101 to 125 of 276 ECMAScript Jobs in London

+ Bonus + Package Salary: Up to £120,000 + Bonus + Package Location: London (Hybrid Working) Skills: React as a main language (modern JavaScript/TypeScript) This firm is an elite technology company with exceptionally high standards , known for pushing boundaries and previously setting world records in the tech ...

time systems engineering Strong communication and collaborative skills Product mindset and proactive approach Nice To Have (not essential): Distributed systems experience Kubernetes REST APIs JavaScript/TypeScript AI/LLM familiarity Defence simulation or digital twin experience The Company: This is a genuinely exciting opportunity to join a scaling deep ...

understand code. Experience supporting partner or customer implementations. Strong stakeholder management and customer-facing experience. Good understanding of web technologies. Hands-on experience with: JavaScript HTML CSS Excellent communication and problem-solving skills. Ability to work effectively in a fast-paced, collaborative environment. Preferred Experience Previous experience in technical support ...

knowledge extraction, enrichment, and automation ⚙️ Contribute to DevOps practices across CI/CD, infrastructure, and observability What we’re looking for: 👩 💻 Deep full-stack JavaScript or strong backend Python expertise 🔥 High agency mindset with end-to-end ownership 🎯 Strong track record of shipping production-ready features quickly 🤖 AI fluency ...

with modular separation (e.g., distinct services for data parsing, logic processing, and reporting). Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases. Practical experience building for live, non-mocked environments and handling multi-turn system interactions. Outstanding attention ...

with modular separation (e.g., distinct services for data parsing, logic processing, and reporting). Strong command of at least two major languages (e.g., Python, JavaScript, Go, or Java) and experience working with SQL databases. Practical experience building for live, non-mocked environments and handling multi-turn system interactions. Outstanding attention ...

Applications Duration - 6 months with likely extension Rate - £490 p/d (inside IR35) Location - Hybrid/Canary Wharf Tech Stack C# WPF Winforms Javascript SQL Oracle Tasks Tasks range from understanding business requirements, designing application structures, business data analysis, programming WPF (Windows Presentation Foundation) applications in Visual C#.NET ...

design and backend teams in a small, senior squad Leverage AI-assisted tooling to accelerate development and innovation You Will Need – Strong experience with JavaScript, React and modern frontend architecture Proven track record delivering data-heavy or dashboard-led B2B products Expertise in data visualisation tools Experience working in early ...

your own workflow (Claude, Copilot etc.) Fast-learning and motivated to move with a rapidly evolving space Nice to have: Full-stack experience (JavaScript/TypeScript) Experience taking AI products from POC to production commercially 📍 Location: London – Hybrid (min. 2 days/week) 💰 Compensation: Up Up to £115k + bonus ...

Extensive SAP UI5/Fiori development experience or as SAP UX Architect that can lead SAP FIori developers Strong skills in UI5, Fiori, JavaScript, HTML5, CSS, XML, debugging tools Hands-on development with CDS Views (including UI annotations) Experience with OData services (SAP Gateway), BOPF, RAP framework Good understanding ...

frameworks (3DS, SCA, AVS, MIT) Familiarity with API-based integration methods and related tools/frameworks Familiarity with front and back end technologies (i.e. JavaScript, CSS, HTML etc) Excellent communication and interpersonal skills, with the ability to effectively engage with both technical and non-technical stakeholders. Results-oriented approach with ...

modern cloud data platforms (Snowflake, Databricks, BigQuery, Redshift) and data ingestion patterns (batch, streaming, CDC). Hands‐On Development - Proficiency in programming (e.g., JavaScript, Python, SQL, R) and data frameworks like pandas or Jupyter. Excellent Communication - Strong presentation skills; adept at explaining complex ideas and guiding stakeholders toward impactful solutions. ...

