Top Software Engineer Jobs in Spain

The Software Engineer will design, develop, and maintain UI platform features, focusing on scalability, security, and performance, while collaborating with teams for integration and compliance.

Design, deploy, and operate Nexthink's AWS foundation and EKS platform across multi-account, multi-region cell architecture. Automate infrastructure provisioning with IaC and GitOps, support product teams with self-service capabilities, maintain reliability, security, cost-efficiency, and participate in on-call rotation while evolving platform scale and resilience.

Build scalable backend systems and data pipelines to power consumer credit reporting. Partner with Product, Compliance, Servicing, and Credit teams to design, deliver, monitor, and operate accurate reporting systems, including on-call responsibilities. Develop robust, well-tested code in Python or Kotlin using distributed systems patterns and technologies like AWS, MySQL, and Spark.

Build and maintain front-end features and developer-facing tooling for New Relic One using modern JavaScript/TypeScript. Select frameworks, produce performant CLI tools, automate developer tasks, collaborate on UI best practices, and implement CI pipelines and testing.

Design, build, and deliver client-facing solutions using the ZAIDYN platform. Support full project lifecycle from requirements, development (Node.js/React.js), testing, and deployment. Integrate APIs, troubleshoot defects, produce documentation, collaborate with cross-functional teams, and apply Agile practices to meet client expectations.

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, design and run experiments (A/B tests and AI evaluations), implement AI infrastructure for reliable LLM inference, and iterate quickly to scale production-ready LLM-powered products.

Own, evolve, and automate the engineering enablement platform and CI/CD tooling. Improve build, release, and deployment reliability and performance, scale self-service CI/CD, implement GitOps and containerized workflows, manage artifact and supply chain practices, operate Terraform/AWS platform infrastructure, enhance CI/CD security and observability, and drive adoption of platform standards across engineering teams.

Work on-site with government customers to design and build data-driven solutions. Responsibilities include full-stack engineering, data integration at scale, architecture design, coding, and collaborating with technical and non-technical stakeholders. Requires adapting quickly, independently owning projects, and deploying solutions that directly impact critical operations.

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.

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

Own and deliver backend identity systems for international markets, shaping technical direction, designing distributed, highly available services, and collaborating with product, design, and analytics. Improve reliability, performance, and operational health; participate in on-call rotation; set code and design standards; mentor and grow engineers; reduce toil and create runbooks/playbooks. Drive cross-team collaboration to meet regulatory and market-specific identity/KYC requirements.

Lead and deliver Repayment UX features for Affirm's mobile products using React Native. Own quarterly goals, guide engineers through ambiguous problems, collaborate with product/design/analytics, ensure operational reliability (metrics and on-call), improve engineering standards, and mentor teammates to drive high-quality, scalable mobile experiences.

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 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.

As an Ubuntu Core Software Engineer, you will design and implement features for the embedded Linux operating system, maintain boot mechanisms, debug system-level issues, and collaborate with a global team.

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.

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 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.

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'll enhance REDAPL, lead projects, focus on data ingestion and query pipelines, and ensure platform reliability.

Responsible for developing GPU Monitoring features and maintaining eBPF functionality, investigating production issues, and shaping architecture within the Datadog Agent.

The role involves developing GPU Monitoring features and maintaining eBPF functionality, debugging production issues, and contributing to product architecture in Datadog's Agent over various Linux environments.

Design and build backend services, APIs and workflows for an AI neobank app. Integrate with banks, payment gateways, insurers and data providers. Ensure reliability, security, observability, reconciliation and operational readiness for regulated financial products while partnering with product, mobile and operations teams to deliver scalable customer journeys.

Build end-to-end customer-facing and internal features for an AI neobank app: web flows, backend APIs, admin tools, dashboards, and operational systems. Integrate APIs, manage data flows, improve production reliability, and iterate using analytics and feedback. Collaborate with product, design, mobile, and operations teams and reduce manual work through internal tools.