Fullstack Developer Intern

Engineering Internship – Gothenburg / Stockholm Location: Gothenburg / Stockholm | Seniority: Junior / Mid-Level | Employment type: Internship (Full-time) | Compensation: No Compensation About This Role Are you looking for a full-time internship (4-6 months) where you'll actually build real stuff, learn a ton, and have fun doing it? At Sid, we're transforming how B2B SaaS companies reach decision-makers through ultra-targeted advertising, and we're looking for a full-stack intern to help us level up our internal tools and platform. If you're curious, eager to code, and want to be part of a fast-moving, collaborative team—this one's for you. About the Role As a Fullstack Intern, you'll collaborate directly with the product and tech team to deliver internal tools and features that impact our day-to-day operations and client campaigns. You'll work on building user interfaces, developing APIs, and designing backend logic in a real production environment from day one. This role isn't just about writing code—you'll also act like a product engineer, thinking critically about what we build and why. What You'll Do Build Frontends: Design and develop functional and beautiful UIs using modern frontend frameworks. Develop Backends: Create clean, scalable APIs and server-side logic to support new tools and services. Integrate Systems: Connect third-party platforms, marketing tools, and databases to streamline operations. Improve UX: Continuously iterate on product design based on internal feedback and real usage. Ship Code: Contribute to real sprints with support from senior developers, product managers, and users. About You You don't need 5 years of experience. We're looking for someone smart, curious, and ready to learn. You're probably studying computer science, design, or a related field (or you're self-taught and love building stuff). Built or contributed to full-stack projects on your own or in school. Understanding how APIs and databases work together in modern web apps. A concern for building usable, well-structured, clean code—not just getting it to work. Enjoy working in a tight-knit, collaborative team with quick feedback loops. Looking for a full-time internship where you'll do meaningful work that ships. Nice-to-Haves Experience with tools like Next.js, React, TypeScript, Node.js, or similar. Understanding of Git, CI/CD, and collaborative development practices. Familiarity with databases (SQL or NoSQL), ORMs, and auth workflows. Interest in UI/UX, system design, or performance optimization. What We Offer You Hands-On Learning: Work with modern tools and frameworks in a real production environment. Mentorship & Feedback: Learn directly from a CTO who has scaled a startup to acquisition by Mastercard and knows what it takes to build resilient, large-scale systems. Ownership: Your work will ship. Your decisions will matter. Startup Energy: Fast-moving, high-learning environment where you'll never be bored. Hybrid Flexibility: We're remote-first but love co-working when it makes sense. About Sid Founded in 2024, Hey Sid is a next-generation, person-targeted advertising platform that helps B2B companies reach decision-makers with precision. We bring together audience identification, creativity, and campaign management into one streamlined flow, ensuring that every ad dollar reaches the right person. As a young and fast-growing company, we're building an ambitious team that values ownership, creativity, and results. Joining us means the opportunity to have a real impact on both the business and your career growth. J-18808-Ljbffr