Sr Full-Stack Developer

São Paulo, State of São Paulo, Brazil remote Until 9/19/2026 5+ years exp First posted July 21, 2026 Last posted July 21, 2026
Job description

We are looking for a senior engineer to join a brownfield product environment and help evolve a modern full-stack application with a strong focus on backend reliability, cloud architecture, and secure development practices.

As a Senior Full-Stack Engineer, you will build and maintain production software across the frontend and backend, with a primary focus on TypeScript, Node.js, and React/Next.js. You will work in an AWS-based environment and contribute to systems that must be reliable, secure, and maintainable at scale.

You should be comfortable navigating legacy or brownfield codebases, improving architecture incrementally, and collaborating closely with product and engineering stakeholders. Experience using AI coding tools is welcome, but only when paired with careful review and validation of the generated output.

Responsibilities

  • Develop and maintain features across the stack using TypeScript, Node.js, React, and Next.js.
  • Build and support backend services and cloud components in AWS, including Lambda, SQS, DynamoDB, and IAM.
  • Improve system reliability, maintainability, and performance in an existing production codebase.
  • Apply security-conscious development practices and support secure-by-default engineering decisions.
  • Collaborate with product and technical stakeholders to deliver high-quality solutions.
  • Review, validate, and refine AI-assisted code and tooling outputs before merging into production.
  • Contribute to engineering best practices, code quality, and technical documentation.

Requirements

  • 5+ years of production software engineering experience.
  • Strong hands-on experience with TypeScript, Node.js, and React/Next.js.
  • Proven experience with AWS services, especially Lambda, SQS, DynamoDB, and IAM.
  • Experience working in brownfield or legacy codebases.
  • Security-aware engineering mindset, with familiarity with NIST 800-53 or comparable security frameworks.
  • Practical knowledge of AWS Security Hub, CIS benchmarks, or similar cloud security standards.
  • Experience using AI coding tools critically, with emphasis on validation and sound engineering judgment.
  • Bachelor’s degree in Computer Science or a related field.

Nice to Have

  • Experience modernizing legacy systems incrementally.
  • Familiarity with observability, testing strategy, and deployment pipelines.
  • Experience in regulated or security-sensitive environments.
  • Strong communication skills and a proactive, collaborative working style.

Benefits

  • Compensation in USD.
  • Fully remote work.
  • Career growth opportunities in an international company.
About this role

Summary

Develop and maintain full-stack applications, improve reliability, security, and cloud architecture.

Job title

Sr Full-Stack Developer

Experience level

5+ years

Minimum experience

5+ years exp

Industry

software

Location requirements

remote work allowed, based in São Paulo, Brazil

Salary

Compensation in USD.

Management role

No

Skills & keywords

Required skills

typescriptnode.jsreactnext.jsaws

Preferred skills

legacy system modernizationobservabilitytestingdeployment pipelinessecurity frameworks

Specializations

full-stacktypescriptnode.jsreactaws
Locations

Structured locations inferred from the posting.

Unknown location

Remote