Senior Software Engineer - AWS Cost Optimization

Heartflow is a medical technology company advancing the diagnosis and management of coronary artery disease, the #1 cause of death worldwide, using cutting-edge technology. The flagship product—an AI-driven, non-invasive cardiac test supported by the ACC/AHA Chest Pain Guidelines called the Heartflow FFRCT Analysis—provides a color-coded, 3D model of a patient’s coronary arteries indicating the impact blockages have on blood flow to the heart.

Heartflow is the first AI-driven non-invasive integrated heart care solution across the CCTA pathway that helps clinicians identify stenoses in the coronary arteries (Road Map Analysis ), assess coronary blood flow (FFRCT Analysis), and characterize and quantify coronary atherosclerosis (Plaque Analysis). Our pipeline of products is growing and so is our team; join us in helping to revolutionize precision heartcare.

Heartflow is a publicly traded company (HTFL) that has received international recognition for exceptional strides in healthcare innovation, is supported by medical societies around the world, cleared for use in the US, UK, Europe, Japan and Canada, and has been used for more than 750,000 patients worldwide.  Heartflow is that rare company where massive commercial success meets deep clinical impact. We already have high-revenue, production-grade AI products backed by 15 years of rigorous research.

We are leveraging our deep foundational AI expertise to add serious fuel to our high-growth fire. We are assembling a brand-new, dedicated team to pioneer production-grade Agentic AI systems within healthcare, fundamentally redefining clinical workflows and physician decision-making from the ground up.

About the role(s)
Are you a highly analytical software engineer passionate about building scalable tools, optimizing cloud compute infrastructure, and maximizing ROI? Do you thrive on writing elegant code to solve complex infrastructure, storage, and Fin Ops challenges? Join our dynamic Infrastructure Platform team and help us drive a critical initiative to ensure our modernized Kubernetes workflows and large-scale data systems are as cost-effective as they are powerful.

Job Responsibilities We're looking for a Senior Software Engineer to lead the programmatic effort of managing, forecasting, and radically reducing our cloud spend. This is a hybrid, high-impact role where you will drive our compute cost strategy during our migration to Kubernetes, alongside architecting the transition of our massive data footprint from AWS S3 to highly efficient alternative storage providers.

This role requires deep expertise in backend software engineering, cloud financial modeling, containerized compute architecture, and object storage paradigms.

Architect and execute the large-scale, high-throughput migration of petabytes of data from AWS S3 to lower-cost alternative storage providers (e.g., Backblaze B2). Design, develop, and maintain robust, centralized client libraries (SDKs) to abstract the underlying storage infrastructure, enabling application teams to seamlessly interact with object storage without vendor lock-in.

Partner closely with platform engineers to ensure the reference architectures for moving legacy workloads (AWS Lambda, ECS) to our target EKS clusters are cost-optimized by design. Benchmark migrated services, right-size resource requests/limits, and develop strategies for Reserved Instances (RIs), Savings Plans, and Spot Instance utilization.

Develop, maintain, and refine sophisticated programmatic cloud capacity and spend models. Forecast future infrastructure costs based on our Kubernetes migration roadmap, storage migrations, and traffic patterns, ensuring accurate budgeting and variance analysis in partnership with Finance.

Write custom…