Backend Fullstack Developer Java Jobs in Spain

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Staff Backend Product Engineer — End to End Integrations

A leading e-invoicing platform in Madrid is seeking a Staff Backend Product Engineer to own integrations end-to-end. In this role, you will design and build backend systems while mentoring others, engaging with customers, and supporting product decisions. Candidates should have over 10 years of backend experienc ...

C# Backend Tools Engineer — Live Game Config & APIs

A leading gaming company is looking for a Web Tools Backend Engineer to join their team in Barcelona on a hybrid basis. This role focuses on building and evolving backend systems that power internal tools for their popular game 'MONOPOLY GO!'. Key qualifications include strong experience in C# backend developmen ...

C# Web Tools Backend Engineer — Live Game Configs

A leading mobile gaming company based in Barcelona is seeking a Web Tools Backend Engineer to enhance backend systems for their games. The role focuses on C# development, API design, and maintaining dynamic internal tools essential for game functionality. The ideal candidate should possess robust backend develop ...

GenAI Backend Engineer (Python, Docker, REST) Hybrid Madrid

Una compañía tecnológica busca un Programador AI Backend para desarrollar arquitecturas de software en Madrid. El rol incluye diseñar y mantener microservicios en Python, construir APIs RESTful y participar en proyectos de IA. Se requiere un grado en Ingeniería Informática, fuertes habilidades en Python y Docker ...

Backend Python Engineer: IoT, APIs & Cloud (Hybrid Madrid)

Una importante compañía líder en el sector energético busca un Programador Python para trabajar en Madrid. Se requiere experiencia de 3 a 5 años en desarrollo backend, con habilidades en creación de APIs y gestión de bases de datos. Ofrecen un ambiente de trabajo juvenil, modelo híbrido y desarrollo profesional. ...

Senior PHP Backend Engineer Scale SaaS for Millions

A prominent SaaS company in Barcelona seeks a skilled PHP Engineer to enhance its backend solutions. You will be integral in building the server-side infrastructure while collaborating with a multidisciplinary team. Ideal candidates will possess over 5 years of experience in back-end development, exceptional PHP ...

Backend Engineer, Supply Driver Quality (m/f/d)

Backend Engineer, Supply Driver Quality (m/f/d) Barcelona Location : Come and join us in Barcelona! We are looking for a talented and motivated Backend Engineer (m/f/d) for our Supply Driver Quality Team. As part of a highly skilled, cross‑functional team comprising ...

Senior Backend Engineer: Build Scalable, Low Latency Systems

A leading adtech company in Spain is seeking a skilled Software Engineer passionate about building scalable systems while improving product performance. The ideal candidate should have strong experience with NodeJS or Go, and a background in large-scale systems. Responsibilities include ownership of products rel ...

Staff Backend Engineer, PHP/ Go 100% remote EMEA

NOTE: This is a FULLY remote role, but the candidate must be within the European region to collaborate with their team, peers, and internal customers. You do not have to be in the specific country or city shown in this listing, but please only apply if you are physically based within the European region. < ...

Senior Golang Backend Engineer for Enterprise IT & AI

A global reinsurance company seeks a Senior Backend Engineer in Madrid. This role requires strong Golang skills to develop core backend services for an enterprise IT ecosystem. You'll work with a diverse team and contribute to system stability and AI integration. Ideal candidates have 3+ years in Golang and 8+ y ...

Backend Engineer (Ruby on Rails) — Scale Global Education

A leading language education platform seeks a Backend Engineer with Ruby on Rails experience to support B2B initiatives. The role involves building scalable backend solutions using Python/Django, improving existing systems, and collaborating with cross-functional teams. Candidates should possess strong communica ...

Remote Backend Dev — Real Time Integrations & DB Optimizer

Una Startup en Ciberseguridad busca desarrolladores para trabajar en un ambiente flexible y remoto. Los candidatos deben tener experiencia en Python y Django, y ser responsables de monitorizar servicios backend y gestionar integraciones en tiempo real. Ofrecen un contrato laborar en España y un proceso de incorp ...

Desarrollador .NET | APIs REST y Backend | Modelo híbrido

Una empresa del sector educativo en Logroño busca un/a Desarrollador/a .NET para participar en el mantenimiento y evolución de sistemas de información académicos. El candidato ideal tendrá experiencia en .NET y C#, con capacidad para implementar APIs REST y trabajar bajo metodologías ágiles. Se ofrece contrato i ...

