ECMAScript Job Vacancies

1 to 25 of 2,602 ECMAScript Jobs

Senior .NET Full Stack Engineer

England, United Kingdom
Consulting Point
SQL database experience (SQL Server, Postgres) Knowledge of secure coding, accessibility, and web best practices Familiarity with Entity Framework (EF Core) Additional Preferred Experience Building microservices in Java or JavaScript/TypeScript Working with NoSQL databases (MongoDB, Cosmos DB) Exposure to Large Language Model tools (e.g., LangChain, Vercel AI) Experience with GOV.UK Design System or templating engines such as Razor More ❯
Posted:

eDV Software Engineer

United Kingdom
Fortice Ltd
Troubleshoot, debug, and upgrade existing systems Contribute to Agile ceremonies and continuous delivery practices Essential Skills & Experience Active eDV clearance (applications without this cannot be considered) Strong experience with JavaScript/TypeScript and modern frameworks (React, Angular, or Vue) Proficiency in back-end development (Node.js, Java, C#, or Python) Experience with databases (SQL and/or NoSQL) Strong understanding of More ❯
Employment Type: Permanent
Salary: £90,000
Posted:

Senior Java Developer

London, United Kingdom
Ascendion
Agile methodologies and SDLC best practices. Strong problem-solving, analytical, and communication skills. Preferred: Experience in banking, payments, or financial services domain. Knowledge of front-end technologies (Angular, React, JavaScript) for full-stack exposure. Understanding of security protocols, authentication (OAuth2, JWT), and compliance requirements. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Java Developer

London, United Kingdom
Ascendion
Agile methodologies and SDLC best practices. Strong problem-solving, analytical, and communication skills. Preferred: Experience in banking, payments, or financial services domain. Knowledge of front-end technologies (Angular, React, JavaScript) for full-stack exposure. Understanding of security protocols, authentication (OAuth2, JWT), and compliance requirements. More ❯
Employment Type: Permanent, Contract
Posted:

Senior Product Engineer remote

South West London, London, United Kingdom
Hybrid / WFH Options
Serve Legal
product needs, UX, and scalability. 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, langgraph, Google ADK) AI enabled More ❯
Employment Type: Permanent
Salary: £80,000
Posted:

Senior Developer

London, South East, England, United Kingdom
Hybrid / WFH Options
Reed.co.uk
Minimum 8 years of commercial software development experience, with at least 3 years in a senior or technical lead role. Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development Tools such as Windsurf, Aider More ❯
Employment Type: Full-Time
Salary: £70,000 - £90,000 per annum
Posted:

COTS Developer Senior with Security Clearance

Falls Church, Virginia, United States
Mindbank Consulting Group
Certified Associate Cloud Engineer. • Languages: Typescript/JavaScript, Java, HTML, CSS, Python, nix shell, Groovy, C/C++, Go, Dart, PHP, Ruby Rails, jQuery, CSS, REST, MySQL. • Databases: PostgreSQL, MySQL, MongoDB, Elasticsearch. • Build technologies: Jenkins, Maven, Gradle, CMake. • Cloud technologies: Containers (Docker/Podman), Public cloud (GCP/AWS), Kubernetes, Microservices. • Frameworks: NodeJS, React, Angular, Spring, Flutter. • Other technologies: Apache More ❯
Employment Type: Permanent
Salary: USD Annual
Posted:

Senior .Net Engineer

London Area, United Kingdom
Stealth iT Consulting
Server or PostgreSQL Familiarity with .NET Entity Framework (EF Core) Knowledge of web accessibility standards and best development practices Bonus Skills: Exposure to microservices built in additional languages (e.g., JavaScript, TypeScript, or Java) Experience integrating with NoSQL solutions like MongoDB or Cosmos DB Interest in working with large language models (LLMs) using tools like LangChain Experience with templating systems or More ❯
Posted:

Senior .Net Engineer

City of London, London, United Kingdom
Stealth iT Consulting
Server or PostgreSQL Familiarity with .NET Entity Framework (EF Core) Knowledge of web accessibility standards and best development practices Bonus Skills: Exposure to microservices built in additional languages (e.g., JavaScript, TypeScript, or Java) Experience integrating with NoSQL solutions like MongoDB or Cosmos DB Interest in working with large language models (LLMs) using tools like LangChain Experience with templating systems or More ❯
Posted:

