ECMAScript Jobs in London

51 to 75 of 2,110 ECMAScript Jobs in London

Full Stack .Net Developer – 11056SR3

London, England, United Kingdom
Hybrid / WFH Options
Proactive.IT Appointments Limited
and data-layer components, working within an Agile, cloud-based (Azure) environment. ️ Key Responsibilities Full-stack development using C# .NET Core , Web API , Angular 9+ , HTML/CSS, and JavaScript frameworks. Build and support Microservices , Azure Service Bus integrations, and containerized services (Docker). Develop and maintain APIs, web services, and enterprise data layers. Collaborate with cross-functional teams including … and maintain existing systems; implement business-driven enhancements. Skills & Experience Required Proficient in C# .NET Core/.NET Framework Strong front-end experience : Angular 9+, responsive HTML/CSS, JavaScript RESTful APIs, Web API, Microservices Azure Cloud , Service Bus, SQL Server, Docker (preferred) Familiarity with Entity Framework , GraphQL, and ETL processes Experience with Unit Testing , mocking frameworks, and secure coding More ❯
Posted:

Full Stack Technical Lead (6 Month Contract) - Immediate Start

London, United Kingdom
Hybrid / WFH Options
The ECA International Group
International on a. This is a hands-on leadership role suited to a self-starter with strong technical expertise and a passion for building robust, scalable solutions using Node.js, JavaScript/TypeScript, and React. The successful candidate will be responsible for guiding technical direction, mentoring developers, fostering a high-performing team culture, and owning end-to-end project delivery. You … a related discipline - or equivalent practical experience. 8+ years of professional experience in software development, with demonstrable technical leadership. Essential Experience : Strong hands-on experience with Node.js, TypeScript/JavaScript, React (or Remix), SQL/NoSQL databases, and CSS. Proven track record of leading Agile development teams. Experience designing and building cloud-based, scalable applications. Familiarity with test-driven development More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Full Stack Technical Lead (6 Month Contract) - Immediate Start

London, England, United Kingdom
Hybrid / WFH Options
ECA International
International on a. This is a hands-on leadership role suited to a self-starter with strong technical expertise and a passion for building robust, scalable solutions using Node.js, JavaScript/TypeScript, and React. The successful candidate will be responsible for guiding technical direction, mentoring developers, fostering a high-performing team culture, and owning end-to-end project delivery. You … a related discipline - or equivalent practical experience 8+ years of professional experience in software development, with demonstrable technical leadership Essential Experience : Strong hands-on experience with Node.js, TypeScript/JavaScript, React (or Remix), SQL/NoSQL databases, and CSS Proven track record of leading Agile development teams Experience designing and building cloud-based, scalable applications Familiarity with test-driven development More ❯
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Senior C# Developer - Finance

City of London, London, England, United Kingdom
Hybrid / WFH Options
Client Server Ltd
some experience with Docker/Kubernetes, EKS You have a good understanding of CQRS and event driven architectures Ideally you will also have some front end development experience with JavaScript/TypeScript/React.js or Angular You have strong analytical and problem solving skills You're collaborative with excellent communication skills What's in it for you: As a Senior More ❯
Employment Type: Full-Time
Salary: £70,000 - £80,000 per annum
Posted:

Full Stack Engineer

London Area, United Kingdom
Hybrid / WFH Options
Russell Tobin
with cross-functional teams using Agile methodologies. Rapidly prototype new ideas while ensuring scalability and robustness for production systems. Technical Skills Programming Languages: Java, Python, C#, C/C++, JavaScript, Ruby Web Technologies: React, Webpack, SCSS, Node.js, AngularJS Protocols: HTTP, TCP/IP, UDP, SMTP, DNS API Development: REST, SOAP, RPC, RMI Architectures: Microservices, Cloud-Native, Federated Modules, Micro-frontends More ❯
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Full Stack Engineer

City of London, London, United Kingdom
Hybrid / WFH Options
Russell Tobin
with cross-functional teams using Agile methodologies. Rapidly prototype new ideas while ensuring scalability and robustness for production systems. Technical Skills Programming Languages: Java, Python, C#, C/C++, JavaScript, Ruby Web Technologies: React, Webpack, SCSS, Node.js, AngularJS Protocols: HTTP, TCP/IP, UDP, SMTP, DNS API Development: REST, SOAP, RPC, RMI Architectures: Microservices, Cloud-Native, Federated Modules, Micro-frontends More ❯
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Product Engineer / Software Engineer

