Top Software Engineer Jobs in Barcelona

Design and build scalable Java backend services for Paymentology's global payments infrastructure, leading end-to-end delivery and mentoring engineers.

As a Senior Software Engineer, you will lead API development, enhance integrations, and mentor junior engineers while focusing on reliability and scalability.

The role involves developing backend applications, collaborating with cross-functional teams, troubleshooting issues, leading initiatives, and raising expertise in engineering practices.

Design and develop high-impact web applications for a B2C trading platform, ensuring performance, reliability, and security while mentoring other engineers.

Lead design of real-time security detection components, build scalable services in Go, mentor engineers, and contribute to technical strategy.

Design and develop RESTful APIs for employment verification and financial data processing, ensuring security and scalability while documenting integrations.

As a Staff Unity Client Engineer, you will develop game features and components, collaborate with teams, and resolve issues related to Unity3D mobile game development.

The role involves enhancing search functionality in Elasticsearch, leading initiatives, collaborating with a global team, and developing in Java.

Lead the design and development of scalable backend APIs and services focusing on IBM Cloud, providing technical leadership and collaborating with cross-functional teams.

Design and scale AI systems for healthcare conversations, ensuring low-latency performance and reliable orchestration of speech and LLM pipelines.

As a Senior Software Engineer, you will develop and optimize services for the Blacklane platform, uphold coding standards, collaborate within agile teams, and leverage your expertise in various backend technologies.

As a Mid-Senior Software Engineer at Smadex, you will design and implement features, ensure code quality, and maintain system performance in a collaborative environment.

As a Senior Software Engineer in AI/ML, you'll design, develop, and enhance software for autonomous robotic inspections, optimize ML systems, and collaborate with cross-functional teams.

The Senior Software Engineer will develop and enhance high-volume payment systems, designing solutions, optimizing performance, and ensuring compliance with specifications while fostering continuous improvement.

The Senior Software Engineer will develop high-volume applications, enhance performance, and implement new features for payment systems, collaborating through all development phases.

Build and lead development of Grafana Cloud observability integrations and Kubernetes monitoring. Design scalable ingestion pipelines, middleware, dashboards, and alerts; operate production services, mentor engineers, contribute to OSS, and collaborate across product, sales, and support to deliver reliable observability experiences.

The Technical Lead will design and implement architecture for Java applications, collaborate with teams, optimize performance, and ensure code quality.

The Senior Software Engineer will lead the development of a Python-based platform, enhancing a mature system for open-source collaboration, mentoring teams, and driving innovation.

As a Senior Software Engineer, you will develop, maintain, and support a documentation platform, integrating AI tools for efficiency while collaborating with various stakeholders.

Design and build backend systems for Quadrivia's clinical AI platform, ensuring reliability, high availability, and compliance with healthcare regulations while collaborating with cross-functional teams.

Lead development, integration, support and maintenance of content-processing and editorial backend applications. Own full SDLC: design, implement, test (unit, performance, stress), deploy and operate software. Drive technical decisions, practice Agile, and work with .NET/C#, SQL Server, cloud, containers, and IaC tools.

Design, implement, and operate internal and edge networking infrastructure at global scale. Build services, tools, and automation exposing network functionality, drive cross-team initiatives, research routing/failover/scaling, and participate in on-call rotation.

As a Senior Software Engineer at Bitpanda, you will design and develop scalable back-end systems using Java, integrate with 3rd party vendors, and optimize system performance, reliability, and scalability.

Lead integration architecture and hands-on development for a global experimentation platform. Ensure consistent SDK implementations, resolve integration/data issues, define standards, and evolve feature-flagging and configuration services across backend, web, and mobile.

Technical leader for the Platform Tribe who designs, builds, and operates platform services. Drives cross-squad initiatives (CI/CD, delivery workflows), improves reliability (SLOs, observability, runbooks), leads incident response, mentors engineers, and implements durable automation and operational standards.