Senior AWS Cloud Engineer

On.Energy; Buenos Aires; Presencial; ARS 1.800.000 - 3.200.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Medical, dental, and vision insurance

Professional development opportunities

Descripción de la vacante

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.

Formación

• 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.

Responsabilidades

• 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.

Conocimientos

AWS

Networking

IaC

CI/CD

Linux

Multi-account

English

Educación

Bachelor's degree in CS/Engineering

Herramientas

CDK

CloudFormation

Terraform

Descripción del empleo

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.

We are seeking a Senior AWS Cloud / DevOps / Platform Engineer who operates with a high level of autonomy and technical leadership to design, build, and operate scalable, secure AWS environments.

This role is ideal for experienced engineers who not only have deep hands‑on AWS expertise, but can also independently drive architecture decisions, lead implementations end-to-end, and proactively identify improvements across cloud infrastructure, networking, and automation.

You will partner with DevOps, Security, and Application teams while serving as a key technical owner for cloud platform reliability, scalability, and performance.

Key Responsibilities

• Lead the design, deployment, and ongoing optimization of AWS infrastructure using Infrastructure as Code (IaC) (CDK, CloudFormation, Terraform)
• Own AWS networking architecture and implementation, including:
  • VPC design, subnet strategy, and routing
  • Client VPN and site-to-site VPN
  • Internet Gateways, NAT Gateways
  • Security Groups and Network ACLs
  • VPC Peering, Transit Gateway, and PrivateLink
• Architect and support hybrid and multi-account AWS environments at scale
• Independently diagnose and resolve complex networking issues, including VPN, Direct Connect, and routing challenges
• Drive CI/CD and infrastructure automation initiatives in collaboration with DevOps teams
• Proactively monitor and optimize cloud environments for performance, cost, scalability, and availability
• Lead incident response, root cause analysis, and implementation of preventive measures
• Ensure adherence to AWS security best practices and compliance standards
• Produce and maintain high-quality technical documentation and architectural diagrams

Required Skills & Experience

• 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, including:
  • TCP/IP, DNS, HTTP/S
  • CIDR design, subnetting, and routing strategies
  • Firewalls, load balancing, and secure network design
• Proven experience designing and managing Infrastructure as Code solutions
• Strong Linux systems knowledge
• Demonstrated ability to independently troubleshoot and resolve complex system and network issues
• Experience operating in multi-account AWS environments (AWS Organizations, cross‑account access)

Education (Required)

• Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related technical field from an accredited university in LATAM (e.g., Argentina, Chile, México, or equivalent) is required

Soft Skills

• Strong ownership mindset with the ability to work independently and drive outcomes
• Excellent problem‑solving and analytical skills
• Ability to clearly communicate complex technical concepts in English
• Proactive, self‑directed, and highly accountable
• Collaborative approach with the ability to influence across teams

For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities
• Opportunity to grow with a mission‑driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Accommodations: If you need an accommodation during the application process, email [e-mail]
• Benefits vary by role and location and are subject to change.