26 Backend Engineering Jobs in Barcelona, Spain

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• What you will do Design and build shared libraries, framework layers, and internal services used across every Proton product Turn…
• You have opinions about naming, defaults, error handling, and what belongs in a library versus a service A feel for…

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• What you need to be successful Background and skills: At least 5 years of proven experience as a backend-focused software…
• We’re looking for a seasoned backend engineer eager to apply their expertise in the context of Edge networking.

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• Act as a sparring partner for Product Managers during Product Discovery, ensuring technical decisions support the user experience.
• High-stakes engineering: Operate at the thrilling intersection of high-speed trading and strict financial regulation where markets move fas…

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• Role overview: We are looking for a Senior Backend Engineer (Ruby on Rails Developer) with a deep understanding of server-side…
• Key responsibilities Designing and developing highly scalable backend services and APIs to support front-end applications and third-party i…

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• Responsibilities Design and develop secure, scalable services and REST/GraphQL APIs Implement notification logic, identification flows, and…
• Position Build and maintain the core back-end systems that power the Hub: the notification engine, identification layer, data pipelines, in…

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• In the context of our exponential growth, we are strengthening our internal engineering team and opening a Senior Backend Software…
• Technical Stack: Languages: Java 25, Kotlin 1.9, Go Framework: Spring Boot 3.x.x Database: PostgreSQL Message Broker: RabbitMQ Caching: Red…

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• The Role As a Backend Software Engineer, you will be responsible for designing, building, and maintaining the server-side components of…
• Requirements 5+ years in backend engineering roles; Proficiency in Node.js and TypeScript; Strong experience with Supabase or equivalent Po…

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• The Backend Platform team operates as part of the broader Platform Engineering division.
• We embrace progressive engineering practices including automated testing and a continuous deployment pipeline.

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• What you'll do Build, maintain, and scale backend services and their support tools Participate in architectural definitions with a high…
• And comfort adapting to different languages and frameworks Familiarity with asynchronous programming techniques: streams, event-based flows…

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• What you bring A solid software engineering background, ideally from infrastructure, platform, backend or DevOps roles.
• Cloud and infrastructure experience (AWS, GCP or Azure; Docker/Kubernetes; CI/CD; infrastructure as code).

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• Requirements Qualifications / Experience / Technical Skills Deep, hands-on Rust experience at a systems/backend level.
• Ability to facilitate architectural decision-making and create technical roadmaps.

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• Key responsibilities: Designing and developing highly scalable backend services and APIs to support front-end applications and third-party…
• Role overview: We are looking for a Senior Golang Engineer with a deep understanding of server-side technologies and a passion…

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• What you'll do Design, develop, and maintain scalable, high-performance software systems.
• Collaborate with the Product Owner, Tech Lead, and other stakeholders to gather requirements and design effective solutions Communicate reg…

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• Design and build effective, observable, and scalable backend services in Go.
• Design and evolve client-side architecture for web and mobile while ensuring consistency across platforms.

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• As a Software Engineer, you'll build products, platforms, and services used across multiple King games, working closely with engineers, Pro…
• Designing and building scalable backend services and APIs.

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• About you Deep experience building production-grade systems software, with technical ownership at Staff level.
• Applied ML / data engineering (Groundswell); open-source systems contributions.

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• Strong software engineering experience in backend or systems development Experience working with Kubernetes and containerized environments…
• Role Summary As a Senior Kubernetes Engineer (Flexibility Linux Platform) you will design and build a turnkey on-prem platform used…

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• As a Software Engineer, you’ll be at the center of designing and scaling our platform, the low-latency speech/LLM pipelines, orchestration…
• What we're looking for 3-5 years of experience building products end-to-end, from architecting solutions to deploying production-grade soft…

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• Experience Building and delivering production-grade software, with experience in deploying AI-powered product capabilities 5+ years of prof…
• Design, develop, and maintain Java backend services and APIs in microservices architecture.

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• You will play a key role in shaping our technology strategy, evaluating new tools and frameworks, and ensuring best practices…
• Proficiency in backend technologies (e.g., Node.js, Python, Java, .NET) and experience with modern frontend frameworks (e.g., React, Angula…

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• Experience building and maintaining high-load backend systems.
• WHO WE'RE LOOKING FOR 🌟 We’re hiring a Senior Python Engineer to build and evolve a Python-based platform layer that…