Top Software Engineer Jobs in Spain

Design, build, and operate scalable, secure, event-driven backend services for mobile apps. Own end-to-end development lifecycle, improve architecture and CI/CD, write robust tests, mentor engineers, lead incident response, and integrate AI-assisted developer tools.

Build and ship full-stack, production-grade scalable systems across backend and frontend. Own end-to-end feature delivery from requirements to deployment and monitoring. Apply strong system design, product-first judgment, high-velocity development practices, and clear cross-functional communication to deliver high-impact AI-enabled fintech features.

As a Senior Software Engineer at Perk, you'll own feature lifecycles, contribute to system architecture, mentor colleagues, and prioritize engineering excellence through collaborative, AI-driven development across teams.

As a Senior Software Engineer, you will design and maintain integration systems, manage user provisioning, optimize integrations, and collaborate with cross-functional teams and enterprise customers.

The Senior Software Engineer will design and oversee identity and authentication systems, mentor peers, and contribute to technical roadmaps, ensuring the integration of security within user management systems.

As a Software Engineer for the Identity Platform, you will modernize user identity systems, develop backend services in Java, work on compliance workflows, and improve system reliability while collaborating across teams to meet regulatory requirements.

Join a growing team as a Junior Java Software Engineer, designing and coding Java applications, participating in Agile development, and ensuring code quality through TDD.

The Senior Developer will design, develop, and maintain software solutions in Golang, collaborating with cross-functional teams to ensure code quality and system reliability while adhering to best practices.

Full-stack Developers at QuantCo build user interfaces for machine learning solutions, collaborating with data scientists and engineers to deliver actionable products.

The AI Full Stack Software Engineer will design and develop applications for AI initiatives. Responsibilities include building user interfaces, backend services, and integrating AI applications with other systems while ensuring security and compliance.

The Senior Software Engineer will lead the development of the payments experience at Perk, ensuring reliability and user satisfaction by building and maintaining the system for payment processing, refunds, and fintech integrations, while collaborating with cross-functional teams and mentoring peers.

The Senior Software Engineer will design and develop full-stack applications, collaborating with teams to translate requirements into solutions, ensuring performance and reliability while mentoring junior engineers.

The Software Engineer will develop and maintain web applications visualizing sustainability data, contributing to global conservation efforts. Ideal for entry-level candidates with a recent degree.

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

Lead design and development of low-level Linux instrumentation and eBPF-based runtime security features for detection, monitoring, and workload protection. Drive architecture, implement performance-sensitive systems, establish testing methodologies, deliver end-to-end features, and provide technical leadership and cross-team collaboration across Datadog's security products.

As a Software Engineer, you will develop systems for financial data integrity, automate reconciliations and reporting, and support ERP integrations.

As a Senior Software Engineer, you will build scalable systems, mentor engineers, and ensure high availability of data pipelines, collaborating with cross-functional teams.

The role involves optimizing hardware support within a software stack for AI model deployment, collaborating with teams and hardware vendors to enhance performance and portability across platforms.

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.

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, secure .NET-based web applications and REST APIs. Partner with multidisciplinary teams and clients to translate requirements into high-quality solutions, using Azure services and ORM technologies like Entity Framework. Advocate for modern practices, contribute to architecture, and support continuous learning and product development.

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.

Build and operate agentic AI systems and features from prototype to production within a serverless AWS environment. Design orchestration, memory, durable state, failure recovery, and evaluation frameworks. Collaborate with product and domain engineers to identify AI opportunities, manage operational economics (latency, token cost), and contribute org-wide AI patterns, tooling, and standards.

Build and ship full‑stack features for North, an enterprise AI workspace. Develop secure autonomous agents, execution engines, integrations, observability and evaluation systems. Collaborate with researchers to productionize models and deliver performant, low‑resource deployment code while adhering to strict security and privacy constraints.

Develop, prototype, and deploy sensor calibration algorithms and tooling for autonomous mobile robots. Write and maintain high-quality C++, Python (and Rust) code, debug calibration issues, perform root-cause analysis, and deploy solutions on ARM64 SoCs while collaborating with global teams and SLAM experts.