Empleos de remote senior backend java engineer en Madrid

Anyone AI Inc. is seeking a remote, part-time, project-based expert evaluator to design and assess realistic software engineering tasks, spanning bug fixing, feature development, refactoring, and test generation. Contributors will work remotely, control their own schedule, provide their own tools, and may serve multiple vendors, with per-project compensation...

Lever, Inc. is seeking a Backend Engineer based in Spain to join a small, ambitious product team. You will own the central API and backend services, primarily using Node.js and TypeScript, and focus on API design, data modeling, performance, and developer experience. This remote, asynchronous role offers substantial technical ownership, collaboration with...

Hyqoo is seeking a Software Engineer / Python Developer for a contract, remote role. You will design, develop, test, and deploy scalable Python applications and backend solutions, with emphasis on clean code and maintainability. You will work across product and engineering teams to transform business requirements into robust technical solutions, contribute...

Grafana Labs is seeking a Staff-level Backend Engineer to design and ship core backend services powering a context layer for AI-driven data intelligence. You’ll build the foundation for a scalable, multi-tenant SaaS, with ingestion, storage, APIs, and agent-facing integrations in a production-grade environment. This remote-first role offers Spain as a base...

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for...

Lever, Inc. seeks a Backend Engineer focusing on MTA infrastructure, based in Spain but fully remote. You will build and operate high-volume email delivery systems, including SMTP delivery, routing, retries, and reputation controls, with ownership across reliability and observability. You'll work with Trust & Safety and Core Sending teams, using TypeScript...

Constructor.io is a distributed team hiring a backend-focused engineer for its Experiments platform. You’ll build Python services and data-heavy pipelines, with opportunities to contribute to the Dash UI and Spark/Databricks work, while prioritizing correctness and observability. You’ll own backend components for experiment assignment, logging, and...

Tappx, a fast-growing AdTech firm, seeks a PHP Backend Developer to design, implement, and maintain SSP projects with high scalability. You will lead full product life cycle from conception to production and monitoring, driving technical excellence and reducing debt. You will implement internal tools in PHP, ensure code quality with automated tests and...

BLP is hiring ambitious engineers to design and build Delta, the core software that powers our platform. You will work on cloud infrastructure, backend systems, and applying the latest AI techniques to automate complex business processes. Our team values precision, formal reasoning, and rigorous testing to ensure correctness as we scale. We welcome...

We are bsport. The place to be! bsport is an all-in-one platform combining boutique fitness and advanced technology. Our platform helps our partners manage their bookings, payroll, marketing and more, to streamline operations and boost their commercial success. We are bsport. The place to be! bsport is an all-in-one platform combining boutique fitness and...

Grupo NS busca un/a QA Engineer con experiencia en automatización y conocimientos sólidos en FOREX para unirse a un proyecto tecnológico en un entorno Agile y squads. Modalidad remota, desde España. Participarás en la definición y ejecución de pruebas, así como en la automatización de procesos, trabajando principalmente con Java orientado a Backend....

Grupo Digital busca un/a Senior Full Stack con base sólida en Java/Spring Boot para diseñar, desarrollar y mantener aplicaciones empresariales modernas. Trabajarás con microservicios, REST APIs y IA aplicada al ciclo de vida del desarrollo, desde generación de código hasta testing y documentación. Necesaria experiencia en backend/frontend y capacidad...

Talan Group is seeking a Big Data Developer to design and implement data solutions. You will analyze incidents in production, ensuring regulatory compliance while delivering high-quality software with cross‑team collaboration. You will document solutions in JIRA, Confluence, and ALM, certify deliveries, and manage requests to other production support...

Aircall is seeking a Senior Backend & AI Engineer responsible for designing, developing, and deploying critical AI features. With a focus on LLMs, you will be involved in building chatbots and automated content generation tools. The position emphasizes collaboration, innovation, and high-quality coding practices in a fast-paced environment. Join Aircall to...

En Exdesis buscamos un/a profesional con experiencia en desarrollo Backend para incorporarse a un proyecto tecnológico de gran alcance, participando en el desarrollo de nuevas aplicaciones y la evolución de soluciones existentes.RequisitosExperiencia senior en desarrollo Backend con Java y Spring de al menos 4 años.Conocimientos de Oracle 19 y...

Ingeniero de software senior con experiencia en Java para desarrollar interfaces de usuario y sistemas backend escalables en el sector fintech.Modalidad híbrida en Madrid.

Develop new functionalities and tools, focusing on high availability systems and scalability using NodeJS/Typescript.

Buscamos un/a Senior Backend Developer Java, con mínimo 4-5 años de experiencia para incorporarse a un equipo de producto orientado a lacreación y evolución de soluciones digitales escalables,con alto impacto en negocio.Participarás en el diseño y desarrollo de servicios backend, trabajando conJava 21, Spring Boot,microservicios, Kafka y PostgreSQL ,...

Playtomic is seeking a Senior Backend Engineer for the Payments team in Madrid. You will develop and maintain APIs and services to enable smooth frontend-backend communication and integrate third-party payment gateways to ensure secure transactions. You will work with cross-functional teams to design innovative solutions, optimize payment processing, and...

Allianz Partners is seeking a Backend Engineer in Advanced Analytics (DA3) to join our central AI team and build reusable AI foundations and production-grade AI services on a global scale.You will design, ship, and operate cloud-native systems with Docker/Kubernetes, Azure services, and CI/CD pipelines, working across ML engineers and DevOps to raise our...