Junior Backend Developer jobs in Madrid – Page 2 | RoboApply Jobs

Junior Backend Developer jobs in Madrid· Page 2

Results 21–40 of 257 for “Junior Backend Developer” in Madrid.

257 jobs found

21 - 40 of 257 Jobs
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docplanner logo
Full-time|On-site|Madrid

Are you passionate about leveraging AI technologies to enhance backend systems? Join docplanner as a Backend Engineer specializing in AI Integration. In this role, you will collaborate with a dynamic team to design, develop, and implement innovative solutions that integrate AI capabilities into our existing systems.Your expertise will contribute to optimizin…

Apr 9, 2026
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causaprima logo
Full-time|On-site|Madrid

As a Senior Backend/Platform Engineer at causaprima, you will be responsible for the foundational platform utilized by our agents. Your expertise will enhance our event-driven architecture, streamline data pipelines, integrate with customer accounting systems, and ensure that our infrastructure is reliable, auditable, and efficient.Key ResponsibilitiesEvent Store Management — Design and maintain an append-only PostgreSQL database featuring tamper-evident hash chaining, real-time event distribution, agent replay, recovery capabilities, and schema versioning.Cryptographic Signature Infrastructure — Establish key management and signature verification systems for all agent events while implementing approval chains for external actions.Workflow Constraint Engine — Develop a gateway to verify authorization for any external actions including emails, payments, or API calls.PII Vault & GDPR Compliance — Create isolated, encrypted storage solutions for personal data, ensuring compliance with the right to erasure and data residency requirements.Multi-Tenancy Management — Implement row-level security and tenant isolation across all data stores, including tenant-scoped LLM API keys.Authorization Framework (Cerbos) — Utilize attribute-based access control for both agents and humans, ensuring deterministic policy evaluation where LLMs do not make authorization decisions.MCP Security Layer — Develop authentication, capability-based scoping per partner, and rate limiting for the Model Context Protocol endpoint.Database Architecture — Focus on PostgreSQL schema design, indexing strategies, performance tuning, and read replica topology.

Mar 15, 2026
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airapps logo
Full-time|On-site|Madrid

Role Overview airapps is hiring a Backend QA Engineer based in Madrid. This position focuses on quality assurance for backend systems, helping to keep applications reliable and up to standard. What You Will Do Support QA processes for backend applications Work closely with team members to identify and resolve issues Help ensure applications perform as intended and meet quality expectations Who We’re Looking For Detail-oriented approach to testing and problem-solving Comfortable working within a collaborative team Motivated to deliver solid, dependable software Location This role is based in Madrid.

Apr 16, 2026
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Aircall logo
Full-time|On-site|Madrid Office

Join Aircall, a unicorn and AI-driven customer communications platform, serving over 22,000 companies globally. We are innovating the way businesses communicate by seamlessly integrating voice, SMS, WhatsApp, and AI into a unified workspace.Our growth stems from a straightforward principle: empower teams to work more efficiently. Our AI Voice Agent automates routine calls, AI Assist enhances post-call tasks, and AI Assist Pro provides real-time support, enabling individuals to excel in their roles. This leads to increased revenue, quicker resolutions, and confident team scalability.With headquarters in Paris and a robust North American presence in Seattle, alongside teams in Madrid, London, Berlin, San Francisco, New York City, Sydney, and Mexico City, we have developed a beloved product and a rapidly expanding business, supported by top-tier investors and driven by swift AI advancements across various product lines.At Aircall, you will be part of a dynamic organization. We are ambitious, focused on product excellence, and committed to execution, ensuring visible impacts, quick decisions, and genuine growth.Our Work Culture: We are deeply customer-focused, data-informed, and dedicated to delivering significant outcomes. We prioritize ownership, ongoing learning, and a thoughtful pace. If you thrive in a collaborative, fast-paced setting where trust and impact are key, you will feel right at home here.Role Overview:As a Senior Backend Software Engineer, you will play a crucial role in designing, developing, deploying, and maintaining essential features that enhance customer value through voice integration.You will be expected to advocate for best practices and provide mentorship within your team and across the engineering department.We are driven by quality, excellence, and agility, and you will contribute to elevating these standards.Utilizing a diverse range of backend technology stacks, tailored to meet specific needs and consistently hosted on AWS, we create resilient services that add value to voice integration and seamlessly connect with our clients' critical business tools such as CRM, Helpdesk, E-Commerce, and more.

