Top Software Engineer Jobs in Spain

Build, launch, monitor, and support scalable backend services in an agile build-and-run environment. Design and improve distributed systems, microservices, APIs, data architectures, and service performance. Contribute to frontend features when needed, support technical decision-making, mitigate production issues, and promote clean code, collaboration, and knowledge sharing. The role requires strong ownership, system design expertise, and a full-stack product mindset.

Develop and enhance MetaMask social and multi-chain experiences across Portfolio, browser extension, and mobile platforms. Collaborate across teams on complex projects, mentor engineers, and build scalable full-stack applications using React, React Native, modern JavaScript, blockchain technologies, APIs, testing, and continuous integration. Ensure cross-platform compatibility and apply web security best practices.

Build and own scalable AI-powered features for Dow Jones GenAI products, spanning backend APIs, data layers, user-facing integrations, and production operations. Integrate LLM and AI APIs, develop prompt management and evaluation tooling, improve observability and CI/CD, and apply MLOps practices for model versioning, monitoring, and experiment tracking. Partner with product managers, data scientists, and engineering leads while mentoring colleagues and driving technical direction.

Lead software engineering for Dow Jones Energy applications, including complex coding, deployment, bug resolution, legacy maintenance, cloud solutions, and CI/CD automation. Mentor engineers, conduct code reviews, develop technical strategies, and improve reliability across AWS and Azure environments. The role also introduces responsible AI-augmented development practices and provides operational support, including off-hours and weekend coverage.

Develop and maintain production-grade computer vision software for AI-enabled parcel management and automated logistics systems. Responsibilities include processing camera data for real-time decisions, integrating AI models and frameworks, designing scalable architectures, optimizing and deploying solutions, and contributing to technology roadmaps. The role also involves collaboration with product and engineering teams, technical leadership, mentoring junior engineers, and establishing software engineering best practices.

Designs and develops backend services for Elastic’s Streams data pipeline, Logstash, and OpenTelemetry Collector using Java, JRuby, and Golang. Responsibilities include solving distributed systems problems, improving code and dependencies, maintaining test coverage, reviewing pull requests, collaborating across teams, supporting enterprise customers, and participating in on-call rotations.

Build and evolve Rerun’s open-source viewer, cross-language SDKs, and integrations with Rerun Hub. Develop high-performance interfaces for large-scale multimodal data, optimize workflows across desktop and web, make full-stack architecture decisions, and collaborate with backend, Hub, design, customers, and the open-source community. The role involves UI development, rendering, data handling, infrastructure, real-time applications, visualization, and performance optimization.

Develop and optimize software solutions for industrial additive manufacturing in an agile team. Responsibilities include designing algorithms, data structures, and software subsystems; debugging complex issues; benchmarking and improving performance, stability, efficiency, and scalability; and contributing to software quality and documentation. The role uses Vue.js, TypeScript, Python, C++, MongoDB, Docker, and automated development tools.

Build and maintain high-volume payment services, write testable code, improve reliability and performance, investigate production issues, collaborate across product and engineering teams, and explore AI-enabled engineering tools to boost productivity.

Develop and maintain scalable frontend web applications and data visualization platforms using React, Redux Toolkit, and Vite. Collaborate with cross-functional teams, implement features, write tests, conduct code reviews, troubleshoot issues, and support RESTful APIs. Contribute to agile processes, accessibility, user experience improvements, and continuous development while using AI tooling responsibly and staying current with modern web technologies.

Design, build, and scale a Kubernetes-based internal platform for managed cloud products. Develop highly available and fault-tolerant production services using Kubernetes and cloud-native technologies, contribute to enterprise platform roadmaps, integrate infrastructure technologies, establish engineering best practices, mentor teammates, and collaborate across Agile engineering teams.

Design, build, and operate a large-scale Kubernetes platform: ensure high availability and performance, automate platform delivery, develop custom Kubernetes Operators in Go, manage production incidents, and run Day 1/Day 2 cluster operations with Helm and GitOps tooling.

