**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** * Design, develop and maintain backend applications and services using C\#, .NET and ASP.NET Core. * Analyze business and technical requirements and translate them into clear, maintainable and testable solutions. * Design and implement REST APIs and system\-to\-system integrations with clear, versioned contracts. * Contribute to reusable integration capabilities and avoid application\-specific point\-to\-point solutions where a generic service is appropriate. * Design and implement synchronous, asynchronous and event\-driven interaction patterns based on solution needs. * Integrate applications using Apache Kafka or equivalent enterprise messaging platforms. * Develop and optimize database interactions with Oracle and other relational databases, including SQL performance considerations. * Apply appropriate architectural patterns, including Clean Architecture, Domain\-Driven Design and event\-driven architecture. * Implement authentication and authorization mechanisms using OAuth 2\.0, JWT and enterprise access\-management solutions. * Build automated unit, component and integration tests using xUnit, NUnit, Moq or equivalent frameworks. * Participate in code reviews and contribute to clean code, security, performance and engineering\-quality standards. * Containerize applications and support delivery through Docker and OpenShift/Kubernetes\-based platforms. * Contribute to CI/CD and build automation using GitHub Actions or equivalent tooling. * Implement logging, metrics and distributed tracing aligned with the organization’s observability standards. * Identify and resolve scalability, reliability and performance issues during development and testing. * Create and maintain technical documentation, API specifications and implementation notes. * Use enterprise\-approved generative AI tools responsibly to improve development, testing and documentation productivity, while validating all generated output. ### **Qualifications** * Minimum 7 years of professional software development experience in enterprise environments. * Minimum 5 years of hands\-on backend development experience with C\# and .NET / .NET Core. * Minimum 3 years of hands\-on experience with ASP.NET Core. * Minimum 3 years of experience designing and implementing REST APIs and system\-to\-system integrations. * Minimum 2 years of practical experience with relational databases, including Oracle and SQL. * Minimum 2 years of experience with messaging or event\-driven solutions, preferably Apache Kafka. * Minimum 2 years of experience with Docker and container orchestration platforms such as Kubernetes or OpenShift. * Proven experience delivering business\-critical enterprise applications through the full software delivery lifecycle. * Experience in banking, financial services or another highly regulated industry is strongly preferred; minimum 2 years is preferred for candidates presented as banking\-experienced. **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 opportu