Senior Software Engineer (Platform & Infrastructure)

About Simbian 

Simbian® is building an Agentic AI platform for cybersecurity. Founded by repeat successful security founders, we have gathered an excellent cohort of employees, partners, and customers. 

Our mission is to solve security using AI and our core values are excellence, replication, and intellectual honesty. Our promise is to make Simbian the best workplace of your career, and we believe a small group of thoughtful, passionate people can make all the positive differences in the world. 

Our AI Agents automate security operations and provide our customers with 10x leverage. Our customers include some of the world’s largest companies. 

Our initial use cases include: 

AI-based SOC alert triage and investigation 

AI-based Threat Hunting 

AI-based Penetration Testing 

Role — Senior Software Engineer (Platform & Infrastructure) 

You will design and build the foundational infrastructure powering our agentic security platform — secure multi-tenant systems, distributed services, scalable execution layers, and the internal platform capabilities that allow our AI agents to operate reliably in production environments. 

You’ll work closely with founders, product, AI, and security engineering teams to build systems that are secure, observable, resilient, and scalable from day one. 

This role is ideal for engineers who think deeply about distributed systems, platform architecture, reliability, infrastructure, and backend scalability. 

In your first few months, you will: 

Own end-to-end design and delivery of platform capabilities 

Build and scale distributed backend services powering AI agents and customer workflows 

Improve authentication, authorization, and tenant isolation across the platform 

Design infrastructure and observability systems for reliability at scale 

Deploy and operate production-grade systems with strong ownership beyond launch 

Collaborate cross-functionally with engineering, product, customer-facing teams, and leadership to shape platform architecture and engineering standards 

What You’ll Work On 

Platform & Distributed Systems 

Build high-scale, multi-tenant backend systems that securely support multiple customer environments 

Design and operate distributed microservices with strong reliability and fault tolerance 

Build asynchronous execution pipelines, event-driven architectures, and workflow orchestration systems 

Improve scalability, throughput, concurrency, and system performance across services 

Design resilient APIs, service communication patterns, and infrastructure abstractions 

Infrastructure & Reliability Engineering 

Build and maintain cloud-native infrastructure across AWS/Azure 

Improve deployment systems, CI/CD pipelines, container orchestration, and runtime reliability 

Design platform capabilities around monitoring, observability, tracing, logging, and alerting 

Build systems for operational visibility, debugging, incident response, and production diagnostics 

Drive engineering best practices around resiliency, uptime, scalability, and operational excellence 

Security & Access Systems 

Design and implement authentication and authorization systems across services 

Build secure multi-tenant access control systems, RBAC models, and policy enforcement layers 

Improve platform security posture through secure infrastructure and backend design principles 

Work closely with security engineering teams on platform hardening and safe execution models 

AI Infrastructure Enablement 

Build backend infrastructure powering AI agent execution and orchestration 

Design memory retrieval, ingestion, indexing, and context-access systems for agents 

Support scalable evaluation pipelines, traceability, and execution monitoring for AI workflows 

Collaborate with AI engineering teams to improve platform performance and reliability for agent-based systems 

You’ll Thrive Here If You 

Think deeply in systems and architecture 

Enjoy solving ambiguous engineering problems from first principles 

Care about reliability, maintainability, scalability, and elegant abstractions 

Like owning systems end-to-end, including production operations 

Enjoy building infrastructure that other engineers depend on 

Understand the tradeoffs involved in distributed systems and platform design 

Enjoy reading RFCs, architecture docs, and learning new technologies 

Requirements

Must Have 

6+ years of strong backend or platform engineering experience 

Strong understanding of distributed systems fundamentals 

Experience designing and operating microservices at scale 

Experience with authentication and authorization systems (OAuth, RBAC, JWT, SSO, IAM, etc.) 

Strong knowledge of cloud infrastructure (AWS/GCP/Azure), containers, and CI/CD systems 

Experience with observability tooling, monitoring systems, logging, tracing, and production debugging 

Familiarity with asynchronous systems, queues, event streams, and workflow orchestration 

Strong coding experience in Python, Go, Java, or Node.js 

Ownership mindset — ability to take systems from concept → production → scale 

Bonus / Great to Have 

Experience working on platform engineering or internal developer platforms 

Experience with Kubernetes, Kafka, OpenTelemetry, Prometheus, Grafana, or similar tooling 

Experience building multi-tenant SaaS platforms