We are looking for a Senior AWS Infrastructure Engineer to redesign our AWS environment. The successful candidate will lead the design and implementation of a secure, scalable, multi-account AWS architecture , enable cost chargeback, and establish long-term operational best practices. This role is infrastructure-first , requiring strong operating system, networking, and security fundamentals , in addition to deep AWS experience. Key Responsibilities: AWS Architecture & Multi-Account Design Design and implement abest-practice multi-account AWS architectureusingAWS Organizations and Control Tower Define account strategies forcustomers, environments (Prod / Non-Prod), and shared services Establish and maintain anAWS Landing Zonealigned with security and compliance requirements Reduce operational and security risk by eliminating single-account blast radius Migration & Execution Plan and executephased migrationsof existing workloads from a monolithic AWS account to multiple accounts Minimize downtime and risk through careful migration planning, testing, and rollback strategies Work closely with application and platform teams during migration and cutover Infrastructure as Code & Automation Codify account provisioning and baseline infrastructure usingTerraform Automate guardrails, networking, IAM, logging, and security controls Use CI/CD pipelinesto support infrastructure as code, not as an application DevOps role Security & Governance Design and enforcesecurity guardrailsusingSCPs, IAM boundaries, and least-privilege accessImplement and manage centralized security services includingCloudTrail, GuardDuty, Security Hub, and AWS Config Support compliance and audit requirements (e.g. ISO 27001) through strong segregation of duties and logging Networking Design and operate AWS networking at scale, including: VPC design and segmentation Centralized networking models Transit Gateway(nice to have) Hybrid connectivity (VPN / Direct Connect where applicable) Apply strongTCP/IP, DNS, and routing fundamentals Cost Management & Chargeback Implementcost monitoring, budgeting, and reportingusing AWS Cost Explorer and Budgets Enablecost separation and chargeback/showback per customer or account Support long-term FinOps visibility as the AWS environment scales Operating Systems & Infrastructure Operations Apply strongLinux and/or Windows systems engineering knowledge Support OS-level hardening, patching, access control, and troubleshooting Understand how cloud infrastructure maps to underlying OS and network behavior Required Qualifications: Senior-level experience designing and operatingAWS infrastructure at scale Hands-on experience withAWS Organizations, Control Tower, and multi-account architectures Proven experience migrating workloads fromsingle-account to multi-account AWS environments StrongLinux and/or Windows OS fundamentals Strongnetworking fundamentals(TCP/IP, DNS, routing) Infrastructure as Code usingTerraform Experience implementingsecurity guardrails(SCPs, IAM, KMS) Experience withcentralized logging, monitoring, and security tooling Experience withAWS cost management and chargeback/showback models Nice to have: AWS Transit Gateway and advanced networking architectures Experience in regulated or compliance-driven environments (e.g. ISO 27001) AWS Professional certifications (Solutions Architect Pro, DevOps Engineer Pro) Experience designing long-term AWS platform or cloud foundations We thank all applicants for their interest; however, only those selected for an interview will be contacted. FreeBalance is an inclusive employer dedicated to building a diverse workforce to increase the representation of the designated groups based on each country’s legislation. We encourage applications from all qualified candidates and will accommodate applicants’ needs under the respective labour law throughout all stages of the recruitment process. #J-18808-Ljbffr