City of London, London, United Kingdom
Mentmore Recruitment
bugs, and continuously improving. Support the automation of testing and deployment pipelines to improve release velocity and confidence. Technical Skills Required: Proficiency in modern programming languages and frameworks (e.g. JavaScript/TypeScript, Python, .NET, Node.js). Experience with frontend development (e.g. React, Angular, Hugo). Strong understanding of backend systems, API design, and system integration. Comfortable working with cloud platforms More ❯
Employment Type: Contract
Rate: £70000 - £80000/annum
Posted:

Software Engineering Manager - Remote

London, United Kingdom
Hybrid / WFH Options
Develooper LLC
following areas, with the ability to learn others as needed: Distributed or large-scale systems MySQL/SQL database design, query optimization, and administration Web development using HTML, CSS, JavaScript, Vue/React Apache web server and related modules Cloud platforms such as AWS, Google Cloud, Azure CI/CD pipeline setup, testing, and administration Networking and firewall configuration Natural More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior/Lead Software Engineer

London, England, United Kingdom
GroupM
systems. Experience with advertising technology (AdTech) highly desired. Proven experience and a passion for developing and operating full stack production systems in Clojure, k8s, and AWS or GCP. ClojureScript, JavaScript, TypeScript, React, Java, Python, and Terraform experience highly desirable. Proven experience leading teams, designing simple/scalable/reliable architectures, building, and operating concurrent, distributed systems, solving difficult and novel More ❯
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Senior Engineering Manager

London, United Kingdom
CUBE Content Governance Global Limited
for one of our key products, delivering enhancements as part of the ongoing development of the product post MVP. Build, lead, mentor, and guide a team of C# and Javascript developers, fostering a collaborative and high-performing environment. Provide technical leadership and expertise on development best practices, design patterns, and architectural decisions. Participate in the entire software development lifecycle, including More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Full Stack Developer

London, England, United Kingdom
Hybrid / WFH Options
AMCS Group
Computer Science or equivalent industry experience Solid experience with .NET technologies including C#, ASP.NET Core, MVC, WebAPI and VB.NET Experience with Test Driven Development Front-end development skills with JavaScript, HTML, CSS, Vue.js Familiarity with CI/CD tools such as Jenkins, Git, and Jira Strong knowledge of SQL-based RDBMS (e.g., MSSQL) Strong organisational skills and the ability to More ❯
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Freelance Senior Software Engineer - £day rate (outside IR35) London

London, England, United Kingdom
Red Badger Consulting Limited
potential technical blockers Upskilling and embedding modern software practices in client teams where necessary Your experience It’d be great if you have experience with: Frontend web technologies (e.g. Javascript, Typescript, CSS, HTML, etc.) Frontend web frameworks (e.g. React, VueJS, etc.) Backend technologies (e.g. Node.js, Go, Rust, etc.) Relational and Non-relational databases (e.g. ElasticSearch, Redis, PostgreSQL, etc.) System architecture More ❯
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Senior Software Engineer London, England

London, England, United Kingdom
Group M Worldwide Inc
systems. Experience with advertising technology (AdTech) highly desired. Proven experience and a passion for developing and operating full stack production systems in Clojure, k8s, and AWS or GCP. ClojureScript, JavaScript, TypeScript, React, Java, Python, and Terraform experience highly desirable. Proven experience leading teams, designing simple/scalable/reliable architectures, building, and operating concurrent, distributed systems, solving difficult and novel More ❯
Posted:

Engineering Manager (Full Stack) - Ethical Marketplace

London, United Kingdom
Hybrid / WFH Options
Wolf & Badger
engineering leadership role, preferably in a fast-paced startup or scale-up environment. Strong technical expertise in software development, with proficiency in one or more programming languages (e.g., Python, JavaScript, Java, etc.). Solid understanding of modern software development methodologies, tools, and practices, including Agile/Scrum, CI/CD, and DevOps. Demonstrated ability to lead and inspire engineering teams More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Engineering Manager

London, England, United Kingdom
CUBE
for one of our key products, delivering enhancements as part of the ongoing development of the product post MVP. Build, lead, mentor, and guide a team of C# and Javascript developers, fostering a collaborative and high-performing environment. Provide technical leadership and expertise on development best practices, design patterns, and architectural decisions. Participate in the entire software development lifecycle, including More ❯
Posted:

Python Developer (AWS)

London, England, United Kingdom
Hybrid / WFH Options
TEKsystems
years of professional software development experience with deep expertise in Python. Proven experience in software architecture and cloud programming, especially with AWS. Familiarity with front-end technologies such as JavaScript/TypeScript, React, or Angular. Strong experience with DevOps tools (Docker, Kubernetes, GitOps). Proficiency in Terraform and IaC practices. Excellent communication and technical documentation skills. Ability to work independently More ❯
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Senior Front End Software Engineer (Remote)

