Java Fullstack Backend Developer Jobs in Spain

Professional job seekers finding Spain jobs through Expertini
750,000+ professionals on Expertini 750,000+ Candidates
Join our global community
Expertini Penguin Mascot Resume Score™
Resume Score™ Instantly
Upload Your CV
Quick 30-second process

Apply Today & Jumpstart Your Career on Expertini, Trusted Since 2008.

Reset

Create Job Alert

 
   
Reset

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Staff Backend Engineer

At Genestack we are tackling the underlying computational and scientific challenges of bioinformatics in order to provide researchers with software tools that will streamline the discovery process and drive forward precision medicine, drug development, and bioinformatics research. Our platfo ...

Backend Engineer Intern

Overview At ING we are looking for Backend Engineer Intern Your role and work environment: We are looking for a talented and enthusiastic Backend Engineer Intern to join our Team . You will be part of our IT Engineering community. You will learn about the ING W ...

Desarrollador/a Backend

Talan is an international consulting group specializing in innovation and business transformation through technology. With over 7,200 consultants in 21 countries and a turnover of €850M, we are committed to delivering impactful, future-ready solutions. Overview Headquartered in Paris and op ...

Senior Backend Engineer

Overview It’s an exciting time to join us! We’re entering new markets, developing new technologies, and moving step by step towards our goal of exciting the world. As our business grows, the number of exciting people initiatives grows with it, and we’re looking for a new colleague to partner with ...

Senior Backend Engineer

Overview SplitMetrics is a global software company offering an ecosystem of products and services that serve as a growth engine for top mobile-first businesses worldwide. Our ecosystem includes: SplitMetrics Acquire, a platform for automating and optimizing Apple Ads. Spli ...

Staff Backend Engineer

Join OLX And See How Far You Can Go. We are looking for a Staff Backend Engineer! Join our GenAI Engineering team working remotely from Spain. Are you someone who is craving scalable problems and dealing with optimizations? You will work with a creative, critical and a well-organized team from th ...

Senior Backend Engineer

At Cirql One, we are building the foundational layer that connects enterprise data to AI: a layer that doesn't just relay information, but genuinely understands it, making business meaning explicit, trusted, and actionable at scale. The problem we're solving is deceptively hard. SAP runs the core o ...

Staff Backend Engineer

WELCOME TO OLX We're building marketplace sustainable ecosystems that millions of people depend on every month – to buy and sell cars, find homes, land jobs, and trade secondhand goods. It's commerce that matters:safe,smart, andenvironmentally responsible. We ...

Desarrollador/a Backend

¡Impulsa tu carrera con TUYÚ Technology! ¿Te apasiona la tecnología y buscas un desafío que realmente marque la diferencia? Estamos en la búsqueda de un/a Desarrollador/a Backend con experiencia de al menos 2 años. Buscamos una persona motivada, colaborativa y con interés en seguir desarrollando ...

Backend Engineer senior

Desde Connecting Visions estamos acompañando a un cliente en la búsqueda de un/a Backend Engineer senior en Madrid Desde Connecting Visions colaboramos con una empresa en la creación de un producto digital nuevo, donde el backend es la columna vertebral del producto, no solo una capa técnica. Buscamo ...

Senior Backend Engineer

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We’re redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace. Our ...

Backend Engineer (Python)

Backend Engineer (Python, Kubernetes, AWS) Barcelona, Spain • Full-time regular application live. Datavant is a data collaboration platform trusted for healthcare. Guided by our mission to make the world’s health data secure, accessible and actionable, we provide critical data solutions acr ...

Programador Backend Senior

Nuestro cliente es una empresaespecializada en consultoría, desarrollo e implementación de soluciones basadas en Sistemas de Información Geográfica (GIS). Con más de dos décadas de experiencia, colabora con entidades públicas y privadas, ofreciendo servicios tecnológicos innovadores y personalizados para l ...

Backend Product Engineer

TL;DR We’re a global e-invoicing platform operating in 25+ countries. Revenue grew 10x last year, and we plan to 3x in 2026. Role: own integrations end-to-end — research, define, build, ship, and iterate with customers. Looking for: 1–10 y ...

Backend Product Engineer

TL;DR We’re a global e-invoicing platform operating in 25+ countries. Revenue grew 10x last year, and we plan to 3x in 2026. Role: own integrations end-to-end — research, define, build, ship, and iterate with customers. Looking for: 1–10 y ...

Data Engineer + Backend

Join us to apply for the Data Engineer + Backend role at Plexus Tech . We are looking for professionals with at least four years of experience in data engineering and software development. Requirements Backend development (Java, Spring Boot, Pytho ...

