Backend Engineer

Backend EngineerWe're hiring backend engineers from early career to Staff levels. You'll build and operate the services behind Opsin's security platform, with scope and ownership calibrated to your experience. You'll work across our platform and data plane, turning customer needs into reliable APIs, data workflows, and risk insights. You'll take work end to end — from design and implementation through testing, deployment, observability, and production support — and help us keep the product fast, secure, and dependable as we grow.Your Experience & SkillsMust-haves3+ years building and operating production backend software (we'll level based on experience)Strong system design skills — the key capability for this role — alongside backend fundamentals in APIs, data modeling, SQL, and cloud-based systemsExperience owning software through delivery and production supportA practical approach to testing, reliability, performance, and secure system designHelpful experienceBuilding data-intensive or enterprise softwareTypeScript, NestJS, Python, PostgreSQL, or similar technologiesCloud infrastructure, especially Azure, and modern CI/CD and observability practicesCybersecurity, data security, identity, permissions, or AI systemsUsing AI coding tools thoughtfully as a high leverage part of your engineering workflowYou don't need to match every preferred qualification to apply. We'll calibrate scope and level during the process.Mindset & FitCustomer-focused: You care about solving real customer problems and use feedback to improve the product.Analytical and pragmatic: You make decisions with evidence, choose the simplest sound solution, and avoid unnecessary complexity.Fast, thoughtful execution: You like learning by shipping, iterating, and taking responsibility for outcomes.Low ego, high collaboration: You communicate directly, welcome feedback, and help teammates succeed.Comfortable with startup ambiguity: You can adapt as priorities shift and contribute wherever the team needs you.Why Join Us?Ownership and growth: Drive problems end to end and learn in a high velocity environment.Frontier technology: Technically challenging work that both leverages and secures the latest advancements in AI.Early stage opportunity: Make a real impact and have meaningful equity in the outcome.Category defining cybersecurity: AI is a new kind of security challenge; be part of shaping how it's solved.About OpsinOpsin makes AI safe to use across the enterprise. Its agentless, API-native Risk Graph connects identity, permissions, data, and AI agent activity, helping enterprises identify risky agents, exposed data, and insider risk before they become incidents. More than 20 enterprises, including Fortune 500 companies, trust Opsin. Backed by top-tier VCs Race Capital and SYN Ventures, we're building the security layer that enables organizations to put AI to work safely and with appropriate governance. Employment Type Full-Time Location San Francisco / San Jose. Hybrid: we work together in person two to three days a week. Compensation & BenefitsAnnual base salary of $175K–$250K, depending on level and qualifications, plus a meaningful early-stage equity grant and comprehensive benefits through Justworks PEO.The compensation package offered depends on factors including skills, experience, location, and education, and the level at which the candidate is hired.Opsin Security is an equal opportunity employer. We consider all applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, national origin, ancestry, age, disability, marital status, medical condition, genetic information, military or veteran status, or any other characteristic protected by applicable law.