Top Software Engineer Jobs in Spain

Join the Kubernetes product team to design and implement Kubernetes operators and addons, write high-quality Golang and Python code, debug issues, collaborate with a distributed team, mentor colleagues, and contribute to open-source integration and lifecycle management. Travel 2–4 weeks yearly for team events.

Build and maintain a distributed, fault-tolerant, high-performance block and filesystem storage system. Work on virtualization (virtio-blk, virtio-fs, QEMU, vhost-user), high-throughput VM-to-storage networking (TCP, RoCEv2/RDMA), and core storage features like replication, consensus, self-healing, and data migration. Debug and optimize performance-critical I/O paths while writing reliable, maintainable code in a collaborative team environment.

Work on YDB distributed storage and database systems to maximize performance on modern and legacy hardware (NVMe, HDD, DPUs). Reengineer components for low-latency, high-throughput workloads, profile and debug production systems, and design resilient distributed storage primitives. Collaborate on incident resolution and production deployments to support Nebius cloud services.

Design, build, and deploy large-scale distributed systems and high-throughput data pipelines. Lead architecture and technical initiatives, ensure performance, resilience, and SLAs, contribute production-quality code, and mentor engineers while collaborating with product and R&D leadership.

Design, build, and operate large-scale distributed systems and high-throughput data pipelines using Go and cloud-native technologies. Lead architecture, performance optimization, reliability SLAs, and code quality. Drive technical roadmap, mentor engineers, reduce technical debt, and collaborate with product and engineering teams.

Design, build, and deploy large-scale distributed systems and high-throughput data pipelines using Go and cloud-native technologies. Lead architecture decisions, ensure performance and resilience, contribute high-quality code, reduce technical debt, and mentor engineers while collaborating with product and engineering teams.

Design, build, and own large-scale distributed systems and high-throughput data pipelines. Lead architecture, improve performance and resilience, reduce technical debt, contribute code, and mentor engineers while collaborating with product and R&D.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Design, build, and lead development of AppGlass features; develop AI-first tooling and automation; implement enterprise integrations and deployments across Kubernetes and cloud; and improve reliability, testing, performance, and security for production use.

Design and implement next-generation AI-powered features for JetBrains IDEs: integrate and enhance AI agents, build novel IDE capabilities, evaluate performance and reliability, and own end-to-end feature delivery.

Develop and maintain foundational Kotlin core libraries used by many developers; contribute to language features, tools, and specifications; participate on a design committee; become domain expert in CS topics; write design documents; focus on API design and performance engineering.

Design and implement AI-powered UI features for JetBrains IDEs using Compose Multiplatform and Swing. Collaborate with designers, improve UI architecture and component reuse, ensure responsiveness and performance in complex desktop applications, and contribute to UI testing and developer tooling features.

Design, build, test, and operate high-throughput, secure cloud services and microservices on AWS. Collaborate with product and architecture teams, implement automated tests, monitor and optimize backend performance, document solutions, and participate in on-call rotations.

Designs and implements enterprise-scale cloud services for AEC data infrastructure. Collaborates with product and architecture teams to deliver scalable, secure Java/Spring microservices on AWS, drives architecture and performance optimizations, ensures automated testing and monitoring, mentors engineers, and participates in on-call support.

Build front-end and back-end infrastructure for the MetaMask Debit Card: design UI/UX across clients, develop scalable APIs and services, integrate with issuers and payment networks, ensure security and high-throughput transaction performance.

Build and enhance MetaMask consumer features (Stablecoin/Earn), implement user-facing solutions across Extension, Mobile, and Web, contribute to backend APIs and middleware, ensure secure and intuitive Web3 interactions, collaborate with product and design, participate in code reviews, and maintain high code quality.

Design, implement, and maintain desktop applications, cloud services, and automation testing. Lead architecture and feature implementation, perform code reviews, write unit/integration tests, support CI/CD and DevOps, and collaborate within Agile/Lean Scrum teams to improve product quality.

Own QA operations and release quality for civil engineering software. Collaborate with scrum teams to run manual and automated tests, design and maintain test cases, report and track defects, reproduce customer issues, automate dashboards/APIs, and improve testing processes to reduce product quality risk.

Design, build, operate, and support resilient distributed platform services. Write maintainable code, troubleshoot production issues, improve reliability and observability, and assist internal teams. Participate in on-call rotations and collaborate on platform evolution.

Lead design and implementation of 2D/3D web graphics features and frontend components for an embedded web viewer. Develop a cross-platform graphics engine, evaluate new technologies, leverage AI-assisted development tools, and collaborate with architects, product managers, and distributed engineering teams to deliver performant visualization and collaboration features.

Build and maintain full-stack product features for Assessments, Interviews, and Learn. Drive identity and authentication systems, write clean maintainable code, perform code reviews, collaborate cross-functionally, and lead technical design discussions to deliver business-impacting features.

Own and evolve a custom Chromium fork to evade anti-bot detection, reverse-engineer JavaScript challenges, build automated tooling and pipelines for evasion, develop observability for fingerprint mismatches, and mentor engineering on browser internals and stealth techniques.

Design, build, and deliver large-scale, always-on distributed backend systems and data-focused products. Participate in design reviews, develop on cloud platforms, mentor teams, and solve algorithmic, optimization, and scalability challenges.

Lead analysis and resolution of system performance issues across Akamai's distributed Linux platform. Design and implement scalable software and tools for performance detection, mentor engineers, and collaborate across teams to deploy efficient solutions.

Drive backend engineering for APIs, integrations, and access management. Own product areas, mentor engineers, ensure reliability, performance, and scalability, and collaborate cross-functionally to deliver customer-facing solutions.