Senior Master Fullstack Developer 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 a **Senior or Master Full Stack Developer** who can take product requirements, design the technical solution, and build it. You will own features end to end on a cloud enterprise platform: backend services, APIs, integrations, and React interfaces that support complex business workflows. You will also support the live project — investigating issues, fixing bugs, and keeping the platform running. This role uses AI intensively in day-to-day work, with judgment: you decide when it helps, review the output, and remain accountable for the result. ### What you will do: * Work with product to understand requirements, then design and implement the solution; \- Build backend services in Python and frontend applications in React; \- Design and maintain REST APIs, data contracts, and integrations with external systems; \- Build resilient systems (async processing, retries, fault tolerance); \- Contribute to the design system, reusable components, and Storybook; \- Use PostgreSQL, Temporal, Docker, and AWS Bedrock; \- Write tests, follow accessibility standards, and keep the UI maintainable; \- Investigate and fix bugs in production and in development; \- Add observability with OpenTelemetry and Grafana; \- Work with Terraform and GitHub Actions for CI/CD; \- Contribute to architecture decisions and help raise engineering standards; \- Use AI tools heavily to speed up design, coding, and troubleshooting — always with review and sound engineering judgment. ### Required Qualifications: ### \- Advanced English; * Hands-on production experience with both backend and frontend technologies; \- Python (production), REST APIs, Docker, API Gateway, PostgreSQL; \- Event-driven / async processing, message queues, workflow orchestration (e.g. Temporal); \- GitHub Actions, observability (OpenTelemetry, Grafana, or similar); \- React, JavaScript or TypeScript, HTML/CSS, responsive UI, REST integration; \- Storybook, frontend testing with Playwright, Git; \- Knowledge of Terraform and design systems; \- Ability to turn product requirements into a technical design and working software; \- Distributed systems, resilience patterns, auth (OAuth, OIDC, SSO, RBAC); \- Production troubleshooting and bug fixing, accessibility, clear communication; \- Comfortable using AI as a core part of the workflow, with the judgment to validate, correct, and own the output. ### Nice to Have: * AI/LLM integrations, enterprise SaaS, Jest/Cypress, design systems at scale, cloud frontend deploys, mentoring. ### Our benefits: * Health and dental insurance * Meal and food allowance * Childcare assistance * Extended paternity leave * Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; * Profit Sharing and Results Participation (PLR); * Life insurance * Continuous learning platform (CI&T University); * Discount club * Free online platform dedicated to physical, mental, and overall well-being * Pregnancy and responsible parenting course * Partnerships with online learning platforms * Language learning platform And many more! More details about our benefits here: At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important **to present your assessment during the selection process.** _See which data needs to be included in the report by clicking here_.This way, we can ensure the support and accommodations that you deserve. **If you do not yet have the assessment, don't worry: we can support you in obtaining it.** We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side. Originally posted on [Himalayas](https://himalayas.app)