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.
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.
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
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
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
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
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
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.
Under no circumstances will Antithesis pay a fee for candidates submitted or presented without a signed recruiting agreement in place between Antithesis and the recruiter or agency prior to submission Any submission must be for a requisition specifically and individually assigned in writing by Antithesis’ People Department.
In the event that candidate(s) are submitted or presented to Antithesis by a recruiter or agency without both a signed agreement and written assignment from Antithesis, Antithesis expressly reserves the right to pursue and hire such candidate(s) without any financial obligation to the recruiter or agency.
Ship confidently and free your engineering team to focus on creating business value. Antithesis enables you to find and eliminate bugs that cause system downtime and difficult-to-fix correctness issues.
Our platform combines AI with advanced testing methodologies to thoroughly explore distributed systems and find the bugs that other tools miss. The platform perfectly reproduces bugs and the conditions that led to them, dramatically reducing the time required to debug systems and enabling engineers to validate fixes with 100% certainty.
Instead of having engineers (or AI) write more test cases, the platform enables property-based testing where you define desired outcomes. Our autonomous AI-powered testing engine explores millions of code paths in parallel and smartly injects the kind of faults your code routinely experiences in hostile production environments. No more testing only the "happy path" and missing the issues that will haunt you in production.
