Who we are → About Matter LabsAt Matter Labs, we believe freedom drives progress and prosperity. Our mission is to advance freedom for all — through mass adoption of crypto.To make that real, we’re building ZKsync, a verifiable blockchain network secured by zero‑knowledge proofs. Backed by over $250 million in funding from some of the world’s smartest investors , we move fast, ship often, and judge ourselves by the results we create.More than 20 teams already run or are building custom ZKsync chains on our network, from crypto leaders like Crypto.com, Abstract, and Lens, to global brands such as Deutsche Bank and Xsolla.The Role: Join Matter Labs as a Senior Security Engineer (Infrastructure) and play a critical role in securing the infrastructure that powers zkSync. You’ll work across cloud, application, and systems layers to build and maintain robust defenses. Partnering closely with DevOps, engineering, and protocol security to embed security into everything we ship.This role is ideal for someone who thrives in high-impact environments, enjoys solving complex technical challenges, and is motivated by the mission of protecting open-source and decentralized infrastructure.Key Responsibilities:Infrastructure & Cloud SecurityDesign and implement secure infrastructure; including hardening cloud environments, containers, and CI/CD pipelines.Detection & Response ReadinessHelp build detection and monitoring systems (e.g., SIEM, alerting pipelines) to ensure early threat detection and effective incident response.Secure Systems DesignCollaborate with engineers and DevOps to identify security risks in architecture reviews, system upgrades, and deployment plans.Infrastructure as Code (IaC)Contribute to the design and review of Terraform, Ansible, or similar IaC, ensuring security is embedded from the ground up.Security Reviews & RemediationParticipate in threat modeling, internal audits, and hands-on vulnerability remediation across our stack.Cross-Team CollaborationWork closely with Protocol Security, DevOps, and Product Engineering to align on shared security goals and ensure coverage across the full lifecycle.Optional: On-chain Infra Anomaly DetectionHelp implement tools to detect unusual infrastructure-level activity from on-chain signals (e.g., misuse of credentials or suspicious deployment patterns).What We're Looking For:Strong Infrastructure Security BackgroundHands-on experience securing cloud-native environments (e.g., AWS, GCP), Kubernetes, CI/CD pipelines, and internal systems.Deep Technical FluencyPractical knowledge of threat modeling, incident response, vulnerability management, and systems architecture.IaC & DevSecOps MindsetFamiliarity with Infrastructure as Code (Terraform, etc.), secrets management, and security automation tooling.Bias for ActionA self-starter who’s comfortable with ambiguity and can drive security work through delivery — not just assessment.Collaborative CommunicatorAble to partner across teams, raise risks constructively, and translate complex security concepts to technical and non-technical stakeholders.Web3 Awareness (Nice to Have)Familiarity with the security considerations of decentralized infrastructure and open-source ecosystems. Bonus for knowledge of Ethereum, Solidity, or ZK-related tech.Work model & payRemote‑first: work wherever you’re most effective; optional travel to team or industry events. Ideally East Coast or European time zone.Freedom & ownership culture: no time tracking, minimum bureaucracy—only results matter.For more on how we work, check out our Team Handbook.Benefits snapshotCompetitive compensation, equity, and token packagePremium health, dental, and vision coverage16 weeks paid parental leaveFlexible paid time off plus company‑wide closure weeks$2 000 equipment stipend & $300 monthly co‑working allowance[See full benefits]