ELEKS Software Engineering and Development Office is looking for a Senior Full-Stack (.NET + React) Developer, Technical/ Team Lead in Poland, Croatia or EU. ABOUT PROJECT Our client is one of the largest British-American insurance brokers globally, specializing in risk management, insurance and reinsurance brokerage, and investment banking solutions. REQUIREMENTS * 7+ years of experience with C#, .NET Core, NET Framework .NET 8 * 3+ years of experience with React and JavaScript * Experience with Azure native microservices architecture & Azure services (key vault, AKS, storage queue, service bus, azure functions, event hub, AKS, App config) * Security protocols: OAuth 2.0 (OKTA) * Experience with containers Kubernetes, Docker * Hands-on experience in building RESTful APIs based on minimal API approach * Good knowledge of CI/CD based on DevOps services, IaC terraform * Hands-on experience in Unit Testing using XUnit / Nunit * Following DDD (Data Driven Design) * Understanding canonical APIs approach * Experience with databases (MS SQL, Redis Cache, Memory Cache) * Understanding API management, Datadog * Experience in regulated or high-scale environments with reliability/SLA ownership * Prior technical leadership (driving standards, architecture decisions, onboarding junior developers) * At least Upper-Intermediate level of English RESPONSIBILITIES Design, develop, and maintain reliable software in line with technical requirements Analyze requirements, and independently estimate and set up tasks’ acceptance criteria Evaluate and coordinate tasks’ deadlines with the Technical Leader or Project Manager Apply the best software development practices and coding standards to produce high-quality and performant solutions Stay up-to-date with modern technology and optionally obtain professional certifications Participate as a trainer or a trainee in various learning programs outside the main project ABOUT ELEKS ELEKS is a custom software development company. We deliver value to our clients, thanks to our expertise and experience gained from working as a software innovation partner since 1991. Our 2000+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe and North America, provide our clients with a full range of software engineering services. These include product development, QA, R&D, design, technology consulting and dedicated teams.