Sr. Platform Engineer II

Smarsh•Atlanta, GA

6h•Hybrid

About The Position

Smarsh is seeking a Senior Platform Engineer (IC4) with strong expertise in AWS cloud networking, hybrid connectivity, and regulated cloud environments. This role focuses on designing, automating, and operating secure, scalable network infrastructure across multiple AWS environments while supporting FedRAMP compliance requirements. You will partner with Platform, Security, and CI/CD teams to deliver highly available, auditable, and automated cloud networking solutions. You’ll help build and secure cloud infrastructure in highly regulated environments, working on mission-critical platforms with a strong focus on automation, reliability, and security.

Requirements

Bachelor’s or Master’s degree in Computer Science, Engineering, or related field (or equivalent experience)
8+ years of experience in cloud or platform engineering, with a strong focus on AWS networking
Knowledge of supporting FedRAMP-compliant environments, including familiarity with compliance controls, audit processes, and security documentation
Advanced understanding of AWS networking services (VPCs, subnets, routing, Transit Gateway, Route 53, Direct Connect, VPNs)
Extensive experience with Terraform and Infrastructure as Code
Proven experience orchestrating and automating infrastructure provisioning across multiple environments (dev, staging, production)
Experience integrating infrastructure provisioning into CI/CD pipelines
Proficiency in Python, Go, or Java
Strong Linux and networking fundamentals
Excellent system design, troubleshooting, and problem-solving skills

Nice To Haves

Hands-on experience operating or delivering FedRAMP Moderate or High environments
AWS Advanced Networking – Specialty certification
Experience with Kubernetes and service mesh networking (Istio, Envoy)
Familiarity with zero-trust networking models
Experience supporting multi-account AWS organizations or hybrid-cloud environments

Responsibilities

Design and implement secure, scalable AWS network architectures
Architect hybrid cloud connectivity solutions between on-premises and AWS
Design high-availability and disaster recovery network architectures
Define multi-tenant isolation, routing boundaries, and segmentation strategies
Create and maintain network and architecture diagrams
Develop and maintain Terraform-based infrastructure for AWS networking resources
Orchestrate and automate end-to-end infrastructure provisioning across multiple environments
Design and maintain reusable, environment-aware Terraform modules
Implement promotion workflows for infrastructure changes across environments
Ensure consistency, traceability, and auditability of infrastructure changes
Identify and remediate configuration drift across environments
Support network designs aligned with FedRAMP and NIST 800-53 requirements
Implement and review network security controls including NACLs and Security Groups
Partner with Security and GRC teams to support audits and compliance activities
Assist in investigating and resolving security incidents involving network systems
Maintain documentation required for regulated environments
Optimize AWS network performance, resiliency, and availability
Design and implement network monitoring and alerting using DataDog, Prometheus, and AWS-native tools
Participate in troubleshooting and root cause analysis of complex network issues
Participate in on-call rotation and operational support
Act as a networking subject matter expert across Platform and Infrastructure teams
Contribute to architecture reviews, standards, and best practices
Mentor junior engineers and provide technical guidance
Maintain runbooks, SOPs, and operational documentation