Infrastructure Security Engineer

Antithesis; Vienna (VA); On-site; USD 100,000 - 130,000; Full time

Job summary

A technology company is seeking an experienced Infrastructure & Security Engineer to join their Platform team in Vienna. The role involves designing and operating secure cloud infrastructure that enhances system resilience and correctness. Ideal candidates will have extensive experience in cloud infrastructure and security, coupled with a strong understanding of distributed systems. The company offers a diverse workplace committed to inclusion, making it a great place for passionate engineers who thrive in a dynamic environment.

Qualifications

• 5+ years of experience in infrastructure or security engineering.
• Deep experience with cloud providers like AWS, GCP, or Azure.
• Strong knowledge of cloud networking concepts such as VPCs.

Responsibilities

• Design and build secure, scalable cloud infrastructure.
• Implement network segmentation and zero-trust principles.
• Establish infrastructure-as-code standards and automation best practices.

Skills

Cloud infrastructure

Security engineering

Distributed systems

Infrastructure-as-Code tools

Cloud networking concepts

IAM and RBAC

Tools

Terraform

Pulumi

CloudFormation

Job description

About Antithesis

We’re on a mission to redefine how modern distributed systems are tested and released. Our platform is trusted by engineering teams who demand rock-solid reliability, scalable performance, and deep technical visibility. Our platform doesn’t just assure system correctness and reliability, it exists because developers need something better. If you’ve ever experienced the pain of a production outage, had a bad week on-call, or had a release delayed by weeks because of one killer bug – you’ll understand exactly why we’re doing what we do. If you're passionate about developer-first products, system resilience, and correctness, we’d love to talk.

About the Role

Antithesis is growing and seeking an experienced Infrastructure & Security Engineer to join our Platform team, which owns the infrastructure, services and tools used to build, deploy and operate the Antithesis services & products. We strive to act as a productivity accelerator by providing secure, scalable infrastructure primitives that enable engineering teams to move fast without compromising security or reliability.

In this role, you will design, build, and scale secure cloud infrastructure that powers Antithesis’ core systems and customer environments. You’ll operate at the intersection of infrastructure, security, and reliability—ensuring our cloud environments are resilient, isolated, observable, and secure by default.

As our systems grow in complexity and scale, the security and isolation of our cloud infrastructure become increasingly critical. You’ll help define and implement the technical foundations that protect our systems, customers, and data.

What You’ll Do

Cloud Infrastructure & Architecture

• Design, build, and operate secure, scalable cloud infrastructure across compute, networking, and storage

• Architect multi-tenant and isolated cloud environments with strong security boundaries

• Lead capacity planning and scaling initiatives to support rapid product and customer growth

• Make critical architectural decisions balancing performance, cost, reliability, and security
  

Network Security & Isolation

• Design and implement network segmentation, private networking, and zero-trust principles

• Build and maintain secure VPC architectures, ingress/egress controls, and service-to-service communication policies

• Implement tenant isolation strategies across infrastructure and workloads

• Conduct threat modeling and proactively reduce infrastructure attack surface
  

Identity, Access & Data Security

• Build and maintain authentication and authorization frameworks across internal systems

• Implement audit logging, access monitoring, and compliance-aligned controls

• Manage secrets, key management systems, and secure credential workflows
  

Automation & Platform Enablement

• Establish infrastructure-as-code standards and automation best practices

• Build tooling and paved paths that improve developer productivity and security posture

• Contribute to long-term infrastructure roadmap and technical strategy

• Mentor engineers on infrastructure and security best practices
  

What We’re Looking For

We’re looking for engineers who thrive at the intersection of cloud infrastructure, security engineering, and distributed systems.

You likely have:

• 5+ years of experience in infrastructure, platform, or security engineering

• Deep experience with cloud providers (AWS, GCP, or Azure)

• Strong knowledge of cloud networking concepts (VPCs, subnets, routing, firewalls, load balancing)

• Experience implementing IAM, RBAC, and least-privilege access models at scale

• Hands‑on experience with Infrastructure-as-Code tools (Terraform, Pulumi, CloudFormation, etc.)

• Experience designing highly available, fault‑tolerant systems

• Understanding of security best practices across cloud infrastructure
  

Bonus if you have:

• Experience in high‑growth or multi‑tenant SaaS environments

• Background in security engineering or compliance frameworks (SOC 2, ISO 27001, etc.)

• Experience with secrets management, KMS, or certificate management

• Experience implementing monitoring and observability systems

Equal Opportunity Statement

We are an equal opportunity employer and value a diverse, inclusive workplace. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, gender identity or expression, age, marital or veteran status, pregnancy, disability, or any other protected characteristic. We are committed to providing reasonable accommodations throughout the application and employment process.