Platform Infrastructure Engineer

What you'll do

• 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
• Flexible work arrangements
• Direct impact on company direction and technical decisions
• High ownership and the opportunity to make a career-defining impact
• Visa sponsorship

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.