Senior C++ Backend Engineer Finance Data Platform Remote

A leading financial services company in Madrid is searching for an experienced C++ Software Engineer. In this role, you will develop backend applications and market data services for major stock exchanges. The ideal candidate should have at least 5 years of C++ / Linux programming experience, strong communicatio ...

Senior Backend Engineer for AI Driven Voice Platform

A dynamic tech company in Madrid is seeking a Senior Backend Software Engineer to design and develop customer-centric features on their AI-powered platform. The ideal candidate will have over 6 years' experience in back-end development focusing on Typescript and AWS, emphasizing security and scalability. You wil ...

Desarrollador Backend (C++ y SQL) Bilbao (100% presencial)

Descripción del puesto Buscamos un(a) desarrollador(a) de software especializado en C++ y SQL para unirse a nuestro equipo de desarrollo ubicado en Bilbao. Responsabilidades Diseñar, desarrollar y mantener servicios backend robustos y escalables en C++. Implement ...

Arquitecto de Software Junior Backend .NET y Azure

Howden busca un/a .NET Tech Lead / Software Architect en Madrid para liderar la arquitectura de soluciones backend. Este rol es clave para diseñar soluciones robustas y escalables utilizando .NET y Azure. Se requiere experiencia sólida en el ecosistema .NET, diseño de APIs REST y dominio de SQL Server. Además, e ...

Senior AI Platform Eng: Automations & Data First Backend

Tech, una empresa con sede en Barcelona, busca un Senior Platform Engineer que contribuya a la transformación de su plataforma SaaS hacia una organización orientada por agentes de IA. El rol incluye mapear flujos operacionales, diseñar arquitecturas de sistemas backend y tener impacto directo en el negocio. Se v ...

Senior Platform Engineer AI First Backend Lead (TS)

Tech, ubicada en Madrid, busca un Senior Platform Engineer para liderar un equipo hacia la transformación hacia la IA. Este rol implica mapear flujos operacionales, diseñar servicios backend modulares y ser responsable de la arquitectura de tu dominio. Se ofrece retribución flexible, Fridays intensivos y la opor ...

Junior Backend Engineer — Learn, Build & Grow in Production

Fever, based in Barcelona, is looking for a Graduate Software Engineer to join their Backend team. This full-time role is aimed at recent graduates or final-year students eager to start a career in software engineering. Responsibilities include joining real production systems and collaborating on backend develop ...

Backend Python con Django REST Framework (Híbrido Valencia)

Adding Technology S.A. busca desarrolladores/as Python en Valencia para unirse a su equipo. Se requieren al menos 2 años de experiencia en Django REST Framework y conocimientos en Python 3.x. El puesto implica el desarrollo y mantenimiento de aplicaciones, integración con APIs, y trabajo colaborativo. Ofrecen co ...

Programador/a backend en Python (Django REST Framework)

Sobre Adding Technology En Adding Technology desarrollamos soluciones tecnológicas para sectores industriales y empresariales, con un fuerte enfoque en calidad, automatización y escalabilidad. Somos un equipo pequeño pero muy especializado, y buscamos ampliar el equipo de desarrollo con talento q ...

Senior .NET AI Backend Engineer | Hybrid (Remote/Madrid)

Axpo Group, located in Madrid, is looking for a Software Engineer to develop high-value solutions and work on AI-enabled applications. The role requires at least 5 years of experience with the .NET stack and strong backend skills. Candidates should be team-oriented and fluent in English, with German as a plus. T ...

Desarrollador/a Backend Integraciones Microsoft Dynamics/Bussines Central

Si quieres incorporarte a una compañía puntera en tecnología, con presencia internacional, actualmente estamos buscando incorporar al equipo un/a Desarrollador Backend, que se responsabilizará de diseñar y desarrollar conectores y servicios backend que integren plataformas externas de pedidos, albaranes y ...

Senior Ruby & Go Backend Engineer – Flexible Hours & Growth

Loyal Guru busca un Backend Engineer en Barcelona con experiencia en Ruby o Golang. El candidato ideal debe ser apasionado por la arquitectura de software de calidad y tener habilidades para el desarrollo de APIs REST y bases de datos SQL, especialmente PostgreSQL. Se ofrecen horarios flexibles, 25 días de vacac ...

