Senior/Middle Software Engineer

1 week ago

Belgrade, Central Serbia Constructor TECH Full time €40,000 - €80,000 per year

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.

Our headquarters is located in Switzerland, and we also have legal entities in Germany, Bulgaria, Serbia, and Singapore

Please send your resume in English only.

DUTIES & RESPONSIBILITIES: 

  • Design, develop, and maintain integrations for the Constructor Platform. 
  • Participate in code reviews and provide feedback to peers. 
  • Write robust, maintainable, and well-tested code. 
  • Consult and support 3rd-party developers integrating with the Constructor Platform. 

QUALIFICATION & EXPERIENCE: 

  • 5+ years of professional backend development experience. 
  • Knowledge of FastAPI (or similar modern frameworks) and asynchronous programming in Python. 
  • Solid understanding of programming principles (e.g., SOLID, dependency injection, clean architecture). 
  • Understanding of microservices and communication patterns (sync/async, event-driven). 
  • Familiarity with CI/CD pipelines. 
  • Problem-solving skills and autonomy. 
  • Fluent in spoken and written English. 
  • Excellent communication skills. 

Nice-to-Have: 

  • Experience in C# and PHP. 
  • Basic front-end skills.  
  • Experience integrating with LLM APIs (OpenAI, Anthropic). 
  • Familiarity with LangChain / LangGraph and RAG architectures. 
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):
    • Sofia: 59 G. M. Dimitrov Blvd., NV Tower, 8th floor, 1700
    • Belgrade: Makedonska 12, 11000 Belgrade, Serbia

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.

  • Senior Software Engineer

    20 hours ago

    Belgrade, Central Serbia Microsoft Full time €90,000 - €120,000 per year

    Microsoft's Applied Sciences Group is at the forefront of developing groundbreaking technologies for our next-generation hardware and software products. We lead innovations in Artificial Intelligence / Machine Learning, Large Language Models and Computer Vision. Our focus is to envision, plan, and deliver the next generation of cutting-edge AI algorithms...

  • Senior Software Engineer

    1 week ago

    Belgrade, Central Serbia Altium® Full time €90,000 - €120,000 per year

    Why Altium?Altium is transforming the way electronics are designed and built. From startups to world's technology giants, our digital platforms give more power to PCB designers, supply chain, and manufacturing, letting them collaborate as never before.Constant innovation has created a transformative technology, unique in its spaceMore than 30,000 companies...

  • Senior Software Engineer

    2 weeks ago

    Belgrade, Central Serbia Easy Aerial Inc. Full time €40,000 - €80,000 per year

    Company Overview:Easy Aerial is a fast-growing startup building autonomous drone solutions for defense and commercial use. We're seeking a Senior Software Engineer to develop full-stack software for drone control and locally deployed applications. This role is hands-on, highly technical, and central to integrating new payloads and expanding our product...

  • Senior Software Engineer

    1 week ago

    Belgrade, Central Serbia Microsoft Full time €30,000 - €60,000 per year

    We are Azure Databases, a Microsoft team that drives the future of databases in the Microsoft Cloud. Our software development teams, located in Belgrade, are building some of the most advanced and widely used database cloud services in the world. The services we build are based on groundbreaking technology and are global market leaders, with millions of...

  • Senior Software Engineer

    1 week ago

    Belgrade, Central Serbia LearnUpon Full time €60,000 - €120,000 per year

    LearnUpon is looking for a Senior Software Engineer to join our team in Belgrade. This is a flex role, working 1 day per week from LearnUpon's Belgrade office.LearnUpon LMS helps organizations train their employees, partners, and customers. Businesses can manage, track, and achieve their unique learning goals — all through a single, powerful solution.With...

  • Senior Software Engineer

    1 week ago

    Belgrade, Central Serbia LearnUpon Full time €60,000 - €120,000 per year

    LearnUpon is looking for a Senior Software Engineer to join our team in Belgrade. This is a flex role, working 1 day per week from LearnUpon's Belgrade office.LearnUpon LMS helps organizations train their employees, partners, and customers. Businesses can manage, track, and achieve their unique learning goals — all through a single, powerful solution.With...

  • Senior Software Engineer

    1 week ago

    Belgrade, Central Serbia Greencastle Digital Full time €60,000 - €120,000 per year

    Job Title:Senior Software Engineer - ReactLocation:New BelgradeWork Pattern:Hybrid / RemoteReports to:Technical LeadAbout Greencastle DigitalGreencastle Digital has launched a new Development Centre in Belgrade, which opened in January 2025. We are a forward-thinking company operating within the dynamic betting and gaming industry. Our mission is to bring...

  • Senior Software Engineer

    3 days ago

    Belgrade, Central Serbia Paymentology Full time €40,000 - €80,000 per year

    At Paymentology, we're redefining what's possible in the payments space. As the first truly global issuer-processor, we give banks and fintechs the technology and talent to launch and manage Mastercard, Visa cards at scale — across more than 60 countries.Our advanced, multi-cloud platform delivers real-time data, unmatched scalability, and the flexibility...

  • Senior Software Engineer

    20 hours ago

    Belgrade, Central Serbia Microsoft Full time €30,000 - €60,000 per year

    Microsoft's Applied Sciences Group is at the forefront of developing groundbreaking technologies for our next-generation hardware and software products. We lead innovations in Artificial Intelligence / Machine Learning, Large Language Models and Computer Vision. Our focus is to envision, plan, and deliver the next generation of cutting-edge AI algorithms...

  • Senior Software Engineer

    20 hours ago

    Belgrade, Central Serbia Bonapolia Full time €40,000 - €80,000 per year

    We are looking for aSenior Software Engineer (Angular) who iswilling to dive into the project with a modern stack. If you're driven by a curiosity to learn and a desire to produce meaningful results, please applyAbout The ClientOur client is one of the Big Four accounting firms and the world's largest professional services network. Headquartered in London,...