Top 10 Tech Startups Hiring Junior Developers in Spain in 2026
By Irene Holden
Last Updated: April 13th 2026
Too Long; Didn't Read
Biorce and Multiverse Computing stand out as top choices for junior developers in Spain in 2026, with Biorce's €8.5M funding focusing on clinical AI and Multiverse Computing's €189M Series B in quantum-inspired AI offering high-impact roles. These startups in hubs like Barcelona and Madrid provide accelerated learning and career growth within Spain's thriving tech ecosystem of over 8,500 active companies.
You’re in the cellar of a centuries-old bodega in La Rioja, faced with a hundred nearly identical bottles. Your future self is in one of them. The flashy, modern label promises instant gratification, but the understated, dusty bottle whispers of deeper potential and complex aging. Choosing your first tech startup in Spain’s booming ecosystem is strikingly similar.
With over 8,580 active tech companies in 2025, a 22% year-over-year increase creating a paradox of choice, the true value for a junior developer lies not in the most hyped name but in the "terroir" - the unique blend of culture, mentorship, and growth trajectory that will allow your career to mature into an exceptional vintage. This boom is exemplified by startups featured in analyses of Spain's rising tech scene.
Experts note the landscape favors the "AI-Augmented Junior" who can pilot agentic workflows from day one, suggesting that beyond the tech stack, the environment's capacity to accelerate your learning is paramount. This list is curated with that in mind. We’ve selected startups not merely ranked by funding but chosen as fertile grounds where junior talent can take root, gaining meaningful ownership and a front-row seat to business decisions.
For those wanting to define their palate early, the experience in the right vineyard - be it in Madrid, Barcelona, or Valencia - can be unparalleled. Let's explore the cellars.
Table of Contents
- Beyond the Flashy Label: An Introduction
- Orbio
- 360Learning
- REVER
- Zynap
- THEKER Robotics
- Factorial
- HappyRobot
- Murphy AI
- Multiverse Computing
- Biorce
- How to Find Your Vineyard in Spain
- Evaluating Startup Stability and Fit in Spain
- Frequently Asked Questions
Get an overview of the AI job market in Spain from this guide.
Orbio
The Terroir: Human-Centric AI for HR
Fresh from a $7.6M Seed/Series A round, Orbio is building AI systems designed to automate and humanize HR workflows. Based in Valencia with a presence in Madrid, it represents the growing strength of Spain’s secondary tech hubs, which are becoming increasingly attractive for tech talent.
For a junior developer, this translates to immediate impact on tools that directly shape employee experience at other companies. The company's focus on workflow automation means junior Frontend and Backend Engineers are tasked with solving tangible business problems from day one, using a modern web stack.
Why It's a Prime Vintage for Juniors
Orbio has been listed among Spain’s top 10 most promising startups for 2026, indicating strong investor confidence and growth potential. Working here offers a blend of product development and applied AI within the massive HR tech sector, providing a stable yet innovative domain to cut your teeth.
Tech Stack & Junior Roles
Expect to work with TypeScript, Next.js, and cloud services. Typical entry points are Junior Frontend and Backend Engineer roles focused on building and scaling the company's core automation platform, offering a clear path to develop a highly relevant, in-demand skill set.
360Learning
The Terroir: Collaborative Ed-Tech at Scale
As a Series B+ company with a strong remote-first culture, 360Learning offers a unique proposition: the mentorship and structure of a scaling company with the flexibility of remote work across Spain. The company focuses on collaborative learning platforms infused with Generative AI, positioning it at the intersection of education and cutting-edge technology.
Why It's a Prime Vintage for Juniors
360Learning frequently posts roles like Junior Software Engineer - Mobile (Android), offering end-to-end ownership of specific learning features under the guidance of senior mentors. Their established remote culture means proven processes for integrating and developing distributed talent, a key advantage in Spain's growing remote job market.
This is an ideal environment for juniors who value clear career progression within a high-growth sector and want to build expertise in mobile or full-stack development within a product that has global reach, as seen on platforms like Built In Spain.
Tech Stack & Junior Roles
The primary technologies include Kotlin, Swift, and React. Actively hiring for junior mobile engineers, the company provides a structured path to gain deep experience in either Android or iOS ecosystems while contributing to a platform revolutionizing how organizations learn.
REVER
The Terroir: Revolutionizing E-Commerce Returns
A Y Combinator S22 alumnus with recent Seed/Series A funding, REVER is tackling the complex world of e-commerce returns. Based in Barcelona, this startup epitomizes the city’s product-first, agile tech culture, a hub where, as noted in a review of 20 Spanish startups to watch, such early-stage companies often provide rapid skill development.
Why It's a Prime Vintage for Juniors
REVER has been visibly active in hiring, with LinkedIn postings for Junior Software Engineers noting salary ranges between €30k - €70k, reflecting the premium for strong product sense and technical fit. This aligns with broader opportunities in Barcelona's robust junior job market.
