Senior Site Reliability Engineer, Security

Join CentralReach, a premier provider of innovative software solutions for autism and intellectual and developmental disabilities (IDD) care. With over 200,000 users relying on our technology, we empower therapy providers, educators, and employers to enhance service delivery in Applied Behavior Analysis (ABA) and related therapies with cutting-edge technolog…

Unifonic operates as a remote-first company in the CPaaS sector, providing communication solutions to over 5,000 businesses. With a team of 500, Unifonic supports clients in building stronger customer connections. The Engineering team at Unifonic is responsible for designing, building, and maintaining the systems that power the company’s products. Team members collaborate closely with other departments to ensure technology aligns with customer needs. Creativity and new ideas are encouraged across the group. Role overview The Senior Site Reliability Engineer joins the Production Operations (Live) team. This role centers on ensuring the reliability, scalability, and resilience of Unifonic’s cloud infrastructure and distributed messaging platforms. The SRE team works to keep systems running smoothly at all times and continually seeks ways to improve performance and stability. What you will do Maintain the reliability, uptime, and scalability of key production services around the clock. Participate in the on-call rotation, respond to incidents, troubleshoot live production issues, and lead post-incident reviews. Create and update operational playbooks and escalation paths to help reduce Mean Time to Detect (MTTD) and Mean Time to Resolve (MTTR). Monitor service level objectives (SLOs), conduct chaos testing, plan for capacity, and address reliability risks as they arise.

ABOUT JUUL LABS: At Juul Labs, we are dedicated to revolutionizing the experience of adult smokers by transitioning them away from traditional combustible cigarettes. Our mission is to eliminate their use and prevent underage access to our products. We tackle this global health challenge with a focus on quality, innovation, and research. Supported by prominent technology investors, we aim for excellence not only in our products but also in our talent acquisition. We embrace diversity and are united by our mission. We are seeking the world's best engineers, scientists, designers, product managers, operations experts, and customer service professionals. If you are ready to advance your career with us, we encourage you to explore this opportunity. ROLE OVERVIEW: As a Senior Site Reliability Engineer (SRE), you will take ownership of the operational stability and performance of Juul's hybrid cloud infrastructure (Nutanix, AWS/GCP). Your responsibilities will include leading automation initiatives, ensuring reliability in architecture, and serving as the go-to expert for critical incident escalation to guarantee a scalable and efficient platform. Nutanix Platform Management Responsibilities: Design, deploy, and maintain enterprise-scale Nutanix AHV clusters and manage Prism Central for multi-cluster operations. Exhibit expert-level proficiency with Nutanix CLI (nCLI and acli) for advanced operations and automation. Create automation scripts using Nutanix REST APIs, Python SDK, PowerShell, and Terraform. Manage VM templates, golden images, and standardized deployment catalogs. Design disaster recovery solutions utilizing Leap, Protection Domains, and metro clustering. Implement network micro-segmentation with Nutanix Flow, including RBAC and encryption tactics. Lead Level 3 troubleshooting through advanced diagnostics and log analysis. Configure high availability and optimize performance for critical workloads. Oversee AHV networking with OVS bridges, VLANs, and implement resource reservations. Architect and maintain hybrid cloud solutions across Nutanix HCI, AWS, and GCP environments. Cloud Platform Engineering Responsibilities: Further responsibilities in cloud platform engineering will be communicated during the interview process to ensure alignment with your expertise.

Summary The Wikimedia Foundation is on the lookout for a talented Senior Site Reliability Engineer to enhance and maintain the infrastructure that powers the world’s most beloved encyclopedia, Wikipedia, serving millions globally. Our Site Reliability Engineering (SRE) team is dedicated to ensuring that our globally recognized top-10 website operates smoothly while innovating to further our mission: to empower everyone to share in the sum of all knowledge. As a member of the SRE team, you will join a diverse and globally distributed group of engineers passionate about exploring, experimenting, and adopting new technologies. We believe in transparency, sharing our documentation, code, and configuration as open source. Our production systems are powered entirely by open-source software, and we encourage you to review our work without any login requirements. If you are intrigued by the challenge of improving the reliability and delivery of one of the Internet’s top websites and thrive in a remote-first environment, we invite you to consider joining us.