Feb 13, 2026
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Destinus Group logo
Full-time|On-site|Madrid, Community of Madrid, Spain

About the RoleKickstart your aerospace career by collaborating with experienced engineers to understand how intricate systems are integrated into actual flight hardware. This position is tailored for aspiring electronics engineers eager to accelerate their growth, learn through hands-on experience, and transition into full system engineers while actively contributing to vital defense projects from day one.At Destinus, we are pioneering advancements in the defense sector through state-of-the-art Unmanned Aerial Vehicles (UAVs). Our groundbreaking technologies are crafted to fulfill the distinct requirements of contemporary defense operations, ensuring unmatched speed, accuracy, and cost-efficiency. We collaborate with government entities and defense organizations globally to deliver advanced solutions for mission-critical tasks, ushering in a new era of operational efficiency and technological dominance. Join us in redefining the future of defense through innovative aerospace solutions.ResponsibilitiesAssist senior and lead engineers with daily electronic and system engineering tasks across various programs.Support the integration of electronic subsystems into larger aerospace assemblies.Actively engage in test preparations, including hardware setup, instrumentation, and test configurations.Provide hands-on assistance during testing phases, including execution, monitoring, and basic troubleshooting.Gather, organize, and evaluate test data to support engineering analyses and design enhancements.Identify testing issues and collaborate with senior engineers to uncover root causes.Contribute to the development, revision, and upkeep of technical documentation and test reports.Encourage ongoing improvement initiatives within engineering and testing workflows.Coordinate with cross-functional teams such as software, mechanical, and test engineers to ensure seamless system integration.Gradually take ownership of defined tasks and subsystems as your technical expertise and confidence grow.Learn system engineering principles through direct project involvement, with a clear trajectory toward becoming a system engineer.

Feb 18, 2026
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Fever logo
Full-time|On-site|Madrid

Hello! We are Fever, the leading technology platform in the realm of culture and live entertainment.Our mission is to make culture and entertainment accessible to everyone. Through our innovative technology and data-driven strategies, we are transforming how people engage with live events. Each month, our platform inspires over 300 million individuals across more than 40 countries to discover remarkable experiences while also equipping event creators with our technological insights to help them expand and elevate their events to reach broader audiences.Our achievements include collaborations with prominent industry leaders such as Netflix, F.C. Barcelona, and Primavera Sound, and we have been honored with international awards for our unique experiences. Impressive, right?To further our mission, we seek proactive individuals with a hands-on approach who are excited about shaping the future of entertainment!Are you ready to join the experience?Now, let’s delve into the specifics of this role and how you will contribute to Fever’s mission.About The Role:You will oversee the entire lifecycle management of major events from when the sales and legal teams finalize the commercial contract until the event's successful conclusion.As the primary liaison, you will communicate with all stakeholders, including event organizers and various internal teams.While you will be the overall owner of the process, you will collaborate within a team, ensuring timely execution by managing tasks across different departments.You will convey product needs (Fever usability) and process requirements to HQ and liaise with product/engineering teams to compile and prioritize a comprehensive list of all requirements.You will create and maintain a detailed Q&A resource to address potential user inquiries managed by our support team.

Mar 18, 2026
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Pleo logo
Full-time|On-site|Madrid, London, Lisbon

Managing expenditures can be a complex and cumbersome task, but at Pleo, we're revolutionizing this space. Our innovative spend management solutions empower finance teams and employees to handle their finances effortlessly and effectively. With a mission to help businesses 'go beyond', we strive to simplify the way money is managed.Over the past decade, our mantra 'Pleo'—meaning 'more than you’d expect'—has driven our success and innovation.As we continue to expand our reach to over 40,000 customers, we seek individuals who are passionate about identifying customer needs, simplifying complex challenges, and ambitiously pursuing excellence. Join our diverse team of 850+ exceptional individuals from more than 100 nationalities, all committed to shaping the future of business spending.About the RoleWe are excited to invite a skilled Backend Engineer to our team at Pleo. In this pivotal role, you will contribute to the design and scalability of our backend systems while taking part in exciting projects as we enhance our product and service offerings. If you have a passion for tackling complex technical challenges and desire to work in an environment that values transparency, collaboration, and a strong commitment to innovation, this opportunity is for you.Your ResponsibilitiesAs a Backend Engineer, you will:Design, develop, and maintain scalable microservices primarily using Kotlin.Collaborate with cross-functional teams to create innovative solutions across various domains, including Platform, Services, and SMB.Evaluate system performance and implement optimizations to ensure reliability and scalability.Engage in code reviews, conduct post-mortems, and mentor junior engineers.Proactively manage technical debt and navigate the team through technical challenges and transitions.Your QualificationsTo excel in this role, you should possess:Proven experience in server-side programming languages, particularly Kotlin, alongside expertise in distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes).Strong proficiency with relational databases such as PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana.