Specialist in at least one ServiceNow product suite ITIL Foundation certification (v3 or v4) Strong hands-on experience with ServiceNow scripting and configuration, including JavaScript, CSS, AngularJS, Flows, Business Rules, Client Scripts, UI Actions, Widgets, and UI Pages A solid understanding of ServiceNow integrations , including Integration Hub, SSO, Web Services ...

robust, scalable services and platforms that enable secure operations across an organization. Proven experience in programming and scripting languages (e.g., Go, Python, Bash, Java, JavaScript ). Minimum Qualifications Bachelor's degree in computer science (or similar) with 5+ years of relevant industry experience Significant experience with Golang and Git/… quality, performance , etc. Experience leveraging ORMs to interact with databases efficiently Familiarity with Python, Java, Swift, C, C++ and/or Objective-C ; and JavaScript and/or Typescript/React is a plus ...

robust, scalable services and platforms that enable secure operations across an organization. Proven experience in programming and scripting languages (e.g., Go, Python, Bash, Java, JavaScript ). Minimum Qualifications Bachelor's degree in computer science (or similar) with 5+ years of relevant industry experience Significant experience with Golang and Git/… quality, performance , etc. Experience leveraging ORMs to interact with databases efficiently Familiarity with Python, Java, Swift, C, C++ and/or Objective-C ; and JavaScript and/or Typescript/React is a plus ...

using Python and SQL, with integration into Azure-based infrastructure and Snowflake data platforms. Building intuitive, performant front-end interfaces using React and modern JavaScript/TypeScript frameworks. Contributing to architecture decisions across multiple products, ensuring consistency, scalability, and long-term maintainability. Designing and developing APIs for internal and external … modern data platforms such as Snowflake (or similar analytical warehouses). Experience with .NET is desirable. Strong frontend development experience using React and modern JavaScript/TypeScript. Experience designing and building APIs and distributed systems. Solid understanding of data engineering concepts, including data modelling, ETL/ELT pipelines, and performance ...

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). ...

Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native (back end leaning) Why? start-up financial services, revolutionising the industry Start : ASAP Location : Hybrid - 1-3 days in the office (Central London) Our Client A start-up FinTech is launching credit card, personal loans and insurance offerings aimed … back end leaning) Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Beneficial experience of React Native Understanding of RESTful APIs and web application architecture. Experience in a start ...

Full Stack Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native (back end leaning) Why? start-up financial services, revolutionising the industry Start : ASAP Location : Hybrid - 1-3 days in the office (Central London) Our Client A start-up FinTech is launching credit card, personal loans and insurance offerings … back end leaning) Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Beneficial experience of React Native Understanding of RESTful APIs and web application architecture. Experience in a start ...

Full Stack Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native (back end leaning) Why? start-up financial services, revolutionising the industry Start : ASAP Location : Hybrid - 1-3 days in the office (Central London) Our Client A start-up FinTech is launching credit card, personal loans and insurance offerings … back end leaning) Expertise in Node.js and AWS Lambda for serverless backend services. Proficiency in React with Next.js for frontend development. Proficiency in TypeScript, JavaScript and experience with infrastructure as code using Terraform. Beneficial experience of React Native Understanding of RESTful APIs and web application architecture. Experience in a start ...

Lead Engineer London, United Kingdom Posted 11 months ago Tech stack SEO React Frontend Git Next.js Express JavaScript GitHub PostgreSQL TypeScript Skills Required Experience with Git and GitHub. Nice to-haves Experience working with TypeScript, Next.js, React, Express, Postgres. Experience with search engine optimization (SEO), e.g. programmatic pages, front ...

DevOps Engineer/Site Reliability Engineer London, United Kingdom Posted 11 months ago Tech stack Terraform Go CloudFormation PHP Ansible JavaScript Python Ruby Puppet DevOps Reliability Node.js Degree in Computer Science Required Skills Orchestration tools such as Puppet, Chef, Ansible, CloudFormation, or Terraform Programming experience with any of Python ...

fast-paced financial domain, focusing on core Trading Systems and Execution Platforms. The ideal candidate will have hands-on experience in Java and JavaScript, as well as a strong understanding of Capital Markets. Competitive senior-level packages and premium benefits are offered. #J-18808-Ljbffr ...

performing team Remove blockers and accelerate delivery What You Bring Strong React Native experience at scale Background working in complex/brownfield environments Solid JavaScript/TypeScript + React skills Working knowledge of Swift and Kotlin Proven leadership and team-building experience Bonus Retail or high-scale consumer apps Native ...

Role : Technical Solutions Consultant Location : London, UK Type : Contract(Hybrid - Inside IR35) Job Description Technical Skills Web Technology Expertise : Strong proficiency in JavaScript, HTML, and CSS is essential. Code Debugging : Ability to read, understand, and debug complex, potentially minified code from external partner websites. Technical Troubleshooting : Experience with Chrome Developer ...