Staff Infrastructure & Performance EngineerAs a Staff Infrastructure Performance & Engineer, you will own and evolve the performance, reliability, and scalability of Nash’s core infrastructure. You’ll work directly with the Engineering Leadership team, platform, and product engineering teams to design and operate low-latency, business-critical systems that power real-time logistics for some of the largest retailers in the world.This is a senior, high-impact role focused on elastic capacity, high availability, cloud-native architectures, Postgres performance, and enterprise-grade CI/CD and multi-region deployments. You will set technical direction, define best practices, and deploy systems for the largest retailers in the world powering their business critical workflows.ResponsibilitiesOwn infrastructure performance and reliability across Nash’s production systems, with a focus on low latency, high throughput, and predictable behavior under load.Design, build, and optimize AWS-based infrastructure, leveraging managed services with a strong emphasis on ECS/Fargate.Lead Postgres performance engineering, including query optimization, indexing strategies, connection management, replication, cluster design, and failover.Architect and operate multi-region, highly availability systems with strong resiliency, disaster recovery, and failover guarantees.Design and evolve enterprise-grade CI/CD pipelines that support safe, repeatable, and fast deployments across environments and regions.Drive observability standards (metrics, logs, tracing, SLOs) and use data to proactively identify and eliminate performance bottlenecks.Partner with application engineers to influence system design decisions that impact scalability, latency, and reliability.Lead incident response and postmortems, focusing on root cause analysis, systemic fixes, and long-term resilience.Set infrastructure and performance best practices and mentor engineers across the organization.Requirements6+ years of experience building and operating high-scale, production infrastructure for business-critical systems.Deep expertise in AWS, including networking, compute, storage, and managed services.Hands-on experience running production workloads on ECS/Fargate at scale.Strong background in Postgres, including performance tuning, replication, high availability, and operational excellence.Proven experience designing and operating multi-region architectures with strict uptime and reliability requirements.Strong understanding of CI/CD for enterprise deployments, including rollout strategies, environment isolation, and rollback safety.Experience building low-latency systems where milliseconds matter.Excellent debugging and systems-level problem-solving skills.Ability to operate autonomously and lead technical initiatives in a fast-paced startup environment.More about Nash.AINash is building the logistics infrastructure for the internetLast mile is a $500B industry powering digital commerce but managed largely with self managed API integrations. Nash approaches last mile orchestration with information completeness solutions from checkout, courier management, customer engagement, and post-purchase experience. Doing this enables merchants and customers to capture immense efficiencies, drive better customer experience, reliability and business outcomes.We are working towards a mission of processing a double digit percentage of every physical last-mile transaction. We achieve this by providing top of the market modules for each step of the customer journey and leveraging the network effects from having more information that allows traditional competitors to collaborate. It’s a big mission, but we are already seeing strong market pull as we are already serving some of the largest retailers in the world like Walmart, 7-Eleven and Woolworths.Nash was founded in 2021 by Mahmoud Ghulman (2x Founder, MIT) and Aziz Alghunaim (2x Founder, 2x YC, Ex-Palantir, MIT) and has raised funding from top investors, including Y-Combinator and a16z, to build the world’s best logistics infrastructure platform. We are based in SF.What You’ll Love About Us✅ Early-stage, well-funded startup – directly impact the company and grow your career!✅ Quarterly broader team on-sites to bond with teammates✅ Competitive compensation and opportunity for equity✅ Flexible paid time off✅ Health, dental, and vision insurance