Senior Systems Engineer – AWS & Security

This is a remote position. Keystone AI is a true Nearshore provider, attracting the best talent from LATAM and providing our customers with top tier results while offering a cost effective solution. We partner with our clients by building digital teams that extend their capabilities and allow them to leverage our talented nearshore resources.​ We are seeking a highly skilled Senior Systems Engineer contractor with deep expertise in AWS infrastructure and security best practices. This role will support our Infrastructure & Operations team, ensuring reliability, scalability, and security of our systems, with a focus on implementing and maintaining AWS security controls. Requirements Core Responsibilities: Manage and optimize AWS infrastructure (EC2, RDS, S3, IAM,CloudWatch, CloudTrail, GuardDuty, Security Hub, etc.) with a strong emphasis on security best practices. Implement and maintain security monitoring, logging, and alerting in alignment with AWS Data Lake Security Monitoring Recommendations. Automate infrastructure tasks using PowerShell, Terraform, or equivalent tooling. Maintain and improve system hardening, patching, and configuration standards. Assist in troubleshooting escalated infrastructure issues and providing root cause analysis. Support backup, disaster recovery, and high availability configurations for critical workloads. Collaborate with internal teams to ensure infrastructure security requirements are met for all projects. Maintain clear and up-to-date documentation for systems, processes, and configurations. Required Skills & Experience: 5+ years in systems engineering roles, with strong AWS cloud infrastructure experience (IaaS and PaaS). Proven experience implementing AWS security controls, including IAM policy design, key management, encryption, logging, and monitoring. Familiarity withAWS Data Lake architecturesand security monitoring best practices. Hands-on experience with infrastructureautomation tools(Terraform, CloudFormation, PowerShell, etc.). Strong understanding of system hardening (Windows and Linux), patch management, and security compliance frameworks (NIST, CIS, PCI, etc.). Experience withmonitoring tools and alerting systems(CloudWatch, Prometheus, Grafana, or similar). Strong troubleshooting skills in hybrid infrastructure environments. Strong communication skills in English. Preferred Qualifications: AWS Certified Solutions Architect or AWS Certified Security – Specialty. Experience with security event correlation tools (SIEM) and integration with AWS logging services. Experience with ELK Stack (Elastic Stack) management and/or implementation. Familiarity with data lake security in large-scale analytics environments. Knowledge of ITIL processes and change management. Engagement Details: Contract role, full-time hours (PST) Expected to be available for escalations and urgent troubleshooting when needed. This position is remote for LATAM-based applicants. Originally posted on Himalayas