Top Software Engineer Jobs in Spain

As a Distributed Systems Engineer, you'll design and evolve LiveKit's core systems, implement resilient architectures, and enhance reliability and developer velocity, working on critical features in production environments.

Design and evolve core control, data, and observability systems; implement resilient region-spanning architectures; build libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, and testing; and shape platform capabilities across identity, scheduling, observability, and distributed state management.

The role involves designing and evolving core systems at LiveKit, implementing resilient architectures, and building tools to enhance system reliability and developer speed. Strong distributed systems experience and programming skills are essential.

Design, implement, and operate low-latency, highly available distributed control, data, and observability systems. Build region-spanning architectures, libraries, protocols, and tooling; diagnose and harden critical paths using metrics, tracing, testing, and real traffic; and shape platform capabilities around identity, scheduling, observability, and distributed state management.

Design and implement scalable backend services and APIs with tight AI/LLM integration. Collaborate with product and data science teams to operationalize models, deploy microservices (Docker/Kubernetes), maintain CI/CD and reliability, mentor junior engineers, drive technical best practices, ensure security and compliance, and lead feature development and documentation.

Design, implement, and maintain scalable backend services and APIs with LLM/AI integration. Collaborate cross-functionally to operationalize AI models, lead projects, mentor engineers, ensure reliability, security, and CI/CD-driven deployments, and drive technical best practices.

Lead the development and maintenance of applications using .NET and Python, manage CI/CD pipelines, and collaborate in Agile environments while coaching junior members.

The Principal Software Engineer will lead technical development and maintenance of applications, promote standards, mentor team members, and ensure high-quality project delivery.

The role involves developing PHP applications, mentoring junior developers, managing software life cycle, and ensuring operational stability in an Agile team.

As a Senior Software Engineer, you will develop and manage a MongoDB solution on various platforms, ensuring reliability and security while contributing to a small team focused on impactful projects.

The Senior Software Engineer will build integrations with external APIs, optimize code performance, and maintain testing protocols. A focus on backend development is essential.

The Staff Software Engineer will design and manage end-to-end data pipelines, ensuring data quality and governance while collaborating across Java and Python systems, including event schema design and AI tooling.

As a Senior or Staff Software Engineer focused on SRE, you will optimize performance, manage infrastructure with code, drive observability, and collaborate with teams to enhance system reliability and efficiency.

As a Senior Software Engineer, you will design, develop, and implement features for the core products using NodeJS and Java while ensuring clean and efficient code. You will participate in monitoring deployments, collaborate in an agile environment, and contribute to technical decisions.

Build production-grade AI agent infrastructure for Fever’s Product Engineering organization, including agent harnesses, sub-agents, guardrails, evaluations, knowledge bases, cloud development environments, CI/CD delivery systems, observability, and measurement platforms. Optimize AI workflows for quality, speed, and cost while improving planning, coordination, and communication across engineering squads. Own backend systems end to end and establish engineering standards for reliable production software.

Design, develop, test, debug, and optimize scalable software components, cloud-based APIs, microservices, and integrations using engineering best practices. Contribute to architecture discussions, deployments, automation, and technical improvements. Collaborate with product and cross-functional teams, support junior engineers through reviews and knowledge sharing, communicate with stakeholders, and participate in technical interviews and documentation.

Build and improve Restream’s web interfaces and user-facing features for the AI Clips team. Design UI and business logic, collaborate with product designers, participate in code reviews, improve system reliability, and evaluate emerging technologies. The role requires strong JavaScript and TypeScript expertise, advanced React knowledge, CSS preprocessor experience, and familiarity with backend development, cloud infrastructure, containers, and continuous deployment.

Design and develop scalable backend services, integrate AI capabilities, and improve existing systems. Collaborate across teams to enhance the CMC platform.

Design, build, and operate backend services for the orchestration engine and automated decisioning pipeline. Deliver orchestration features, improve resilience (idempotency, backpressure, retries), maintain observability, participate in on-call rotations and incident response, and drive engineering quality via code reviews, CI, documentation, and mentoring.

Join Grafana Labs as a Staff SRE focused on database products (Mimir, Loki, Tempo, Pyroscope) to own production reliability for high‑SLA customers. Partner with product squads, design and implement automation and SLOs, lead incident response and post-incident reviews, improve observability and alerting, and drive scalable, fault-tolerant solutions and reliability engineering best practices.

Leads architectural and code-level performance engineering for Elasticsearch, from design through production. Develops performance models, profiles distributed systems, identifies bottlenecks, optimizes logging, metrics, vector search, and ES|QL, and builds benchmarking and regression-detection automation. Drives AI-assisted optimization harnesses, collaborates across engineering teams, establishes performance-focused practices, and mentors engineers. The role requires deep Java, JVM, concurrency, distributed systems, benchmarking, and large-scale data-store expertise.

Lead the migration of software from C# to Rust, design high-performance systems, and mentor developers while maintaining coding standards and software quality.

Design, build, test and deploy high-performance, multi-region microservices and RESTful APIs using cloud-native tooling. Modernize real-time content systems, troubleshoot production issues, collaborate with stakeholders, and mentor teams while following Agile/Scrum practices.

Define and evolve system architecture, translate business needs into scalable solutions, drive architectural decisions, contribute hands-on to implementations, modernize monoliths, and promote engineering best practices across teams.

Lead design and implementation of DevSecOps frameworks and automated security testing (SAST, SCA, container scanning, IaC). Drive threat modeling, supply chain security, tool integration, stakeholder influence, and mentor engineers while aligning practices with enterprise security and compliance.