Full-Stack Engineer with Security Clearance

Shawnee Mission, Kansas, United States
Hybrid / WFH Options
ECCO Select
full-stack web applications using frameworks such as React, Vue, Angular, Node.js, Python, or Java. - Implement secure, scalable RESTful APIs and microservices. - Develop responsive user interfaces with modern CSS, JavaScript, TypeScript, and UI frameworks. - Deploy applications to cloud platforms (preferably AWS). - Write well-tested, maintainable code; participate in code reviews and agile development cycles. Essential Skills, Experience: - Bachelor's More ❯
Employment Type: Permanent
Salary: USD Annual
Posted:

C# Software Engineer

Nottingham, Nottinghamshire, England, United Kingdom
Hybrid / WFH Options
Adria Solutions
uptime, and code quality Collaborate in cross-functional teams and contribute to design decisions Mentor junior engineers and promote team growth What you’ll bring Proficiency in C#, .NET, JavaScript, and TypeScript Experience with React, Vue.js, or Angular (preferred) PHP knowledge (desirable) Familiarity with cloud services (AWS, GCP, or Azure), Docker, Kubernetes Understanding of CI/CD, DevOps, SQL/ More ❯
Employment Type: Full-Time
Salary: £40,000 - £60,000 per annum
Posted:

Senior DevOps Engineer - AWS

London, South East, England, United Kingdom
Robert Walters
the team. Ensure all customers and stakeholders are treated fairly and with respect. What we're looking for Technology-focused degree preferred, or equivalent demonstrable experience. Extensive knowledge of: JavaScript, TypeScript, NodeJS, AWS SDK & CDK, Python, React, HTML/CSS, Java, Spring, Terraform/CloudFormation Hands-on experience: Building serverless applications in AWS Building microservices in Java (Spring Boot) Strong More ❯
Employment Type: Full-Time
Salary: £75,000 - £90,000 per annum
Posted:

Senior Full Stack Web Developer with Security Clearance

Mc Lean, Virginia, United States
Harmonia Holdings Group, LLC
and/or performance issues Optimize web pages for maximum speed and scalability with a focus on the user experience Develop front-end applications using HTML/CSS/JavaScript, and other front-end development frameworks such as Angular and React Work as part of a development team for the development of both front-end web applications and back-end More ❯
Employment Type: Permanent
Salary: USD Annual
Posted:

Full Stack Java Developer, Lead with Security Clearance

Ashburn, Virginia, United States
RMantra Solutions Inc
analyzes Must be a self-starter, strong leader, and have the ability to work independently with little supervision. Basic Qualifications: Proficiency and/or knowledge of the following: Angular, JavaScript, CSS, & HTML, & Material UI, JAVA etc AWS Cloud, EKS, Kubernetes, Kafka, Jenkins, Ansible, Docker, GIT, Red Hat Enterprise Linux (RHEL) Oracle/MySQL/Postgres, microservices, Springboot, Java. KABANA or More ❯
Employment Type: Permanent
Salary: USD Annual
Posted:

Cloud Technical Lead with Security Clearance

Ashburn, Virginia, United States
Take2 Consulting
effectiveness analysis • Must be a self-starter, strong leader, and have the ability to work independently with little supervision. • Proficiency and/or knowledge of the following: o Angular, JavaScript, CSS, & HTML, & Material UI, JAVA etc o AWS Cloud, EKS, Kubernetes, Kafka, Jenkins, Ansible, Docker, GIT, Red Hat Enterprise Linux (RHEL) o Oracle/MySQL/Postgres, microservices, Springboot, Java. More ❯
Employment Type: Permanent
Salary: USD Annual
Posted:

Software Developer (Full Stack)

London, United Kingdom
Hybrid / WFH Options
Marlowe Src
strive for improvement by being open to challenge, being curious and focussing on innovation. In order to excel in this role you need 3+ years' strong programming experience in JavaScript Knowledge of Java, HTML, APIs, MySQL , and cloud environments (AWS preferred) Experience with Kubernetes/Docker Strong analytical, numeracy, problem-solving, and time-management skills Ability to work collaboratively within More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior .Net developer

