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Senior Software Engineer - Application Engineer Spain Jobs

26 Job Offers

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Senior Software Engineer
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Join our Barcelona team as a Senior Software Engineer on the core C&E platform. Design and own scalable backend systems, data pipelines, and APIs that power customer segmentation and personalization. We seek an engineer experienced in SaaS architecture and high-throughput systems. Enjoy a hybrid ...
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Spain , Barcelona
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Bsport
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Senior Software Engineer - AI Platform
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Join our team as a Senior AI Software Engineer in Spain. Implement and integrate cutting-edge LLMs and GenAI APIs to enhance real-world applications. We seek strong Python skills and hands-on RAG, prompt engineering, and CI/CD experience. Enjoy remote work, relocation support, health insurance, a...
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Spain
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Fever
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Senior Software Engineer
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Join our Engineering team as a Senior Software Engineer in Spain. Design, build, and own scalable services using RESTful APIs and relational databases. We value clean code, CI/CD, and offer remote work, relocation support, and great benefits.
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Spain
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50000.00 - 65000.00 EUR / Year
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Fever
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Senior Full Stack Software Engineer
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Join bsport, a leading fitness-tech platform, as a Senior Full Stack Engineer. Design scalable microservices and modern React interfaces in a dynamic, hybrid environment. Enjoy competitive compensation, equity, health insurance, and fitness perks in Barcelona or Paris.
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Spain; France , Barcelona Tasso; Paris
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Bsport
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Senior Software Engineer - Frontend
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Join Microsoft's Azure Data team as a Senior Frontend Software Engineer in Spain. Design and develop world-class user experiences for cutting-edge big data and AI analytics products like Microsoft Fabric. Utilize your expertise in JavaScript, TypeScript, and modern frameworks (React/Angular/Vue) ...
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Spain , Multiple Locations
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft's Ad SDK team in Barcelona as a Senior Software Engineer. Design and optimize high-performance JavaScript/TypeScript SDKs for browser environments. Tackle complex technical challenges in ad-serving technology within a global team. Requires expertise in browser internals and coding ...
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Spain , Barcelona
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Microsoft Corporation
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Senior Software Engineer with Python
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Join a leading global legal tech platform in Madrid as a Senior Software Engineer. Utilize your 6+ years of experience with Python, TypeScript, and modern frameworks to build scalable, high-performance web applications. Enjoy a flexible, remote-friendly culture focused on innovation and well-bein...
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Spain , Madrid
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Babel Profiles
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Senior Software Engineer (Java)
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Join our Madrid team as a Senior Java Engineer. Design and scale a high-performance distributed platform, impacting businesses from day one. Mentor peers, drive architectural decisions, and optimize robust financial data systems. We value clear communication, ownership, and fast-paced iteration w...
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Spain , Madrid
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Adyen
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Senior Software Engineer - Geolocalized Services
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Join our team as a Senior Software Engineer specializing in Geolocalized Services. You will design and build scalable, multi-region backend systems with a strong focus on data residency and privacy compliance. We seek expertise in geo-distributed architecture, CockroachDB/AWS DynamoDB, and backen...
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Spain
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50000.00 - 70000.00 EUR / Year
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Fever
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Senior Software Engineer - Data Science
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Spain , Multiple Locations
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Microsoft Corporation
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Senior Software Engineer
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Join Microsoft's Search Growth team in Barcelona as a Senior Software Engineer. Design and build scalable, consumer-facing search experiences for Bing using C++, Java, or Python. Drive data-driven decisions through A/B testing in a fast-paced, full-stack environment.
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Spain , Barcelona
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Microsoft Corporation
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Senior Backend Software Engineer - Payments & Fraud
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Spain
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Hopper
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Senior Fullstack Software Engineer - Payments & Fraud
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Spain
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Hopper
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Senior Software Engineer, Full Stack
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Spain
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Hopper
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Senior Software Engineer (GOlang)
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Join our Engine team as a Senior Software Engineer specializing in GOlang. You will build and scale the core runtime for Workato's recipe execution, focusing on performance, durability, and distributed systems. This role requires 7+ years of backend experience with scalable applications, database...
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Spain , Barcelona; Madrid
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Workato
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Senior Software Engineer
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Join our team in Barcelona as a Senior Software Engineer. You will build complex Ruby on Rails applications and robust backend APIs, collaborating across teams. We seek 5+ years of Rails expertise, deep Ruby knowledge, and experience with Postgres and caching. Contribute to all development phases...
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Spain , Barcelona
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Workato
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Senior Software Engineer
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Join our team as a Senior Software Engineer in Barcelona or Madrid. You will build complex Ruby on Rails applications and robust backend APIs, collaborating across teams. We seek 5+ years of Rails experience, deep Ruby knowledge, and expertise in Postgres and caching. Contribute to all developmen...
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Spain , Barcelona; Madrid
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Workato
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Senior Software Engineer - Geolocalized Services
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Join our team as a Senior Software Engineer specializing in Geolocalized Services. You will design and build scalable, multi-region backend systems with a strong focus on data residency and privacy compliance. The role requires expertise in geo-distributed systems, CockroachDB or DynamoDB, and ba...
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Spain
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50000.00 - 70000.00 EUR / Year
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Fever
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Senior Software Engineer
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Join Microsoft AI in Barcelona as a Senior Software Engineer. Develop a cutting-edge platform to ground Large Language Models (LLMs) with real-time web data, reducing hallucinations. You'll need expertise in backend technologies like C#/Python and cloud platforms (Azure/AWS). Build scalable, secu...
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Spain , Barcelona
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Not provided
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Microsoft Corporation
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Senior Software Engineer
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Join Fever's Engineering team as a Senior Software Engineer. Develop high-traffic Python applications, work with RESTful APIs, and mentor peers. Enjoy a home office anywhere in Spain, health insurance, and great discounts. Strong English and a focus on code quality are key.
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Spain
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50000.00 - 65000.00 EUR / Year
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Fever
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About the Senior Software Engineer - Application Engineer role

