Senior Full-Stack Engineer (.NET/Angular) (Modernization & Security) - GovTech / HR Software - Brazil

ABOUT TRUELOGIC At Truelogic we are a leading provider of nearshore staff augmentation services headquartered in New York. For over two decades, we’ve been delivering top-tier technology solutions to companies of all sizes, from innovative startups to industry leaders, helping them achieve their digital transformation goals. Our team of 600+ highly skilled tech professionals, based in Latin America, drives digital disruption by partnering with U.S. companies on their most impactful projects. Whether collaborating with Fortune 500 giants or scaling startups, we deliver results that make a difference. By applying for this position, you’re taking the first step in joining a dynamic team that values your expertise and aspirations. We aim to align your skills with opportunities that foster exceptional career growth and success while contributing to transformative projects that shape the future. OUR CLIENT A leading provider of cloud-based solutions that empower public institutions to modernize and streamline their operations. With over two decades of experience, this organization builds technology that enhances efficiency, fosters transparency, and improves how people serve their communities. JOB SUMMARY We are seeking a Senior Full-Stack Engineer to support and modernize a mission-critical .NET platform with a strong focus on security, performance, and clean architecture. This role spans backend C#, ASP.NET http://ASP.NET Core, and SQL Server development, alongside front-end technologies including jQuery, Kendo UI, Bootstrap, and incremental Angular migration. The engineer will lead structured modernization initiatives, vulnerability remediation, dependency upgrades, and CI/CD improvements while ensuring secure coding practices, scalability, and long-term platform stability within an agile environment. RESPONSIBILITIES - Maintain and enhance browser-based user interfaces built with jQuery, Kendo UI, and Bootstrap, ensuring performance, accessibility, and cross-browser compatibility. - Lead targeted UI modernization initiatives, including framework upgrades and incremental migration to Angular and TypeScript. - Design, develop, and maintain backend services across multi-layered .NET applications using C# and ASP.NET http://ASP.NET Core. - Build and consume RESTful APIs with clean contracts, proper versioning, and secure authentication mechanisms. - Refactor legacy code progressively following SOLID principles and clean architecture patterns without disrupting production stability. - Design and optimize SQL Server schemas, stored procedures, and queries to ensure high performance and data integrity. - Drive vulnerability remediation efforts, including dependency upgrades, CVE triage, and implementation of OWASP secure coding practices. - Develop and maintain automated unit and integration tests to ensure regression coverage and system reliability. - Contribute to CI/CD pipeline enhancements, integrating automated builds, testing, and security scanning. - Collaborate cross-functionally with QA, DevOps, and product teams to support smooth deployments, observability, and continuous modernization efforts. QUALIFICATIONS AND JOB REQUIREMENTS - 5+ years of experience building production-grade .NET applications with strong expertise in C# across .NET Framework and .NET Core. - Hands-on experience designing and implementing RESTful APIs using ASP.NET http://ASP.NET / ASP.NET http://ASP.NET Core. - Solid SQL Server experience including schema design, T-SQL, stored procedures, indexing, and query optimization. - Strong proficiency in JavaScript / TypeScript and experience working with jQuery-based applications, Kendo UI, and Bootstrap. - Deep understanding of SOLID principles, clean architecture, dependency injection, and separation of concerns. - Experience with automated testing frameworks (xUnit, NUnit, MSTest; Jest or Jasmine for front end). - Knowledge of secure coding practices, OWASP Top 10, and vulnerability remediation from SCA tools