Feb 27, 2026
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Destinus Group logo
Full-time|On-site|Madrid, Community of Madrid, Spain

About the RoleStep into a dynamic position central to operations at a pioneering aerospace firm. As a Junior Logistics Coordinator, you'll collaborate with seasoned professionals in a fast-paced environment, taking charge of daily logistics functions while expanding your expertise. From managing shipments to engaging with ERP systems, you will be instrumental in ensuring essential components are transported efficiently across borders, playing a vital role in operations that matter.At Destinus, we are transforming the defense sector with state-of-the-art Unmanned Aerial Vehicles (UAVs). Our advanced technologies are tailored to meet the specific needs of contemporary defense operations, offering unmatched speed, accuracy, and cost-effectiveness. Destinus collaborates with government entities and defense organizations globally to deliver innovative solutions for mission-critical tasks, ushering in a new era of operational efficiency and technological excellence. Join us in redefining the future of defense through revolutionary aerospace advancements.ResponsibilitiesOversee shipping, receiving, and warehousing operations across internal teams and external suppliers to ensure seamless daily activities.Utilize ERP and logistics software for inventory tracking, transport monitoring, and maintaining precise documentation.Manage logistics data entry, reporting, and cost analysis for shipments and materials.Collaborate with cross-functional teams to ensure timely and accurate delivery of aerospace components and materials.Communicate with transportation providers and customs agents to facilitate import and export transactions.Identify bottlenecks or inefficiencies in logistics operations and contribute to initiatives for continuous improvement.Work with Microsoft Dynamics (MSD) to enhance logistics and warehouse coordination.RequirementsQualificationsExcellent organizational and problem-solving abilities with a detail-oriented approach.Experience in logistics, supply chain, or warehouse coordination, either through professional roles or internships.Basic knowledge of ERP systems or logistics management tools, particularly Microsoft Dynamics 365.Strong communication skills with a proactive attitude towards cross-team collaboration.Fluency in English is essential.Who You AreYou are hands-on, eager to learn, and ready to advance in one of today’s most exciting fields. You flourish in dynamic environments, are inquisitive, and enjoy tackling real-world logistics challenges. Your attention to detail and passion for understanding the logistics process will make you an invaluable addition to our expanding team.

Apr 1, 2026
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SGS logo
Full-time|On-site|Madrid

Role overview SGS is looking for a Junior Pavement Inspector to join the team in Madrid. This entry-level position plays a key part in quality assurance for pavement projects, working directly with construction materials and inspection processes. The role centers on practical, on-site work and helps ensure projects meet established standards. What you will do Carry out inspections of pavement projects and related construction materials Verify that work and materials comply with industry standards and specifications Assist the team in maintaining quality at each stage of the project Location This position is located in Madrid.

Apr 28, 2026
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airapps logo
Full-time|On-site|Madrid

Role overview airapps seeks a Junior Social Media Associate based in Madrid. The position centers on building the brand’s online presence and fostering stronger connections with the audience through various social channels. What you will do Collaborate with the marketing team to plan and publish content on several social media platforms Develop posts and campaigns that represent the airapps brand and encourage community engagement Track and analyze performance metrics to identify what content resonates with followers Help grow and engage the online community

Apr 24, 2026
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fiskaly logo
Full-time|On-site|Berlin, Berlin, Germany; Madrid, Madrid, Spain; Milano, Milan, Italy; Vienna, Vienna, Austria

fiskaly is looking for a Staff Backend Engineer with strong Golang experience. This position focuses on designing, building, and maintaining scalable backend services that form the foundation of fiskaly’s products. Collaboration with colleagues from various teams is a key part of the role, with a shared goal of improving system performance and setting technical standards. Locations Berlin, Germany Madrid, Spain Milano, Italy Vienna, Austria What you will do Design, develop, and maintain backend services using Golang Work closely with teams across disciplines to deliver reliable solutions Drive improvements in system performance Help establish and promote technical quality and best practices within the backend team

Apr 22, 2026
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AECOM logo
Full-time|On-site|Madrid

Join our dynamic team at AECOM as a Junior Roadway Engineer. In this role, you will work closely with experienced engineers to design, analyze, and implement roadway projects that enhance infrastructure and transportation efficiency.You will be involved in various phases of project development, from initial design concepts to project completion, ensuring compliance with engineering standards and local regulations. Your contributions will help shape the future of urban mobility and community connectivity.

Jan 22, 2026
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Fever logo
Full-time|On-site|Madrid

Fever is a technology platform focused on making culture and live entertainment more accessible. Based in Madrid, Fever connects audiences with unique experiences and supports event creators with digital tools and data insights. About Fever Fever reaches over 300 million people each month across 55+ countries. The platform partners with organizations such as Netflix, F.C. Barcelona, and Primavera Sound. Backed by global investors, Fever continues to expand its reach and impact in the entertainment industry. Who We Look For Fever values proactive team members who bring a hands-on approach and want to help shape the future of live entertainment. Location This Junior Partner Representative role is based in Madrid.

