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CI&T

Principal Architect – Legacy Modernization, AWS

CI&T

. Lead the technical modernization of legacy/Mainframe systems to a distributed ecosystem on AWS .

Posted 11/11/2026full-timeBrazilLeadWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in leading the modernization of legacy systems to AWS, with a strong focus on scalable architecture, AI integration, and team leadership. Proven ability to manage complex projects, mentor teams, and align technical strategies with business objectives.

Highest-signal resume keywords
AWS Cloud ArchitectureLegacy/Mainframe ModernizationReact DevelopmentAI Agent ConfigurationCI/CD and Infrastructure as Code

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Software EngineeringPlatform EngineeringCloud EngineeringDockerKubernetesAPIsMicroservicesObservabilityTroubleshootingData Governance
Soft Skills
Strong CommunicationAnalytical MindsetProblem SolvingMentoringTeam Leadership
Tools & Technologies
AWS TransformAWS Mainframe ModernizationAI AgentsInfrastructure AutomationSecrets Management
Certifications & Qualifications
AWS Solutions Architect Professional
Industry Keywords
Mainframe SystemsCOBOLCICSDB2CI/CDDistributed SystemsEvent-Driven ArchitectureNetworkingCloud DeploymentTechnical Proposals

Tech Stack

Tools & technologies
AWSCloudDockerJavaJavaScriptKubernetesNode.jsReact

About the role

Key responsibilities & impact
  • Lead the technical modernization of legacy/Mainframe systems to a distributed ecosystem on AWS
  • Design and implement scalable, secure, and efficient architectures and technical solutions
  • Use AWS Transform and AI agents to accelerate refactoring, testing, and delivery
  • Develop solutions to modernize Mainframe systems (COBOL, CICS, DB2, VSAM) for AWS
  • Define and implement data governance and systems architecture strategies
  • Configure, customize, and optimize AI agent tools and systems
  • Manage risks associated with the overall transition architecture and serve as an escalation point
  • Facilitate alignment among executives, business stakeholders, and engineering teams
  • Define key metrics and propose continuous improvements
  • Structure, build, and lead teams of architects and software engineers
  • Mentor other architects, identify talent, and develop succession plans
  • Serve as a Trusted Advisor, translating technology strategies into business impact
  • Ensure consistency of architecture and engineering standards across squads
  • Participate in presales by designing technical proposals and pursuing contract expansions and new logos
  • Work hands-on, from technical proposals and presales through agent configuration, troubleshooting, and team building

Requirements

What you’ll need
  • Principal- or Expert-level experience in Software Engineering, Platform Engineering, Cloud Engineering, or related fields
  • Strong hands-on experience with AWS, cloud architecture, and application deployment
  • Extensive development experience with React, Java, and/or Node.js
  • Demonstrated hands-on experience in Legacy/Mainframe modernization projects (COBOL, JCL, CICS, DB2) to the cloud
  • Experience with Docker, Kubernetes/EKS, and container-based architectures
  • Strong knowledge of APIs, API gateways, IAM, authentication, authorization, secrets management, and networking
  • Experience with CI/CD, infrastructure automation, and Infrastructure as Code
  • Knowledge of using AI in software development
  • Demonstrated ability to configure, integrate, and optimize AI agent ecosystems
  • Knowledge of modern architectures, distributed systems, microservices, events, and queues
  • Experience with observability, logging, metrics, and tracing
  • Ability to work across architecture, implementation, and production operations
  • Strong troubleshooting skills and the ability to solve complex problems
  • Analytical mindset and sound judgment when evaluating technical alternatives, avoiding unnecessary complexity
  • Strong communication skills for interacting with Engineering, Architecture, Security, Cloud, technical leadership, and clients
  • AWS Solutions Architect Professional certification, deep practical experience with AWS Mainframe Modernization, AWS Transform, and the application of AI agents are a plus

Benefits

Comp & perks
  • Health and dental insurance
  • Meal and food allowances
  • Childcare assistance
  • Extended parental leave
  • Partnerships with gyms and health and wellness professionals through Wellhub (Gympass) and TotalPass
  • Profit-Sharing and Results Program
  • Life insurance
  • Continuous learning platform (CI&T University)
  • Discount club
  • Free online platform dedicated to promoting physical and mental health and well-being
  • Pregnancy and responsible parenthood course
  • Partnerships with online course platforms
  • Language-learning platform
  • Support and accommodations for people with disabilities throughout the hiring process
  • Dedicated Health and Well-being team
  • Inclusion specialists and affinity groups