Empleos de backend developer en madrid

Join Proton and build a better internet where privacy is the default Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right . Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by...

Frontend Developer en Madrid (El Escorial)Te incorporarás a un contexto profesional con modalidad híbrida en la Comunidad de Madrid, con asistencia presencial al Escorial tres días por semana. Formarás parte de un entorno técnico exigente, orientado a la estabilidad, la calidad del desarrollo y la evolución de aplicaciones utilizadas en entornos...

Rehive is building the platform that lets fintechs launch with reliable ledgers, stablecoin integrations, and developer-friendly APIs. You will design and implement backend services that handle financial transactions and ensure system reliability at scale. You will work with PostgreSQL, focus on data consistency, and leverage AI-assisted tools to accelerate...

Biorce, a Healthtech innovator, is seeking a Senior Backend Developer (Delta Team) to build and scale our internal software infrastructure from Barcelona. You will own Leadro’s backend, APIs, and data flow, while integrating with GTM tools and external systems.The role demands ownership, architecture, and mentorship to drive fast, reliable delivery. The...

SKIDATA is seeking a Backend Developer to design and implement tailored software integrations that connect third-party systems with SKIDATA products. You will work on complex access solutions and own integration projects from design through delivery in a global team. The role requires 3-5 years of backend experience with C#/.NET, REST/SOAP/gRPC, and CI/CD...

Quipu, part of TeamSystem, is hiring a Senior Backend Developer (Ruby on Rails) to evolve our SaaS platform used by thousands of customers daily. You will join a skilled Product and Technology team building backend features, improving scalability, and delivering robust services in a fast-paced, collaborative environment. You will work across the stack with...

Playson is seeking a Senior Backend Developer to build, optimise and scale high-load backend services where latency matters. You will own core features and write production-grade code daily in a distributed environment. Join a cross-functional team using Node.js/TypeScript, Kafka and cloud-native infrastructure on Kubernetes with AWS/GCP. Expect on-call...

Capitole is seeking a Backend Developer with Python and AWS to join a strategic platform team responsible for user, tenant and access management in a cloud-native ecosystem. You will contribute to disaster recovery capabilities and resilience in a regulated environment. You will build IaC with Terraform/OpenTofu, develop backend services in Python, implement...

T-Systems Iberia sucht einen Java Backend Developer zur Verstärkung des TAO-Teams. Du arbeitest an sicheren Backend-Anwendungen in Java und trägst zur Digitalisierung öffentlicher Verwaltungen bei, mit Fokus auf Architektur, Codequalität und Best Practices. Du arbeitest an Projekten in einem hybriden Modell, mit Kollegen in mehreren spanischen...

Sage is seeking a Senior Backend Developer to join our HCM localisation team based in Barcelona. In this hybrid role, you will design and maintain scalable backend services for our cloud-based enterprise product. Strong expertise in Scala, MySQL, and AWS is required. The candidate will work collaboratively to improve product performance and maintain robust...

Luxoft is seeking a Java backend developer to join a team building sophisticated software for the orthodontics industry. You will design and implement web systems, participate in code reviews and DevOps, and help steer architecture decisions in a distributed agile setting. The role requires strong backend skills (5+ years), expertise in SQL/NoSQL, and...

Sebastián Consultores selecciona para importante empresa española, principal aseguradora para el sector primario, un/a PROGRAMADOR/A RPG para reforzar el área de desarrollo y proyectos Legacy de la compañía.La persona seleccionada se encargará de:– Desarrollo de las aplicaciones con entornos iSeries: RPG, RPG IV, RPG ILE, SQL RPG (entornos legacy),...

About UBQ.IoUBQ.Io is a global technology service provider dedicated to building a more sustainable, independent, and equitable future. We partner with global companies across industries, including AI, blockchain, software, biotech, and education, to transform bold ideas into real, meaningful solutions.Our expertise spans technology consulting, AI and...

AIM Sport is seeking an AI Backend Developer in Madrid to design and build intelligent backend services that integrate AI and LLMs into products. You will develop Python-based REST APIs (FastAPI/Flask/Django REST) and build scalable server-side architectures, while orchestrating AI pipelines and ensuring robust validation of AI outputs. You will work with...

Otto Group one.O is seeking an experienced backend developer to implement and operate cloud-based business systems for a major e-commerce client in Málaga. You will design system architecture with the Product Owner and build RESTful services using Spring Boot in an international setting with German colleagues. Required 5+ years in backend using Java/Kotlin,...

Amaris Consulting is hiring a Senior Java Developer to design, develop, deploy, and operate scalable SaaS platforms for payroll and HR tech. You will join multidisciplinary squads, combining backend expertise with DevOps practices to support business-critical services through the full software lifecycle. The role requires 7+ years as a Backend Engineer with...

Una empresa de tecnología innovadora busca un Full Stack Developer (Java / React) para unirse a su equipo en el sector Retail. El puesto permite trabajar 100% remoto desde España o en formato híbrido en A Coruña. Se buscan candidatos con experiencia en Frontend y Backend, que valoren la colaboración y el crecimiento profesional. Ofrecemos condiciones...

About The RoleLeoVegas Group is building a world-class Sportsbook platform. Within the Sports domain, we work in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical, building the services that transform incoming sports, trading and pricing data into experiences used by millions of customers. We are looking...

Sage is looking for a Backend Developer to join our HCM Localisation engineering team in Barcelona. This hybrid role will focus on building scalable backend services with Scala 2.13 and Play Framework, optimizing performance and supporting complex product workflows.The ideal candidate will have strong experience with relational databases, AWS services, and...

Playson is seeking a Senior Backend Developer who thrives in a deeply hands-on environment and enjoys being close to the code daily. Focus on building, optimising, and scaling backend services for a high-load system where performance and reliability are critical. You’ll tackle complex real-time challenges at the platform core, improving latency, ensuring...