Senior AWS Cloud Platform Engineer — Architect & Automate

On.Energy; Buenos Aires; On-site; ARS 1,800,000 - 3,200,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Professional development opportunities

Job summary

ON.energy is seeking a Senior AWS Cloud/DevOps/Platform Engineer to design, build, and operate scalable, secure AWS environments with high autonomy and technical leadership.

The role requires best-in-class IaC practices, strong networking expertise, and hands-on AWS proficiency, balancing architectural decisions with hands-on implementation across multi-account setups. English communication is essential as you partner with global teams.

Qualifications

• 5–8+ years of experience in cloud, infrastructure, or DevOps engineering.
• Strong hands-on expertise with AWS services including EC2, VPC, IAM, ALB/NLB, Route 53, S3, RDS, CloudWatch.
• Advanced networking knowledge: TCP/IP, DNS, HTTP/S, CIDR design, subnetting, routing, firewalls, load balancing.

Responsibilities

• Lead design, deployment, and optimization of AWS infrastructure using IaC (CDK/CloudFormation/ Terraform).
• Own AWS networking architecture and implementation including VPC design, VPNs, NAT Gateways, Security Groups, and PrivateLink.
• Architect and support hybrid and multi-account AWS environments at scale.
• Diagnose and resolve complex networking issues (VPN, Direct Connect, routing).
• Drive CI/CD and infrastructure automation with DevOps teams.
• Monitor and optimize cloud performance, cost, and availability.
• Lead incident response, root-cause analysis, and preventive measures.
• Ensure adherence to AWS security best practices and standards.
• Produce and maintain technical documentation and diagrams.

Skills

AWS

Networking

IaC

CI/CD

Linux

Multi-account

English

Education

Bachelor's degree in CS/Engineering

Tools

CDK

CloudFormation

Terraform

Job description

ON.energy is seeking a Senior AWS Cloud/DevOps/Platform Engineer to design, build, and operate scalable, secure AWS environments with high autonomy and technical leadership.

The role requires best-in-class IaC practices, strong networking expertise, and hands-on AWS proficiency, balancing architectural decisions with hands-on implementation across multi-account setups. English communication is essential as you partner with global teams.