Senior Full Stack .NET Developer

Description

We are looking for a **Full Stack .NET Developer** to work with one of our strategic clients in the insurance sector, focusing on the development, maintenance, and evolution of mission-critical business applications built on the Microsoft technology stack. We seek a hands-on professional with solid experience in **C# / .NET** and practical expertise in **ASP.NET Web Forms**, capable of maintaining and enhancing production systems, diagnosing and resolving incidents, and ensuring service stability. The candidate will work end-to-end — from back-end to web layer — alongside multidisciplinary teams and business units. **Responsibilities and duties** * Develop, maintain, and evolve web applications using **C# / .NET** and **ASP.NET Web Forms**; * Support production systems, ensuring application stability and optimal performance; * Diagnose and resolve technical incidents and issues, contributing to operations in a critical environment; * Develop and integrate data access and manipulation routines; * Write clean, testable, and maintainable code following software development best practices; * Participate in code reviews and contribute to the team’s technical growth; * Collaborate effectively with multidisciplinary teams and business units; * Contribute to continuous improvement of development and maintenance processes. **Requirements and qualifications** * Solid experience in **C# / .NET** development; * Practical experience with **ASP.NET Web Forms**; * Experience in web development (**HTML, CSS, JavaScript**); * Knowledge of relational databases and writing **SQL** queries; * Experience with source code versioning (**Git**); * Experience supporting applications and handling incidents; * Ability to collaborate effectively within multidisciplinary teams. **Desirable:** --------------- * Knowledge of **Oracle / PL-SQL**; * Experience with **ASP.NET MVC** and/or **.NET Core**; * Experience with **REST APIs** and Web Services; * Familiarity with cloud environments (preferably **Azure**); * Prior experience in the insurance or financial sector. **Additional information** * Meal Allowance and/or Food Voucher; * SESI and SESC health and wellness benefits, offering access to healthcare, wellness, and leisure services; * Partnerships with educational institutions, providing exclusive discounts on courses and academic programs; * Opportunities for career growth and participation in strategic projects; * Opportunity to work at a rapidly expanding company in the market. Extractta was founded with the purpose of transforming technology into tangible results for companies across diverse industries. Throughout our journey, we have established ourselves as an innovation and technology consulting firm that combines strategy, people, and digital solutions to support organizations in their growth and transformation challenges. We operate across multiple fronts — from digital innovation and transformation to project and operations management — helping companies achieve exceptional outcomes through efficiency, process intelligence, and continuous adaptation. We also stand out for our specialized consulting that helps partners advance their digital culture, communication, data capabilities, and adoption of emerging technologies, while global partnerships enable us to deliver top-tier solutions to our customers’ ecosystems — all backed by a highly skilled team! At Extractta, we believe people make the difference. That’s why we invest in a collaborative, innovative, and open environment where every talent has space to learn, grow, and contribute to challenging projects that truly transform businesses. If you’re looking for a company in constant evolution, passionate about technology and committed to its employees’ development, this could be your place. Join Extractta and help build the future with us.