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 CET or EET)
👶 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 days remote)
Constructor fosters equal opportunity for people of all backgrounds and identities. We are led by a gender-balanced board committed to building a diverse and inclusive organisation where everyone can become their best self. We do not discriminate based on age, disability, gender identity, sexual orientation, ethnicity, race, religion or belief, parental and family status, or other protected characteristics. We welcome applications from women, men and non-binary candidates of all ethnicities and socio-economic backgrounds. We encourage people belonging to underrepresented groups to apply.