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UX/UI Design Intern — Barcelona Only — University Agreement Required

Open 21d RemoteEuropeInternshipIntern

UX/UI Design Intern creates user flows, wireframes, and prototypes for Carrots apps using Figma, collaborating with Product Owners, Developers, and Analysts to design experiences that impact activation, retention, and monetization while conducting UX research and testing.

A/B Testing Amplitude Android Figma Firebase +7 skills

Full Stack Engineer (hybrid or remote)

Open 21d Europe

Design and develop full-stack features for a hospitality ERP platform, working end-to-end from Angular frontend to PHP/Laravel backend with relational databases and AWS infrastructure.

Android Angular API AWS CI/CD +20 skills

45K – 65K €

Backend Developer, IA Generativa, Agentes Inteligentes, .NET

Open 21d Europe

Backend Developer role focusing on designing automated processes with UiPath, implementing Azure database solutions, and developing AI-integrated applications using .NET. Core technologies include .NET, UiPath, Microsoft Azure, SQL/NoSQL, and AI/ML.

AI Azure .NET LLM Machine Learning +4 skills

Backend Developer Node.js Nest

Open 21d Europe

Backend Developer using Node.js and Nest to develop and maintain backend applications, collaborate on APIs, integrations, testing, and deployments.

API CI/CD Node.js

Elpuertodesantamaria

León-based Senior Java Developer — Growth & Impact

Open 21d EuropeSenior

This role is for a Senior Java Developer at Elpuertodesantamaria in León, Spain, where the person will work with a dynamic team, focusing on Java development and contributing to the company's growth.

Backend Developer (Java + Spring) — Híbrido Madrid

Open 21d Europe

Develop scalable Java 17/Spring Boot backend services, APIs, and security mechanisms for a critical public sector SaaS platform, while refactoring legacy modules and optimizing MySQL databases.

API CI/CD Git Gradle Hibernate +7 skills

45K – 50K €

Tamarind Intelligence

Senior Backend Developer - Serverless, Scalable & Impactful

Open 21d EuropeSenior

Senior Backend Developer role focusing on JavaScript/TypeScript (Node.js, NestJS) to migrate to serverless AWS architecture, design scalable backend services, and optimize data in MySQL/DynamoDB with CI/CD practices.

AWS CI/CD DynamoDB JavaScript MySQL +4 skills

Mid-Level Backend Developer

Open 21d RemoteEuropeMiddle

Builds and refactors a Kotlin-based backend system using event sourcing for a health-insurance platform targeting digital nomads, collaborating with AI tools to improve reliability and scalability while navigating ambiguous business logic.

Agentic AI AI API Claude Code Event Driven Architecture +2 skills

up to 5K € / mo

Elpuertodesantamaria

Senior Java Developer - Crecimiento y Impacto

Open 21d EuropeSenior

Senior Java Developer working on challenging projects, collaborating with departments to optimize processes, using Java.

Java Developer, Wealth Management — Hybrid + Relocation

Open 21d Europe

Design, test, and deploy Java solutions for a wealth management client using REST, SQL, and Eclipse.

Eclipse Java SQL

CORUS Consulting

Senior Python Developer - REST APIs & Microservices

Open 21d HybridEuropeSenior

Senior Python Developer designing REST APIs and database solutions for an international insurance project using Python, ORMs, and async programming in a hybrid role.

API Api Design Django Python REST

CORUS Consulting

Python Developer

Open 21d Europe

Senior Python Developer designing RESTful APIs, architecting database solutions with ORMs like SQLAlchemy, and implementing microservices for an international insurance project.

API Api Design CI/CD Design Patterns Django +5 skills

SEREM Consultoría Empresarial

Desarrollador Backend Java - 80% Remoto + Reunión Semanal

Open 21d Europe

SEREM Consultoría Empresarial busca un Desarrollador Backend Java para un proyecto tecnológico estable. Se anima a todos los posibles solicitantes a que se desplacen y lean la descripción completa del puesto antes de…

Hibernate Java JPA Oracle Spring

Data Engineer

Open 21d Europe

En ALTEN tenemos claro que el éxito de nuestros proyectos se debe a las personas que forman nuestro equipo. Por eso, si tienes experiencia como ingeniero/a de datos, nos comprometemos a impulsar tu talento, satisfacer…

Cloud dbt GCP Python SQL

Analista / Programador Senior Full Stack

Open 21d EuropeSenior

Senior Full Stack Developer role analyzing requirements and designing multi-layer applications using Java, Spring, React, and Angular within a hybrid work model in Madrid.

Angular API CI/CD Git GitLab +9 skills

Senior Full Stack Developer

Open 21d EuropeSenior

Senior Full Stack Developer building robust, scalable web applications for large corporations using Java/Spring on the backend and Angular on the frontend, working on-site in Barcelona in an agile, collaborative team.

Angular API Cloud CSS Cypress +9 skills

Senior DevOps Engineer, 100% En remoto

Open 21d APAC, EuropeSenior

Senior DevOps Engineer Habilidades, experiencia, cualificaciones... Si tiene el perfil adecuado para esta oportunidad, asegúrese de inscribirse hoy mismo. We are still looking for the very Top Talent and we would be…

Agile AI Automation AWS Azure +22 skills

Developer Backend Laravel - M/H/NB

Open 21d Europe

Backend Laravel developer building and maintaining a SaaS ecosystem for restaurants, commerce, and services using Laravel, Vue 3/TypeScript, Livewire, REST APIs, and multi-tenant architectures.

API Laravel SaaS TypeScript Vue

FRG Technology Consulting

Data Engineer AWS

Open 21d HybridEurope

A Data Engineer role focused on AWS, responsible for building and maintaining data solutions, including ETL processes, data modeling, and leveraging AWS services and data warehousing technologies.

AWS Cloud Data Engineering Data Modeling Data Warehousing +2 skills

Data Scientist – Remote, AI-Driven Analytics & Pipelines

Open 21d Europe

Designs and optimizes data pipelines, ensures data accuracy, and builds internal AI-driven analytics tools for product teams to support company-wide decision-making.

AI Data Pipelines