Programador AI Backend

Empresa: Confidencial / Proyecto internoUbicación: Madrid (3 días oficina, 2 días teletrabajo)Modalidad: HíbridoSalario: 32.000 € / año Descripción del Puesto Buscamos un Programador AI Backend para unirse a nuestro equipo en el des ...

Senior Backend Engineer

Adikteev fuels the app ecosystem by inspiring users to engage with the apps they know and love. Specializing in user retention, we grow in-app revenue and build user loyalty with custom retargeting and CTV campaigns. Operating globally from Paris, San Francisco, and Seoul, Adikteev has grown to over ...

Senior Backend Engineer

Aircall is a unicorn, AI-powered customer communications platform used by 22,000+ companies worldwide to drive revenue, resolve issues faster, and scale customer-facing teams. We’re redefining customer communications by bringing voice, SMS, WhatsApp, and AI together into one seamless workspace. Our ...

Backend Software Engineer

At Fourthline, our mission is to fight financial crime. We help protect the global financial system by verifying millions of identities for banks, neobanks, online brokers, crypto exchanges, and insurers like N26, Trade Republic, flatexDEGIRO, Nationale Nederlanden, Qonto, Shine, Solarisbank, and more. </p ...

Backend Senior Engineer

En Kenos Technology buscamos incorporar de forma urgente dos perfiles de Backend Senior para un importante cliente del sector bancario-financiero . Se trata de una oportunidad bajo modalidad Time & Materials , por lo que necesitamos se ...

Desarrollador Backend WMS

Desarrollador/a Backend (Java) – Sector Logística / WMS – Proyectos internacionales Formarás parte del equipo de desarrollo IT para el sur de Europa de una multinacional líder en automatización de almacenes (intralogística). Trabajarás en proyectos llave en mano para grandes marcas (moda, alimenta ...

QA Backend & Platform

¿Quieres formar parte de nuestro equipo de Calidad ? ¿Te gustan los retos ? Pues esta es tu oportunidad ... En Facephi, estamos buscando un QA Backend & Platform para que se unan a nuestra gran familia. Si tienes ganas de añadir valor al equipo y asumir ...

Backend Senior Engineer

En Kenos Technology buscamos incorporar de forma urgente dos perfiles de Backend Senior para un importante cliente del sector bancario-financiero . Se trata de una oportunidad bajo modalidad Time & Materials , por lo que necesitamos ser rápidos en la búsqueda para iniciar cuan ...

Backend Technical Lead

Buscamos un Backend Tech Lead con experiencia para liderar el equipo de backend en Cívica, una consultora tecnológica que combina datos y desarrollo de software para impulsar soluciones a medida. Responsabilidades Liderar técnicamente al equipo de backend: acompañar, mentorizar y ha ...

BACKEND HÍBRIDO MÁLAGA

Buscamos un/a Backend Engineer para nuestras oficinas de Málaga, con experiencia en frameworks como Spring / Springboot y en procesamiento de datos de tiempo real (Kafka Streams/Flink). 1/2 años de experiencia. Cómo será tu día a día Estamos buscando un Back Engineer para incorpor ...

🚀 Boost Your Hiring Chances with Our AI-Powered Tool-Kit

Stand out from thousands of applicants. Use our proven career tools to optimize your applications and land your dream job faster.

To-Do Planner

Organize your job search and personal tasks. All data is confidential.

Open Planner

Wellbeing Center

Access your confidential wellness report and resources to manage job search stress.

Check Wellbeing

Skill Coach

Plan your skill development with O*NET support to stay competitive in your field.

Start Coaching

Outfit Helper

Get AI-powered suggestions on what to wear for your next interview.

Find Outfit

Income Tax Calculator

Plan your finances with our calculator, updated for 2025 tax regulations.

Calculate Tax

Salary Benchmark

Get accurate, AI-supported salary trends to know your worth and negotiate better.

Check Salaries

Interview Practice

Practice for any interview with AI-enabled Q&A sessions. All data is private.

Start Practicing

Interview Predictor

Use our AI-supported tool to predict potential interview questions based on your resume.

Predict Questions

Interview Practice Timer

Use our mock interview trainer to perfect your answers under timed conditions.

Start Timer

Behavioral Mastery

Ace tricky behavioral interviews with our AI-powered practice module.

Master Answers

Question Journal

Confidentially record interview questions you were asked for future reference.

Open Journal

Interview Ace

A comprehensive tool to help you master every aspect of your interviews.

Become an Ace

Q&A Logs

Confidentially track your answers to common questions and refine them over time.