Apr 17, 2026
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AECOM logo
Full-time|On-site|Madrid

AECOM Buildings + Places is on the lookout for a detail-oriented Junior Project Manager to join our dynamic team in Madrid.In the role of Junior Project Manager, you will become part of a proactive and enthusiastic team, engaging in multidisciplinary projects across various regions for clients in the public sector, institutions, U.S. Government, and defense sectors. This position is an excellent opportunity for someone at the beginning of their project management journey to gain exposure to international projects, collaborate with senior professionals, and experience structured project delivery throughout the entire project life cycle.Your key responsibilities will include assisting senior Project Managers and Project Directors with:Coordinating daily project activities across architecture, engineering, planning, environmental, and specialist teams.Implementing project setup, planning, delivery, reporting, and closeout.Monitoring actions, deadlines, deliverables, risks, changes, invoices, and project documentation.Creating meeting notes, client updates, presentations, progress reports, and internal review materials.Collaborating with subconsultants and vendors.Overseeing scope, schedule, budget, quality, and contractual obligations.Supporting proposal and business development efforts, including RFP reviews, compliance tracking, fee inputs, and deadline management.Utilizing tools such as Deltek GovWin, SAM.gov, client portals, SharePoint, Teams, Excel, PowerPoint, and AECOM's internal systems.Gaining insights into the planning, management, delivery, and closure of international public sector and U.S. Government projects.

May 5, 2026
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jobandtalent logo
Full-time|On-site|Madrid HQ, ES

Join our dynamic team at jobandtalent as a Junior Paralegal in our Madrid headquarters. This entry-level position offers a fantastic opportunity to kickstart your legal career, assisting our legal team in various tasks, including document preparation, research, and administrative support. If you are detail-oriented and eager to learn, we encourage you to apply!

Mar 11, 2026
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AECOM logo
Full-time|On-site|Madrid

Join our dynamic team as a Junior Engineer specializing in Bridges and Structures at AECOM in Madrid. In this role, you will collaborate with experienced professionals to design and analyze structural elements that contribute to vital infrastructure projects.

Jun 30, 2025
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Feverup logo
Full-time|On-site|Madrid

Join Feverup as a Junior Project Manager for the Nordics region, where you'll have the opportunity to support exciting projects and engage with diverse teams. In this dynamic role, you will assist in the planning, execution, and monitoring of projects to ensure success and satisfaction.

Apr 10, 2026
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JetBrains s.r.o. logo
Full-time|Remote|Belgrade, Serbia; Berlin, Germany; Limassol, Cyprus; Madrid, Spain; Munich, Germany; Prague, Czech Republic; Remote, Germany; Warsaw, Poland; Yerevan, Armenia

JetBrains s.r.o. is hiring a Junior Email Marketing Specialist to join the marketing team. This entry-level position centers on supporting email campaigns that connect with a broad audience. The role is open to candidates in several European cities, as well as remote within Germany. Main responsibilities Collaborate with team members to design and send out email campaigns Assist in crafting clear and engaging content for email communications Review campaign performance and recommend ways to improve results Contribute to initiatives aimed at increasing customer engagement through email Available locations Belgrade, Serbia Berlin, Germany Limassol, Cyprus Madrid, Spain Munich, Germany Prague, Czech Republic Remote, Germany Warsaw, Poland Yerevan, Armenia

Apr 28, 2026
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Cabify logo
Full-time|On-site|Madrid

Are you passionate about customer relationship management and eager to kickstart your career? Join us as a Junior CRM Specialist at Cabify!In this role, you will have the opportunity to support our CRM initiatives, analyze customer data, and help enhance our customer engagement strategies. You will collaborate closely with experienced professionals, gaining valuable insights and skills in the CRM domain.

Apr 7, 2026
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Fever logo
Full-time|On-site|Madrid

About Fever Fever is a technology platform focused on culture and live entertainment. The company’s mission is to make culture and entertainment accessible to everyone. Using technology and data, Fever helps people discover and enjoy live experiences in over 55 countries, reaching more than 300 million users each month. Fever partners with major names such as Netflix, F.C. Barcelona, and Primavera Sound, delivering experiences recognized around the world. The company is backed by leading global investors and provides event creators with tools and insights to reach new audiences and develop new formats. Working at Fever The team values proactive people who want to help shape the future of entertainment. Fever continues to grow and welcomes those ready to contribute to its mission. Location Madrid

Apr 15, 2026

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