Top Software Engineer Jobs in Spain

The Backend Software Developer will design, develop, and deliver software solutions, collaborate on architecture, and maintain production environments while adhering to best practices and working in Agile teams.

Lead backend development for the IT Provisioning team, set technical standards, ensure solution quality, and coach tech leads. Design and operate scalable, reliable microservices, event-driven systems, CI/CD pipelines, and Kubernetes deployments to enable end-to-end customer onboarding.

The role involves taking ownership of complex projects for strategic partners, collaborating with customers' teams, and using coding skills to innovate and solve technical challenges.

Seeking a Software Engineer to build AI-driven products, ensure solution quality, mentor colleagues, and collaborate on technological solutions for travelers.

The role involves delivering features across the CRM platform for distributors, using AI tools, handling fullstack development tasks, and collaborating closely with teams and customers.

As a Back-End Software Engineer, you will design, build, and deploy cloud-native software using Java and Kotlin on AWS, ensuring agile practices and a strong DevOps mindset.

Design, write, and execute integration, component, UI, and automated tests. Collaborate with developers and product owners to create test plans, automation, and test infrastructure; debug, triage, and report defects; contribute to API documentation and test strategy within an agile SDLC.

The Senior Product Software Engineer will develop scalable software solutions, manage full-stack development, APIs, microservices, and collaborate with cross-functional teams to enhance application performance while ensuring quality and reliability through CI/CD processes.

Build reliable, high-performance frontend features and responsive interfaces for QV.AC, an AI assistant. Maintain code quality through coding standards, reviews, testing, debugging, and performance optimization. Develop application state management and seamless cross-platform experiences while collaborating effectively with a globally distributed remote team. Experience with React or Preact, JavaScript or TypeScript, state-management tools, and P2P or distributed systems is required.

Develop, test, and maintain PL/SQL code (procedures, functions, packages) for the INSIS insurance platform. Integrate systems via APIs/file exchange, optimize performance, write documentation, and collaborate with business and technical stakeholders to deliver maintainable, reusable solutions.

Leads the design, development, maintenance, testing, troubleshooting, and optimization of complex full-stack software applications. Collaborates with cross-functional teams, documents technical requirements, resolves IT issues, prepares data, supports end users, and applies software architecture, microservices, database, CI/CD, containerization, monitoring, and Agile engineering practices.

Lead the design, development, maintenance, testing, optimization, and troubleshooting of complex full-stack software applications. Collaborate with cross-functional teams, document technical requirements, resolve issues, prepare data, support users, and develop reliable APIs and microservices. Apply C#, .NET, Angular, SQL, messaging systems, cloud-native engineering practices, CI/CD, containerization, monitoring, and Agile methodologies while helping establish responsible AI-enabled engineering workflows.

Develop, test, integrate, and support robotic controls software for automated lift trucks in an embedded environment. Responsibilities include vehicle control communication, simulation, requirements development, software and electrical architecture, code and design reviews, supplier leadership, manufacturing support, and mentoring entry-level engineers. The role requires C/C++ development, robotics sensors and SLAM experience, embedded control systems, network communications, and MATLAB/Simulink/Stateflow expertise. Occasional travel may be required.

Build and maintain the mobile foundation using React Native and Expo. Design performant, localised, and delightful iOS/Android experiences, integrate data, enable global deployments, and improve member engagement through features, testing, and app-store releases.

Lead design and delivery of real-time fraud decisioning services and APIs, extend decisioning platform to international markets, integrate regional risk vendors and ML/AI signals, own platform tooling and availability, mentor engineers, collaborate cross-functionally, and participate in on-call rotation.

Lead design and delivery of AI-powered visualization and investigation features using LLMs. Build reliable, explainable systems combining deterministic product capabilities with generative models, drive prompt/context engineering, evaluation frameworks, and cross-team product-focused technical leadership and mentorship.

Build features, prototypes, and demos using modern AI coding tools and agents; iterate prototypes into reliable, scalable production; direct and evaluate AI coding agents; collaborate closely with founders and senior engineers; explore and improve AI development workflows to accelerate product delivery.

Build and architect Base360.ai: design and launch booking, pricing, payments, operations, and AI-powered automation. Integrate platforms (Airbnb, Stripe, Twilio, OpenAI), scale systems internationally, and embed AI workflows to automate operations and optimize revenue.

Design, build, test, and maintain scalable .NET backend and React frontend applications; develop REST APIs and database solutions; support CI/CD and DevOps practices; participate in architecture, code reviews, troubleshooting, and automation to ensure application performance and quality.

Design, build, and maintain the foundational, high-scale search engine systems powering billions of daily requests. Work on backend infrastructure, deployment automation, capacity planning, observability, performance-critical code, and production operations while collaborating with a team to ensure reliability and scalability.

Build and operate AI-driven deployment gates that evaluate CI/CD deployments using observability data and LLM/agent features. Design progressive deployment automation, safety guardrails, offline/online evaluations, and robust production services. Partner with Product and internal AI teams to iterate from prototype to GA, own metrics and rollouts, and be on-call for critical systems.

You will lead engineering efforts for backend system development, collaborate with global teams, ensure operational availability, and develop talent on your team.

Design, build, and maintain high-performance C++ endpoint agents (Collectors) for Windows and macOS. Own features end-to-end, debug OS-level issues, improve performance, reliability, and security, and create tooling to support development and rollout at global scale.

Develop and maintain RESTful and event-driven APIs for a warehouse management platform. Build scalable backend services with Node.js, optimize SQL queries and stored procedures, integrate internal and external systems, collaborate with front-end, mobile, and platform teams, and support debugging, monitoring, documentation, and defect resolution.

The Software Engineer will develop and enhance data collection and ingestion pipelines to support AI model training, focusing on cloud infrastructure and data processing.