Principal Architect – Legacy Modernization (AWS)
Posted November 13, 2026
Job Description
- This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Architect – Legacy Modernization (AWS) based in Brazil. We are looking for a Principal Architect to lead a strategic, high-impact modernization initiative, migrating legacy Mainframe systems to the AWS cloud. You will serve as the primary technical authority and trusted advisor, shaping architectures that deliver scalability, security, and operational efficiency. A key part of the role will be integrating generative AI tools and intelligent agents into the software development lifecycle to accelerate refactoring, testing, and delivery. Combining hands-on technical leadership with strategic vision, you will guide engineering teams, manage architectural risks, and engage with senior business and technology stakeholders. You will also contribute to technical proposals and pre-sales activities, helping drive project growth and innovation. The position is remote; however, professionals residing in the Campinas metropolitan area are required to attend the local offices in accordance with the applicable attendance policy.
- Accountabilities Design and implement technical solutions for complex Mainframe modernization projects, migrating legacy technologies such as COBOL, JCL, CICS, DB2, and VSAM to AWS. Define cloud architecture and refactoring strategies that ensure scalability, security, performance, and long-term maintainability. Establish and implement data governance and system architecture standards, ensuring compliance with security requirements and best practices. Lead the adoption of AI-powered development tools, including AWS Transform and intelligent agents, to automate refactoring activities and accelerate software delivery. Configure, customize, integrate, and optimize AI agent ecosystems for project-specific requirements, ensuring the quality and reliability of their outputs. Manage architectural and transformation risks, acting as an escalation point for complex technical issues and key stakeholders. Facilitate communication and alignment between C-level executives, business teams, engineering groups, and other technical stakeholders. Define project performance metrics, identify improvement opportunities, and promote continuous optimization. Build, structure, and lead high-performing teams of software architects and engineers, applying agile engineering practices. Mentor and develop other architects, identify technical talent, and support succession planning. Act as a trusted technology advisor, translating architectural recommendations into measurable business value. Ensure consistency in architecture and engineering standards across all project squads. Participate in pre-sales initiatives by developing technical proposals, supporting contract expansion, and identifying opportunities with new clients. Requirements: Extensive experience at Principal or Specialist level in Software Engineering, Platform Engineering, Cloud Engineering, or related fields. Strong hands-on experience with AWS, cloud architecture, and application deployment. Solid software development experience with React, Java, and/or Node.js. Proven experience in legacy Mainframe modernization projects, particularly migrating COBOL, JCL, CICS, and DB2 environments 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 pipelines, infrastructure automation, and Infrastructure as Code. Knowledge of applying AI technologies to software development. Demonstrated ability to configure, integrate, and optimize AI agent ecosystems. Understanding of modern architectures, distributed systems, microservices, event-driven architectures, and messaging queues. Experience with observability practices, including logging, metrics, and tracing. Ability to work across the full technology lifecycle, from architecture and implementation to production operations. Strong troubleshooting skills and the ability to resolve complex technical challenges. Analytical thinking and sound technical judgment, with the ability to evaluate alternatives and avoid unnecessary complexity. Excellent communication and collaboration skills, particularly when working with engineering, architecture, security, cloud, technical leadership, and clients. Nice to have: AWS Certified Solutions Architect – Professional certification. In-depth practical experience with AWS Mainframe Modernization and AWS Transform. Proven experience applying AI agents across the software development lifecycle to accelerate complex migration and modernization projects. Benefits: Health and dental insurance. Meal and food allowances. Childcare assistance. Extended parental leave. Wellbeing partnerships: Access to gyms, health professionals, and wellness services through Wellhub (Gympass) and TotalPass. Profit-sharing program (PLR). Life insurance. Continuous learning: Access to a dedicated learning platform and internal university. Discount club: Access to partner discounts and special offers. Physical and mental wellbeing: Free online platform dedicated to health and wellbeing. Parenting support: Courses on pregnancy and responsible parenting. Online learning partnerships: Access to external course platforms. Language learning: Access to a dedicated language-learning platform. Additional benefits and employee support initiatives.
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