Top Software Engineer Jobs in Spain

Lead the design, implementation, operation, and technical direction of complex, scalable game platform systems. Improve reliability, performance, security, and delivery standards; collaborate across product and engineering disciplines; and mentor engineers. The role requires strong software engineering fundamentals, deep object-oriented programming experience, and experience shipping and operating production systems. Cloud, distributed systems, large-scale data, and modern web framework experience are beneficial.

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.

Staff Backend Software Engineer responsible for setting technical strategy, designing and launching highly available distributed systems, and delivering business-critical identity capabilities for international markets. The role involves cross-functional collaboration, system architecture, operational ownership, monitoring, on-call support, code quality standards, technical communication, and mentoring engineers.

Develop and architect features for Malwarebytes Browser Guard, serving millions of users. Write high-quality, tested code; design integrations; collaborate with Product, UX, and QA; review code; mentor engineers; and support delivery of the product roadmap. The role emphasizes React, JavaScript/TypeScript, Go, debugging, system architecture, AI workflows, user-centric design, and strong communication.

Lead technical strategy and architecture for global cloud-native eCommerce platforms. Make critical technical decisions, champion microservices, APIs, CI/CD, DevOps, cybersecurity, observability, and testing practices. Mentor senior engineers, align engineering with product and business goals, and represent engineering with external partners and vendors. The role supports scalable digital experiences connecting patients and healthcare professionals to medicines and vaccines worldwide.

Design, build, and improve distributed clearing and securities-finance systems supporting brokerage products. Own projects from ideation through deployment, develop reliable APIs and integrations, refine existing infrastructure, and participate in on-call operations. The role requires strong systems fundamentals, attention to detail, financial-markets interest, and ownership of production systems handling customers’ money.

Develop, update and test high‑fidelity aircraft simulation models for the Eurofighter flight simulator. Implement C++ and Ada software, create test tools (Python, Bash), run unit/system/integration/acceptance tests (Jenkins), manage SW configuration, coordinate with international partners, and produce lifecycle documentation. Occasional EU travel required.

As a Software Engineer, you'll design and develop software solutions, solve technical problems, lead projects, and collaborate with product and operations teams.

Build and own core tax product features from discovery through production, specializing in frontend or backend engineering. Collaborate cross-functionally, design reliable services and APIs, improve scalability and developer experience, and use AI-assisted tools for development, testing, debugging, and documentation. Contribute to technical strategy, DevOps practices, maintainable code, and responsible AI adoption while delivering customer-focused outcomes in an ambiguous, fast-moving environment.

Build and deploy software for Stripe’s financial infrastructure, specializing in frontend or related technical areas. Collaborate on multi-person coding projects, learn unfamiliar systems, contribute to large codebases, participate in code reviews, and safely update production systems. New graduates are expected to apply strong programming fundamentals, communicate clearly, use AI tools responsibly, and solve complex technical problems with increasing independence.

Leads software test automation solutions, infrastructure integration, CI/CD pipelines, and stakeholder requirements for new and legacy projects. Responsibilities include configuring Linux, virtual build and test environments, databases, code coverage tools, containers, and continuous integration systems; troubleshooting infrastructure; supporting test frameworks and training; and promoting automation best practices. The role also involves project planning, cross-team coordination, and occasional development of automation infrastructure.

Build and scale Base360.ai’s short-term rental platform, including customer-facing applications, APIs, automation engines, AI-powered workflows, third-party integrations, and cloud infrastructure. Develop systems for reservations, pricing, payments, guest communication, property operations, reporting, and financial workflows. Own projects end to end, make architectural decisions, ensure reliability, and deliver scalable products in a remote-first startup environment.

Develop and verify high-integrity embedded real-time software for airborne systems throughout the full lifecycle, from requirements and design through coding, testing, certification, and target implementation. The role involves C/C++ and Ada development, real-time operating systems, software verification, architecture decisions, project leadership, collaboration with systems and validation teams, and delivery of compliant software products for Airbus military aircraft programs.

