Freebalance.Com3mo ago

Senior AWS Platform Engineer

Canada·OttawaFull-timesenior

EngineeringDevOps & InfrastructurePlatform EngineerDevops EngineerInfrastructure & Cloud

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Quick Summary

Overview

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.

Technical Tools

awsterraformci-cdlinuxnetworking

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

AWS Architecture & Multi-Account Design

Design and implement a best-practice multi-account AWS architecture using AWS Organizations and Control Tower

Define account strategies for customers, environments (Prod / Non-Prod), and shared services

Establish and maintain an AWS Landing Zone aligned with security and compliance requirements

Reduce operational and security risk by eliminating single-account blast radius

Migration & Execution

Plan and execute phased migrations of 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 using Terraform

Automate guardrails, networking, IAM, logging, and security controls

Use CI/CD pipelines to support infrastructure as code, not as an application DevOps role

Security & Governance

Design and enforce security guardrails using SCPs, IAM boundaries, and least-privilege accessImplement and manage centralized security services including CloudTrail, 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 strong TCP/IP, DNS, and routing fundamentals

Cost Management & Chargeback

Implement cost monitoring, budgeting, and reporting using AWS Cost Explorer and Budgets

Enable cost separation and chargeback/showback per customer or account

Support long-term FinOps visibility as the AWS environment scales

Operating Systems & Infrastructure Operations

Apply strong Linux 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

Senior-level experience designing and operating AWS infrastructure at scale

Hands-on experience with AWS Organizations, Control Tower, and multi-account architectures

Proven experience migrating workloads from single-account to multi-account AWS environments

Strong Linux and/or Windows OS fundamentals

Strong networking fundamentals (TCP/IP, DNS, routing)

Infrastructure as Code using Terraform

Experience implementing security guardrails (SCPs, IAM, KMS)

Experience with centralized logging, monitoring, and security tooling

Experience with AWS cost management and chargeback/showback models

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.