Juniors here gain full-stack exposure to cloud infrastructure and critical third-party platform integrations, building a highly transferable e-commerce skill set from the ground up in a fast-paced, logistics-focused environment.
Tech Stack & Junior Roles
The core stack revolves around JavaScript/TypeScript with React and Node.js, deployed on major cloud providers. Roles center on full-stack development for their returns management platform, offering a comprehensive introduction to modern web development and scalable system design.
Zynap
The Terroir: Cybersecurity Powered by Agentic AI
Cybersecurity remains a critical growth sector, and Zynap is a rising star in Barcelona’s deep-tech scene. After raising €11.7 million, they are building automated, Agentic AI platforms for security ecosystems, placing them at the absolute forefront of a technical domain with immense demand, as highlighted in coverage of Spain's most promising startups.
Why It's a Prime Vintage for Juniors
Joining a cybersecurity startup at this stage offers unparalleled access to cutting-edge problems in AI and automation. Juniors won’t be siloed; they’ll contribute to systems that proactively detect and respond to threats. The sector's well-documented talent shortage also means faster career advancement for those who prove capable.
As part of the broader expansion of AI and cybersecurity in Barcelona's tech hub, Zynap represents a high-upside, high-learning-curve opportunity for developers interested in low-level systems, AI models, and large-scale data processing.
Tech Stack & Junior Roles
The tech environment likely involves Python, Go, Rust, and modern AI/ML frameworks. Roles include Junior Security Automation Engineer and Junior Machine Learning Engineer, offering a direct path to becoming a specialist in one of tech's most vital and fast-evolving fields.
THEKER Robotics
The Terroir: AI-Powered Industrial Automation
THEKER Robotics made headlines for closing the largest seed round in Spanish history at €21M. This substantial war chest is dedicated to bringing AI-powered automation to industrial settings, positioning the company as a key player in the sector's expansion, as noted in analyses of Spain's 2026 tech hiring landscape.
For a junior engineer, it’s a ticket to working on tangible, complex robotics and software systems that interact with the physical world. The scale of funding indicates massive investor confidence and a long runway, providing relative stability uncommon in early-stage startups.
Why It's a Prime Vintage for Juniors
Juniors will be immersed in a multidisciplinary environment combining computer vision, real-time systems, and AI. This holistic exposure to the full product stack - from algorithm to actuator - is rare and invaluable for building a foundational career in robotics. The company is actively seeking engineering talent, making it a prime time to join and grow with the team during its scaling phase.
As identified among the 20 Spanish startups to watch in 2026, such ventures offer accelerated responsibility, allowing new developers to contribute to core technology from the outset rather than maintaining legacy systems.
Tech Stack & Junior Roles
The technical foundation includes C++, Python, ROS (Robot Operating System), computer vision libraries like OpenCV, and AI/ML toolkits. Junior roles span software, perception, and automation engineering, offering a direct path to specialize in the rapidly growing field of intelligent robotics within Spain's industrial sector.
Factorial
The Terroir: Scaling a Homegrown HR Unicorn
While more established than others on this list, Factorial remains a "dominant force in the Spanish startup scene" and a continuous hirer of technical talent. Having scaled significantly within Spain's ecosystem of over 8,580 active tech companies, it now offers a hybrid environment: the energy of a startup with more mature processes, ideal for juniors who want structure alongside impact.
For a junior developer, Factorial offers the chance to learn engineering best practices at scale. You’ll work on a product used by thousands of companies, dealing with challenges of performance, security, and scalability that are critical in a sector that generated 108,000 direct tech jobs in 2025. Their continuous growth, as part of the vibrant scene highlighted by EU-Startups, means ongoing opportunities across teams.
Tech Stack & Junior Roles
The tech stack is broad, likely including Ruby on Rails, React, and cloud-native technologies. They consistently hire for junior full-stack and backend developer positions, providing a career-launching pad that combines the kudos of a major Spanish tech success story with the practical experience of building a complex, global SaaS platform, with roles often listed on platforms like Built In Spain.
HappyRobot
The Terroir: Rapid-Scale AI Implementation
Backed by top-tier VC Andreessen Horowitz (a16z), HappyRobot has executed a blistering growth trajectory, scaling from 0 to 130 employees rapidly. They specialize in deploying AI solutions, recently expanding via a partnership with DHL, a testament to their enterprise focus and execution speed within Spain's high-growth climate, as analyzed in reports on scaling Spanish startups.
Why It's a Prime Vintage for Juniors
This environment is a pressure cooker for learning. Juniors, such as their tri-lingual Forward Deployed Engineers, are thrust into client-facing roles, implementing solutions and solving real-world business problems immediately. The explosive growth ensures constant new challenges and opportunities for responsibility, suited for resilient, adaptable graduates who want to see the direct business impact of their code.
