**Position Objective:** Develop and evolve complex and distributed systems; Design technical solutions applying appropriate design patterns for each context. **RESPONSIBILITIES:** * Develop and maintain REST and GraphQL APIs * Participate in architectural decisions, defining standards, guidelines, and best practices * Work with SQL and NoSQL databases, applying data modeling * Work in containerized and Kubernetes-orchestrated environments * Integrate systems using messaging and asynchronous communication * Conduct code reviews focused on quality, readability, and maintainability * Identify structural issues, propose refactorings and technical improvements * Collaborate with Product, Architecture, and DevOps teams * Serve as a technical reference, supporting team development **TECHNICAL REQUIREMENTS:** * Strong proficiency in C# / .NET * Experience with REST and GraphQL APIs * Knowledge and practical application of design patterns (e.g., Factory, Strategy, Repository, Specification, Builder, Adapter, Observer) * Hands-on experience with well-structured architectures: DDD, Clean Architecture, SOLID * Experience with SQL databases: PostgreSQL, MySQL * Experience with NoSQL databases: MongoDB, Redis; Experience with containers and Kubernetes * Practical experience with Git, code review, and CI/CD; Experience with production systems and high-availability environments **BEHAVIORAL REQUIREMENTS:** * Strong sense of responsibility and autonomy * Critical thinking and systemic vision * Ability to make technical decisions and justify choices * Clear communication and collaboration across different areas * Commitment to quality, scalability, and continuous improvement **WORK SCHEDULE:** * Monday to Friday, from 8:30 AM to 5:30 PM, with a one-hour lunch break. * Hybrid model (2 days remote per week). * Location: Vila Industrial, Campinas/SP. **COMPENSATION:** R$13.000,00 (Contractor). **BENEFITS:** * Health plan reimbursement according to Hapvida’s fee schedule * Life insurance and funeral assistance * Transportation reimbursement based on public transport usage, calculated according to your location * Wellhub * Birthday Day Off * Psychological support (subsidized by the company) * Quarterly Recognition Program (with prizes) * Career development plan Employment type: Full-time CLT Payment: R$13.000,00 per month Screening questions: * Have you previously been responsible for architectural decisions in production systems, defining standards, structures, or technical guidelines? * Have you developed and maintained REST and GraphQL APIs in systems handling high user volume or transaction throughput? * Have you applied advanced design patterns (e.g., Specification, Adapter, Observer, Strategy, Builder) in active production systems? * Have you worked on systems structured using DDD, Clean Architecture, and SOLID principles, participating in the definition of such architecture? * Have you worked in high-availability environments using Docker, Kubernetes, and CI/CD pipelines for continuous deployment? * Have you served as a technical reference, performing code reviews, mentoring developers, and elevating the team’s quality standards? * Does the proposed compensation (R$13.000,00 – Contractor) meet your expectations? Work location: On-site