Senior Backend Engineer, Defensive Agent

🕒 4 dias atrás

🇺🇸 Estados Unidos – Remoto (EUA)

💵 $199.000 - $235.000 / ano

⏰ Tempo Integral

🟠 Sênior

🔙 Engenheiro Backend

👻 Score fantasma 20%

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🗣️🇺🇸🇬🇧 Inglês obrigatório

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Horizon3.ai

51 - 200 funcionários

Fundada em 2019

🔒 Cibersegurança

🤖 Inteligência Artificial

☁️ SaaS

Cybersecurity • Artificial Intelligence • SaaS

A plataforma NodeZero™ capacita sua organização a continuamente encontrar, corrigir e verificar sua superfície de ataque explorável. Reduza seu risco de segurança ao encontrar autonomamente fraquezas em sua rede, sabendo como priorizá-las e corrigi-las, e verificando imediatamente se suas correções funcionam. O NodeZero oferece pentests autônomos seguros para produção e outras operações de avaliação chave que escalam através de seus maiores ambientes internos, externos, em nuvem e em nuvem híbrida. Sem necessidade de agentes, sem código para escrever e sem consultores para contratar. Somos uma fusão de ex-operadores cibernéticos das Operações Especiais dos EUA, engenheiros de startups e praticantes de cibersegurança anteriormente frustrados. Estamos comprometidos em ajudar a resolver nossos problemas comuns de segurança: ferramentas de segurança ineficazes, falsos positivos resultando em fadiga de alerta, pontos cegos, cultura de segurança "para cumprir tabela", escassez de habilidades em cibersegurança e o longo tempo e custo de contratar consultores externos.

Descrição

• Build and own the agent execution runtime with durable, resumable, long-running workflows, checkpointing, idempotent steps, cancellation, and step- and run-level timeouts • Design and implement the agent tool layer with registry versioning, schema validation, per-tenant enablement, and server-side authorization • Build the connector framework for third-party security control planes, including EDR, firewalls, identity, SIEM, and cloud IAM • Implement the safe-change pipeline with dry runs, simulation, blast-radius classification, approval gates, staged rollout, rollback, and immutable per-tenant audit trails • Extend tenant isolation for agents taking write actions, including execution boundaries, egress control, quotas, and prevention of cross-tenant leakage • Develop ETL and GraphQL product features for data processing and retrieval supporting agent context, run history, and remediation state • Build ETL pipelines that convert pentest and remediation outcomes into datasets for research training and evaluation • Instrument agent runs with distributed tracing, per-tenant cost and token accounting, and tooling to explain agent behavior • Partner with AI researchers, attack engineers, and product to move capabilities from prototype to production and feed platform constraints into research direction

🎯 Requisitos

• Bachelor's Degree in Computer Science, Computer Engineering or related field • 7+ years professional software engineering experience using modern object-oriented or functional languages such as Python, Go, Scala, C++, or TypeScript • Experience building applications on cloud computing platforms such as AWS, Azure, or GCP • Experience with container technologies such as Docker and Kubernetes • Expert proficiency in SQL • Demonstrated experience designing and operating distributed systems in production, including asynchronous workflows, queues, retries, idempotency, and partial failure • Track record of shipping and operating production services, including on-call ownership • Experience building agentic or LLM-backed systems in production • Experience with a durable execution or workflow engine such as Temporal, or equivalent self-built checkpointing • Experience building multi-tenant platforms with hard isolation requirements, workload identity, and short-lived credential brokering • Experience integrating third-party APIs behind a normalized abstraction • Familiarity with security control planes and their APIs, including EDR, firewalls, SIEM, and cloud IAM • Experience with relational and graph database architectures, including PostgreSQL and Neo4j • Experience building GraphQL backends • Experience with observability tooling such as Datadog, Prometheus, and Grafana, and distributed tracing • Awareness of prompt injection and untrusted-input handling • Authorization to work in the United States is required by the application form

🏖️ Benefícios

• Equity package in the form of stock options for all full-time roles • Health, vision & dental insurance for you and your family • Flexible vacation policy • Generous parental leave • Career development opportunities • Inclusive culture • Collaborative environment • Remote and hybrid work models depending on role and location

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