As highlighted among the 20 Spanish startups to watch in 2026, this pace provides an unparalleled crash course in how AI technology is sold, integrated, and scaled for major corporations, building a rare blend of technical and commercial acumen early in one's career.
Tech Stack & Junior Roles
The core technology revolves around Python, cloud services (AWS/Azure), and various AI/ML frameworks. Roles often uniquely blend software engineering with solution architecture and client consultation, offering a broader view of the tech value chain than a purely internal development role.
Murphy AI
The Terroir: Autonomous Agents Replacing Call Centers
With $15M in Series A/B funding, Madrid-based Murphy AI is at the heart of the "Agentic AI" wave, building multilingual AI agents to automate customer interactions across SMS, WhatsApp, and phone. It's a fast-paced, ambitious mission centered on one of AI's most applied use cases, leveraging Madrid's position as a capital flush with telecom and enterprise clients.
Frequently cited as a "startup to watch in 2026", Murphy AI offers juniors a front-row seat to building and scaling autonomous systems. This aligns with the industry trend where, as experts note, juniors who can pilot AI agentic workflows have a distinct hiring advantage.
Why It's a Prime Vintage for Juniors
Junior Software Engineers are tasked with deploying and monitoring live AI agents, offering a rare, practical blend of software engineering, DevOps, and applied AI from the start. The Madrid location provides a strong business network and a clear path to impacting a massive global industry, with roles that often command a salary premium in Spain's tech market.
As analyzed in the Learning VC review of Spanish startups, joining a company at this intersection of cutting-edge technology and immediate business application accelerates professional development far beyond theoretical learning.
Tech Stack & Junior Roles
The technical environment focuses on Python, Node.js, autonomous agent frameworks like LangChain or CrewAI, and cloud infrastructure. Roles are centered on building, integrating, and maintaining AI agent workflows, providing foundational experience in the tools and architectures defining the next generation of customer service and enterprise automation.
Multiverse Computing
The Terroir: Quantum-Inspired AI at Scale
A true deep-tech leader, Multiverse Computing secured a massive €189M Series B round. Their expansion is staggering, having recently hired over 90 people in Barcelona alone, pushing its hub past 100 employees as part of a significant expansion effort detailed in coverage of Spain's tech sector. They apply quantum-inspired algorithms to solve complex computational problems in finance, energy, and manufacturing.
Why It's a Prime Vintage for Juniors
This level of funded growth creates a unique window: the stability and resources of a large tech company with the innovative spirit of a frontier-tech startup. Their hiring spree for roles from ML Engineers to AI Researchers includes structured junior hiring, as noted in reviews of Spain's rising tech scene.
You’ll work alongside PhDs on frontier technology with real enterprise clients, building an exceptional and highly specialized profile. The Barcelona hub connects you to one of Europe's most dynamic AI research communities, offering a career path defined by solving some of the world's most complex computational challenges.
Tech Stack & Junior Roles
The technical foundation involves Python, advanced ML frameworks like PyTorch and TensorFlow, quantum computing SDKs, and high-performance computing. Roles include Junior Machine Learning Engineer and Junior Quantum Software Developer, offering a direct entry point into a niche, high-value field with immense long-term potential.
Biorce
The Terroir: High-Impact Clinical AI
Topping our list is Biorce, a MedTech startup that recently raised €8.5M to build a clinical AI assistant designed to accelerate drug trials. Operating in Barcelona and Madrid, it represents the pinnacle of mission-driven, high-stakes tech where code directly impacts human health, a focus that earned it a spot among the most promising startups driving change in 2026.
Why It's a Prime Vintage for Juniors
Biorce offers the ultimate combination of purpose, technical challenge, and career capital. Its work integrating diverse medical datasets into a "linked knowledge graph" is at the cutting edge of AI and life sciences. For a Junior Machine Learning or Backend Engineer, this means tackling critical problems of data privacy, model interpretability, and system reliability from the outset.
The learning curve is steep, but the experience builds a formidable specialization in one of the most regulated and meaningful fields for applied AI. As highlighted in the Learning VC analysis of startups to watch, it’s the dusty bottle with the profound vintage - less flashy than consumer tech, but with depth and impact that will define a career.
Tech Stack & Junior Roles
The technology stack involves Python, TypeScript, specialized medical data protocols, and graph databases. Roles center on building and optimizing the data pipelines and AI models that form the core of their clinical platform, offering a rare entry point into the high-growth intersection of healthcare and artificial intelligence.
How to Find Your Vineyard in Spain
Specialized Platforms & Accelerator Portfolios
Finding these opportunities requires moving beyond generic job boards. Start by using platforms like Wellfound (AngelList) for Spain and local startup job boards (StartupJobs, Domestika Jobs), filtering for "Junior" roles. These niche sites list opportunities at high-growth companies often missed on larger platforms.
