ OOAD and UML techniques HTML, JavaScript, JQuery XML, XSD, JSON Network architecture and protocols such as SNMP, HTTP, SOAP, SOA-Web Services Phonegap/Cordova Agile/Lean and Traditional methodologies ...

SDLC, TDD, and code review. Data: Working with relational, columnar, and vector stores, grounded in sound data-modelling principles. Languages: Python, Java, TypeScript/JavaScript, SQL, and relevant AI SDKs. Mentoring: Developing skills in mentoring engineers through pair programming and day-to-day collaboration. Communication: Clear written and verbal communication ...

GitHub Copilot Claude Code OpenAI GPT/Azure OpenAI Anthropic Claude APIs Agentic AI LangChain LangGraph CrewAI Software Engineering Strong development experience with Python, JavaScript/TypeScript, C# or Java REST APIs and microservices Software architecture and engineering best practices Desirable Skills Experience with any of the following would ...

automate processes working alongside the business leadImplementing automated regression testing for the software developedSkills and Experience:Excellent working knowledge of ASP.NET, C#, HTML, JavaScript, jQuery, React Framework, MS SQL Server, Mongo DB, ElasticsearchUnderstanding of SOLID development principlesWorked previously on projects using the Umbraco CMSContinuous Delivery skills, tools and techniques (e.g. ...

C#/ASP.NET Proven experience in the delivery of system/software development projects in a structured environment ASP.NET MVC HTML5/CSS Some JavaScript/jQuery and related client-side frameworks, e.g. Angular, Web Services/WCF/NHibernate SQL Server/T-SQL Experience in a variety ...

Stack Engineer will have strong SQL Server/Azure SQL, including database design, data modelling, queries, performance and data integrity. Strong React, Node.js and JavaScript/TypeScript experience. Experience with Azure Web Apps and taking applications through to production. Strong understanding of software engineering fundamentals, with the ability to independently ...

performance, cost and delivery timelinesBuild and optimise systems for performance, scalability and reliabilityRequirements:Proficiency in at least one programming language (for example Python, C#, JavaScript, Kotlin, Java or Go)Experience with Gen AI tools (such as LangGraph, CrewAI, Hugging Face or OpenAI APIs) and ML frameworks like PyTorch or TensorFlowStrong ...

system design background Experience delivering enterprise applications using AWS, Azure or GCP Strong engineering experience with technologies such as Python, SQL, Java, .NET or JavaScript Experience working with modern enterprise data technologies such as Snowflake and/or Databricks Good understanding of enterprise data platforms, data architecture, on-premise lakehouse ...

utilizing Azure SQL Server, Data lake, etc. In-depth knowledge & experience using Visual Studio, with one of the programming languages: C#/Java/JavaScript/Python, and PowerShell. Thorough understanding of the fundamental architecture of the cloud and on-prem MSFT Suite. Solid fundamentals and thorough understanding of exception ...

utilizing Azure SQL Server, Data lake, etc.In-depth knowledge & experience using Visual Studio, with one of the programming languages: C#/Java/JavaScript/Python, and PowerShell.Thorough understanding of the fundamental architecture of the cloud and on-prem MSFT Suite.Solid fundamentals and thorough understanding of exception handling principles ...

guidance, code reviews and mentoring to other engineers. You should have: Strong commercial experience with Python for backend and integration development. Strong TypeScript/JavaScript and React experience building production applications. Strong API design experience, including REST and/or GraphQL, authentication, authorisation, versioning and streaming. Hands-on experience with ...

guidance, code reviews and mentoring to other engineers. You should have: Strong commercial experience with Python for backend and integration development. Strong TypeScript/JavaScript and React experience building production applications. Strong API design experience, including REST and/or GraphQL, authentication, authorisation, versioning and streaming. Hands-on experience with ...

Platform Technologies AWS SageMaker Python scripting and automation Container orchestration platforms Infrastructure security and hardening Cloud networking and connectivity Application Support Knowledge C# .NET JavaScript React REST APIs Microservices architecture COTS Product Experience Supporting Commercial Off-The-Shelf products within secure environments Troubleshooting intelligence, analytical or partner-provided systems Exposure ...

SharePoint Online, Power Apps, GitHub, MS Teams, etc.In-depth knowledge & experience using Visual Studio, with one of the programming languages: C#/Java/JavaScript/Python, and PowerShell.In-depth knowledge and thorough experience of using Serverless, SOAP, XML, REST, JSON, EDI, XSLT, Async/Sync, Request/Response, Service ...

Platform Technologies AWS SageMaker Python scripting and automation Container orchestration platforms Infrastructure security and hardening Cloud networking and connectivity Application Support Knowledge C# .NET JavaScript React REST APIs Microservices architecture COTS Product Experience Supporting Commercial Off-The-Shelf products within secure environments Troubleshooting intelligence, analytical or partner-provided systems Exposure ...

frameworks - with a strong focus on building production-grade, enterprise-scale services. Frontend Development: Proficiency in modern front-end technologies including Angular, TypeScript/JavaScript, HTML/CSS, with working knowledge of jQuery and component-based UI architecture. Data & Persistence: Strong command of relational and analytical database technologies, e.g., Oracle ...