Platform Infrastructure Engineer

Take full ownership of NeoSigma's platform infrastructure — lead architectural decisions and design tradeoffs from day one Build and scale core infrastructure across multi-cloud environments (GCP, AWS, Azure) Own CI/CD pipelines and deployment automation end-to-end, with strong rollout, rollback, and environment parity Architect for security from day one: IAM, secrets management, least-privilege access, encryption, and audit logging baked in by default Design and enforce data retention policies — minimal collection, defined TTLs, PII handling — so privacy is structural, not an afterthought Build and maintain observability: structured logging, metrics, alerting, and on-call practices Lead enterprise deployment architecture — design and ship BYOC and VPC-isolated deployments for regulated enterprise customers Own the technical relationship with enterprise customers during deployment: SSO/SAML integration, network configuration, data residency, and compliance documentation (SOC 2, HIPAA, GDPR) Qualifications 2+ years of backend or infrastructure engineering — we look for slope over intercept Shipped real infra at a startup and lived with the consequences Strong fundamentals in multi-cloud infra (GCP, AWS, Azure), Kubernetes, and Terraform Security-first mindset: blast radius, attack surface, audit trails Experience with SQL, object storage, and caching layers for high-throughput workloads Familiarity with enterprise deployment patterns: VPC isolation, BYOC, SSO/SAML/SCIM, compliance surface High ownership mentality — you see problems through to completion and don't wait for someone else to notice what's broken Generalist instincts: comfortable across infra, backend services, data pipelines, and deployment tooling Bachelor's degree in CS, Engineering, or related field (or equivalent practical experience) Genuine interest in AI systems and enthusiasm for building infra that makes agentic products work in production Our Core Values Customer Obsession - We start with the customer and work backwards. We aim to earn trust through consistent delivery, thoughtful listening, and by obsessing over customers. Intellectual Honesty - We operate with high trust and low ego. Ideas matter more than titles, and we communicate openly and directly while assuming good intent, even in strong disagreement. Bias for Action - We set high standards and move quickly to meet them. We prefer building and learning with customers over debating in the abstract, and we iterate based on real feedback. Extreme Ownership - We take responsibility for outcomes, not just tasks. Ownership means seeing problems through to completion and ensuring solutions truly work in practice. Benefits and perks Competitive salary plus meaningful equity package Comprehensive medical benefits and generous PTO Direct impact on company direction and technical decisions High ownership and the opportunity to make a career-defining impact As a founding member, you’ll help define the technical foundation of NeoSigma. Your scope will grow with the company, from owning core systems end-to-end to shaping architecture, hiring, and engineering culture. This role has a natural path toward technical leadership or engineering management as the team scales. About Us NeoSigma is a product-driven research lab building the intelligence layer that helps close the feedback loop between your customers, products, and AI systems. We are a small, intensely technical team of researchers and engineers who have trained frontier-scale models and widely used AI products and agents at MIT, Parallel Web, Essential AI, Apple, and Amazon. #J-18808-Ljbffr