1 to 25 of 52 Contract JavaScript Jobs in London

and emerging technologies. Required Skills & Experience: Active SC Clearance (must be current). Proven experience as a Full Stack Developer in enterprise environments. Strong front-end expertise with React , JavaScript , TypeScript , HTML/CSS . Back-end proficiency with Java (Spring Boot) and ideally Node.js . Hands-on experience with Kubernetes and Red Hat OpenShift . Familiarity with CI/ More ❯

.NET ecosystem , delivering robust enterprise-grade applications Hands-on experience designing distributed microservices and event-driven integrations Proficiency with modern web frameworks and technologies such as React, Angular, Vue, JavaScript , SPA/SSR, and REST APIs Experience designing composable architectures (JAMstack, MACH), enabling scalable, API-first, modular solutions Strong understanding of Identity and Access Management standards (OAuth2, OpenID Connect, SAML More ❯

field (including computational, numerate or life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including core web application infrastructure is essential Strong skills in JavaScript/TypeScript and Python, ensuring best practices are followed for clean and scalable code Demonstrated ability to work directly with designers, particularly using Figma, to convert design prototypes into engaging 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 ❯

Graph , Teams apps (bots, Adaptive Cards), and custom connectors . Experience grounding LLMs (eg, Azure OpenAI , embeddings, RAG with Azure AI Search/vector stores ). Strong TypeScript/JavaScript or .NET (Python a plus) for building APIs/microservices that feed copilots. Solid understanding of Entra ID (Azure AD) , OAuth/Graph permissions, enterprise security and tenancy considerations. Comfort More ❯

APIs: Designing, developing, and consuming scalable APIs Docker: Proficiency in containerizing applications for local and cloud environments Communication: Excellent communication skills to convey complex ideas effectivel Nice to have: JavaScript & ReactJS: Experience building or integrating with front-end applications Linux in a containerised environment Immediate availability If you're interested in this role, click 'apply now' to forward an up More ❯

APIs: Designing, developing, and consuming scalable APIs Docker: Proficiency in containerizing applications for local and cloud environments Communication: Excellent communication skills to convey complex ideas effectivel Nice to have: JavaScript & ReactJS: Experience building or integrating with front-end applications Linux in a containerised environment Immediate availability If you're interested in this role, click 'apply now' to forward an up More ❯

Required Skills & Experience: C#/java, .NET Core Containerisation (Docker, Kubernetes, OpenShift) xUnit Agile working practices CI/CD tooling Scripting experience (Python, Perl, Bash, etc.) ELK (Elastic stack) JavaScript Cypress Linux experience Search engine technology (e.g., Elasticsearch) Big Data Technology experience (Hadoop, Spar k , Kafka, etc.) Microservice and cloud native architecture Desirable: Able to demonstrate experience of troubleshooting and More ❯

solution design documents, technical specifications, and user guides. Strong knowledge of CRM and ERP business processes - in sectors such as healthcare, retail, or regulated industries. Proficiency in C#, .NET, JavaScript, and SQL Server. Experience with data migration, integration strategies, and legacy system transformation. Strong stakeholder engagement and communication skills. Familiarity with Agile and DevOps methodologies. Data savvy (XML, Data Mapping More ❯

in a relevant field (computational, numerate, or life sciences) or equivalent experience. Essential cloud experience (Google Cloud and Cloud Run preferred) for core web application infrastructure. Strong skills in JavaScript/TypeScript and Python, adhering to best practises for clean and scalable code. Ability to work directly with designers using Figma to transform design prototypes into engaging applications. Experience with More ❯

Full Stack Software Developer? Proven experience developing full stack applications with C# and .NET Core Experience with Microsoft SQL Server Strong front-end development skills with HTML, CSS, and JavaScript Experience working with Microsoft Azure Knowledge of good software design and secure coding principles Solid understanding of good user interface design What Next? If you’re an experienced Full Stack More ❯

and solve complex technical problems. Help improve system performance, testing, and monitoring. What You'll Need: 3-5+ years of software development experience. Strong skills in TypeScript/JavaScript and Golang (or Java/Kotlin/C++). Experience with front-end frameworks like Angular or React . A solid understanding of data structures and algorithms. Excellent debugging and More ❯

and solve complex technical problems. Help improve system performance, testing, and monitoring. What You'll Need: 3-5+ years of software development experience. Strong skills in TypeScript/JavaScript and Golang (or Java/Kotlin/C++). Experience with front-end frameworks like Angular or React . A solid understanding of data structures and algorithms. Excellent debugging and More ❯

