**Senior Full Stack C# Developer** **Job Description:** We are looking for a **Senior Full Stack C# Developer** to work on the development and evolution of medium- and large-scale systems within the technology area of a major bank. We seek a hands-on professional with strong technical responsibility, solid analytical ability, and extensive experience in both backend and frontend development, API integration, and database management, in a collaborative environment focused on software engineering best practices. **Project:** \\The selected professional will work in squads responsible for maintaining and evolving existing systems and developing new applications. Day-to-day activities include development using **C# and .NET / .NET Core**, object-oriented applications, service integration via **REST APIs**, and work with **SQL Server / Transact-SQL** for queries, modeling, and optimization. Work follows Agile methodology (Scrum), with constant interaction across multidisciplinary teams throughout the entire development lifecycle. **Project Scale:** \\Medium-to-large corporate environment with critical systems and high-volume integrations. The role demands focus on quality, performance, security, and stability, as well as active participation in technical improvements and continuous application evolution. **Team Size:** \\The developer will join an established structure within the bank, working alongside other developers, technical leads, and product/business areas. Frequent collaboration will occur for technical refinement, alignment, and delivery. **Responsibilities:** \\Develop and maintain systems using **C# and .NET / .NET Core**; \\Build solutions grounded in strong **Object-Oriented Programming** principles; \\Actively participate in evolving existing systems and developing new applications; \\Work in teams applying Agile methodologies, with emphasis on Scrum; \\Contribute to technical analysis of requirements, proposing improvements and solutions aligned with business needs; \\Develop and consume **REST APIs**, ensuring quality, security, and performance; \\Collaborate closely with the technical team throughout the entire development lifecycle; \\Support code quality maintenance, refactoring, and continuous improvements. **Key Tasks:** \\Development and maintenance of applications in **C#** (Full Framework and **.NET Core**); \\Implementation and maintenance of architectural patterns **MVC and MVVM**; \\Building and integrating services and **Web API**; \\Working with legacy components/systems when required (**MVC, Web Forms, Windows Services**); \\Version control and branch management using **Git and Gitflow**; \\Creating and optimizing queries, views, and routines in **SQL Server (T-SQL)**; \\Participation in Agile ceremonies and technical alignment sessions; \\Identifying improvement opportunities and driving end-to-end technical solutions. **Additional Requirements and Qualifications (Tools and Skills):** \\Minimum **5 years** of experience in **.NET** development; \\Solid knowledge of **C# Full Framework** and **.NET Core (2.x or higher)**; \\Strong command of **Object-Oriented Programming**; \\Practical experience with **MVC and MVVM** architectures; \\Experience with **Scrum** and Agile practices; \\Experience with **Git and Gitflow**; \\Knowledge of **SQL Server and Transact-SQL**, including query modeling and optimization; \\Proven experience with **MVC, Web Forms, Web API, and Windows Services**; \\Experience developing and integrating **APIs**; \\Ability to align business needs with technical solutions, demonstrating strong communication and collaboration skills. **Nice-to-Haves:** \\Experience with modern front-end frameworks, especially **React**; \\Experience with **Angular** or **Vue**; \\Knowledge of containers (**Docker**); \\Experience with **CI/CD** and delivery pipelines; \\Experience in medium- and large-scale corporate environments. **Work Model:** \\Hybrid — **3 days onsite** at the bank’s office and **2 days remote**. **MJV Benefits:** TotalPass\\Wellhub; ‍‍‍‍ Group life insurance; Meal/Voucher allowance; Health and dental plan — Bradesco; Training initiatives: talks, forums, knowledge-sharing sessions, and discussions related to our business. We stay constantly connected to learn more — together; \+MJVer Program: internal referral program where you refer a colleague to join us, and if the match is successful, you receive a reward. Partnerships: want discounts? We have a Workplace group where we share partnerships with educational institutions, language schools, gyms, restaurants, products, and other services;