Top Software Engineer Jobs in Barcelona

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.

The Senior Software Engineer will design and implement web applications, enhance existing architectures, mentor engineers, and contribute to project planning and technical standards.

Build production AI-first features across backend (Python) and frontend (JavaScript/React). Design agentic architectures, implement LLM integrations and prompt-engineering frameworks, ensure data quality with SQL/PostgreSQL, champion AI-augmented development, implement testing and CI/CD, and mentor teammates on AI best practices.

The role involves engineering scalable software solutions, improving system automation, collaborating with teams, and leading engineering initiatives in a cloud environment.

The Lead Software Engineer will provide technical design, maintain the technical roadmap, document architectures, code, conduct reviews, mentor engineers, and support recruitment efforts.

As a Senior Software Engineer, you will lead your team in shipping features, making technical decisions, and mentoring others to scale products effectively.

As a Go Software Engineer for Identity Management, you will design, implement, and enhance identity management solutions, collaborate with a distributed team, and contribute to the development of authentication and authorization systems.

Design, build, and maintain internal platform services and developer productivity tools. Automate workflows, consolidate redundant tools, ensure reliability and security, participate in on-call rotation, and mentor teammates to improve developer experience and platform scalability.

Build and maintain core backend services and APIs (authentication, notifications, messaging) using Node/NestJS and Postgres. Produce well-tested, scalable, secure code, collaborate in Agile teams, advocate quality, and support cross-functional product delivery.

Lead a full-stack engineering team while spending ~30-40% time coding. Drive technical direction, mentor engineers, modernize backend systems, build scalable APIs/infrastructure (Node, React, AWS), and collaborate with Product and Design across the SDLC.

Build proactive and reactive customer-experience solutions across backend, frontend and AI. Design and implement RESTful APIs, event-driven services, and AI-powered automation (chatbots/voicebots). Collaborate cross-functionally, use data to validate impact, ensure test coverage, CI/CD, and observability for scalable, maintainable systems.

Design and develop scalable applications for data representation within SoC environments, manage cloud solutions, CI/CD pipelines, and support R&D teams with data processing.

As a Senior Software Engineer, you'll develop cross-platform libraries using Rust, collaborate with teams, and impact millions of users through software delivery.

Join Reedsy to develop and improve a collaborative word processor, adding features and ensuring performance and security for users.

The Senior Backend Developer will build and improve GOlang applications and microservices, enhance the execution engine, write efficient code, and aid in troubleshooting and system improvements.

Join dLocal as a Senior Software Engineer to design, develop, and deliver high-volume applications, ensuring compliance with specifications and supporting continuous improvement.

The role involves designing and implementing Python services and AI solutions, leading technical engagements, and mentoring engineers. Responsibilities include production-level coding, architecture decisions, and client interaction.