Top Software Engineer Jobs in Spain

Design and evolve core control, data, and observability systems; implement resilient region-spanning architectures; build libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, and testing; and shape platform capabilities across identity, scheduling, observability, and distributed state management.

Design, implement, and manage LiveKit's infrastructure, focusing on performance, reliability, and automation while ensuring effective incident management and coordination with vendors.

The role involves designing and evolving core systems at LiveKit, implementing resilient architectures, and building tools to enhance system reliability and developer speed. Strong distributed systems experience and programming skills are essential.

Design, implement, and operate low-latency, highly available distributed control, data, and observability systems. Build region-spanning architectures, libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, testing, and real traffic; and shape platform capabilities around identity, scheduling, observability, and distributed state management.

Design and implement scalable backend services and APIs with tight AI/LLM integration. Collaborate with product and data science teams to operationalize models, deploy microservices (Docker/Kubernetes), maintain CI/CD and reliability, mentor junior engineers, drive technical best practices, ensure security and compliance, and lead feature development and documentation.

Design, implement, and maintain scalable backend services and APIs with LLM/AI integration. Collaborate cross-functionally to operationalize AI models, lead projects, mentor engineers, ensure reliability, security, and CI/CD-driven deployments, and drive technical best practices.

Work as a Senior Software Engineer on a large-scale Ruby on Rails product: collaborate with product, implement and review code, prepare integration plans and estimates, run tests, and help define the roadmap while supporting rapid experimentation and scaling.

The role involves translating requirements into technical solutions, developing features, modernizing applications, resolving defects, and maintaining software in a DevOps environment.

Lead the development and maintenance of applications using .NET and Python, manage CI/CD pipelines, and collaborate in Agile environments while coaching junior members.

The Senior Software Development Engineer in Test will design, develop, and maintain automation test frameworks, guide test strategies, and collaborate with multiple teams to ensure software quality.

Lead design, development, and delivery of test automation frameworks and E2E test strategies for N-tier services and data platforms. Collaborate with Product, SW Engineering, DevOps to implement CI/CD/TDD, write and automate functional and data validation tests, manage defects, and ensure reliability and performance. Estimate tasks, document results, and support root-cause data analysis within Agile teams.

Develop, design, and maintain automated test tools and frameworks. Create and execute functional and data validation tests, collaborate with engineering and DevOps for CI/CD and test environments, influence product design for testability, and analyze data to identify issues and ensure quality, performance, and reliability.

Lead the design and delivery of test automation frameworks for software platforms, ensuring quality and reliability through Agile practices. Collaborate across teams for effective development and QA processes, and drive the implementation of end-to-end testing strategies.

The Principal Software Engineer will lead technical development and maintenance of applications, promote standards, mentor team members, and ensure high-quality project delivery.

Responsible for delivering technical projects related to customer and internal applications, adhering to defined standards and high quality.

The role involves designing and implementing automation test frameworks for software platforms, coordinating with various teams, and conducting defect management within an Agile environment.

The role involves developing PHP applications, mentoring junior developers, managing software life cycle, and ensuring operational stability in an Agile team.

The Staff Tech Lead Software Engineer will drive technical vision, mentor teams, oversee code quality, and facilitate collaboration between engineering and product teams.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

The Senior Software Engineer will build integrations with external APIs, optimize code performance, and maintain testing protocols. A focus on backend development is essential.

Lead design and implementation of ECG signal‑processing algorithms and embedded software for medical devices. Develop and validate real‑time, low‑power algorithms, support design transfer to production firmware and cloud systems, ensure regulatory compliance (IEC 62304, ISO 13485, ISO 14971), and collaborate with hardware, clinical, QA/RA teams for documentation and validation.

Develop and maintain embedded software for RF and data converter products, collaborate across teams, and debug complex system issues.

Lead architecture and implementation of platform modernization from a .NET monolith toward a unified Java/Spring stack. Design zero-downtime migration patterns, build and transition services, collaborate with product and distributed teams, implement observability with Grafana and tracing, and leverage agentic programming tools to accelerate refactoring and development.

The Staff Software Engineer will design and manage end-to-end data pipelines, ensuring data quality and governance while collaborating across Java and Python systems, including event schema design and AI tooling.

Join a remote EU-based game studio talent pipeline as a senior C++ engineer working in custom engines or UE5. Maintain and develop game features and tools, collaborate across disciplines, and regularly debug, profile, and optimize code. Candidates may be contacted for future openings and will complete a technical test.