Top Software Engineer Jobs in Spain

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 and maintain embedded Linux applications for electrical power devices, including kernel modifications, backend (Python/Flask) and frontend (HTML/CSS/JS/Vue) work, web services for remote control, security implementation, deployment on Linux, code review and versioning (GitLab/Redmine), sprint participation, documentation, testing at customer sites, and mentoring junior engineers.

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.

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.

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

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.

Seeking a Full-Stack Software Engineer to build the core of an Agentic AI Platform. Responsibilities include frontend and backend development, product design collaboration, and infrastructure management with a focus on clean, maintainable code.

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.

Lead backend engineering for Card Acquisition: define technical strategy, deliver quarterly goals, mentor engineers, collaborate with product/design/analytics, build scalable highly available systems, ensure operational excellence (monitoring, on-call, playbooks), and promote quality through standards and tooling.

Responsible for building scalable distributed systems, mentoring teammates, innovating on technical solutions, and improving team processes. Requires expertise in backend languages, especially Golang and Typescript.

Build and ship native Android features for an AI Neobank using Kotlin. Design clean user journeys for financial services, integrate backend APIs, improve performance and reliability, use analytics to iterate, and implement on-device AI where it improves UX.

Design, build, and maintain scalable, low-latency backend services using Node.js and AWS (EC2, Lambda). Implement event-driven architectures with SQS/SNS, use DynamoDB for high-performance data, develop RESTful APIs, monitor and optimize performance, and participate in code reviews and cross-functional collaboration.

Design and develop backend services and APIs, enhance performance, collaborate with teams to align with product strategies, and manage B2B solutions.

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.

As a Senior Scala Developer, you will design and optimize aggregate systems for data analytics, enhancing query performance and system reliability in cloud environments.

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.