Empleos de senior java backend engineer en Madrid

Mambu Payments (formerly Numeral) is hiring Senior Backend Software Engineers to help build the next generation of bank connectivity and payment automation products with a focus on security, stability and performance.You will own architectural decisions for high-impact projects, collaborate with Product Managers and DevOps, mentor engineers, and contribute...

Merlin Digital Partner is seeking a Senior Software Engineer (Python) to design backend systems, cloud infrastructure and APIs powering its connected health technologies. You will work closely with Product, AI, Embedded and Frontend teams to deliver scalable, reliable software across the stack.You will own architectural decisions, build robust APIs, optimize...

AiFi is seeking a Backend Software Engineer to optimize highly concurrent systems and scale our store operating systems from small to large venues. You will shape core backend microservices and collaborate with app developers and product managers to address real-world use cases and bottlenecks. Join a platform that enables real-time analytics and scalable...

Apipana.Io en Sevilla busca un Senior Software Engineer para diseñar y desarrollar soluciones backend escalables, robustas y mantenibles, asegurando altos estándares técnicos. Serás nexo entre engenharia y arquitectura del cliente, traduciendo requisitos de negocio en soluciones técnicas viables y liderando decisiones de diseño.Trabajarás con...

Aircall, a unicorn AI-powered customer communications platform, is hiring a Senior Backend Engineer in Madrid. You will design, build, test, and deploy backend systems using TypeScript/Node.Js with a strong emphasis on security, scalability, and performance.Collaborate with product managers, designers, and engineers to deliver end-to-end solutions, mentor...

Timup, consultora de selección, busca un/a Senior Backend Developer para evolucionar y modernizar una plataforma tecnológica en un entorno con microservicios en producción. Trabajarás con Symfony, Laravel y Node.js, migrando legacy de Laravel y consolidando servicios para una arquitectura óptima. Se requiere experiencia sólida en PHP 8.2+,...

Vortech PCI Group busca un/a Senior Backend Developer para unirse a un nuevo hub de Inteligencia Artificial Generativa en Valencia, dentro de una organización internacional del sector financiero.La persona seleccionada participará desde el inicio en la definición y construcción de una plataforma de Agentic AI sobre Azure, contribuyendo a decisiones de...

Ciklum in Málaga, Spain, is seeking a Senior Python Engineer to join a cross-functional team building backend features. You will implement AI on the client's internal platform, support high-quality code, and collaborate across planning, development, testing, and deployment.The role emphasizes PostgreSQL design, Alembic migrations, and REST API work, with a...

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...

Stark Future SL is seeking a Senior Backend Engineer to design, develop, and operate production web services that power our AI-enabled backend. You will own critical components and collaborate across product, AI, and operations teams in a fast-moving Barcelona-based environment. Join a ambitious team building premium electric motorcycles and a scalable...

Finom is seeking a Senior Backend Engineer who thinks like a product builder and thrives in a collaborative cross-functional team. You’ll own backend systems, focusing on robust, scalable financial infrastructure, in a domain team with frontend, mobile, ML/AI, and QA partners across Europe. You’ll bring deep .NET/C# expertise, experience with...

Join our expanding engineering team! We're actively recruiting a Senior Backend Engineer to help scale M-KOPA Mobility, our fast-growing e-mobility business. This is an initial 12-month Fixed Term Contract, with the potential to extend or transition into a permanent role. Build the event-driven microservices that power clean, affordable transport for riders...

Affinity (CRM) in Barcelona is seeking a Senior Software Engineer to join the One Platform team and help drive the technical roadmap and implementation of Internal and External API layers, the 3rd party integration platform, and access management systems.The role is hub‑hybrid, with team members in-office 2 days per week, collaborating across engineering,...

Trading 212 is seeking Senior Backend Engineers to own backend services end to end across a microservices platform. You will design, build, test, deploy and operate production systems, collaborating with product and engineering teams to turn complex requirements into durable solutions. You’ll work with Java, Go, Node.js and databases, focus on performance,...

SCI ServiClients in Barcelona is seeking a senior QA automation engineer to design, build and own automated test coverage for a cloud-based learning platform. You will focus on backend services, API testing and contract validation. The role involves OpenAPI, OAuth2 interactions, CI/CD in GitHub Actions, and running tests in containerised environments with...

MediaMarktSaturn Plattform Services GmbH in Barcelona is seeking a senior backend developer to design, implement and operate scalable services for our Global Loyalty ecosystem. You will work with Kotlin, GCP, and modern DevOps practices to deliver reliable solutions that power millions of interactions across Europe.The role emphasizes event-driven...

Lever, Inc. is seeking a Senior Backend Engineer – Data Core for a partner company based in Spain. You will design and run data infrastructure powering a large-scale creator data platform, handling 400M+ creator profiles across Instagram, TikTok, and YouTube.This remote-first role emphasizes autonomy, end‑to‑end ownership, and cost-efficient, reliable...

HireHi in Barcelona is seeking an experienced backend engineer to own end-to-end delivery of product features, from requirements through production, ensuring quality and customer value.You will collaborate with product and technical teams to manage dependencies, mentor junior engineers, and contribute to architecture while raising engineering standards. The...

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Backend Software Engineer – Future Hiring Program based in Spain.Join a forward-thinking engineering team delivering high-impact software solutions for global enterprise clients across diverse industries.As part of a...

En Métrica ConsultingBuscamos un/a Backend Developer con experiencia en JAVA para incorporarse a un proyecto estratégico de desarrollo de microservicios.La misión del puesto será implementar microservicios bajo la guía de perfiles senior, participando activamente en el desarrollo de la lógica de negocio, consumidores Kafka, persistencia de datos y...