Senior Software Engineer - Application Engineer Jobs represent a pivotal and high-impact career path within the technology industry. Professionals in these roles are the architects and builders of the software applications that power modern business and consumer experiences. Unlike roles focused purely on infrastructure or systems programming, Application Engineers specialize in designing, developing, and maintaining the end-user-facing software products, whether they are web applications, mobile apps, or desktop solutions. These jobs demand a blend of deep technical expertise, strategic problem-solving, and a user-centric mindset to translate complex requirements into reliable, scalable, and performant software.

Typically, a Senior Software Engineer in application development shoulders significant responsibility across the entire software development lifecycle. Common duties include architecting robust technical solutions, writing clean and efficient code, conducting thorough code reviews, and collaborating closely with product managers, designers, and other engineers to define and refine features. They are expected to own major components or services, ensuring their long-term health through comprehensive testing, debugging, and iterative improvement. A key aspect of senior-level jobs is technical leadership: mentoring junior engineers, establishing best practices, driving architectural decisions, and fostering a culture of quality and innovation within their teams.

The skill set for these positions is both broad and deep. Proficiency in modern programming languages and frameworks is fundamental—common examples include JavaScript/TypeScript with React or Angular, Python, Java, Kotlin, Swift, or C++, depending on the application domain. Expertise in associated ecosystems, such as state management, build tools, and testing frameworks (e.g., Jest, Cypress), is standard. Senior roles require a strong grasp of software design principles, API design (REST, GraphQL), performance optimization, and security considerations. Experience with version control (Git), CI/CD pipelines, and cloud platforms (AWS, Azure, GCP) is also highly typical. Beyond technical acumen, successful candidates demonstrate excellent problem-solving abilities, proactive communication, and the capacity to navigate ambiguous requirements to deliver tangible value.

Ultimately, Senior Software Engineer - Application Engineer jobs are for seasoned professionals who thrive on turning ideas into reality. They are the driving force behind the digital products we use daily, balancing immediate feature delivery with the strategic foresight to build sustainable, adaptable systems. For those passionate about crafting exceptional user experiences and leading technical excellence, this profession offers a challenging and rewarding career at the heart of technological innovation.

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