Member of Technical Staff - Platform Foundations

About the Role

Build and operate a company-wide foundations platform that accelerates every team by providing reliable, scalable developer infrastructure, SRE capabilities, and high-throughput data ingestion tooling enabling Reflection to move faster as we scale.

This team is responsible for the foundational platform layer that every engineering team depends on. You will define opinionated golden paths for cloud infrastructure, networking, and access patterns so the safe and scalable path is also the easiest to follow. Work spans cloud infrastructure, network primitives, security guardrails, and developer tooling to ensure engineers can ship quickly without sacrificing reliability, security, or cost predictability.

Responsibilities

• Define and maintain golden paths for cloud projects, networking, and access patterns.
• Ship secure defaults and guardrails that make the safe path the easy path.
• Build and operate core networking primitives including routing, DNS, load balancing, and connectivity.
• Establish baseline observability and operational hygiene across services and infrastructure.
• Own developer infrastructure such as build systems, CI/CD, caching, and test infrastructure to keep engineers shipping fast.
• Drive cloud cost visibility and reduction through tooling, guardrails, and optimization without slowing teams down.

Technologies You'll Work With

• Cloud & Multi-Cloud Architecture: GCP, AWS, multi-cloud design, VPC architecture, private DNS, load balancers, advanced routing (BGP), large-scale Kubernetes clusters, control plane scaling.
• Identity & Security Foundations: IAM, OIDC, RBAC, KMS, secrets management, policy-as-code (OPA, Gatekeeper), secure defaults, cloud guardrails.
• Infrastructure & Automation: Terraform, Pulumi, Kubernetes foundations, CI/CD systems, Bazel, build caching, hermetic builds.
• Observability & Cost Governance: Prometheus, Grafana, OpenTelemetry, logging and metrics systems, FinOps, cloud cost optimization.

Qualifications

• Strong infrastructure or platform engineering background with experience shipping production-grade systems.
• Deep expertise in at least one of: cloud platforms, network engineering, security architecture, or developer tooling — with working knowledge across the others.
• Comfortable navigating complex multi-team environments, debugging hard infrastructure problems, and building for reliability and scale.
• Thrive in a high-agency, fast-paced environment; bias toward action and impact.
• Excited about zero to one challenges — building new systems rather than maintaining legacy ones.
• Collaborative, clear communicator, comfortable working across research and infrastructure boundaries.
• Motivated by creating the secure, self-serve foundation that the world's most capable open-weight AI systems are built on.

Benefits

• Top-tier compensation: Salary and equity structured to recognize and retain our talent globally.
• Stock options: Everyone who joins and contributes to Reflection's success gets to share in the upside through stock options.
• Health & wellness: Comprehensive medical, dental, vision, and life insurance, with an annual wellness allowance.
• Meals: Lunch and dinner provided in the office daily.
• Life & family: 22 weeks paid parental leave for all new birthing and non-birthing parents, including adoptive and surrogate journeys.
• Vacation days: Unlimited paid time off in the U.S. and 30 days in the U.K.
• Sponsorship support: Visa sponsorship for exceptional talent and support for long-term immigration pathways where applicable.
• Team building: Regular off-sites, happy hours, and team celebrations.

This position may require access to technology or source code subject to U.S. Export Administration Regulations.