Ready to start your career with a traineeship job?
theInterna helps you discover top opportunities to gain real-world experience, develop key skills, and grow your professional network.
Whether you’re a student or graduate we provide the resources to help you succeed.
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Want to know more about traineeship jobs?
Whether you’re wondering how traineeships work, if they’re paid, or what opportunities are available, we’ve got you covered.
These programs combine hands-on training with learning, helping you build confidence and practical knowledge in your chosen field.
Explore everything you need to know about traineeship jobs!
This YC-backed startup is modernising global e-invoicing compliance with a developer-first API that generates and submits compliant invoices worldwide. They’re seeking a recent graduate in Madrid to join their engineering team as a Back-End Developer, contributing to the core systems that power their platform and working alongside experienced engineers to solve complex real-world problems at scale.
This Y Combinator-backed fintech startup simplifies global e-invoicing compliance through an API that converts sales data into locally compliant invoices. They’re seeking a proactive Business Development Associate in Madrid to help drive growth, manage client relationships, and contribute to expanding their international reach.
As a Business Growth & Sales Intern, you’ll play a direct role in our growth journey, gaining hands-on experience in business development, sales strategy, and marketing. You’ll collaborate closely with our founders and team to identify, nurture, and convert new business opportunities, making meaningful contributions to our strategic sales initiatives.
This internship offers a unique opportunity for candidates to gain hands-on experience in sales and account management. The intern will work directly with a growing sales team, contributing to lead generation, account management, and podcast-driven growth strategies. This is a chance to shape the future of the sales process, learn from industry experts, and play an active role in a variety of sales and marketing activities.
Number 16 School is a top English academy in Spain offering paid teaching internships in Zaragoza. Interns teach and support children aged 1–12 in a dynamic, international environment with full training provided. The role includes 20–34 hours per week, €850–€1,450/month, and opportunities for professional growth.
This fast-growing YC-backed startup is building modern infrastructure to simplify global e-invoicing compliance. Their developer-first API helps businesses automatically generate and submit compliant invoices across multiple countries, reducing complexity and enabling seamless international operations. With a team of experienced engineers and startup operators, they’re focused on solving real-world problems at scale.
As a Graduate Back-End developer, you’ll work on the core systems that power a highly technical, API-first product. You’ll be writing clean, scalable code, contributing to architecture decisions, and working closely with the founding engineering team.
This role is ideal for someone early in their career who wants to learn fast, write meaningful code from day one, and be surrounded by a collaborative and high-calibre team in Madrid. You should be excited about building elegant solutions to messy compliance challenges and about living and growing in a vibrant European tech hub.
Design, build, and maintain backend systems and microservices
Collaborate on API development and contribute to overall product architecture
Write clean, well-tested code and participate in code reviews
Assist with scaling and performance optimisation as the platform grows
Work closely with front-end and product teams to align on technical needs
Stay up to date with backend best practices and emerging technologies
A recent graduate or early-career engineer with a degree in Computer Science or similar
Experience with modern back-end technologies
Familiar with APIs, system design, and cloud infrastructure (e.g. Docker, AWS)
A clear communicator who enjoys working in a team
Detail-oriented, eager to learn, and excited to grow fast
English Native
Excited to live and work in Madrid with a collaborative, ambitious team
Location: Madrid
Type: Full-time
Salary: Up to 1000 euros a month
Traineeship jobs are structured programs that combine learning and practical experience, helping you gain the skills needed to enter the workforce.
Students tend to (but not always) gain credits as they do the internship.
Traineeship jobs are the stepping stone to a successful career. Here’s why they’re invaluable:
At theInterna, we specialize in connecting you to traineeship jobs that align with your skills and aspirations.
Applying for traineeship jobs is simple:
With these steps, you’re set to start your traineeship journey confidently.
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Some traineeship jobs offer stipends or salaries, while others are unpaid. On theInterna you can whether the internship is paid or not before you apply.
Absolutely! We encourage you to apply for about 5 opportunities initially which really align to your interests. It is better to have fewer but more tailored applications
Not necessarily. Many traineeship jobs are designed for beginners and focus on skill development but make sure to really demonstrate (quantitatively where possible) your skills and achievements in your CV.
Traineeship jobs come in many forms—tech, marketing, sales, customer support, engineering, and more. Some focus on creative skills, others on business or data. You can filter by field or interest when browsing listings on theInterna.
It depends on the employer. Some roles require local language skills (like Spanish or French), while others only ask for fluent English. Each listing will mention language requirements clearly, so check before applying.
Yes, you can. theInterna typically works with students in their final year or those who graduated recently. If you’ve recently completed your degree and are looking to gain hands-on experience, a traineeship is a great next step.
Yes, especially in marketing, software, and customer experience roles. Many companies now offer remote traineeships or hybrid models, allowing flexibility if you can’t relocate.
Traineeships are often structured with training modules and soft skills development, while internships tend to focus more on workplace immersion. Traineeships may also lead to qualifications or support services.
Many traineeship jobs serve as a stepping stone to a permanent role. Some companies hire top-performing trainees or extend their contracts if there’s a good fit.
Typically, you’ll need an updated CV, a short motivation letter, and any relevant academic or work references. Some roles may ask for a portfolio or language proof.
Yes, if you’re working in a country where you’re not a resident. Visa types vary by country and job duration. theInterna provides guidance or links to help with the visa process.
Most traineeships range from 20 to 40 hours per week. Full-time roles are common, but some employers offer part-time schedules, especially for students or remote placements.
By interning at a partner startup of theInterna you will be sure to get real business exposure and give you the right grounds to be able to excel when there.
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