1 to 25 of 42 JavaScript Jobs in Hertfordshire

Event-driven, microservices-oriented design Cloud: Azure (AWS experience valued), Infrastructure-as-Code Data: SQL, caching strategies, message brokers (RabbitMQ, etc.) Frontend: HTML, CSS, JavaScript DevOps: CI/CD pipelines, Behaviour-Driven Development, modern agile methodologies What You Bring: Senior: 6+ years of software engineering experience Principal: 10+ years ...

complex frontend issues across browsers and devices. Qualifications 5+ years professional experience in frontend development with strong expertise in React and Next.js. Proficiency in JavaScript, TypeScript, HTML, CSS, and related tooling. Experience with state management (Redux, Zustand, Recoil, or similar). Strong understanding of responsive design, accessibility, and UI/ ...

passionate about building systems that last. You'll bring: Expert-level experience with C#, .NET and object-oriented design Strong front-end knowledge using JavaScript/TypeScript and React Deep experience designing and governing enterprise APIs (REST & SOAP), ideally on Azure Proven leadership in DevOps, CI/CD pipelines ...

degree in Computer Science or a closely related discipline. - 4+ years building modern web or data applications with .NET and at least one JavaScript framework. - Hands-on experience with Azure or another major cloud provider, plus an understanding of microservices and event-driven architectures. - You love balancing delivery speed with ...

culture on cyber security awareness. Candidate Qualifications Technical Skills and Experiences As the Senior Web Developer, you will provide deep knowledge of the following Javascript/JQuery Java/Groovy Any Grails experience will be of benefit. HTML and CSS Working experience of the following MS SQL Server databases, including ...

developing and integrating AI solutions such as chatbots, voicebots, ML models, or LLM-based analytics. Strong proficiency in Python (preferred) and/or JavaScript/TypeScript. Hands-on experience with AI frameworks (TensorFlow, PyTorch, LangChain) and LLM APIs (Azure OpenAI, OpenAI API, Anthropic, AWS Bedrock). Experience with Microsoft ...

long-term reliability What We're Looking ForRequired: · 2+ years software development experience · Commercial experience with Angular (v10+) · Strong proficiency in TypeScript and JavaScript · Familiar with RxJS and reactive programming concepts · Experience working with APIs (REST or GraphQL) · Some Node.js back-end experience (or willingness to grow in that area ...

technology skills, including substantial leadership and architecture responsibilities. Core Technology skills required – Strong full stack software engineering skills. Desirable technology skills: Python, Django, React, JavaScript, MySQL, SPAs, AWS (Lambda, CloudFormation, RDS). Best practice software development skills and practices. Excellent communication skills with an open, collaborative approach. A passion ...

experience with at least one of: .NET, Python, or PHP Practical experience with Laravel or another MVC framework Solid understanding of HTML, CSS, and JavaScript Experience working with databases (MySQL, PostgreSQL, SQL Server, etc.) Confidence working independently on tasks and features Good problem-solving and communication skills Nice to Have ...

continuously improve solution design and delivery. Required Skills & Experience Strong commercial experience with Node.js for backend development. Front-end development experience using modern JavaScript frameworks (e.g. React, Vue, Angular). Experience designing and building data-driven web applications and APIs. Solid understanding of software development best practices, security, and scalability. ...

There is a strong DevOps culture with an emphasis on clean design, shared tooling, and reducing unnecessary complexity. Typical technologies include Python backend Modern JavaScript frameworks on the front end Containerisation with Docker CI pipelines using GitLab or similar Infrastructure as code using Terraform Cloud native platforms such as Azure ...

hands-on experience in Quality Assurance and Test Automation. Proficiency in at least one programming language used for automation, such as Java or JavaScript Clear understanding of Object-Oriented Programming (OOP) and ability to apply them in test automation frameworks. Proficiency in test automation tools such as Selenium, Playwright, REST ...

