Infrastructure Engineer

Flex

Infrastructure Engineer designing and maintaining cloud infrastructure and core systems at Flex. Collaborating across teams to ensure reliability and performance of critical systems.

Posted 5/2/2026full-timeRemote • 🇺🇸 United StatesMid-LevelSenior💰 $160,000 - $220,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudPostgresRustTerraform

About the role

Key responsibilities & impact

Design, build, and operate the cloud infrastructure, databases, and core systems that engineering teams build on
Partner with backend, frontend, and other stakeholders to translate their needs into reliable platform capabilities
Own and improve our cloud infrastructure, databases, and observability stack
Analyze, troubleshoot, and resolve production issues rooted in infrastructure, scaling, and reliability
Collaborate on cross-functional projects that connect the full Flex experience, from consumer checkout to merchant analytics
Create and maintain documentation for infrastructure, platform services, and on-call runbooks
Contribute to a culture of learning, problem-solving, and operational excellence

Requirements

What you’ll need

5+ years of experience building and operating production infrastructure at scale
Hands-on experience with AWS, database operations and tuning (Postgres or similar), and infrastructure as code (Terraform or similar)
Resourceful, curious, and comfortable learning new tools quickly
Thrive in fast-paced, dynamic environments and enjoy wearing multiple hats
Collaborative and enjoy working across teams to solve problems
Execution mindset and always keep the end user in mind
Proficient at leveraging AI tools to ship faster
Experience operating Rust services in production (Nice to Have)
Background in payments, fintech, or health benefits (HSA/FSA), or another regulated, money-moving domain (Nice to Have)

Benefits

Comp & perks

Competitive compensation and equity package
Flexible, remote-friendly work environment

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

cloud infrastructuredatabase operationsinfrastructure as codeAWSPostgresTerraformobservabilityproduction infrastructureAI toolsRust

Soft Skills

collaborativeproblem-solvingexecution mindsetresourcefulcuriousadaptabilitycommunicationcross-functional collaborationlearning culturedynamic environment