Lead full-stack engineering for CommSec’s contact centre modernisation program. Design and operate scalable cloud-native platforms, APIs, microservices, event-driven systems, and AI-enabled customer engagement experiences using .NET, React, TypeScript, AWS, and Dynamics 365. Provide hands-on technical leadership, influence architecture, mentor engineers, and champion DevSecOps, automation, observability, reliability, security, and continuous improvement.

The Software Engineer will join a product squad to develop and maintain functionalities on the 360Learning platform, focusing on JavaScript technologies and clean architecture.

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.

Design and develop Java services within distributed applications for document and image processing. Collaborate with the team and product owner, apply maintainability, testability, performance, security, and quality standards, participate in code reviews, and improve the platform. The role requires Java and Spring Boot expertise, SQL and NoSQL database knowledge, RabbitMQ experience, microservices familiarity, and fluency in English and Spanish.

Develop and maintain Smadex’s real-time bidding platform by designing and implementing features with NodeJS and Java. Write tested, efficient code; participate in code reviews and architectural decisions; monitor deployments; and support production reliability and performance. Collaborate within an agile engineering team while contributing to planning, progress reporting, and continuous platform improvement.

Develop and maintain secure, scalable Salesforce enterprise software across the full delivery lifecycle. Design architectures, write clean code, implement asynchronous processing, conduct testing, document solutions, and participate in Agile planning, reviews, releases, and continuous improvement. Collaborate cross-functionally, contribute to engineering standards and communities of practice, and support the development of other engineers.

Design and develop scalable backend systems for a B2B application using Java and Spring. Participate in architectural decisions involving performance, security, and scalability; apply agile practices; mentor developers; optimize relational database performance; and support cloud and DevOps initiatives, particularly on AWS.

Build full-stack infrastructure, developer tools, frameworks, and user-facing interfaces that improve engineering productivity and operational excellence. Work across Python/Flask, React, React Native, and PostgreSQL in a monorepo, contributing to design systems, accessibility, security, cloud infrastructure, CI/CD, observability, and AI-assisted development. Partner closely with product teams, own solutions end to end, and help create a scalable, secure engineering environment.

Design, implement, and optimize scalable application networking features (Ingress, DNS, private connectivity) for Elastic Cloud. Integrate security controls, conduct load and performance testing, troubleshoot network incidents, build tracing tools, and collaborate with cross-functional teams to meet application networking needs and improve observability and operability.

Develop and maintain software components throughout the software development lifecycle. Translate requirements into technical specifications, contribute to system and application design, write clean code, troubleshoot and upgrade existing software, recommend improvements, and produce technical documentation. The role collaborates with developers and product managers in a hybrid Madrid office environment.

Staff Software Engineer responsible for designing, developing, and owning secure, scalable full-stack home-lending experiences. The role spans .NET, ASP.NET Core, React, Next.js, cloud infrastructure, DevSecOps, CI/CD, observability, testing, and production support. Responsibilities include architecture leadership, API and platform development, performance optimization, responsible use of AI engineering tools, risk mitigation, technical strategy, mentoring engineers, and collaboration with stakeholders to deliver reliable digital products.

Develop and maintain a software test automation framework for medical software. Responsibilities include building automated UI, API, integration, endpoint, and end-to-end tests; improving test architecture; troubleshooting failures; managing complex environments and test data; and exploring AI-assisted testing workflows. The role requires close collaboration with developers and engineers, strong ownership, debugging ability, and continuous improvement of testing practices.

Own complex software systems end to end, architect cloud-native platforms on AWS or Azure, and build agentic LLM-powered insight workflows. Mentor engineers, drive testing and observability standards, and collaborate with Product, Data, and Operations on technical strategy. The role focuses on scaling MediaRadar’s advertising intelligence platform globally, including European expansion and sports-media data capabilities.