Top Software Engineer Jobs in Spain

As a Staff Software Engineer, you will define engineering vision, lead large projects, ensure code quality, and mentor engineers while enhancing the scalability of the platform.

Lead and deliver quarterly goals for a backend team building low-latency payment and ledger systems. Design, implement, and operate scalable backend services, collaborate with product/design/analytics, own on-call and availability, set code/design standards, and mentor engineers.

Lead backend engineering for EU cards: set technical strategy, design low-latency transaction and ledgering systems, ensure operational reliability (monitoring, on-call, playbooks), collaborate cross-functionally, mentor engineers, and drive code and design quality across teams.

Develop and maintain embedded Linux applications for electrical power devices, implement web services (backend and UI), deploy on Linux, enforce security measures, follow QoS processes, use GitLab/Redmine, participate in Agile ceremonies, and support testing, documentation, and mentoring.

Develop accurate functional models and simulations for System-on-Chip designs within Marvell’s Virtual Platforms team. Collaborate with software and firmware teams, analyze simulation results, diagnose firmware issues, and promote virtual platform adoption. The role requires Python and C++ knowledge, understanding of firmware and software architecture, and familiarity with computer architecture; simulator experience with Virtualizer, Simics, QEMU, or gem5 is preferred.

Design, build, and maintain performant React/Redux/Vite web applications and data-visualization portals. Collaborate across teams to implement features and RESTful APIs, write tests, perform code reviews, debug complex issues, follow agile and CI/CD practices, refine UX details, and adopt tooling to speed development.

Design, build, ship, and own high-scale, user-facing product features across frontend, backend, and data systems. Define problems, scope and prioritize work, collaborate with Product, monitor production usage, debug incidents, improve reliability, review code, and mentor engineers. The role requires strong backend expertise alongside React proficiency and ownership from product discovery through long-term maintenance.

Build and ship production AI agents that help mobile app developers manage subscriptions and paywalls. Own agent orchestration, tool execution, context management, evaluation, observability, permissions, and human-in-the-loop controls. Develop reliable, secure, user-facing backend systems, scope projects independently, monitor adoption, improve features after launch, participate in architecture and incident response, and mentor engineers.

The Software Engineer will develop backend systems using Rust, manage multimodal data, and improve data infrastructure with a focus on performance and design ownership.

Own and resolve production customer issues end-to-end: debug integrations, browser JS, agents and prompts, and database issues. Communicate directly with customers, build automation and runbooks to prevent recurrence, surface recurring patterns to Product, and raise team capability through tools and documentation.

The role involves building and maintaining integration services, designing monitoring solutions, delivering end-to-end software solutions, analyzing business processes, and collaborating with stakeholders to implement technical solutions while ensuring code quality and supporting team goals.

Design and implement features for scalable games, ensuring quality, performance, and security, while collaborating in an agile environment.

Canonical seeks open-source enthusiasts to optimize Ubuntu for new silicon technologies, collaborating with teams and customers to enhance software quality and performance across various platforms.

Design and build scalable backend services using Node.js and MongoDB. Collaborate with teams for technical solutions, and ensure reliable architecture with clean code.

Design and develop services for automating work with a large server fleet while engaging in DevOps processes.

Design and develop services for monitoring servers, improve metrics pipelines, automate maintenance workflows, and investigate incidents to ensure infrastructure reliability.

Develop functional System-on-Chip (SoC) simulation models, write embedded software to test and validate models, improve test automation and scripting, debug and refine models and test cases with the engineering team, and document work for knowledge sharing.

The role involves developing backend services using Python and Django, ensuring high availability and performance, and leveraging computer vision technology for 3D experiences in home decor.

Build and maintain high-performance, scalable PySpark data pipelines on Databricks, integrate and deploy ML models (MLflow), collaborate with product and technical leads, ensure maintainability and test coverage, and apply DDD/hexagonal architecture and LLM fine-tuning.

The role involves testing firmware, developing automated tests, ensuring correct software versions, and setting up test environments with a focus on security for ICS.

The Lead Golang Software Engineer develops server solutions, leads technical designs and code reviews, mentors colleagues, and ensures the quality of engineering practices in the Commercial Systems unit.

The Python Software Engineer will develop and maintain test automation tools for hardware certification and improve Linux testing methods.

You will build and maintain container images, automate CI/CD processes, engage with the community, and mentor junior team members in a collaborative environment.

Drive process improvement, coach colleagues, and manage features in a distributed system for cloud automation and software operations.

Lead Python Software Engineer responsible for developing solutions, collaborating on designs, mentoring team members, and enhancing engineering practices.