Desarrollador Python Backend IA Generativa en GCP | Remoto

Api UX busca 3 Analistas Programadores/as Python para unirse a un proyecto estratégico en Madrid, con posibilidad de teletrabajo. Se requiere experiencia mínima de 3 años en desarrollo backend y conocimientos en Python, Flask, y Google Cloud Platform. Se ofrecen beneficios como contrato indefinido, 23 días de va ...

Senior Backend Engineer: High Perf Python/C++ | Hybrid

Tecdata en Madrid busca un/a Desarrollador/a Senior Backend con al menos 5 años de experiencia. El proyecto está orientado al sector bancario y requiere habilidades avanzadas en Python y C++. Se busca una persona que trabaje con bases de datos en memoria y tenga experiencia en integración de APIs. Se ofrece un c ...

Software Development Engineer: End to End, Scalable Backend

A leading global technology company is seeking a Software Development Engineer in Madrid. You will be responsible for the full software development life cycle, from design to testing. The ideal candidate will have experience in software development, system design, and proficiency in programming. Join a collabora ...

Remote Backend SaaS Engineer for Open Source Landscape

A leading open-source software provider is looking for an Entry-Level Software Developer to join their team. This role involves writing high-quality code, collaborating with a distributed team, and supporting development processes using Python. Ideal candidates should have a Bachelor's degree in Computer Science ...

Remote Backend SaaS Engineer for Open Source Landscape

A leading open-source software provider is looking for an Entry-Level Software Developer to join their team. This role involves writing high-quality code, collaborating with a distributed team, and supporting development processes using Python. Ideal candidates should have a Bachelor's degree in Computer Science ...

Senior Backend Engineer Real Time Data Pipelines & AI

A tech company specializing in Retail Intelligence seeks a Senior Backend Engineer to join their team in Valencia. You will design and maintain core backend services and large-scale data pipelines, ensuring efficient data movement and processing. The ideal candidate has over 5 years of experience in backend deve ...

Senior Backend Engineer Real Time Data Pipelines & AI

A tech company specializing in Retail Intelligence seeks a Senior Backend Engineer to join their team in Valencia. You will design and maintain core backend services and large-scale data pipelines, ensuring efficient data movement and processing. The ideal candidate has over 5 years of experience in backend deve ...

Python Backend Engineer for AI Driven Systems (Madrid)

A premier AI solutions provider located in Madrid is seeking a Software Development Engineer to ensure the robustness and scalability of backend systems. Applicants should have strong skills in Python and experience with frameworks like FastAPI, Django, or Flask. The role offers an indefinite full-time contract ...

Remote Backend Dev — Real Time Integrations & DB Optimizer

Una Startup en Ciberseguridad busca desarrolladores para trabajar en un ambiente flexible y remoto. Los candidatos deben tener experiencia en Python y Django, y ser responsables de monitorizar servicios backend y gestionar integraciones en tiempo real. Ofrecen un contrato laborar en España y un proceso de incorp ...

Remote Backend Dev — Real Time Integrations & DB Optimizer

Una Startup en Ciberseguridad busca desarrolladores para trabajar en un ambiente flexible y remoto. Los candidatos deben tener experiencia en Python y Django, y ser responsables de monitorizar servicios backend y gestionar integraciones en tiempo real. Ofrecen un contrato laborar en España y un proceso de incorp ...

Senior Backend Engineer – Scalable Game Services (Golang/PHP)

A renowned mobile game studio is seeking a Backend Engineer to develop backend applications for popular games. Candidates should have at least 3 years of experience in backend engineering and familiarity with PHP and Golang. The position requires collaboration with various roles, including mobile developers and ...

Senior Backend Engineer Scale Global Games (Golang/PHP)

A global leader in interactive entertainment is seeking a Backend Engineer to develop scalable backend applications that support millions of global users. The ideal candidate will have at least 3 years of experience in backend development, proficient in Golang and PHP. The role involves collaboration with variou ...

