Top Software Engineer Jobs in Spain

Design and build scalable backend services using Node.js and MongoDB. Collaborate with teams for technical solutions, and ensure reliable architecture with clean code.

Own and evolve the GDPR Orchestrator platform: design and operate its core engine, safety mechanisms, and observability. Build docs, templates, and self-serve tooling so product areas manage data rules. Coordinate cross-area requirements with legal, security, and data teams. Improve platform developer experience, safety, and scale integrations across data stores and third-party systems.

Design, build, and maintain customer profile applications across Europe. Implement backend services (Java/Spring) and frontend components (React/TypeScript). Collaborate in an Agile team across the full SDLC, perform code reviews, and ensure high code quality, system performance, observability, and reliable CI/CD deployments.

As a Software Engineer at Back Market, you'll develop and manage payment services in an agile environment. You'll focus on backend systems, contribute to clean code, and collaborate with interdisciplinary teams to optimize user experiences and ensure secure payments.

Lead design and development of scalable C#/.NET applications, establish architectural standards and technical roadmap, mentor engineers, ensure quality/security, participate across the full software lifecycle, and act as full-stack developer and technical authority.

Design, develop, and improve PaaS backend systems for the Vonage Video Platform. Implement features for API Gateway, media control, and signalling; optimize distributed architectures for scalability, reliability, and performance; instrument service quality; collaborate cross-team on signalling fabric; and adopt AI-assisted engineering to accelerate delivery.

Develop and design backend systems for the Vonage Video Platform, implement features for API Gateway, Media Control and Signaling, optimize distributed resource provisioning, improve service quality and performance, and collaborate across teams to build scalable, fault-tolerant real-time communication services.

The role involves testing firmware, developing automated tests, ensuring correct software versions, and setting up test environments with a focus on security for ICS.

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.

You will build and maintain container images, automate CI/CD processes, engage with the community, and mentor junior team members in a collaborative environment.

Drive process improvement, coach colleagues, and manage features in a distributed system for cloud automation and software operations.

Lead Python Software Engineer responsible for developing solutions, collaborating on designs, mentoring team members, and enhancing engineering practices.

Develop and enhance dqlite, a distributed SQLite database, including debugging, implementing features, and engaging with the open source community.

The Front-end Software Engineer will collaborate on the DXC Assure Digital Platform, focusing on product life cycle participation, feature delivery, mentoring peers, and engaging with open-source communities.

Build and scale core observability services for high-volume telemetry ingestion, distributed storage, query engines, alerting pipelines, and AI-assisted troubleshooting. Work on reliability, performance, and production incident resolution across a cloud AI platform.

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.

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.

Build and ship end-to-end features and agentic automations for North, Cohere's AI workspace for finance. Integrate financial data sources, enforce data isolation and RBAC, collaborate with Product/UX/ML/Sales, work with finance customers, ensure reliability/security/auditability, and iterate on platform capabilities using AI where appropriate.

Build production-grade machine learning systems that connect data pipelines to user-facing software. Design robust system architecture, implement model inference, ship resilient full-stack/cloud services, and collaborate on UX-driven solutions using Python, APIs, and AWS.

Build and maintain backend components for a scale-out distributed CloudVision platform. Design architecture, implement services in Go/C/C++, write automated tests, and deploy via CD pipelines. Collaborate with product management and customers to define requirements for device management and network analytics.

Build high-throughput, low-latency Kotlin/Java microservices (RCS channel). Design scalable, well-tested systems, collaborate cross-functionally, deploy to cloud (AWS) using Docker/Kubernetes, and use Kafka/Redis and SQL/NoSQL for data handling and observability.

Develop backend services, APIs and modern frontends; implement event‑driven architectures and cloud deployments; integrate AI/LLM-driven agents, maintain CI/CD pipelines, automated testing, and production monitoring to support customer care applications.

Lead Full Stack Engineer owns design-to-production of an AI-first repossession and remarketing platform. Shape architecture, build scalable resilient services, integrate LLMs/GenAI for validation and document processing, drive technical decisions, reduce technical debt, operate production systems, and mentor engineers while working in cross-functional agile teams.