[Job - 31026] Senior PHP Developer (Security Remediation), 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 PHP Security Remediation Developer to join the vulnerability remediation program of one of our clients. Their security scanning tooling is surfacing more findings than the internal team can close — your job is to close that gap. This is not advisory work and it is not a pure security analyst role: you will spend your days in the PHP codebase and in AWS, implementing fixes, validating closures, and driving remediation throughput at scale.The ideal candidate has worked extensively with PHP and has hands-on experience remediating security vulnerabilities, not just identifying them.

What You Will Do

Take prioritized findings from the security backlog and drive each one to deployed, validated completion — researching root cause, implementing the correct fix, deploying it, and producing closure evidence for the client's risk program.

Remediate PHP vulnerabilities hands-on: fix injection, authentication, deserialization, and credential exposure defects; refactor vulnerable patterns; and remove hardcoded secrets.

Perform dependency and package upgrades using Composer, resolving breaking changes and transitive conflicts.

Execute AWS-side remediation: configuration hardening, IAM adjustments, and secret rotation — migrating credentials to a managed secrets store in coordination with the Remediation Lead.

Validate every fix through automated tests and confirm the finding no longer reproduces.

Identify recurring patterns that warrant a systemic fix rather than repeated one-off remediation, and contribute them to the team playbook.

Work embedded with the client's engineering team, following their branching, code review, CI/CD, and definition of done.

Support client engineers in adopting secure coding practices.

What We Require

Professional PHP development experience — including work on legacy or inherited codebases. Recent, active PHP work is required;

Hands-on security remediation experience — you must have personally fixed OWASP Top 10 class vulnerabilities at code level. Understanding them conceptually is not enough.

Excellent English communication skills — daily written and spoken collaboration with a US-based engineering team.

Senior or above seniority level

Experience writing automated tests with PHPUnit or equivalent.

Bachelor's degree in Computer Science, Information Technology, or a related field.

Nice to Have

Proficiency with Git, code review discipline, and CI/CD pipelines.

Experience working with security scanners at volume: Snyk, Veracode, Dependabot, or Checkmarx.

Prior experience burning down a security or technical debt backlog against throughput targets.

Modern PHP frameworks (Laravel, Symfony) alongside legacy pre-framework PHP.

AWS experience specifically with PHP applications: EC2, ECS, Elastic Beanstalk, Lambda, IAM, S3, RDS, CloudWatch, Secrets Manager, or Parameter Store.

Infrastructure as Code with Terraform or CloudFormation.

Containerization with Docker and ECS or EKS.

Experience integrating with legacy systems

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