1 to 25 of 74 JavaScript Jobs in Hertfordshire

Full Stack Engineer

Hiring Organisation
Consortia
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Someone who enjoys working across the full software lifecycle including architecture, implementation, testing, deployment and iteration Technologies you will work with • Languages: C#, .NET, JavaScript, TypeScript, HTML, CSS • Front end: React, Redux • Distributed and event driven: Akka, Rx • Messaging and streaming: Kafka, RabbitMQ, ActiveMQ • Databases: SQL and NoSQL • Containers & orchestration ...

Engineering Team Lead

Hiring Organisation
StarCompliance
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
teams. Strong hands-on expertise with the Microsoft .NET ecosystem: C#, ASP.NET MVC, Entity Framework, Visual Studio. Solid understanding of web technologies such as JavaScript, React, Angular, HTML. Strong grounding in software engineering principles, including SOLID, design patterns, and scalable architecture. Experience delivering enterprise-grade, cloud-hosted applications. Strong understanding ...

Engineering Team Lead

Hiring Organisation
StarCompliance
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
teams. Strong hands-on expertise with the Microsoft .NET ecosystem: C#, ASP.NET MVC, Entity Framework, Visual Studio. Solid understanding of web technologies such as JavaScript, React, Angular, HTML. Strong grounding in software engineering principles, including SOLID, design patterns, and scalable architecture. Experience delivering enterprise-grade, cloud-hosted applications. Strong understanding ...

Engineering Team Lead

Hiring Organisation
StarCompliance
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
teams. Strong hands-on expertise with the Microsoft .NET ecosystem: C#, ASP.NET MVC, Entity Framework, Visual Studio. Solid understanding of web technologies such as JavaScript, React, Angular, HTML. Strong grounding in software engineering principles, including SOLID, design patterns, and scalable architecture. Experience delivering enterprise-grade, cloud-hosted applications. Strong understanding ...

Python Developer

Hiring Organisation
Venture Up
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
2+ years of Python experience in a commercial environment, with strong asynchronous programming skills 2+ years of frontend development experience with React and modern JavaScript/TypeScript Demonstrated ability to build and maintain polished, responsive user interfaces Experience with REST APIs and modern web frameworks, such as FastAPI Practical experience ...

Python Developer

Hiring Organisation
Venture Up
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
2+ years of Python experience in a commercial environment, with strong asynchronous programming skills 2+ years of frontend development experience with React and modern JavaScript/TypeScript Demonstrated ability to build and maintain polished, responsive user interfaces Experience with REST APIs and modern web frameworks, such as FastAPI Practical experience ...

Tech Lead - British Airways Holidays

Hiring Organisation
IAG Loyalty
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
Lead, Engineering Manager or Architect, ideally on ecommerce or large-scale digital platforms. Strong full-stack skills, with depth in either frontend (React, TypeScript, JavaScript) or backend (NodeJS, microservices, Java). Hands-on expertise with AWS services, infrastructure as code (Terraform preferred), and containers/orchestration (Docker, ECS). Proven ...

AEM Backend Developer

Hiring Organisation
Vallum Associates
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
OSGi services using Java and the Sling framework. · Front-End Integration: Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. · System Integration: Integrate AEM with other core systems and Adobe Experience Cloud products (like ...

AEM Backend Developer

Hiring Organisation
Vallum Associates
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
OSGi services using Java and the Sling framework. · Front-End Integration: Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. · System Integration: Integrate AEM with other core systems and Adobe Experience Cloud products (like ...

C# Software Engineer

Hiring Organisation
Meritus
Location
Stevenage, Hertfordshire, United Kingdom
Employment Type
Contract
Contract Rate
£60 - £65/hour INSIDE IR35
skills Knowledge of using Microsoft Windows and Linux operating systems Non-essential Distributed simulation standards/Protocols (DIS, HLA, DDS) and web services development (JavaScript, Node JS or similar) Military Communications, Datalinks and Interfaces such as 1553/1760 and Ethernet TCP/IP Practical knowledge of System integration principles ...

Integrations Engineer - UK SC Clearance

Hiring Organisation
Akkodis
Location
Stevenage, Hertfordshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
Competitive salary
architectures in AWS/Azure Familiarity with API design and management , REST/SOAP , and event-driven architectures Hands-on experience with Python, JavaScript, or ETL/data transformati on tools Knowledge of SaaS platforms such as Salesforce, ServiceNow, SAP, or Pega Awareness of DevOps, CI/CD, and version ...

Full Stack Engineer

Hiring Organisation
RED Global
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
Fully Remote Role Must have Active SC Clearance Contract Until End of March 1st December Start Date Rate: £315 per day Skills Front-End: JavaScript, HTML; responsive UI patterns and adherence to modern web standards. Back-End: Node.js and Spring Boot microservices; RESTful API design and management (including policies, rate ...

Full Stack Engineer

Hiring Organisation
RED Global
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Fully Remote Role Must have Active SC Clearance Contract Until End of March 1st December Start Date Rate: £315 per day Skills Front-End: JavaScript, HTML; responsive UI patterns and adherence to modern web standards. Back-End: Node.js and Spring Boot microservices; RESTful API design and management (including policies, rate ...

C# Software Engineer

Hiring Organisation
Matchtech
Location
Stevenage, Hertfordshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 65 Hourly
using Microsoft Windows and Linux operating systems. Non-Essential Skills: Experience with distributed simulation standards/protocols (DIS, HLA, DDS) and web services development (JavaScript, Node JS or similar). Understanding of military communications, datalinks, and interfaces such as 1553/1760 and Ethernet TCP/IP. Practical knowledge ...

Software Engineer in Test

Hiring Organisation
Halian | Managed Services, Recruitment Agency & Contract Staffing
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
Skills & Experience Experience in software testing or software development, with a strong focus on quality assurance. Proficiency in programming or scripting languages such as JavaScript, Java, C#, Python, or Go. Hands-on experience with modern testing tools and frameworks like Cypress, Playwright, and Postman/Newman for test automation. Self ...

C# / C++ Software Engineer

Hiring Organisation
Certain Advantage
Location
Stevenage, Hertfordshire, South East, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£65 per hour, Benefits Overtime Rate
skills Knowledge of using Microsoft Windows and Linux operating systems Non-essential: Distributed simulation standards/Protocols (DIS, HLA, DDS) and web services development (JavaScript, Node JS or similar) Military Communications, Datalinks and Interfaces such as 1553/1760 and Ethernet TCP/IP Practical knowledge of System integration principles ...

Quantitative Developer - Asset Management - Pharos Resource Partners Ltd

Hiring Organisation
Jobs via eFinancialCareers
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
Mathematics, or related field (Master's/PhD preferred). Strong programming skills in Python, SQL, C# and WPF Front-end programming experience in Javascript/React Solid understanding of quantitative finance, financial markets, and trading strategies. Knowledge/experience in portfolio management Experience with high-performance computing and algorithm ...

Software Engineer | $125/hr Remote | Mercor

Hiring Organisation
Crossing Hurdles
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
testing, or software documentation. Background as a Senior or Staff Engineer, QA Engineer, or Technical Writer preferred. Proficiency in Python; familiarity with additional languages (JavaScript, TypeScript, Java, C++, Go, Ruby, Rust, Bash) is a plus. Understanding of Git workflows, testing frameworks, and debugging tools. Exceptional analytical and written communication skills. ...

Software Engineer | $125/hr Remote | Mercor

Hiring Organisation
Crossing Hurdles
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
testing, or software documentation. Background as a Senior or Staff Engineer, QA Engineer, or Technical Writer preferred. Proficiency in Python; familiarity with additional languages (JavaScript, TypeScript, Java, C++, Go, Ruby, Rust, Bash) is a plus. Understanding of Git workflows, testing frameworks, and debugging tools. Exceptional analytical and written communication skills. ...

Csharp Software Engineer

Hiring Organisation
Morson Edge
Location
Stevenage, Hertfordshire, South East, United Kingdom
Employment Type
Contract
Contract Rate
£49.70 - 65.00 per hour + None
Linux operating systems. Excellent written, verbal, and presentation skills. Desirable Skills: Familiarity with distributed simulation standards (DIS, HLA, DDS). Experience developing web services (JavaScript, Node.js or similar). Knowledge of military communication protocols (1553/1760, Ethernet TCP/IP). Understanding of system integration principles and processes. ...

UI Developer

Hiring Organisation
Journi
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
reviews Contribute to deployment and orchestration including containerization in Kubernetes Requirements: Degree in Software Engineering, Computer Science, Electronics or equivalent experience Strong proficiency in JavaScript, TypeScript and React Ability to design intuitive, performant and secure user interfaces Familiarity with source control systems and release processes Good understanding of modern frontend ...

Shopify Tech Lead

Hiring Organisation
Tiro Partners Limited
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
/CI/CD standards, etc.) Tech Stack & Skills You'll Use Shopify/Shopify Plus Liquid, HTML, CSS/SCSS, JavaScript GraphQL, REST APIs, Shopify Admin API Shopify Functions, UI Extensions Vite.js/Webpack, Shopify CLI Git/GitHub, CI/CD pipelines Performance optimisation (Core Web Vitals, Page ...

Shopify Tech Lead

Hiring Organisation
Tiro Partners Limited
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
/CI/CD standards, etc.) Tech Stack & Skills You'll Use Shopify/Shopify Plus Liquid, HTML, CSS/SCSS, JavaScript GraphQL, REST APIs, Shopify Admin API Shopify Functions, UI Extensions Vite.js/Webpack, Shopify CLI Git/GitHub, CI/CD pipelines Performance optimisation (Core Web Vitals, Page ...

Senior Software Engineer

Hiring Organisation
Cority
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
UK. Some of our environments require security vetting and you should be comfortable undertaking that process. Skills & Requirements Significant C# and web-development experience Javascript/Typescript experience Experience programming using a functional approach (professional or hobby) Desirable Exposure to the LanguageExt library in C# ( Health industry work experience SaaS ...

Senior Tester

Hiring Organisation
BBC Public Service
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Strong hands-on experience with cloud based technologies including AWS infrastructure as well as other CI/CD tooling e.g. JIRA, Git Experience with JavaScript/TypeScript If you can bring some of these skills and experience, along with transferable strengths, we'd love to hear from you and encourage ...