London, England, United Kingdom
Hybrid / WFH Options
M3
across the organization to deliver high-quality applications. Take ownership of assigned deliverables, ensuring work is delivered iteratively while embracing Agile principles. Qualifications Knowledge and Skills: Strong proficiency in JavaScript (ES6+), with a deep understanding of core language concepts and best practices. Expertise in modern frontend frameworks with advanced experience in React, Next.js, and Angular. Deep understanding of TypeScript for More ❯
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Senior Software Engineer

London, England, United Kingdom
Disney Cruise Line - The Walt Disney Company
Electronics Engineering, or comparable field of study, and/or equivalent work experience Proficient in object-oriented design and expertise with one of the following programming languages: Node/JavaScript, Java, Python Experience with test automation and unit testing frameworks Excellent problem-solving skills. Excellent collaboration skills and ability to use standard software development lifecycle (SDLC) tools such as Jira More ❯
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Senior Engineer - NodeJS

London, England, United Kingdom
LegalAndGeneral
your findings and insights in developer forums to foster a culture of continuous learning and innovation Qualifications Who we're looking for: Extensive knowledge of the following is essential: JavaScript, TypeScript, NodeJS, AWS SDK & CDK, Python, React, HTML and CSS, Java, Spring, Terraform or CloudFormation Hands on experience building serverless applications in AWS Hands on experience building microservices in Java More ❯
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Global IT Software Engineer Senior Manager

London, United Kingdom
The Boston Consulting Group GmbH
Experience leading and developing solutions across a varied technology stack, including: - Object-Oriented design, SOLID principles, and modern design patterns - Developmentexperience in Microsoft .Net Framework and experience inFront-end JavaScript frameworks like Angular & React - Traditional Relational Database technologies like Oracle, MS SQL Server and - No SQL Databases like MongoDB or DynamoDB - SOA & Microservices architecture implementation using REST APIs, queue-based More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Global IT Software Engineer Senior Manager

City of London, England, United Kingdom
The Boston Consulting Group GmbH
Experience leading and developing solutions across a varied technology stack, including: - Object-Oriented design, SOLID principles, and modern design patterns - Developmentexperience in Microsoft .Net Framework and experience inFront-end JavaScript frameworks like Angular & React - Traditional Relational Database technologies like Oracle, MS SQL Server and - No SQL Databases like MongoDB or DynamoDB - SOA & Microservices architecture implementation using REST APIs, queue-based More ❯
Posted:

Retail Developer

London, England, United Kingdom
Sharp Gaming
in Computer science or a related software development principle as well as at least 2 years of industry experience in the following: C# .Net 8 HTML/CSS/JavaScript SQL GIT Exposure to Cloud environments (Azure/AWS.) A good grounding in C# OOP programming Keen attention to detail is a must for thorough testing of your work Demonstrable More ❯
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Register Your Interest - Technical Placement - Space, Defence & Intelligence

London, United Kingdom
Industry Placements
programming, problem-solving, data analysis or systems development would be beneficial for this role. Including any of the following Programming Languages: Exposure to languages such as: • C++, Java, Python, JavaScript, C# Systems & Tools: Knowledge of or experience with any of the following: Linux/Unix operating systems Cloud Technologies (AWS, Azure, Google Cloud) DevOps tools (e.g., Docker, Kubernetes) Version Control More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Register Your Interest - Technical Placement - Space, Defence & Intelligence

Hounslow, London, United Kingdom
Industry Placements
programming, problem-solving, data analysis or systems development would be beneficial for this role. Including any of the following Programming Languages: Exposure to languages such as: • C++, Java, Python, JavaScript, C# Systems & Tools: Knowledge of or experience with any of the following: Linux/Unix operating systems Cloud Technologies (AWS, Azure, Google Cloud) DevOps tools (e.g., Docker, Kubernetes) Version Control More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead Software Engineer

London, England, United Kingdom
GroupM
systems. Experience with advertising technology (AdTech) highly desired. Proven experience and a passion for developing and operating full stack production systems in Clojure, k8s, and AWS or GCP. ClojureScript, JavaScript, TypeScript, React, Java, Python, and Terraform experience highly desirable. Proven experience leading teams, designing simple/scalable/reliable architectures, building, and operating concurrent, distributed systems, solving difficult and novel More ❯
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