Empleos de senior backend engineer java en Madrid

Playtomic seeks a Senior Backend Engineer to build robust APIs and scalable services. You will own domain decisions in a pod, collaborating with product and frontend teams to ship secure, high-performance backend systems.Strong Java Spring Boot, API design, and distributed systems experience are essential, with a focus on production health and AI-assisted...

Kraken is seeking a Senior Software Engineer to lead the Consumer team, owning the architecture of Rust backend services powering trading, payments, and crypto experiences. You will drive end-to-end ownership, mentor engineers, and collaborate with product leadership to shape roadmaps.A strong emphasis on AI-assisted development and high-quality user...

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...

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...

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...

T-Systems Iberia sucht einen Senior Backend Engineer, der zentrale Plattform-Services, API-Design und robuste Microservices für skalierbare KI-Infrastruktur entwickelt. Sie arbeiten eng mit ML-Infrastrukturteams zusammen und verantworten Sicherheit, Observability und CI/CD.Sie verfügen über umfangreiche Python-/API-Entwicklung, verteilte Systeme,...

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+,...

CrowdFarming está buscando un Senior AI & Backend Engineer para trabajar en una plataforma tecnológica distribuida en producción, con foco en IA, agentes y automatización. Se requieren sólidos conocimientos en Node.Js/TypeScript, NestJS y AWS, y experiencia en sistemas observables y pruebas modernas.El rol implica diseñar e implementar soluciones...

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,...

Kairós está buscando un Lead Backend Engineer para liderar la modernización de sistemas críticos y la migración de arquitecturas legacy. Serás el referente técnico, guiarás a ingenieros y definirás decisiones arquitectónicas transversalmente.Trabajarás con Java 21, Spring Boot, en entornos cloud (AWS/GCP) con IaC, CI/CD e integración de IA como...

OneSpan in Barcelona is seeking a Senior Backend Engineer to join our backend team and drive product features from concept to production. You will own delivery, work with leadership, and shape architecture.The role requires a decade of backend experience, strong Java and Spring Boot, SQL, AWS, and Kubernetes, plus excellent cross-functional collaboration and...

Empresaconfidencial busca un/a Senior Backend AI Engineer para impulsar IA en productos ya en producción y desarrollar nuevas soluciones desde cero.Diseñarás servicios backend en Python, construirás pipelines RAG y integrarás APIs de LLM en entornos productivos, asegurando observabilidad y rendimiento.Trabajo 100% remoto desde España, con autonomía...

Parser is seeking a seasoned Golang Backend Engineer to help build large-scale platforms and services. You will work with cross-functional teams, implement robust microservice patterns, and drive API-first development in a FinTech context. Join a fast-growing team of 340+ engineers across Europe with flexible, remote-friendly work options in Spain. Expect...

Swiss Re, a global leader in reinsurance and risk transfer, seeks a Senior Backend Engineer to shape engineering across backend services, integrations and automation. You will mentor peers, contribute to AI/automation capabilities, and work on scalable solutions within the IT Resilience unit. You will join the SACM team and collaborate across Enterprise data...

At Accenture, we believe in technology as the engine for the total reinvention of the company. We work with the leading platforms and partners in the market to drive our clients' businesses through digitalization, AI, and data. Are you a passionate Software Engineer with experience across the stack including Microservices, Event Architectures, Container...

Solera Holdings, LLC. is seeking a Software Developer for Java (P3) to join the Product Development team in Madrid. You will deliver customer-facing and internal applications, champion modern tech, and collaborate across domains to ensure quality and standards.The role emphasizes agile delivery, software craftsmanship, and ongoing improvement in a fast-paced...

Buscamos un **Senior AI & Backend Engineer & Front** **Requisitos Técnicos** Experiencia real y reciente construyendo o aplicando en producción sistemas de agentes/subagentes IA: orquestación de tareas, definición de skills, gestión de contexto, tool use/function calling. Dado que la disciplina es muy reciente, valoramos proyectos concretos y...

Se busca Ingeniero Backend Senior Fundador para construir la plataforma core de una startup Deep Tech, encargándose de APIs, autenticación, autorización, multi-tenancy, integración con datos e IA, y observabilidad.

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,...