> Markdown version of [/jobs/ext/1608165-senior-full-stack-developer-js-edtech](https://www.wearedevelopers.com/jobs/ext/1608165-senior-full-stack-developer-js-edtech). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Full Stack Developer Js - Edtech

- **Company:** Paradox En
- **Location:** Valencia, Spain
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Artificial Intelligence, Mobile Application Development, Learning Management Systems, Interaction Design, TypeScript, Tailwind, ReactJS, Caching, NestJS
- **Published:** July 31, 2026
- **Apply:** https://www.buscojobs.com.es/senior-full-stack-developer-js-edtech-en-valencia-ID-364398940

## About the Role

Must Have
3-6 years of full?stack development experience, or experience as a CTO of a startup.
Deep expertise in TypeScript & React.js (minimum 3 years).
Proficient in Tailwind CSS.
Strong AI mindset - actively integrating AI into workflows.
Passion for writing clean, maintainable, and scalable code.
Nice to Have
Experience with Nest.js.
Experience with LMS applications and mobile development.

## Description

Senior Full Stack Developer JS - EdTechParadox EN is looking for a senior full?stack developer to lead the next generation of our online learning platform.Location: Remote worldwide or in our offices in Dubai or Lisbon.French and English fluency is required.Employment type: Full?time.ResponsibilitiesBuild & InnovateDevelop new features that enhance the Paradox App and redefine how users learn online.Implement AI?driven functionalities that personalize the learning experience.Continuously test, iterate, and push boundaries to improve performance and usability.Collaborate with cross?functional teams to integrate feedback and rapidly iterate on new ideas.Scalability & PerformanceEnsure the application can handle large volumes of concurrent users while maintaining speed and reliability.Optimize resource usage and infrastructure costs without sacrificing performance.Leverage CDN and caching strategies to improve load times globally.User?Centered DesignWork closely with product and design teams to build intuitive, beautiful, and efficient user interfaces.Rapidly prototype features to test and refine customer experiences.Incorporate AI and automation to enhance user interactions.Problem Solving & TroubleshootingInvestigate and resolve technical challenges to ensure a seamless user journey.Analyze recurring issues and proactively implement solutions to prevent future problems.Work across teams to ensure a stable and efficient system.Collaboration & CommunicationActively participate in tech architecture discussions and planning sessions.Provide and seek constructive feedback to continually improve the development process.Work within Agile frameworks to ensure timely and high?quality delivery.Must Have3-6 years of full?stack development experience, or experience as a CTO of a startup.Deep expertise in TypeScript & React.js (minimum 3 years).Proficient in Tailwind CSS.Strong AI mindset - actively integrating AI into workflows.Passion for writing clean, maintainable, and scalable code.Nice to HaveExperience with Nest.js.Experience with LMS applications and mobile development.BenefitsRemote or hybrid work with flexible hours.Culture of autonomy, accountability, and continuous learning.Competitive compensation and allowances (e.g., gym, education budgets).One?to?one coaching and team?building activities.Modern office spaces in Dubai and Lisbon.Hiring ProcessOnline application survey and short video assignment.WhatsApp call with Talent Manager.Video call with Hiring Manager for technical discussion.Technical test and presentation.Culture?fit video call.Reference check.Join us if you crave growth, impact, and a mission?driven culture.#J-*****-Ljbffr


## Related Videos

- [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean)
- [WeAreDevelopers LIVE – AI, Freelancing, Keeping Up with Tech and More](https://www.wearedevelopers.com/videos/1786-wearedevelopers-live-ai-freelancing-keeping-up-with-tech-and-more)
- [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs)
- [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster)
- [Next, Nest, Nuxt… Nust?](https://www.wearedevelopers.com/videos/421-next-nest-nuxt-nust)
- [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling)

## Related Articles

- [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers)
- [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025)
- [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025)
- [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front)
- [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)
- [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)