Job Summary: The Arara Tech is seeking a Senior Fullstack Golang Developer to lead the modernization of technical ecosystems and strategically support the Smart Travel unit. Key Highlights: 1. Leveraging technology as a driver of transformation and innovation 2. Leading strategic system migration and technological modernization 3. Collaborating in a data-driven environment with continuous evolution Are you a dynamic, proactive, data-oriented professional with a genuine desire to create impact? **Arara Tech**, the technology unit of Grupo Guanabara, is looking for a **Senior Fullstack Golang Developer** to operate strategically **within the Smart Travel unit**, connecting technology, business, and results. Here, technology is not support—it is the engine of transformation, efficiency, and innovation. **About Arara Tech** Arara Tech is the technology unit that connects, integrates, and empowers Grupo Guanabara. We operate cross-functionally, unifying systems, data, processes, and people to transform business challenges into efficient, intelligent, and sustainable solutions. We are the bridge between business and the future—and we build that future with method, purpose, and real impact. **Role Overview:** You will be responsible for modernizing our technical ecosystem, leading the strategic migration of the **Smartbus** system (.NET/C#) to **Hermes** (Golang). Your challenge will be to decouple functionalities from a robust monolithic structure into a scalable microservices architecture, ensuring technological evolution and performance for the SmartTravel BU. **Responsibilities and Duties** * Develop and maintain robust applications using Golang, .NET (C#), and related technologies; * Participate in the analysis and definition of technical and functional requirements; * Implement solutions in monolithic and distributed architectures; * Develop RESTful APIs and integrate with external systems; * Collaborate on SQL Server database design and optimization; * Perform unit and integration testing to ensure code quality; * Participate in code reviews and share knowledge with the team; * Identify and resolve performance and scalability issues; * Document technical solutions and development processes; * Collaborate with QA, DevOps, and other technical teams. **Requirements and Qualifications** * Extensive experience in Golang development; * Solid experience with monolithic systems and distributed architectures; * Knowledge of RESTful API development; * Strong expertise in SQL Server (administration, optimization, and development); * Experience with both SQL and NoSQL databases; * Proficiency in version control with Git; * Knowledge of unit and integration testing; * Experience with design patterns and SOLID principles; * Familiarity with agile methodologies; * Strong analytical capability to decompose complex problems and propose technical solutions—even in scenarios with low definition or ambiguity. **Preferred Qualifications:** * Experience with cloud platforms (AWS, Azure, GCP); * Knowledge of containerization (Docker, Kubernetes); * Proficiency in additional languages: .NET, C#, ASP.NET Core, JavaScript, React, and TypeScript; * Experience with CI/CD tools; * Knowledge of Event-Driven Architecture; * Experience with caching technologies (Redis, Memcached); familiarity with DevOps principles. **Additional Information** **For your well-being, we offer:** * PJ contract model * 13th-month bonus * Paid vacation (30 days) * Flexible Meal Allowance (usable for other expenses) * Health insurance with co-payment (SulAmérica) * Performance-based bonus (PLR) **Additionally, for your experience, we provide:** * A collaborative, data-driven environment * Flexible working hours * No dress code * Continuous learning and real business challenges **Why Join Arara Tech?** * Technology with purpose and real impact * Proximity to business operations and strategic decision-making * Opportunity to drive transformation from within a large group * Culture of collaboration, data orientation, and continuous evolution At Arara Tech, technology and business advance together—and people sit at the heart of this transformation. **Interested?** Then join us in building the future of mobility. **Embark on this journey with Arara Tech!** **Who We Are** Arara Tech is the technology unit that connects, integrates, and empowers Grupo Guanabara. Here, technology is not support—it is strategy, the engine of transformation, and an accelerator of results. We operate cross-functionally, connecting systems, data, processes, and people to transform business challenges into efficient, intelligent, and sustainable solutions. We are the bridge between business and the future. And we build that future with method, purpose, and real impact. **Our Purpose** Transforming technology into results, innovation into efficiency, and data into intelligent decisions. At Arara Tech, we view Grupo Guanabara as a strategic internal client. We listen, understand, and deliver solutions that generate value, strengthen competitiveness, and continuously drive digital transformation.