Empleos de junior software engineer java en Barcelona

Senior Backend Engineer (Java & APIs REST) Buscamos un perfil senior especializado en desarrollo backend con Java y Spring Boot, enfocado en el diseño e implementación de APIs REST y en la integración con sistemas legacy (DB2). Principales responsabilidades * Desarrollar servicios backend robustos utilizando Java y Spring Boot. * Diseñar, definir y...

UST Spain & Latam is seeking a Senior Java Engineer to contribute to a project with a global customer in the financial services sector. You will design, build and maintain scalable software within a DevOps model, owning the delivery and operation of features. The role requires strong Java skills, API development expertise, experience with REST and...

Elastic, a distributed company, is seeking a Senior Software Engineer to join the Elasticsearch - Search Relevance team. You will help shape the technical direction, design and implement new search features, and tackle challenging bugs to improve speed and relevance. You will work with a globally distributed team focused on vector search capabilities,...

Applus+ Laboratories, the IT & Cybersecurity laboratory division of the Applus+ Group, seeks a Junior Cybersecurity Engineer to perform vulnerability analyses and penetration testing on real hardware and software products. You will analyze source code and use reverse engineering techniques. You will join a team focused on security evaluations for payment...

**¿Te apetece un nuevo reto?** Buscamos personas interesadas en analizar las nuevas funcionalidades **a desarrollar en proyectos con gran impacto sanitario** . En #NTTDATAHealthcare tenemos vocación para liderar la transformación del sector enfrentándonos a los **nuevos retos sanitarios** , apoyándonos en el conocimiento propio e invirtiendo en la...

A leading software provider in the automotive industry is looking for a seasoned backend engineer to join their remote team from Spain. You will develop and maintain Spring Boot services, work with event-driven architectures using AWS, and ensure secure API integrations. Ideal candidates have over 8 years of experience in backend development, particularly...

Metyis is growing! We are looking for an intern to start their professional journey with us, within our Data and Analytics team, based in Barcelona or Madrid. **Who We Are** Metyis is a global and forward-thinking firm operating across a wide range of industries, developing and delivering AI & Data, Digital Commerce, Marketing & Design solutions and...

# **2 Scientific Data Engineers** Reference 2027-FIX-05 & 2026-FIX-35 Deadline 04/11/2026 Division Computing #### **Institution** ALBA is the Spanish synchrotron light source, a large research infrastructure operating thirteen beamlines, complementary facilities, and an Electron Microscopy Center, this last in partnership with other institutions....

Overview As a Senior Java Full Stack Engineer, you will join a greenfield fashion retail project to design, build, and evolve a new digital product from scratch. You will define architecture, implement core capabilities, and deliver an MVP that drives real business value, collaborating with Spanish-speaking stakeholders. You’ll work hands-on across...

About Neo4j Neo4j is the graph intelligence platform that transforms data into knowledge to power the next generation of intelligent applications and AI systems. It includes enterprise-ready knowledge graphs for accurate, explainable, and governed AI; the most comprehensive, trusted, and easy-to-deploy graph capabilities across any environment and data...

The Opportunity: We are looking for a highly capable Senior Android Engineer to join our Powered team and take ownership of our Android SDKs: the CQoE SDK, which telecom carriers and partners embed directly into their own apps to passively measure real-world network quality, and the Speedtest SDK, the core measurement library that powers every Speedtest...

Principal Software Engineer - Performance Tuning - Elasticsearch Spain Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of...

Overview In this Senior Full Stack Engineer role, you own end-to-end delivery for Duetto’s core revenue platform, driving a major monolith-to-microservices migration. You’ll work across Java/Spring Boot backends and TypeScript/React frontends, shaping scalable systems and high-quality user experiences. You’ll operate with strong architectural judgment,...

Actualmente, tenemos un puesto vacante para un/a profesional Senior Java con amplia experiencia con Microservicios y que haya trabajado con metodología TDD. Además, podrás trabajar con otras tecnologías como Kafka, Cloud, CI/CD, etc. Buscamos una persona entusiasta y dinámica con interés en trabajar en nuestra área de proyectos internacionales. Por...

Smadex is a cutting-edge ad-tech company: we process more than 4,5 million ad requests per second, replying under 100ms (for reference, the Google search engine handles ~76,000 QPS). Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to help us keep our...

Overview As a Senior Infrastructure & Cloud Engineer, you design, implement, and operate scalable, secure infrastructure across AWS and on-premises. You will evolve Fever’s hybrid cloud strategy and support critical services at scale, collaborating across Platform Engineering, Security, DevOps, and Software Engineering. You’ll balance hands-on delivery...

Smadex is a cutting-edge ad-tech company: we process more than 4,5 million ad requests per second , replying under 100ms (for reference, the Google search engine handles ~76,000 QPS). Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to...

**About Codeway** Codeway builds category-leading consumer AI apps on mobile and web, at global scale. 600M+ downloads. 60+ apps. 400+ builders across Barcelona and İstanbul. Completely bootstrapped. No board. Profitable since year two. Small teams move faster than big ones. But they need big resources to win at scale. Nobody starts from zero....

Job Summary The Full Stack Engineer Annotator will assess frontend and backend engineering datasets, ensuring AI models correctly interpret full-stack workflows, architecture, and implementation patterns. Job Responsibilities * Annotate full-stack application datasets. * Evaluate frontend and backend integration logic. * Review UI interaction with APIs and...

Junior Java Software Engineer Community (Spain) Barcelona, SpainWe Dream. About MerkleMerkle, a dentsu company, powers the experience economy. For more than 35 years, we have put people at the heart of its approach to digital business transformation. As the only integrated experience consultancy in the world with a heritage in data science and our...