Senior Systems Architect

About SimplePart

SimplePart, part of Infomedia's global automotive SaaS platform, operates 2,750 dealer websites across 25 OEM catalogs. Our parts e-commerce solutions serve dealership networks globally, processing transactions across multiple payment integrations in a PCI DSS-regulated environment. We are entering a pivotal modernization phase while maintaining rigorous compliance with PCI DSS 4.0 and ISO 27001 and pursuing SOC 2 certification.

The Opportunity

As Senior Systems Architect, you will own the architectural vision for SimplePart's infrastructure: maintaining the reliability and security of our current global colocation datacenter environment while designing and driving the plan for modernization.

You'll be a hands-on architect working across four colocation datacenters (Atlanta, Amsterdam, London, Portland), responsible for network design and operations, security posture, compliance readiness, and architecture. 

Beyond the technical work, you'll serve as a technical leader through mentoring junior engineers, setting standards, and helping shape the direction and capabilities of the infrastructure organization as we grow.

Key Responsibilities

Network Architecture & Operations

•    Own the design, implementation, and ongoing optimization of network architecture across all colocation sites and cloud environments.
•    Architect and manage network segmentation, VLANs, VPN tunnels, routing, DNS, and DHCP across a geographically distributed infrastructure.
•    Administer and optimize pfSense firewalls and Snort IDS/IPS, ensuring network integrity and compliance with segmentation requirements.
•    Cloudflare WAF and proxy configurations to protect public-facing dealer websites and e-commerce applications.
•    Design hybrid connectivity solutions bridging on-premises datacenters and AWS as workloads migrate.

Infrastructure & Systems Architecture

•    Design, maintain, and optimize Windows Server environments (2016-2022) across production, staging, and development tiers.
•    Manage Active Directory, IIS, Group Policy, and supporting services for 3k+ dealer websites.
•    Manage Proxmox virtualization environments, optimizing resource allocation and infrastructure flexibility.
•    Oversee and improve server patching cadence and compliance across all environments.
•    Design and maintain comprehensive disaster recovery and backup strategies.
•    Participate in a 24/7/365 on-call rotation for critical incident response.

Cloud Migration & Modernization

•    Evaluate and recommend cloud-native replacements for on-premises services across compute, storage, networking, and monitoring.
•    Architect infrastructure to support the modernization of SimplePart's application stack and data platform, including migration from legacy systems.
•    Establish infrastructure-as-code practices (Terraform, CloudFormation, or equivalent) and cloud operational standards.

Security, Compliance & Risk

•    Serve as a primary technical resource for PCI DSS 4.0 audit readiness and ongoing compliance across all applicable requirements.
•    Support ISO 27001 compliance maintenance and contribute to SOC 2 certification efforts.
•    Oversee vulnerability assessments using Tenable/Nessus and drive remediation priorities across the environment.
•    Maintain and improve security tooling: Microsoft Defender, DUO MFA, and Cloudflare security configurations.
•    Ensure cryptographic standards, access controls, and segmentation testing meet current compliance requirements.
•    Maintain detailed documentation for network diagrams, system designs, configurations, and compliance artifacts.

Technical Leadership

•    Serve as the senior technical authority on the infrastructure and security team, setting architectural direction and standards.
•    Mentor and develop junior team members through hands-on guidance and knowledge sharing.
•    Drive technical decision-making and build a culture of documentation, automation, and continuous improvement.
•    Collaborate cross-functionally with development, product, and executive leadership on modernization planning and roadmap execution.

Required Qualifications

•    7+ years of experience in systems engineering, infrastructure architecture, or a similar senior technical role.
•    Deep networking expertise: demonstrated experience designing and managing enterprise network architectures including segmentation, VLANs, VPNs, routing protocols, DNS, and DHCP.
•    Strong firewall management experience and working knowledge of IDS/IPS systems.
•    Hands-on experience with Windows Server environments, Active Directory, IIS, and Group Policy at scale.
•    Advanced PowerShell scripting for automation, system administration, and infrastructure management.
•    Experience with virtualization platforms (Proxmox, Hyper-V, or VMware).
•    Working knowledge of PCI DSS compliance requirements and audit processes.
•    Demonstrated ability to lead, mentor, and elevate a technical team.
•    Strong documentation practices and ability to communicate architectural decisions to technical and non-technical audiences.
•    Bachelor's degree in Computer Science, Information Technology, or related field or equivalent professional experience.

Preferred Qualifications

•    Experience planning and executing datacenter-to-cloud migrations, AWS experience preferred.
•    Familiarity with ISO 27001 and/or SOC 2 compliance frameworks.
•    Experience with WAF, proxy, and DDoS mitigation configurations.
•    Familiarity with SQL Server administration, replication, and high-availability patterns.
•    Experience in e-commerce, SaaS, or automotive industry environments.