Manchester, United Kingdom
Hybrid / WFH Options
Invitise
to Work or have the ability to work without sponsorship. The successful Senior .Net Developer will possess proven skills in: C# and .NET (Core/Framework) Angular (or modern JavaScript front-end frameworks) SQL Server and Entity Framework Docker & AWS ECS Architecture & Design Event-driven architecture (e.g. RabbitMQ) RESTful APIs and microservices DevOps, Git, CI/CD pipelines Interested? Please More ❯
Employment Type: Permanent
Salary: £50000 - £60000/annum + Great Benefits
Posted:

Full Stack Developer

London, South East, England, United Kingdom
Harnham - Data & Analytics Recruitment
security, accessibility, and testing across the codebase Support platform improvements and contribute to continuous delivery practices Skills & Experience Required Strong experience in full stack development using React , Next.js , and JavaScript/TypeScript Proven backend engineering skills using Node.js and/or modern languages like Python , Ruby , Scala , or Rust Solid understanding of API design and integration Track record of delivering More ❯
Employment Type: Contractor
Rate: £400 - £450 per day
Posted:

Senior Software Engineer

Leeds, West Yorkshire, Yorkshire, United Kingdom
Hybrid / WFH Options
Oscar Associates (UK) Limited
require you to be onsite a minimum of two days per week. Essential Experience: Professional software engineering experience (typically 5+ years) using C#/ASP.NET (Core & Framework) and modern JavaScript/TypeScript frameworks, particularly Angular (v8+). Significant understanding and practical experience with relational databases (MySQL/PostgreSQL preferred). Expertise in version control systems (Git) and branching strategies (Gitflow More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
Posted:

Senior Software Engineer

Banbury, Oxfordshire, South East, United Kingdom
Hybrid / WFH Options
Oscar Associates (UK) Limited
require you to be onsite a minimum of two days per week. Essential Experience: Professional software engineering experience (typically 5+ years) using C#/ASP.NET (Core & Framework) and modern JavaScript/TypeScript frameworks, particularly Angular (v8+). Significant understanding and practical experience with relational databases (MySQL/PostgreSQL preferred). Expertise in version control systems (Git) and branching strategies (Gitflow More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
Posted:

Senior Engineer - AWS

London, South East, England, United Kingdom
Robert Walters
the team. Ensure all customers and stakeholders are treated fairly and with respect. What we're looking for Technology-focused degree preferred, or equivalent demonstrable experience. Extensive knowledge of: JavaScript, TypeScript, NodeJS, AWS SDK & CDK, Python, React, HTML/CSS, Java, Spring, Terraform/CloudFormation Hands-on experience: Building serverless applications in AWS Building microservices in Java (Spring Boot) Strong More ❯
Employment Type: Full-Time
Salary: £80,000 - £90,000 per annum
Posted:

.NET Developer

City of London, London, England, United Kingdom
Hybrid / WFH Options
Noir
software solutions. .NET Developer applicants should have commercial experience with: .NET, .NET Core/ASP.NET MVC, C#, Azure SQL and Agile. Full training will be provided into: .NET 9, JavaScript, React, Angular 19, Microservices, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. If you are dedicated to the youthful optimism More ❯
Employment Type: Full-Time
Salary: £40,000 - £50,000 per annum
Posted:

.NET Developer - Derby

Derby, England, United Kingdom
Hybrid / WFH Options
Noir
software solutions. .NET Developer applicants should have commercial experience with: .NET, .NET Core/ASP.NET MVC, C#, Azure SQL and Agile. Full training will be provided into: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. If you are dedicated to the youthful More ❯
Posted:

.NET Developer

Derby, Derbyshire, England, United Kingdom
Hybrid / WFH Options
Noir
software solutions. .NET Developer applicants should have commercial experience with: .NET, .NET Core/ASP.NET MVC, C#, Azure SQL and Agile. Full training will be provided into: .NET 9, JavaScript, React, Angular 19, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. If you are dedicated to the youthful More ❯
Employment Type: Full-Time
Salary: £45,000 - £60,000 per annum
Posted:

.NET Developer - West Malling

West Malling, Kent, England, United Kingdom
Hybrid / WFH Options
Noir
software solutions. .NET Developer applicants should have commercial experience with: .NET, .NET Core/ASP.NET MVC, C#, Azure SQL and Agile. Full training will be provided into: .NET 9, JavaScript, React, Angular 19, Microservices, Vue.js, TypeScript, Azure, AWS, Web API 2, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. If you are dedicated to the youthful optimism More ❯
Employment Type: Full-Time
Salary: £25,000 - £30,000 per annum
Posted: