Full Stack Developer

Full Stack Developer

Valencia

Categoría: Desarrollador Web - Inteligencia Artificial/Machine Learning - Programador

Salario: ~

Empresa: PowerUp Global

Estudios: Bachillerato/COU

Experiencia: 2 años

Tipo de contrato: Indefinido

Jornada: Jornada completa

Fecha: 30/12/2025

Descripción: As PowerUp enters the next stage of our growth, we’re now looking to hire an ambitious, motivated Full Stack Developer In this role, you’ll work end-to-end across our web and mobile applications, internal telemetry pipelines, and customer-facing intelligence dashboards. You’ll collaborate closely with our CTO to build secure, scalable systems that will support rapid growth - and help set the foundation for an engineering team as we expand.
PowerUp is building toward an agent-first architecture where AI becomes the primary interface for users. You´ll help ensure our applications can surface data to AI agents, support conversational interactions, and integrate with AI services.

What you’ll do:
• Design, implement, test, and maintain features end-to-end across frontend, backend, services, and supporting data layers
• Build and evolve secure, scalable APIs and microservices
• Ensure robust data flow and integrations between systems, including ingestion and processing pipelines
• Contribute to architectural decisions with a focus on scalability, security, reliability, and customer experience
• Implement and improve engineering processes including code reviews, test coverage, documentation, and deployments
• Help set engineering standards, especially as the team grows
• Improve and extend existing systems as well as building new features – we value developers who read and understand code before rewriting it

Required
• Proven experience in full-stack development
• Strong expertise with Next.js, React + TypeScript
• Familiarity with iOS and Android mobile development (React, Native or similar)
• Solid backend experience with Node.js, python and/or Ruby
• Experience working with cloud environments (Azure strongly preferred)
• Comfortable with fast-paced, ambiguous startup environments where priorities evolve quickly
• Experience writing unit and integration tests, working with CI/CD, and automating deployments
• Knowledge of secure coding practices and modern API security approaches
• Excellent autonomy, ownership, and communication skills in a remote-first team
• Professional English proficiency (B2+ level)

Preferred
• Experience with Microsoft Data Platform components
• Experience with the Microsoft Azure App Service or similar cloud web platform.
• Experience integrating applications with LLM APIs (OpenAI, Claude, Gemini), SLMs or building lightweight agentic workflows. Understanding of how applications feed context to AI agents (RAG patterns, MCP servers, function calling).
• Understanding of UX principles, ability to work from Figma, and comfort translating user behaviour into intuitive UI
• Experience scaling systems to handle growth in users, data, or traffic
• Exposure to NoSQL databases (MongoDB) or experience supporting data migrations

Why PowerUp
• Remote-first, flexible working environment.
• A rare opportunity to join a high-potential start-up and directly influence product, technical direction, and culture.
• High ownership: your ideas will meaningfully shape the company’s trajectory.
• A team culture that values passion, autonomy, continuous learning, and collaborative problem-solving.
• A chance to build cutting-edge AI systems with meaningful real-world impact.
• The opportunity to shape your own career path as our team and product scale.

Details:
• Start date: ASAP
• Contract Duration: 3 months Contractor/FTE probation period with view to move into FTE
• Location: Valencia, Spain
• Competitive salary, with bi-annual salary reviews
• Annual performance bonus
• High growth career trajectory

Publicado 04-01-2026

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