1 to 25 of 46 JavaScript Jobs in Hertfordshire

Collaborative Spirit – works fluidly with data scientists, commercial teams, and ops leaders. Hard Skills Required • Software Engineering: Strong in at least one modern language (JavaScript/TypeScript, Java, Python) • Web & Product Development: Frameworks (React, Node.js, Django/Flask) • AI, GenAI and LLMs: OpenAI, Gemini, Grok, Llama • Agentic AI: Frameworks (langchain ...

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: 10+ years of software engineering with proven architectural leadership - you shape ...

logic as well as NodeJS frameworks including ReactJS, NextJS, NestJS etc. You will have commercial experience in Frontend Web development technologies, including HTML, CSS & JavaScript/Typescript as well in using Git or related technologies. Ideally you will have TDD or BDD development experience as well as an understanding ...

/AEM HTL (HTML Template Library) Experience integrating React with AEM Sling Models Working within enterprise CMS-driven architectures Core Technical Skills HTML5, CSS3, JavaScript (ES6+) React.js & TypeScript State management (Redux/Zustand) API integration (REST/GraphQL) Version control using Git Front-end testing (Jest, Cypress, etc.) Strong debugging ...

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 ...

interpreting designs and patterns provided by other team members and approved 3rd parties into workable, scalable, reliable solutions. Proficient in creating code, processes, JavaScript, T-SQL, formulas, C#, PowerShell and other scripts as required. Proficient in manipulating and working with a range of data formats including JSON, XML, delimited text ...

logic as well as NodeJS frameworks including ReactJS, NextJS, NestJS etc. You will have commercial experience in Frontend Web development technologies, including HTML, CSS & JavaScript/Typescript as well in using Git or related technologies. Ideally you will have TDD or BDD development experience as well as an understanding ...

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 ...

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 ...

related discipline). Strong commercial experience with C#. Experience building and maintaining highly scalable, high-performance systems. Solid knowledge of web development (HTML, JavaScript, CSS) and database design. Familiarity with design patterns, refactoring, and OO design principles. Proactive and detail-oriented, with strong analytical and problem-solving skills. Excellent communication ...

data platforms. What You’ll Need • 3+ years of hands-on development experience. • Strong skills in React and Next.js. • Solid understanding of TypeScript and JavaScript (ES6+). • Familiarity with Node.js, API integrations, and AWS environments. • Experience building and deploying production applications using CI/CD pipelines. • Self-motivated, proactive ...

Mastery: Extensive professional background working with the JVM ecosystem (specifically Java or Kotlin). Modern Web & Orchestration: Ideally you will have proficiency in JavaScript frameworks and experience with workflow engines. Cloud-Native Data: Solid experience architecting on AWS and managing both relational and document-based data stores like Postgres ...

reports, technical notes and business development What they'll bring: A degree in Computer Science, GIS, Geospatial Technology or similar Experience with Python, JavaScript, SQL, HTML and CSS Familiarity with geospatial platforms and libraries (e.g. ESRI, QGIS, GDAL, GeoPandas) An interest in offshore, marine or renewable energy projects A collaborative ...

team environment. What you'll need: Core Technology skills required – Strong full stack software engineering skills. Desirable technology skills: Python, Django, React, JavaScript, MySQL, SPAs, AWS (Lambda, CloudFormation, RDS). 5+ years of relevant experience in the core technology skills Best practice software development skills and practices. Excellent communication skills ...

will be highly proficient in the following languages and technologies: PHP (procedural and object oriented at versions 7 and above) HTML 5 CSS 3 Javascript (ES6 and above) MySQL/MariaDB Git version control (including LFS) Required WordPress proficiencies As a WordPress specialist, we would also expect the successful candidate ...

Bring • Strong experience in automated testing • Solid understanding of the SDLC and agile methodologies • Experience working with CI/CD pipelines • Proficiency in TypeScript, JavaScript, and ideally ReactJS • Hands‐on experience with Playwright, Cypress, or Selenium • Familiarity with test management tools such as Xray • Knowledge of BDD frameworks (Gherkin/ ...

taking the time to ship high-quality code. What you bring to the table: Experience building and scaling web applications. Strong understanding of modern JavaScript frameworks. Strong coding ability. Passionate problem-solving mindset. Reputation for getting things done. Strong sense of ownership. Desire to learn and grow. Desired qualifications: Experience ...

Contribute to CI/CD pipelines, cloud deployment, monitoring and automation Help define the engineering culture as a team. Tech We Use Frontend: Twig, JavaScript, CSS Backend: PHP Databases: PostgreSQL Caching/Search: Redis, ElasticSearch (Deep experience in all is not required - strong engineering fundamentals are.) About You 5+ years ...

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 ...

write and be able to understand fluent English. Deep knowledge and regular usage of Firebase suite, especially Firestore. Strong proficiency in TypeScript and modern JavaScript (ES6+). Familiarity with Expo, React Navigation, Reanimated and Vision Camera. Understanding of mobile app development best practices, including release automation and performance optimisation. ...

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 ...

Looking For Experience working with Foreign Exchange (FX) systems Strong grasp of QA methodologies, tools and best practices Hands-on experience using Cypress Solid JavaScript programming skills Strong SQL knowledge Experience with both white-box and black-box testing Excellent written and verbal communication Detail-oriented, quality-driven mindset High ...

similar fine if you transition quickly). Proven experience building and shipping scalable web apps and APIs. Strong SQL skills (MySQL ideal). Good JavaScript knowledge and comfortable plugging into front-end logic. Confident working in Linux/server environments and debugging across the stack. Bonus: Kotlin, Android/ ...

experience with Postman or similar tools for API testing. Nice to have: ISTQB Software Testing Foundation qualification. Familiarity with .NET Core/Standard or JavaScript-based front-end frameworks. Experience working in a microservices environment. Experience with automation testing. Extra Benefits: Free parking Private medical insurance Profit sharing Sick ...

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 ...