[Job-31173] Senior/Master Fullstack Developer (Python/React), 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.

#LI-TO1

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: https://ciandt.com/br/pt-br/carreiras

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.