[Job-00024] Senior Fullstack Engineer, Brazil

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions.

With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.

We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

We are looking for aSenior Full-stack Engineer to help evolve a web application, build reliable enterprise integrations, and scale document processing capabilities.

In this role, you will work across front-end and back-end development, translating design specifications into high-quality user experiences while developing versioned APIs and scalable processing workflows. You will contribute to integrations with enterprise platforms such as SAP S/4HANA and Ivalua, helping deliver robust and maintainable solutions.

Responsibilities

• Rebuild and enhance the web application based on the Design team's mockups, usingNext.js, React, and TypeScript.
• Develop user-facing features, including PDF grounding views that help users review and validate information extracted from documents.
• Design, develop, and maintain versioned APIs usingPython and Django REST Framework.
• Build and maintain integrations betweenPegasus, SAP S/4HANA, and Ivalua, ensuring reliable data exchange across systems.
• Scale asynchronous batch processing withCelery to support workloads involving up to 10,000 PDF documents.
• Work withPostgreSQL to support application data management and persistence.
• Implement user metrics to provide insights into application usage and support data-driven improvements.
• Ensure application quality through automated testing, code reviews, documentation, and engineering best practices.
• Identify and resolve performance bottlenecks across the application, APIs, integrations, and background processing workflows.
• Collaborate with design, product, and engineering teams to deliver scalable solutions aligned with business needs.

Requirements for this challenge

• Strong professional experience in full-stack software development.
• Hands-on experience withNext.js, React, and TypeScript.
• Strong proficiency inPython and experience developing APIs with Django REST Framework.
• Solid knowledge ofPostgreSQL, including data modeling and database interactions.
• Experience building and maintaining RESTful APIs and integrating external enterprise systems.
• Experience with asynchronous task processing and background jobs, particularlyCelery.
• Understanding of scalable application architecture, performance optimization, and reliable data processing.
• Experience translating design mockups into responsive, user-friendly interfaces.
• Knowledge of software testing, version control, code reviews, and maintainable coding practices.
• Strong analytical and problem-solving skills.
• Ability to collaborate effectively with cross-functional teams and take ownership of technical solutions.

Nice to Have

• Experience integrating withSAP S/4HANA and procurement or enterprise platforms such as Ivalua.
• Experience processing large volumes of documents, particularly PDFs.
• Familiarity with document preview, annotation, grounding, or validation interfaces.
• Experience implementing product analytics, user metrics, and usage tracking.
• Knowledge of cloud-based deployments, CI/CD pipelines, and application observability.
• Experience improving the performance and reliability of distributed processing workflows.