Follow the Money & Network Intelligently
Track local accelerator and VC portfolios strategically. Companies backed by Lanzadera in Valencia, Wayra (Telefónica), Barcelona Activa, or Plug and Play Spain often have structured support and active hiring needs. Check their public "portfolio" pages for the latest ventures.
Complement this with intelligent networking. Attend tech meetups in Madrid (MadridJS, Python Madrid) and Barcelona (Barcelona Code Craft, AI Nights). Follow founders and engineers at target companies on social media - they often post about openings before traditional job listings go live.
Leverage Institutional Resources
Finally, tap into the strong ties between academia and industry. University career offices at institutions like Universidad Politécnica de Madrid (UPM), Universitat de Barcelona (UB), or Universitat Politécnica de Catalunya (UPC) frequently have direct pipelines and exclusive job postings from local startups eager to recruit emerging talent.
Evaluating Startup Stability and Fit in Spain
Assess Like a Sommelier
When you find a promising startup, evaluate its "terroir" with a discerning eye. First, examine runway & revenue: ask about cash runway (18+ months is healthy post-funding) and revenue model (recurring SaaS contracts offer more stability than one-off projects). Spanish startups raised €1.95B in H1 2025, so understanding how a company fits into this funding landscape is key.
Key Evaluation Criteria
- Investor Quality: A strong syndicate of known VCs (like K Fund, Sabadell Venture Capital) or international funds provides not just cash but credibility and a vital network for scaling, often into LatAm or Europe.
- Growth Signals: Are they hiring consistently across departments? Expansion into new markets is a common and positive growth path for Spanish startups.
- Cultural Fit: Does their described pace, autonomy, and collaboration match your working style? Spanish startup cultures can vary dramatically from formal to highly informal.
Understand Compensation & Contracts
A typical Spanish startup package for a junior in 2026 includes a base salary (€28k-€38k for technical roles in Madrid/Barcelona, with AI roles commanding higher premiums), plus equity (stock options with a typical 4-year vesting schedule). Benefits often include private health insurance, meal vouchers ("ticket restaurante"), and flexible remote policy. The probation period ("periodo de prueba") is legally capped at 6 months for indefinite contracts.
Red Flags Specific to Spain
- Permanent "Freelance" Status: Being hired as an "autónomo" for a full-time, exclusive role is often a tactic to avoid social security costs and deny employee rights.
- Opaque Equity: Equity should be clearly explained in writing. Be wary of vague promises and understand the vesting schedule and leaver terms.
- Unclear Contract Terms: Your "contrato indefinido" must clearly state salary, role, and benefits. Ambiguity is a major warning sign.
Your first startup role is about finding the right environment to ferment your skills. Choose the vineyard - the unique blend of stability, growth, and culture - not just the bottle, to develop a career with complexity and value that is distinctly your own.
Frequently Asked Questions
How were the top 10 startups selected for this list?
We focused on startups with strong 'terroir' - meaningful mentorship, growth potential, and impact for juniors, not just funding. For instance, Biorce was chosen for its clinical AI mission with €8.5M in funding, emphasizing depth over hype.
What salary can I expect as a junior developer at a Spanish startup in 2026?
In tech hubs like Madrid and Barcelona, base salaries typically range from €28k to €38k, with AI roles often higher. For example, REVER lists junior engineer salaries between €30k and €70k, reflecting demand for technical skills.
Which cities in Spain have the most startup opportunities for juniors?
Madrid and Barcelona are prime hubs with access to EU markets and major employers like Telefónica. Secondary hubs like Valencia, home to Orbio, are also growing, offering diverse roles across Spain's booming ecosystem.
What's the best way to find and apply for these startup jobs?
Use specialized platforms like Wellfound and local job boards, and network at meetups in Madrid or Barcelona. University career offices at UPM or UPC often have strong ties to local startups for recent graduates.
Which startups on the list are best for someone interested in AI careers?
AI-focused startups include Murphy AI in Madrid for autonomous agents and Multiverse Computing in Barcelona with its €189M Series B. These offer hands-on experience in applied AI, aligning with Spain's growing tech demand.
Explore Spain's cybersecurity hiring landscape for 2026 with insights on key sectors and roles.
A listicle on the top 10 AI-hiring industries in Spain.
This resource maps out the highest total compensation packages in Spanish tech for 2026.
Plan your move with our list of top tech coworking spaces in Spain for 2026 to accelerate growth.
For a comprehensive guide to AI engineering jobs in Madrid and Barcelona, check this detailed resource.
Irene Holden
Operations Manager
Former Microsoft Education and Learning Futures Group team member, Irene now oversees instructors at Nucamp while writing about everything tech - from careers to coding bootcamps.