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

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.