Software Engineer (Intern, C#)

Our mission Constructor’s mission is to enable all educational organisations to provide high-quality digital education to 10x people with 10x efficiency. With strong expertise in machine intelligence and data science, Constructor’s all-in-one platform for education and research addresses today’s pressing educational challenges: access inequality, tech clutter, and low engagement of students. Please send your resume in English only. Interns are NOT eligible for equipment and other benefits as the position is temporary. About the Role We’re seeking a motivated Computer Science student to join our backend engineering team as a C# Backend Developer Intern . This is an excellent opportunity to learn backend development while working on real-world educational platforms that support learners, educators, and institutions worldwide. Interns are NOT eligible for equipment and other benefits as the position is temporary. What You’ll Learn & Do: • Learn backend development using C# and .NET • Contribute to real backend services used in production • Assist in developing and maintaining REST APIs • Work with databases and learn how data is modelled and accessed • Participate in code reviews and learn clean coding best practices • Collaborate with frontend, QA, and product teams • Contribute to backend services supporting learning platform functionality and various integrations • Gain exposure to the full software development lifecycle Required Qualifications: • Current Computer Science / Software Engineering student • Experience with at least one programming language (C#, Java, Python, JavaScript, C++, or similar) • Basic understanding of object-oriented programming concepts • Interest in backend development and distributed systems • Good problem-solving skills and attention to detail • Ability to work collaboratively in a team environment • Eagerness to learn and grow as a software engineer Good to Have (but not required): • Basic knowledge of C# and .NET • Familiarity with RESTful APIs • Introductory understanding of databases ( SQL or NoSQL) • Experience using Git or other version control systems • Basic knowledge of HTTP, JSON, and web concepts • Interest in educational technology (EdTech) What We’ll Teach You: • C# and modern .NET backend development • Designing and implementing REST APIs • Working with databases and data access layers • Clean code and basic backend architecture principles • Debugging, testing, and performance basics • Collaboration in an Agile engineering environment • How production backend systems are built and maintained Technology Stack You’ll Work With: • Programming: C#, .NET 9.0 • Backend: ASP.NET Core • Messaging & Events: Apache Kafka • Databases: PostgreSQL • Tools: Git, CI/CD pipelines, logging & monitoring tools • Testing: Unit and integration testing Learning Opportunities: • Mentorship from experienced backend developers • Exposure to scalable backend architectures • Hands-on experience with real production systems • Understanding how backend services support large platforms • Contribution to products used by students and educators globally What We Offer For Interns: • Internship Duration: from 2 months or more • Type of internship: • 100% remote • or hybrid in the office in Bremen (GER), Sofia (BG), Belgrade (SRB), Istanbul (TR), Sakarya (TR), Singapore (SGD) What We Offer • 💻 Choice of work equipment (e.g., laptop, monitor, etc.) • 🇬🇧 English classes (iTalki – $130 monthly) • ⏰ Flexible schedule (we usually work between 09:00/10:00 and 18:00/19:00) • 👶 Newborn bonus (€500 per child) • 🧠 Patent remuneration • 🌴 Paid leave • 🧑‍💻 Remote work in locations without our offices • Hybrid work in locations with offices (2 days in-office, 3 da