Full Stack Developer Intern

Full-Stack Developer Internship (3 - 6 months, unpaid)

Location: Stockholm or Remote

Start: Rolling applications

Tendoer is building an AI-powered platform that helps suppliers respond to public tenders more efficiently and collaboratively. We're already working with real users and preparing to scale. To support our next phase, we're looking for driven full-stack engineering interns to join our team.

We welcome devs who are looking for a 3 to 6 months internship in software development. You will be involved in everything from new feature development, bug solving and releasing new versions to our production environment. You will also interact with our UX team and lead engineer. This will enable you to understand everything which goes into building our saas solution.

You will also be involved in requirement gathering and interact with our customers when it comes to enhancements and bug-fixing. This is a 3-month unpaid internship to start, with the opportunity to take on real responsibility and contribute directly to the product.

What you’ll do

• Develop and ship new features using our modern tech stack: Next.js, Tailwind CSS, Convex, Clerk, and Vercel
• Work across the full stack, from database and backend logic to frontend UI
• Collaborate with the founding team on product direction and user experience
• Gain experience with AI-assisted workflows and real customer use cases

What we’re looking for

• A curious and self-driven developer who wants to learn fast by building real things
• Comfortable working with JavaScript/TypeScript and modern web development tools
• Interested in SaaS, startups, and the intersection of AI and workflow automation
• Available to commit part-time (<50%) or full-time for at least 3 months, starting in August.

What we offer

Being part of a very early stage start-up where we expect you to be independent, creative, free thinking. We are two co-founders with a strong skillset combination, with respective deep experience in tenders and software development. This role is based in Stockholm or open to working remotely.

• You’ll work directly with the founders in a fast-moving startup environment
• You’ll ship real features that make it into production and help real users
• You’ll gain valuable experience, mentorship, and a strong portfolio of work