101 to 125 of 890 JavaScript Jobs in London

application security, or related software engineering roles. Strong foundational knowledge of secure coding and OWASP Top 10 risks. Experience with at least one modern programming language (e.g., Python, Java, JavaScript, Go, or C#). Familiarity with cloud platforms (AWS, Azure, or GCP) and container technologies (Docker, Kubernetes). Exposure to security tooling such as SAST, SCA, or DAST scanners (e.g. More ❯

with GCP or Azure is a plus). Experience monitoring and optimizing model performance in production settings. Programming Languages: Strong coding skills in Python and SQL. Experience with Node.js, JavaScript (JS), and TypeScript (TS) is a plus. Statistical Knowledge: Solid understanding of statistical concepts and methodologies for analyzing and interpreting large datasets. Ability to apply statistical techniques to validate models More ❯

to build solutions or break down technical problems Expert proficiency with the Java programming language. The platform uses a range of technologies including Java, C#/WPF, Python, React, JavaScript and Cassandra on Windows & Linux platforms. Excellent analytical skills (i.e. problem solving) Disciplined approach to code management, testing and deployment practices. Advanced understanding of Agile development methodologies, CI/CD More ❯

career development opportunities and performance bonuses. For a comprehensive list of benefits, speak to our recruitment team. We Are Looking For Hands on experience of developing software in Java, JavaScript or Python Understanding of Cloud-based architectures in AWS or Azure Use of DevOps Automated Deployment tools such as Jenkins, Gitlab, Docker, OpenShift or Kubernetes Understanding of database technologies such More ❯

assisted coding. About you Minimum 5 years of hands-on, product-focused experience with React development Proven leadership experience in software development teams Expert-level proficiency in React, TypeScript, JavaScript, HTML, CSS, and modern web technologies Strong experience with Microsoft Office integration, particularly Office.js and Word add-ins Experience with agentic coding assistants such as Claude Code Excellent English communication More ❯

/17). Experience with relational databases (e.g., SQL, PostgreSQL, MySQL) and ORM frameworks (e.g., Hibernate, JPA). Solid understanding of front-end technologies such as HTML, CSS, JavaScript, and modern JavaScript frameworks (e.g., ReactJS, MobX and TypeScript). Experience with RESTful API design and development. Familiarity with cloud platforms (e.g., AWS, Azure, GCP) and containerization technologies (e.g., Docker, Kubernetes More ❯

skills. Effective communication skills for understanding project needs and working with the team. Advantageous: Experience with automated data harvesting using Python, C#, or Java. Familiarity with front-end technologies (JavaScript, React). Experience with cloud platforms like AWS or GCP (especially BigQuery). Exposure to Big Data tools such as Elasticsearch. Background in the travel industry. Knowledge of GitHub and More ❯

to automation. WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE.... Current enhanced DV clearance Experience with at least one or more of the following: Java, Python, C++, .NET, C#, JavaScript, React Experience mentoring juniors or leading a team Experience/Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE.... Cloud based experience Microservice architecture or More ❯

to automation. WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE. Current enhanced DV clearance Experience with at least one or more of the following: Java, Python, C++, .NET, C#, JavaScript, React Experience mentoring juniors or leading a team Experience/Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE. Cloud based experience Microservice architecture or More ❯

D, implementation to automation. WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE.... Current enhanced DV clearance Experience with at least one of the following: Java, Python, C++, C#, .NET, JavaScript, React Experience mentoring juniors or leading teams is nice to have but not essential Experience/Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER TO HAVE.... More ❯

to meet them Excellent problem-solving skills and the ability to independently perform root cause analysis. Must have: Web applications expertise using modern web technologies (e.g. CSS, HTML, HTML5, JavaScript, jQuery). Knowledge in UX design principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes More ❯

prior trading or sports market experience required - just strong engineering skills Tech Stack C#/.NET (Latest versions) SQL Server , plus experience with Oracle or equivalent Bonus: exposure to JavaScript/React , multi-threading , or network programming (TCP/UDP) What You'll Be Doing Build and maintain internal tooling that powers automated sports market trading Contribute to greenfield systems More ❯