View Logs

Application Planner

Schedule and organize your job applications in one confidential planner.

Open Planner

Cover Letter Tool

Create perfect, tailored cover letters for each application with AI support.

Generate Letter

Resume Score

Get instant feedback on your resume with our NLP-supported analysis tool.

Check My Score

ATS Score

Check your resume's compatibility with Applicant Tracking Systems (ATS).

Check ATS Score

Application Analyzer

Use AI to analyze job descriptions and optimize your application materials.

Analyze Application

Career Visualizer

Confidentially plan and visualize your long-term career path and goals.

Visualize My Career

Offer Genius

Get intelligent insights and strategies to confidently negotiate job offers.

Negotiate Offers

JobFlow

Track your entire job search progress from application to offer with this intelligent tool.

Track My Flow

JobSense

Our intelligent matching engine that provides smart job recommendations.

Get Smart Matches

Networking Toolkit

Tools to build and manage your professional connections. All data is confidential.

Build Network

Professional CV

A classic, O*NET supported template for corporate and professional roles.

Use This Template

Executive CV

A premium, O*NET supported template designed for senior and C-level positions.

Use This Template

Modern CV

A fresh, stylish, O*NET supported template perfect for tech and modern industries.

Use This Template

Creative CV

A visually distinct, O*NET supported template for design and artistic roles.

Use This Template

Minimalist CV

A clean, simple, O*NET supported template that focuses purely on content.

Use This Template

Europass CV

The standard European Union recommended format for wide compatibility.

Use This Template

Student CV

An institution-recommended template perfect for internships and first jobs.

Use This Template

Graduate CV

An institution-recommended template for recent graduates entering the workforce.

Use This Template

Academic CV

The researcher-recommended format for roles in academia and research.

Use This Template

Developer/IT CV

A tech-savvy recommended template to highlight your technical skills.

Use This Template

Skilled Worker CV

A trades-recommended template to showcase hands-on skills and experience.

Use This Template

Monochrome CV

A sleek, black-and-white, O*NET supported template for a professional look.

Use This Template

Art CV

An artist-recommended template that allows your creativity to shine.

Use This Template

Harvard CV

A researcher-recommended template based on the classic Harvard format.

Use This Template

Volunteer Research

Help us improve our platform by joining our community research program.

Join Research

Review Us

Share your experience with our tools to help other job seekers.

Share Experience

Register

Create your free account to save jobs, build your profile, and track applications.

Create Account

Login

Access your dashboard, manage applications, and continue your job search.

Access Your Account

Profile Builder

Create a comprehensive professional profile that attracts recruiters and showcases your skills.

Build Your Profile

View Profile

See your public profile exactly as employers will see it. Make sure it's perfect.

Preview Profile

Bookmarked Jobs

Keep track of all your saved job opportunities in one organized place.

View Saved Jobs

Your Reviews

View and manage all the company reviews you've submitted.

See Your Reviews

Following

Manage the list of companies you follow to stay updated on their new openings.

Manage Following

Find Companies

Discover and research top employers in your country and industry.

Discover Employers

Standalone CV Builder

Use our O*NET supported CV builder to create a professional resume from scratch.

Build Your CV

PDF to DOC (Beta)

Convert your PDF resumes or documents into editable Word (DOC) format.

Convert PDF

DOC to PDF (Beta)

Create universally compatible PDF documents from your Word (DOC) files.

Create PDF

General FAQ

Find answers to common questions about our job site and platform.

Read FAQ

Job Seekers FAQ

Get help and find answers to questions specifically for job seekers.

Get Help

Job Matching

Learn about the technology and algorithms behind how we match you to jobs.

Learn How

Personalized Matching

Discover how we use your profile and activity to provide customized job suggestions.

Learn More

Quick Apply

Understand our fast application process and how to make the most of it.

Learn More

Alert Frequency

Learn how to manage your job alert settings so you get the updates you want.

Manage Settings

Job Alerts Guide

A complete guide to understanding how job alerts work and how to use them effectively.

Read Guide

Resume Matching

Learn how our system matches your resume to job requirements.

Learn More

Ethical Branding

Read our guide to building a professional and ethical personal brand.

Read Guide

Candidate Visibility

Learn how to increase your visibility to recruiters on our platform.

Increase Visibility

Verified Badge

Find out how you can get a verified badge to build trust with employers.

Get Verified

AI ATS Technology

Learn about the advanced AI and ATS technology that powers our platform.

Learn More

ATS Ranking

Understand how Applicant Tracking Systems rank you as an applicant.

Learn More

Semantic Matching

Learn how our AI-powered semantic matching goes beyond keywords.

Learn More

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