Lead the design, development, and maintenance of Java backend services and REST APIs within a microservices architecture. Drive architectural decisions, engineering best practices, cloud deployment on AWS, CI/CD, system optimization, reliability, and technical risk mitigation. Collaborate with product, architecture, QA, DevOps, and frontend teams while mentoring engineers and contributing to an Agile greenfield product.

Staff Software Engineer responsible for architecting and developing scalable web applications and APIs using Elixir, React, and PostgreSQL. The role involves solving ambiguous technical and business problems, ensuring system reliability and performance, collaborating cross-functionally, presenting solutions to leadership, writing tested code, participating in code reviews, mentoring engineers, and removing technical roadblocks.

Designs and improves automated testing strategies across unit, integration, system, and end-to-end levels. Develops Java-based tests, investigates defects, creates test plans, and performs exploratory, performance, chaos, and load testing. Integrates testing and static analysis into CI/CD pipelines, maintains containerized test environments, monitors quality metrics, and partners with development, DevOps, QA, and business teams to improve software quality and coverage.

Design and implement backend card-platform features covering tokenization, sensitive card data, transaction enrichment, settlement, issuer integrations, and payment processing. Architect scalable, secure, PCI-compliant microservices; own projects end-to-end; contribute to shared infrastructure; review code; mentor teammates; and participate in on-call support. The role requires Java, Spring Boot, API and microservices expertise, card-payments knowledge, Docker, Kubernetes, and strong independent collaboration skills.

Leads the architecture, integration, standardization, verification, and certification of safety-critical embedded software platforms for airborne computing systems. Responsibilities include requirements engineering, RTOS and middleware integration, API development, multicore platform bring-up, avionics protocol support, trade-off analysis, prototyping, and compliance with RTCA DO-178C and DO-330.

Supports the integration, standardization, testing, and certification of safety-critical embedded software platforms for airborne computing systems. Responsibilities include requirements and verification support, platform architecture integration, APIs, RTOS and middleware integration, feature development, DO-178C certification evidence, technical prototyping, benchmarking, and board bring-up. The role requires foundational embedded C, computer architecture, avionics protocols, peripherals, RTOS, ARINC-653, and Python knowledge.

Leads the architecture, integration, standardization, verification, and certification of safety-critical embedded software platforms for airborne computing systems. Responsibilities include requirements engineering, RTOS and ARINC-653 integration, hardware/software bring-up, API development, multicore platform assessment, certification compliance with DO-178C, and technical benchmarking. The role requires advanced C and Python skills, strong computer architecture knowledge, avionics protocol expertise, and experience with safety-critical software tools and platforms.

Lead the technical vision and development of Elasticsearch’s core search infrastructure, including indexing, query execution, retrieval, and relevance. Research search algorithms and data structures, contribute to Lucene, guide technical roadmaps, mentor expert engineers, and collaborate across distributed teams. Build and optimize high-performance distributed search systems while serving as a domain authority for Elasticsearch capabilities.

Design, build, test, document, deploy, and maintain mobile SDKs that run network tests across Android (and optionally iOS/embedded). Collaborate on architecture, ensure reliability/portability, integrate analytics, and support third-party developers and device manufacturers.

Design, develop, test, deploy, and support scalable enterprise integrations and APIs. Build REST, SOAP, EDI, XML, JSON, database, event-driven, and asynchronous integrations using MuleSoft and DataWeave. Collaborate with architects, stakeholders, infrastructure, security, and operations teams. Support CI/CD, troubleshoot distributed production systems, optimize performance, conduct code reviews, and maintain technical documentation and operational runbooks.

Build and maintain production-grade iOS applications using Swift and SwiftUI, integrating AI features through backend APIs. Design reliable AI interaction patterns, optimize performance, memory, battery, and latency, capture user feedback for AI evaluation, and collaborate with backend and ML engineers. Maintain App Store quality, monitor production issues, and resolve root causes.

Leads the design, development, testing, optimization, troubleshooting, and maintenance of complex full-stack software applications. Collaborates with cross-functional teams, documents technical requirements, resolves IT issues, supports end users, and applies modern engineering practices including microservices, APIs, cloud messaging, CI/CD, containers, Kubernetes, monitoring, and Agile methodologies.