Lead Full Stack Engineer

Lead Full Stack Engineer (.NET + Angular) (#4276) South America Work type: Office/Remote Technical Level: Leader Job Category: Software Development Project: Top American Provider of Electrical Operations and Maintenance Services We are seeking an experienced Lead Full Stack Engineer to join a high-impact, strategic technology initiative. Our mission is to evolve a core business application for a market-leading enterprise, proactively transforming the platform into a secure, maintainable, and high-performance architecture. As the team's technical pillar, you will be responsible for guiding the hands-on transformation of a legacy stack (.NET Framework 4.5.2, Angular 6) into a modern, decoupled, API-driven architecture, building the foundation for future innovation and scale. What You'll Do: Lead the hands-on architecture and development for the complete modernization of a flagship business application. Guide the backend migration from the legacy .NET Framework 4.5.2 to .NET 10. This includes replacing the OWIN-based hosting infrastructure with native ASP.NET Core middleware and refactoring code to remove System.Web dependencies (e.g., HttpContext, Session). Spearhead the complex frontend migration from Angular 6 to Angular 20. You will manage an incremental, version-by-version approach to mitigate risk, addressing numerous breaking changes and updating third-party libraries. Collaborate with the Solution to implement and enforce a strict "API-first" decoupled architecture, ensuring a clean separation between the new SPA frontend and the .NET 10 backend. Work closely with the DevOps Engineer to build and optimize multi-stage CI/CD pipelines in Azure DevOps using YAML. Mentor and guide the team's Senior and Middle engineers , establishing best practices and ensuring code quality within the new architecture. Partner with the QA team to support the creation of the manual regression test suite and validate functionality during continuous in-sprint testing phases. What We're Looking For: Extensive senior-level software engineering experience with a proven track record of leading complex technical modernization projects. Deep mastery of the .NET ecosystem , including experience with both legacy .NET Framework 4.x (particularly ASP.NET) and modern .NET Core / .NET 10. Expert-level Angular skills , specifically with demonstrable experience in complex migrations across multiple major versions (e.g., migrating from Angular 6 or similar). Experience architecting and migrating monolithic (tightly-coupled) applications to decoupled, API-driven Single Page Application (SPA) architectures. Solid hands-on experience with Azure DevOps , particularly building and managing YAML-based CI/CD pipelines. Proven experience with MySQL , including upgrading data access drivers (e.g., from MySql.Data to MySql.EntityFrameworkCore) and refactoring data access logic. Familiarity with the challenges of replacing legacy .NET components like System.Web, OWIN, and Microsoft.AspNet.WebApi.Core. Strong communication and collaboration skills to work effectively with multidisciplinary technical teams (DevOps, QA, DBAs) and manage project dependencies. Exceptional command of written and spoken English. Why Join Us? Take the primary technical leadership role in a critical, high-impact modernization project. Solve complex technical challenges spanning deep framework migrations and a complete architectural transformation. Work with a dedicated, multidisciplinary team of architects, engineers, and QA specialists focused on a clear objective. See the direct results of your work as you transform a core application into a modern, secure, and high-performance platform. Be part of a quality first company, multiple options for getting new education and certifications. We offer*: Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing #J-18808-Ljbffr