Job Summary: We are seeking a Mid-Level Fullstack Developer to work on application development and maintenance, collaborating with the team to build stable and high-performance solutions. Key Highlights: 1. Develop and maintain applications 2. Collaborate in building stable and high-performance solutions 3. Advance technical skills in a collaborative environment ### **About Multisoftware** Multisoftware is a technology company focused on transportation and logistics. Our purpose is to improve the world through technology, as we offer the only solution capable of addressing the end-to-end supply chain for major shippers. Currently, we are the market leader in the TMS segment for shippers, with a specialized system for automated transport document issuance, streamlining logistics management across the entire operation. In just over 10 years, Multisoftware has consolidated its presence nationwide and improved results for major shippers and carriers. In addition to our headquarters in Chapecó-SC, we have offices in São Paulo and Minas Gerais. With expansion into Latin America (LATAM), we also serve clients in Colombia, Mexico, Peru, and Chile. Numbers confirm Multisoftware’s leadership: we are the fastest-growing company in the segment, serving over 4,000 customers using our solutions. Multisoftware is part of the nstech ecosystem, integrating a suite of technology solutions aimed at efficiency, innovation, and digital transformation in the logistics and transportation sector. As part of this ecosystem, Multisoftware contributes expertise, technology, and market knowledge—strengthening nstech’s value proposition and expanding its capacity to deliver comprehensive, integrated solutions to customers. We seek a **Mid-Level Fullstack Developer** to work on application development and maintenance, collaborating with the team to build stable, high-performance solutions aligned with business needs. The candidate will interact with various systems, databases, and integrations, advancing technically within a collaborative environment. Responsibilities and Duties: * Develop and maintain applications using **C# and .NET Framework/Core** * Implement and optimize queries and operations in **SQL Server** and **MongoDB** * Develop and integrate **RESTful and SOAP APIs** * Support implementation and usage of **messaging and queuing systems** (e.g., Service Bus) * Integrate internal and external systems * Identify and resolve **bugs and performance issues** * Participate in **code reviews**, following software development best practices * Collaborate with the squad to understand requirements and propose technical solutions * Support maintenance and evolution of the existing architecture Requirements and Qualifications: * Practical experience with **C# and .NET Framework/Core** * Knowledge of **SQL Server** (stored procedures, queries, and performance concepts) * Experience with **MongoDB** or other NoSQL databases * Hands-on experience with **RESTful and SOAP APIs** * Basic to intermediate knowledge of **messaging systems** (Service Bus or similar) * Familiarity with **source code versioning (Git)** * Ability to **debug and troubleshoot** applications * **Preferred Qualifications** * Experience with **microservices architecture** and event-driven design * Experience with **agile methodologies** (Scrum, Kanban) * Understanding of **software security** and secure development best practices * Strong communication and teamwork skills