637 javascript English-speaking jobs in Portugal
JavaScript Security Engineer - Web Browser Vulnerabilities (Hybrid - Lisbon)
- Cognizant Technology Solutions
- Portugal
- May 2
JavaScript Security Engineer - Web Browser Vulnerabilities English Required / Based in Lisbon, Portugal ... / HybridWe are seeking a skilled JavaScript and cyber‐security professional to analyze, reverse engineer ... as React, Angular, or jQuery.Strong code reverse engineering and debugging skills, particularly in JavaScript ... and maintain clear technical documentation.You are someone who bringsStrong hands‐on experience with JavaScript ... security violations and malicious behaviour.Perform code reverse engineering and debugging, primarily in JavaScript‐based
JavaScript Security Engineer - Web Browser Vulnerabilities (Hybrid - Lisbon)
- Cognizant
- Portugal
- April 30
JavaScript Security Engineer - Web Browser Vulnerabilities English Required / Based in Lisbon, Portugal ... / HybridWe are seeking a skilled JavaScript Security Engineer with a strong background in web technologies ... static and dynamic analysis techniques to detect security violations and malicious behavior.Perform JavaScript ... Angular, or jQuery.Strong code analysis, debugging, and reverse engineering skills, particularly in JavaScript ... improvement of security workflows and tooling.You Are Someone Who BringsStrong hands‐on experience with JavaScript
Senior Fullstack Developer (Node.Js + React)
- Trinetix
- Lisbon
- May 9
We are seeking a passionate and skilledFull-Stack JavaScript Developerto join our team. ... efficient, and user-friendly applications.Requirements5 years of professional experience as a Full-Stack JavaScript
Fullstack .Net Developer
- bridge351
- Portugal
- May 6
Required ExperienceAt least 2 years of experience in .NET.At least 3 years of experience in JavaScript ... SkillsExcellent knowledge of .NET 10 and .NET Framework (C#) server‐side programming.Excellent knowledge of JavaScript
Javascript Developer
- HumanIT
- Porto
- May 7
Software developer to join a team building advanced platforms and services. Experience with Node.js, Express, MongoDB, and Redis is required.
Low-Code Automation Engineer - Freelance AI Trainer
- Mindrift
- Porto
- May 1
Mindrift is looking for skilledLow-Code Automation Engineers (Make.com / n8n, JavaScript)to join the ... professionals with hands‐on experience in low-code automation platforms, workflow architecture, and JavaScript-based ... workflows using low-code platforms (Make.com, n8n), APIs, webhooks, and event-based logicImplement custom JavaScript
JavaScript / TypeScript Developer
- Aubay Portugal
- Lisbon
- May 6
Software Engineer with 4+ years of experience building REST APIs and working with authentication. Experience with WebAssembly, web security, databases, and CI/CD workflows is required. Familiarity with containerized environments and cloud platforms is a plus.
Javascript Lead Developer
- Emergn
- Portugal
- May 2
Lead Javascript Developer to collaborate on project scope, architecture, and delivery timelines. Conduct code reviews, enforce coding standards, and troubleshoot applications. Requires strong React knowledge, experience with Ruby on Rails, TypeScript, Redux, PostgreSQL, Docker, and OpenAI. Must have excellent English communication skills.
JavaScript / TypeScript Engineer (React)
- Evolution Gaming Limited
- Lisbon
- April 30
We are searching for passionate JavaScript / TypeScript engineers to take an integral part in building ... development, and improving yourself technically;Proven experience in delivering production software using JavaScript ... contemporary programming trends such as functional and reactive programming, CSS preprocessing, alternative JavaScript ... specifications libraries like Jest, Enzyme, Puppeteer/PlayWright, WebDriverIO, Cucumber, Mocha.Knowledge of JavaScript
Javascript Senior Software Engineer (AI Apps)
- Tether.io
- Lisbon
- April 29
. +6 years of experience working with Nodejs/JavaScript.
TIBCO Spotfire Senior Developer
- emagine
- Lisbon
- April 29
Develop and maintain advanced TIBCO Spotfire dashboards, data models, and integrations. Implement complex logic using Spotfire Expressions, IronPython, JavaScript, and the Spotfire SDK. Optimize reports for large data volumes.
Senior Frontend Software Engineer, Javascript
- PVComplete
- Portugal
- April 30
Deep understanding of the browser and UI development in JavaScript Knowledge of REST API best practices ... You should be comfortable writing vanilla JavaScript, as well as using Angular, React, or a similar frontend ... Your primary code contribution will come in the form of frontend JavaScript code, with periodic contributions ... + years professional experience developing and delivering commercial software Expert level skill in JavaScript ... languages Knowledge of object‐oriented programming best practices and the ability to realize them in JavaScript
Full Stack Developer - Symfony And Javascript | Permanent Contract
- Rise Up
- Coimbra
- May 9
Full Stack Developer (50% Front End – 50% Back End) needed for hybrid projects. Requires 3+ years experience in software development with Java (Backend) and React/Redux/ES6/LESS (Frontend). Must have experience with PostgreSQL/SQL Server, Elasticsearch, Git, K8S, Teamcity, Octopus Deploy, Docker, and Kubernetes. Fluent English required.
Full-Stack Developer (PHP & JavaScript)
- InnoTech
- Portugal
- May 3
Full-Stack Developer to build scalable features for an application marketplace, including dashboards, APIs, and user-facing components. Collaborate with teams to translate requirements into high-quality deliverables. Ensure code quality through testing, reviews, and adherence to best practices.
Fullstack Engineer
- Promptly Health
- Lisbon
- May 7
, TypeScript, Node, Python, Django, Kafka Experience with frontend JavaScript libraries such as React ... job QualificationsProficient on the base Full-Stack development technologies, including HTML5/CSS3/JavaScript
Javascript AUTOMATION TESTER (QAE) (HYBRID @Porto)
- KCS iT
- Portugal
- May 3
We are seeking a QA Automation Tester with 5+ years of experience in software testing and automation. The ideal candidate will have experience with Selenium, CI/CD pipelines, and version control systems like Git. Excellent problem-solving, communication, and teamwork skills are required. Proficiency in English is mandatory.
Technical Developer – Dynamics 365 Customer Service (JavaScript & CIF, Europe)
- Talent Connect
- Lisbon
- February 24
Frontend Developer in Porto (m/f/d)
- mgm Germany
- Portugal
- May 3
and TypescriptDevelopment for various devices and operating systemsWhat you should bringHTML, CSS, JavaScript
Full Stack Developer - Mosano
- Mosano
- Porto
- May 1
Developer; Strong proficiency in JavaScript and TypeScript; Solid experience with React (and optionally ... ResponsibilitiesDevelop and maintain scalable web applications using JavaScript/TypeScript; Build responsive ... Troubleshoot, debug, and optimize application performance; Ideal Profile3+ years of experience as a Fullstack JavaScript
.Net Fullstack Developer - Up To €65.000 A Year
- Adentis Portugal
- Portugal
- May 4
Senior Frontend Developer to join a leading IT consultancy in Lisbon. Develop and maintain web applications using ReactJS, NextJS, HTML, CSS, TypeScript, and JavaScript. Minimum 5 years of professional experience in modern front-end technologies required. English proficiency at least B2 level.















