Experience with custom connector development, Azure Logic Apps, or Azure Functions Familiarity with AI/ML concepts, including LLMs, agentic workflows, and prompt engineering Solid programming skills in PowerShell, JavaScript, or Python Excellent communication and stakeholder engagement skills Ability to work in agile, cross-functional teams Preferred Qualifications: Microsoft certifications such as PL-100 and PL-400 Experience with AI More ❯

latency performance across browsers and platforms. Essential Skills: Strong experience with WebGL , ThreeJS , or similar 3D graphics frameworks. Proficiency in ReactJS and modern frontend development (HTML/CSS/JavaScript or TypeScript). Solid understanding of Python , particularly in the context of APIs and backend integration. Ability to work independently and drive frontend architecture decisions. Experience building interactive, visual, or More ❯

in solution design, quality assurance, and delivery. Provide technical guidance and oversight across development teams. Contribute to hands-on solution definition using modern technologies such as Java, C#, or JavaScript . Operate within agile frameworks (Scrum, SAFe) to ensure iterative, value-driven delivery. Apply experience with SharePoint or Electronic Document Management Systems (EDMS) to support secure integration and delivery. Leverage More ❯

the IBM Maximo Asset Management specialist position in Reading, UK 6 Months Contract JD: Minimum 7 - 8 Years of Experience in Maximo Application Suite, Maximo Manage 8.x Mandatory Java, Javascript, Jython, SQL knowledge Strong experience in Maximo Manage configuration and customization Strong experience in complex customizations using Maximo MBOs, Java, and automation scripts. Strong experience in integrating external systems like More ❯

perform conformance testing. Design Documentation: Produce journey maps, personas, usability test artifacts, and user research reports. Skills & Tools Required Design Tools: Figma, Sketch, Adobe XD Frontend Technologies: HTML5, CSS3, JavaScript, Bootstrap, jQuery Frameworks: React.js, Next.js, REST APIs Project Management: Jira, Agile/Scrum methodologies Soft Skills: Strong collaboration, planning, and communication abilities Hybrid - 3 days from London office/week More ❯

There are no dedicated testers, so attention to code quality is essential. Tech Stack OO PHP (7/8), bespoke MVC, Laravel , Symfony MySQL , Docker , AWS (EC2, RDS, Amplify) JavaScript , Bootstrap (minimal front-end work) Testing : PHPUnit, Behat, TDD practices CI/CD , GitLab, GitHub Security-first mindset (OWASP principles, secure coding) Ideal Candidate Proven experience in OO PHP development More ❯

Mappers (fka Data Raptors) Omni Processes (fka Integration Procedures) OmniScripts Skills in Apex (triggers, batch, web services) Integration Experience is beneficial (Mulesoft/APIGEE/Connected Apps) Experience of JavaScript/Lightning components Basic understanding of Apex sharing and security model Experienced with Lightning Web Components Skills in analysing and problem-solving issues Experience of prioritising tasks and working to More ❯

Developers to work on a Law Enforcement programme. Key Responsibilities: Work on data mapping and report writing in Java. Essential Skills: Java AWS Spring Boot Kafka Desirable Skills: React JavaScript SC + NPPV3 Cleared Java Developer - 6 months+ - £Inside IR35 - Remote with occasional travel to London Damia Group Limited acts as an employment agency for permanent recruitment and employment business More ❯

thinking and customer empathy What We’re Looking For: 2+ years of experience in a technical support, AdTech, or solutions engineering role Proven experience with web technologies : HTML, CSS, JavaScript, HTTP Comfortable working with SQL , APIs, browser debugging tools (e.g., Chrome DevTools) Strong understanding of digital advertising concepts — e.g., pixels, attribution, delivery, tag management Experience troubleshooting technical issues, escalating bugs More ❯

Ability to explain complex technical concepts to non-technical audiences Familiarity with advertising technologies (pixels, ad servers, auctions, delivery systems) Working knowledge of web technologies such as HTML, CSS, JavaScript, and HTTP Experience using SQL and RESTful APIs for data access or integrations Package: Day rate - £350-375pd PAYE Fully remote role 12-month contract More ❯

intuitive UX flows Support code reviews and ensure high-quality standards across projects Deliver production-ready features with smooth handovers to permanent teams Skills & Experience Must-have: Next.js React JavaScript/TypeScript Nice-to-have: Experience building SSO-enabled applications Exposure to gamification or UX-driven products Familiarity with Django-based backends Soft Skills: Creative and detail-oriented approach to More ❯

DATA ENGINEER TO HAVE... Proven experience building and deploying applications using Palantir Foundry Strong software/data engineering background - Computer Science, Physics, Maths, Data Science. Proficiency in Python and JavaScript/TypeScript Experience solving technical problems involving cloud, infrastructure, data pipelines, or full-stack apps Ability to design and manage Ontologies and build applications using Foundry tools like Workshop Strong More ❯