Top Software Engineer Jobs in Spain

Own the automation domain for Nexthink’s Product organization by designing, developing, and maintaining production-grade automation workflows. Integrate systems through APIs, Microsoft Power Platform, Microsoft 365, AWS, GitHub Actions, and AI/LLM capabilities. Administer and optimize the automation environment for reliability, performance, cost, and governance. Monitor, troubleshoot, and continuously improve workflows while providing technical direction and partnering with stakeholders.

Build, ship, and operationally own security integrations and detections (WAF, RASP, API security, IAST, SCA) across Datadog tracing libraries. Design production-grade, polyglot instrumentation (primarily .NET/Java), measure performance and cost, mentor teammates, shape roadmap, and collaborate with product and platform teams.

As a Software Engineer, you'll develop software for Ceph and distributed storage, collaborating with a global team to enhance cloud solutions.

Supports daily R&D departmental activities, contributes to ongoing projects, conducts research and analysis for decision-making, and collaborates with team members to develop and implement innovative ideas while demonstrating teamwork, customer focus, integrity, and sustainability.

Develop and maintain software components while helping design, integrate, and improve AI-powered solutions, conversational assistants, and intelligent applications. Integrate systems through APIs and web services, troubleshoot technical issues, write unit tests, support software quality, document developments, and improve processes. The role offers structured learning in AI, software development, and cloud technologies within a public-sector digital modernization project in Madrid.

Join a multidisciplinary team to design and develop Mission Planning solutions (.NET) for Airbus defence programs. Work across the software lifecycle: requirements, system analysis, development, V&V, documentation, quality and safety processes, and delivery.

Develop and maintain modern C++ software for mission systems on Linux. Implement DDS-based data-centric communications, build Qt GUIs, apply TDD, own end-to-end feature delivery using trunk-based development, write tests and technical documentation, and collaborate with cross-functional teams to deliver high-performance distributed solutions.

Own and implement the engineering and integration layer for AI capabilities, prototype LLM/RAG pipelines, build APIs and pipelines, integrate AI into CI/CD and observability platforms, ensure security/compliance and traceability, and drive automation and developer productivity in cross-functional teams.

Senior full-stack engineer building AI-powered digital products. Work across full-stack environments using TypeScript and React, leverage AI tools and LLMs, design agent-based integrations, collaborate cross-functionally, adapt to shifting priorities in fast-paced teams.

Join the Backend Platform team to manage and scale Rover's datastores (Postgres/MySQL on AWS RDS), lead upgrades, design backups, build self-service automation (Terraform, Python), monitor systems (Datadog/CloudWatch/Splunk), participate in on-call rotation, and collaborate with product and engineering teams on migrations and performance tuning.

Canonical is hiring a Software Engineer to develop features for Kubernetes, focusing on operators and integrations while collaborating in a distributed team.

Develop high‑traffic web applications and self‑serve conversion flows (discovery → quote → signup), build and optimize alan.com and marketing acquisition systems, collaborate with Marketing/Sales/Product/Data/Design, and deliver measurable improvements that drive member acquisition and revenue using the company stack.

Build and maintain a distributed, high-performance financial platform using Java and related technologies. Contribute to architecture, scalability, reliability, security, database performance, and core financial data infrastructure. Mentor engineers, review code, collaborate across teams and time zones, lead projects, and deliver production software rapidly.

Own backend engineering goals for the Recoveries team, building scalable loan recovery systems and strategies. Lead delivery through ambiguity, collaborate with product, design, analytics, and risk stakeholders, and improve system reliability, observability, quality, and operational readiness. Participate in on-call support, establish engineering standards, resolve technical and business issues, and mentor team members while designing batch and asynchronous workloads.

As a Fullstack Software Engineer at Alan, you'll design and build healthcare applications, streamline operations, mentor peers, and shape product decisions in a collaborative environment.

Develop, test, and deliver C++ features for a Windows-based 3D CAD system and supporting cloud services. Implement and prototype functionality, improve algorithms for performance, write unit tests, participate in code reviews, and collaborate with QA, product, and cross-functional teams to clarify requirements and ensure high-quality releases.

Provide technical support for applications: investigate and resolve issues, develop and implement interfaces, create support documentation, collaborate with Design/Test/Dev teams, estimate resources, and monitor project performance.

Investigate and resolve verified application issues, develop and implement interfaces, create technical support documentation, collaborate with design, test and development teams, provide user support, estimate resource timings, and monitor project performance to meet goals.

Design and build scalable backend systems for PlanetScale's database platform (Vitess/Postgres), collaborate on distributed systems challenges, work autonomously and with customers, optimize performance, and mentor engineers while operating systems at production scale.

Join the Backend team to improve and maintain software tools, develop clean code, troubleshoot applications and collaborate with a diverse team.

The Software Engineer will join the Frontend team to improve and maintain software tools, develop user interfaces, and collaborate with team members on coding standards and new features.

Develop and maintain the JetBrains Runtime to ensure IDEs run fast and render well. Provide low-level support for UI frameworks (Swing, Compose for Desktop), work on OpenJDK projects, implement hardware-accelerated rendering (Metal/Vulkan/OpenGL/D3D), fix JBR issues, and optimize/refactor cross-platform system UI code for Windows, macOS, and Unix.

Architect, develop, and scale cloud services, dashboards, and data pipelines to support robotics and autonomous vehicle telemetry. Integrate IoT devices with Azure services, build APIs/microservices, implement observability and CI/CD, validate systems in lab and field, and mentor junior engineers.

The role involves designing and building AI-focused research tools, optimizing performance, engaging with customers, and scaling product features quickly.

The Backend Engineer will design scalable infrastructure for AI research tools, collaborate on optimizing system performance, and own evaluation pipeline automation.