project managers Learning best practices around performance, security, and scalability What We're Looking For Essential: Basic knowledge of web fundamentals (HTML, CSS, JavaScript) Some exposure to at least one back-end language such as .NET, Python, or PHP A strong desire to learn and improve Ability to follow guidance ...

days/month; occasional team gatherings Salary: Senior: €130–150k base + growth trajectory Principal: €160–200k base + package discussion Tech: Python, JavaScript, Azure, AWS, AI, LLM's, RAG Industry: AI Consultancy The Role We're looking for talented engineers to join our customer-facing AI practice, from Senior ...

team grows Skills 4+ years commercial software development experience 2–3+ years experience with React.js 2–3+ years experience with Node.js and modern JavaScript (ES6+) Experience with relational databases such as Postgres Familiarity with Git and CI/CD workflows Strong collaboration and communication skills Agile development experience Writing clean ...

both AWS and Azure Solid experience with API design and management , including REST , SOAP , and event-driven architectures Hands-on development experience using Python , JavaScript, and/or ETL/data transformation tools Experience integrating with enterprise SaaS platforms such as Salesforce , ServiceNow , SAP , or Pega Strong communication skills, able ...

across AWS and Azure Solid knowledge of API design and management, including REST/SOAP and event-driven architectures Hands-on experience with Python, JavaScript, or ETL/data transformation tools Experience integrating with SaaS platforms including Salesforce, ServiceNow, SAP, or Pega Strong communication skills with the ability to engage ...

Minimum 3+ years of commercial experience with Magento 2, specifically with a backend focus. Tech Stack: Strong proficiency in PHP, MySQL, HTML/CSS, JavaScript, and Git. AI-Augmented Workflow: You are comfortable working with AI-native IDEs (e.g. Google Antigravity, Cursor, Windsurf) to speed up debugging and code generation. ...

6 month fixed term contract. We are looking for a senior full-stack React developer to help a client continue development of their AI research product. It enables teams to transform their research into interactive ...

well-tested new product features. This role isn't just about coding; it's about influencing product and business impact. Desired Skills & Experience Backend JavaScript/TypeScript/Node.js software engineering experience SASS, DynamoDB, AWS Lambda, and Serverless Framework are all beneficial eCommerce/Shopify experience is a bonus ...

leadership roles Proven experience leading development teams and senior engineers within a digital agency or professional services environment Strong hands-on experience with PHP, JavaScript, HTML, and CSS Proven experience delivering complex custom websites, platforms, integrations, and ecommerce solutions Deep practical experience with WordPress, and working knowledge of Shopify ...

campaigns. Technical Skills & Experience We're looking for someone who can combine developer credibility with content creation expertise: Strong software development background, ideally in JavaScript/TypeScript and/or Python. Proven experience using and extending Visual Studio Code (extensions, integrations, workflows). Familiarity with AI developer tools, LLM APIs ...

calm professional manner, even when things are changed at the last minute. w. We are looking for prior experience of: programming in HTML5, Javascript, CAD tools (CREO and SolidWorks). Knowledge of multimedia authoring tools (Storyline, 3DSMax, Flash PhotoShop and Da Vinci Resolve amongst others and using them to create ...

Position: Front End JavaScript Developer Reports to: Front End Development Team Lead Hours: 40 hours Location: 3 days in North London office (Monday – Wednesday) Salary: £60 - £80,000 + eligibility for performance bonus Start date: ASAP Purpose of the role: As a Front End Developer you will join … highest standards of code quality in alignment with company-wide conventions. Required skills: · Minimum of 4 years of hands-on experience with Javascript working mainly on Frontend solutions · Solid grasp of JavaScript(Vanilla Javascript) fundamentals, including understanding of the Document Object Model (DOM) and browser Application Programming Interfaces (APIs). ...

drive efficient design and development processes Demonstrated hands-on success; in programming using: Java, Pro C and PL/SQL in scripting languages using: JavaScript and shell script in database query language such as: Oracle - performance, EXA, etc. 9 + years of experience as an Engineer in a Retail domain ...