Zereheight for design systems. Experience creating automation processes for component governance. In-depth knowledge of design patterns, UI/UX principles, and front-end technologies such as HTML, CSS, JavaScript, and BeastNative. Strong understanding of software architecture principles. Experience with version control systems (e.g., Git), package managers, and dependency management tools. Excellent communication and interpersonal skills, with the ability to More ❯

involving in-house resources and/or third party suppliers Ability to design and architect technical solutions to complex business problems Full Stack development experience (ASP.NET, C#, HTML, CSS, JavaScript, JQuery, ReactJS, AngularJS, MS SQL Server) CMS experience e.g. with Umbraco Continuous Delivery skills, tools and techniques (e.g. Git, Github, Jenkins, Docker, Vagrant, Chef, Puppet, Selenium, etc.) Familiar with Azure More ❯

involving in-house resources and/or third party suppliers Ability to design and architect technical solutions to complex business problems Full Stack development experience (ASP.NET, C#, HTML, CSS, JavaScript, JQuery, ReactJS, AngularJS, MS SQL Server) CMS experience e.g. with Umbraco Continuous Delivery skills, tools and techniques (e.g. Git, Github, Jenkins, Docker, Vagrant, Chef, Puppet, Selenium, etc.) Familiar with Azure More ❯

and monitoring tools. Knowledge of containerization and orchestration technologies (Docker, Kubernetes). Familiarity with database security practices and compliance standards. Scripting and automation skills using languages like Python, Bash, JavaScript or similar. Familiarity with version control systems (Git) and CI/CD pipelines. Strong problem-solving skills and the ability to work effectively in a fast-paced environment. Excellent communication More ❯

technical and non-technical audiences Knowledge of GenAI & QE developments Experience building advanced automation frameworks using object-oriented and scripted languages Proficiency in at least two of the following: JavaScript/TypeScript, Java, C#, Python Strong understanding of OOP principles Experience working in Agile teams, designing automated tests, and ensuring test coverage Ability to collaborate with developers and understand CI More ❯

object model/reporting Advanced Salesforce Apex development, including invocable Flow actions and batch Apex Salesforce Experience Cloud site building Development of robust Salesforce Lightning Web Components (HTML, CSS, JavaScript) Experience with DevOps pipelines and troubleshooting (including Python, Node.js, Bash) Knowledge of AWS services (Lambda, Secrets Manager, API Gateways) Salesforce email configuration, including DNS/DKIM/SPF AI prompt More ❯

and best practices Hiring Process Initial screening Technical test Second-stage interview Requirements Proven experience as a Frontend Engineer with proficiency in React, React Native, Next.js Strong understanding of JavaScript, TypeScript, HTML, and CSS Familiarity with RESTful APIs and GraphQL Experience with testing tools such as Vitest, React Testing Library, and Playwright Knowledge of Continuous Integration and Delivery techniques Experience More ❯

and contributing directly to increased website traffic and conversions. What We're Looking For: Essential Skills & Experience: 2+ years of commercial experience using PHP and WordPress. Strong understanding of JavaScript, HTML, and CSS. Experience with React and/or similar frameworks (Next.js is a significant advantage!). Proficiency in SQL. Experience with Git for version control. Good understanding of on More ❯

contributing directly to increased website traffic and conversions. What We're Looking For: Essential Skills & Experience: 2+ years of commercial experience using PHP and WordPress . Strong understanding of JavaScript, HTML, and CSS . Experience with React and/or similar frameworks (Next.js is a significant advantage!). Proficiency in SQL . Experience with Git for version control. Good understanding More ❯

implementations. Support the development and evolution of CoE standards and reusable engineering assets. Required Skills and Experience Proven experience developing enterprise-grade applications using Angular or React. Proficiency in JavaScript/TypeScript, HTML5, CSS3, and modern frontend development tooling. Demonstrated ability to design secure, performant, and accessible frontend architectures. Experience integrating with RESTful APIs and backend services. Prior experience working More ❯

contributing directly to increased website traffic and conversions. What We're Looking For: Essential Skills & Experience: 2+ years of commercial experience using PHP and WordPress . Strong understanding of JavaScript, HTML, and CSS . Experience with React and/or similar frameworks (Next.js is a significant advantage!). Proficiency in SQL . Experience with Git for version control. Good understanding More ❯

and contributing directly to increased website traffic and conversions. What We're Looking For: Essential Skills & Experience: 2+ years of commercial experience using PHP and WordPress. Strong understanding of JavaScript, HTML, and CSS. Experience with React and/or similar frameworks (Next.js is a significant advantage!). Proficiency in SQL. Experience with Git for version control. Good understanding of on More ❯

desktop and web applications Open-source tools like Sikuli, Selenium, and Cypress Test frameworks using Java or Python for desktop-based applications Web development technologies including HTML, CSS, and JavaScript CI/CD tools and pipeline automation Strong communication and a collaborative mindset Our Tech Stack C Computer Vision: C+/20, Qt, Boost, ZeroMQ, ElasticSearch Web: Java, Node.js, RESTful More ❯