• Responsible for designing, developing, and maintaining backend systems with a focus on integrations, ensuring high performance, scalability, and reliability • Take ownership of complex features from design through production monitoring, ensuring high availability and performance • Collaborate closely with Product Managers and Engineers to translate business requirements into scalable technical specifications • Design and implement event-driven architectures and distributed systems using Azure Service Bus and Hangfire • Oversee database health and strategy, including complex schema design, performance tuning, and ensuring data integrity • Prepare and maintain architectural diagrams and system documentation • Act as a subject-matter expert in .NET (C#), PostgreSQL/SQL Server, REST APIs, GraphQL, and the Azure ecosystem • Integrate with partner APIs to enable seamless data flow and business process automation

• Develop applications using low-code platforms, following project specifications and requirements. • Develop software by writing code for applications, programs, and systems in accordance with project specifications and requirements. • Test developed software, identify and fix issues, bugs, and code defects, ensuring delivery quality, adherence to deadlines, and Certsys customer satisfaction. • Document developed code to facilitate future maintenance and updates. • Support the development team by providing technical guidance and leadership in delivering high-quality solutions. • Develop high-quality software solutions, ensuring code is efficient, scalable, and maintainable. • Research and adopt new technologies to improve software performance and efficiency. • Monitor production systems to identify issues and implement solutions. • Participate in periodic audits, providing required information and evidence as requested by auditors. • Conduct onboarding for new team members, sharing knowledge about processes, service models, and Certsys standards.

• Collaborate with Brazil’s leading digital bank • Develop back-end solutions in Kotlin

• Develop and evolve backend services in Python, building APIs and business components with a focus on quality, readability and maintainability. • Participate in the development of digital solutions using sound architecture and software engineering practices (Clean Architecture, SOLID, modeling and design patterns), applying them pragmatically in day-to-day work. • Contribute to projects that use agile methodologies and practices such as code review, pair/mob programming, continuous integration and quality automation to deliver high-quality software. • Work in an AI‑augmented development cycle: use generative AI (e.g., Copilot and LLMs) to accelerate coding, documentation and analysis, while maintaining a critical stance and performing technical validation of outputs. • Contribute to Spec‑Driven Development, helping to turn requirements into clear specifications and context artifacts (e.g., /specify and /plan) that guide AI agents and reduce ambiguities. • Participate in reviews focused on “intentionality”: beyond syntax, verify adherence to acceptance criteria, consistency with technical decisions and the functional impact of the code (including when generated by AI). • Collaborate on DevOps/CI/CD and observability practices according to the team’s context, aiming for frequent and reliable deliveries. • Support ongoing maintenance and product evolution by contributing to fixes, improvements and the reduction of technical debt at a sustainable pace.