Full Stack Engineer (Backend Heavy)

About Us Simbian® is building 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 difference in the world. To fuel our fast growth, we are seeking an exceptional candidate who shares our core values of excellence (being the world's best at our craft), replication (share your best ideas with others), and intellectual honesty (tell the truth even if it's bitter). Our AI Agents automate security operations and provide our customers 10x leverage. Our customers include some of the world's largest companies. Our initial use cases include: SOC alert triage and investigation Prioritization and classification of vulnerabilities AI based threat hunting Job Description You will design and build foundational pieces of our agentic security platform, from AI agents that investigate real incidents to the distributed systems that keep them fast, safe, and reliable for dozens of security teams. You’ll work closely with founders, product, and security experts to turn messy real‑world Security operations like SOC, ThreatHunt, Pentest, Security device management etc. into elegant, scalable product experiences. You may own one vertical deeply or work across several in the same project when needed. In your first few months, you will: • Own end-to-end design & delivery of features you take up • Ship platform, agent, or integration capabilities at high velocity • Collaborate not just with product & engineering leaders, but also sales, marketing, and customer-facing teams to shape what we build and why • Deploy features into live production environments, with ownership beyond delivery — including monitoring, stability, and iteration post-launch What You’ll Work On Your work may include: AI + Agent Systems • Building agents for SecOps → Develop autonomous agents that investigate alerts, triage threats, respond, and close cases with minimal human input. • Designing tool schemas, workflows, memory stores for agents → Define structured tool interfaces, execution paths, and long-term memory for reasoning across tasks. • LangGraph based flows for agents (or another agentic framework) → Build multi step agent workflows with branching logic, retries, validation, and conditional tool calling. • Safe-execution loops with guardrails, policy layers, and approvals → Ensure agents operate within risk boundaries using policy controls and human-review checkpoints. Platform & Architecture • Building high-scale, multi-tenant backend systems→ Architect services that securely support many customer environments in parallel without resource collisions. • Designing ingestion, indexing & agent memory retrieval layers → Build pipelines that ingest customer security data, store it as agent-accessible memory, and retrieve relevant context instantly. • Implementing evaluation pipelines & scoring frameworks for agents → Measure agent quality using scoring metrics, test harnesses, regressions, and continuous feedback signals. • Distributed execution, traceability, observability & data quality → Enable high volume workloads with strong logging, metrics, monitoring, and correctness guarantees. Security & Product Engineering • Real-time incident lifecycle automation end-to-end → Automate detection → enrichment → investigation → response with minimal human touch. • Attack simulation & golden dataset creation → Generate controlled attack scenarios to evaluate agents and build benchmark datasets for continuous improvement. • SIEM, SOAR, EDR, NDR style integrations → Integrate with enterprise security products, ingest telemetry, push remediation actions, and unify signals across the stack. This is a place where engineers ship, own, iterate, observe, and improve. Requirements You’ll Thrive Here If You • Think in systems • Like solving undefined problems, not following tickets • Understand distributed systems + AI fundamentals deeply • Enjoy reading RFCs, research papers & learning new tech Must Have • Strong backend development experience (Python/Go/Node preferred) • Solid understanding of distributed systems fundamentals • Experience with microservices, async execution, event streams • Familiarity with cloud infra (AWS/GCP/Azure), containers, CI/CD • Ownership mindset — ability to take a problem from zero → shipped Bonus / Great to Have • Worked on SIEM, SOAR, EDR platforms OR cyber security data pipelines • Knowledge of RAG, vector DBs, embeddings, Eval frameworks • LangChain / LangGraph / agent implementations • Obsessed with writing clean tests, docs, and elegant abstractions PS: WE ARE VERY PARTICULAR ABOUT YOUR PEDIGREE. WE WILL PREFER IF YOU HAVE STUDIED FROM IIT'S, BIT'S, VIT, AND NIT Benefits Why Join Us? • Build an AI-first SOC platform from scratch • Work directly with founders/leaders on architecture, product direction. • Ship fast, learn fast, own deeply • Be there early — where impact compounds