Senior .NET Developer

Posted 8 Days Ago
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Bucharest, București, ROU
Hybrid
Senior level
Information Technology • Consulting
The Role
Design, develop, and maintain enterprise .NET applications using C#/.NET 8+. Implement APIs, distributed/asynchronous systems (message brokers, queues, pub/sub), relational databases/ORMs (EF Core), CI/CD pipelines, and secure coding practices (OWASP, OpenID Connect, JWT). Mentor teammates, make autonomous technical decisions, and drive quality, observability, and automation in Agile teams.
Summary Generated by Built In
About Qualysoft
 
·        25 years of experience in software engineering, established in Vienna, Austria
·        Active in Romania since 2007, with office in central Bucharest (Bd. Iancu de Hunedoara 54B)
·        Delivering End to End IT Consulting Services  - From Team Augmentation and Dedicated Teams to Custom Software Development 
·        We deliver scalable enterprise systems, intelligent automation frameworks, and digital transformation platforms
·        Cross-industry experience by sustaining global players in BSFI (Banking, financial services and insurance), Telecom,Retail & E-commerce, Energy and Utilities, Automotive, Manufacturing, Logitics, High Tech
·        Global Presence: Switzerland, Germany, Austria, Sweden, Hungary, Slovakia, Serbia, Romania, and Indonesia
·        International team of 500+ software engineers
·        Strategic partnerships: Microsoft Cloud Certified Partner, Tricentis Solutions Partner in Test Automation and Test Management, Creatio Exclusive Partner, Doxee Implementation Partner
·        Powered by cutting-edge technologies: AI, Data & Analytics, Cloud, DevOps, IoT, and Test Automation.
·        Project beneficiaries ranging from large-scale enterprises to startups
·        Stable growth and revenue increase year over year, a resilient organisation in volatile IT market conditions
·        Quality-first mindset, culture of innovation, and long-term client partnerships
·        Global and local reach – trusted by key industry players in Europe and the US
 

Responsibilities

    • Solid experience in C# and .NET (Core / .NET 8+) and enterprise application development.
     • Strong understanding of software design and architecture principles (SOLID, Separation of Concerns, Clean Architecture, DDD, etc.).
    • Experience with asynchronous communication and distributed systems (message brokers, event-driven architecture, queues, pub/sub).
    • Good knowledge of API development (REST, versioning, resiliency, observability).
    • Experience with relational databases and ORMs (EF Core or similar). 
    • Understanding of CI/CD concepts, automation, and continuous delivery. 
    • Security-first mindset – solid understanding of secure coding principles and common vulnerabilities in modern applications (OWASP, OpenIDConnect, JWT, etc.). 
    • Capable of working autonomously and making well-reasoned technical decisions. 
    • Focused on quality, maintainability, and the long-term sustainability of solutions.
    • Open to feedback, continuous learning, and adopting new technologies.
    • Proactive in identifying and resolving technical issues. 
    • Collaborative, willing to provide mentorship and support to less experienced colleagues.
    • Interest in automation, observability, and continuous process improvement. 

Qualifications

    • Bachelor’s degree in Computer Science, Information Systems or equivalent technical field
    • At least 4 years of experience
    • Experience with Agile development environments 
    • Have very good interpersonal and communication skills and love to be part of a team 

    What We Offer
 
·        Premium medical package
·        Lunch Tickets & Pluxee Card
·        Bookster subscription
·        13th salary/yearly bonuses
·        Enterprise job security with a startup mentality (diverse & engaging environment, international exposure, flat hierarchy) under the stability of a secure multinational
·        A supportive culture (we value ownership, autonomy, and healthy work-life balance) with great colleagues, team events and activities
·        Flexible working program and openness to remote work
·        Collaborative mindset – employees shape their own benefits, tools, team events and internal practices
·        Diverse opportunities in Software Development with international exposure
·        Flexibility to choose projects aligned with your career path and technical goals
·        Access to leading learning platforms, courses, and certifications (Pluralsight, Udemy, Microsoft, Google Cloud)
·        Career growth & learning – mentorship programs, certifications, professional development opportunities, and above-market salary
 

*We are an equal opportunity employer and value diversity. All employment decisions are made without regard to age, gender, disability, race, ethnicity, religion, sexual orientation, or any other protected characteristic. We encourage applicants from all backgrounds to apply.*

Skills Required

  • Solid experience in C# and .NET (Core / .NET 8+)
  • Strong understanding of software design and architecture principles (SOLID, Separation of Concerns, Clean Architecture, DDD)
  • Experience with asynchronous communication and distributed systems (message brokers, event-driven architecture, queues, pub/sub)
  • Good knowledge of API development (REST, versioning, resiliency, observability)
  • Experience with relational databases and ORMs (EF Core or similar)
  • Understanding of CI/CD concepts, automation, and continuous delivery
  • Security-first mindset with knowledge of secure coding principles and common vulnerabilities (OWASP, OpenID Connect, JWT)
  • Bachelor's degree in Computer Science, Information Systems or equivalent technical field
  • At least 4 years of experience
  • Experience with Agile development environments
  • Very good interpersonal and communication skills; ability to work in a team
  • Capable of working autonomously and making well-reasoned technical decisions
  • Willingness to provide mentorship and support to less experienced colleagues
  • Interest in automation, observability, and continuous process improvement
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The Company
HQ: Vienna
342 Employees
Year Founded: 1999

What We Do

With 25 years of experience serving more than 250 international clients, we are a one-stop shop for IT services and digitizing business needs. Powered by more than 500 specialists in Central and Eastern Europe, we have the expertise to close the gap between technology and your business growth

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