Founding Backend Architect for Generative AI Hub Valencia

Una empresa de tecnología financiera busca un Founding Engineer en Valencia, España. La posición, que opera en un entorno híbrido, implica diseñar arquitecturas backend y utilizar herramientas de IA generativa. Se requiere más de 5 años de experiencia en desarrollo de sistemas backend, y conocimientos sólidos en ...

Backend Engineer Real Time Ad Platform, High Volume

A tech-driven company in Spain seeks a Backend Engineer to develop high-performance systems for an Ads platform, focusing on scalability and reliability. The role requires 3-4 years of software development experience, proficiency in Python/Django, and strong knowledge of distributed systems. You will architect c ...

Senior C++ Backend Engineer Finance Data Platform Remote

A leading financial services company in Madrid is searching for an experienced C++ Software Engineer. In this role, you will develop backend applications and market data services for major stock exchanges. The ideal candidate should have at least 5 years of C++ / Linux programming experience, strong communicatio ...

Senior Backend Engineer — Cloud Native, Scalable Bets Platform

A leading sports technology company in Madrid is seeking a Senior Backend Engineer. You will collaborate with diverse teams to build scalable software solutions and enhance platform capabilities. Ideal candidates have over 5 years in software engineering, experience with cloud technologies, and a passion for cre ...

Senior Backend Engineer: Build Scalable, Low Latency Systems

A leading adtech company in Spain is seeking a skilled Software Engineer passionate about building scalable systems while improving product performance. The ideal candidate should have strong experience with NodeJS or Go, and a background in large-scale systems. Responsibilities include ownership of products rel ...

Backend Engineer (Go/PHP) E commerce, AWS, Barcelona

An established e-commerce company in Barcelona is seeking a Backend Engineer to join their team. The role involves tackling complex challenges, collaborating closely with QA, and boosting system performance and stability. Candidates should have solid experience in PHP and familiarity with Golang and AWS. The pos ...

Backend Engineer, AI Powered Fintech (Hybrid) Stock Options

A fintech startup in Barcelona is seeking a Backend Engineer to develop backend solutions for an AI-driven debt collection platform. In this role, you'll be responsible for designing and testing systems that handle high-volume communications. Ideal candidates will have 3+ years of experience in backend services, ...

Senior Backend Engineer Scale Secure Cloud Voice Platform

A technology-driven communications company is seeking a Senior Backend Software Engineer to design, develop, and deploy business-critical features. You will work with a variety of back-end stacks hosted on AWS, ensuring high-quality and secure voice solutions. Ideal candidates have over 6 years of back-end devel ...

Desarrollador/a Backend Integraciones Microsoft Dynamics/Bussines Central

Si quieres incorporarte a una compañía puntera en tecnología, con presencia internacional, actualmente estamos buscando incorporar al equipo un/a Desarrollador Backend, que se responsabilizará de diseñar y desarrollar conectores y servicios backend que integren plataformas externas de pedidos, albaranes y fac ...

Senior Backend Architect — Build the Semantic AI Core

A tech startup specialized in AI solutions is seeking a talented Backend Engineer in Barcelona to design and develop a semantic core that transforms raw enterprise data into meaningful insights. Candidates should have solid experience in data-intensive systems and a pragmatic approach to technology choices. The ...

Senior Backend Engineer Scale AI Driven Cloud Apps

A growing tech company in Madrid is seeking a Senior Software Engineer to join their engineering department. You will design, develop, and operate critical features while mentoring team members. The ideal candidate has 7+ years of experience in back-end development with TypeScript and NodeJS, alongside extensive ...

Senior Backend & Full Stack Engineer for AI Trials

Cori Clinical in Barcelona is seeking a Lead Backend / Full-Stack Engineer for its foundational engineering team. In this senior role, you will design and build the backend systems and APIs that power our clinical trial platform. Ideal candidates will have strong experience in backend or full-stack engineering, ...

Desarrollador/a Backend Integraciones Microsoft Dynamics/Bussines Central

Si quieres incorporarte a una compañía puntera en tecnología, con presencia internacional, actualmente estamos buscando incorporar al equipo un/a Desarrollador Backend, que se responsabilizará de diseñar y desarrollar conectores y servicios backend que integren plataformas externas de pedidos, albaranes y fa ...

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    Backend Fullstack Developer Java Jobs in Spain Job Search Guide, Trends and Insights