AI is revolutionizing the operational landscape for businesses, yet many enterprises find themselves hindered in their efforts to effectively implement AI tools, agents, and workflows. At Runlayer, we are dedicated to dismantling these barriers.Our innovative team has developed AI Actions for OpenAI, delivered Zapier Agents to millions, and launched the first remote MCP server in partnership with Anthropic. With the co-creator of MCP on our cap table, we are establishing the essential platform that enterprises need to leverage AI securely and effectively.Runlayer serves as a unified platform for MCPs, Skills, and Agents. We provide purpose-built security, fine-grained governance, and complete observability, enabling organizations to advance their AI initiatives with confidence. With $11M raised from Khosla Ventures and Felicis, we proudly support clients such as Gusto, Instacart, and Opendoor.As a compact team of 25, primarily engineers, we thrive on rapid deployment and innovation. If you aspire to be at the forefront of AI implementation, now is the time to join us.In the role of Site Reliability Engineer, you will be responsible for ensuring the reliability, performance, and scalability of Runlayer's infrastructure as we expand to meet the needs of our enterprise customers across both cloud and on-prem environments.Why You'll Thrive HereImpact: Construct the foundational infrastructure for the enterprise MCP platform, directly facilitating large-scale AI adoption.Excellence: Collaborate closely with founders and a small, experienced engineering team, delivering swiftly in a high-growth setting.Ownership: Take full responsibility for reliability from database performance to incident response and CI/CD pipelines.What You'll DoOversee the reliability and performance of our cloud infrastructure across AWS (ECS, Aurora, CloudWatch) and GCP.Manage and optimize Kubernetes clusters and container orchestration.Lead database reliability engineering efforts, including performance tuning and scaling.Develop and maintain CI/CD pipelines for efficient and secure deployments.Conduct incident response and participate in on-call rotations.Collaborate with product engineers to design scalable and resilient systems.What We're Looking ForProven experience with AWS services including ECS, Aurora, and CloudWatch.Expertise in Kubernetes management and container orchestration.Strong background in database reliability engineering.Solid understanding of CI/CD methodologies and tools.Effective incident response skills and a proactive approach to system reliability.Ability to work collaboratively in a fast-paced environment with a focus on innovation.

Join Zscaler as a Principal Site Reliability Engineer, where you will play a pivotal role in ensuring the reliability and performance of our cutting-edge cloud services. In this position, you will collaborate with cross-functional teams to enhance system uptime, optimize performance, and implement robust monitoring solutions. Your expertise will help shape our operational practices as we continue to innovate in the cybersecurity space.

Join Socure as a Senior Software Engineer specializing in Site Reliability Engineering (SRE) where you will play a pivotal role in ensuring the reliability and performance of our software systems. You will collaborate closely with cross-functional teams to develop robust solutions, implement best practices, and drive automation initiatives that enhance system availability.

Canonical, a trailblazer in open source software and operating systems, empowers the global enterprise and technology landscape with its widely acclaimed Ubuntu platform. This robust platform is instrumental in transformative enterprise initiatives spanning public cloud, data science, artificial intelligence, engineering innovation, and the Internet of Things (IoT). We proudly serve an impressive array of clients, including top-tier public cloud providers, silicon innovators, and industry leaders across various sectors. With a unique approach to global collaboration, our team of over 1,200 professionals is spread across more than 75 countries, with minimal office-based roles. We gather in person two to four times a year in dynamic locations worldwide to synchronize our strategies and execution.As a founder-led, profitable, and rapidly growing organization, we are excited to announce the opening for a Senior Site Reliability Engineer.Your RoleYou will spearhead next-generation operations at scale utilizing pure Python infrastructure as code, covering everything from bare metal to containers and applications. Our mission is to refine enterprise infrastructure DevOps.Our team manages numerous private cloud, Kubernetes, and application clusters for clients across both physical and public cloud environments, continually raising the bar for automation through a universal operator pattern and model-driven operations.To excel in this position, you must view automation as a fundamental software engineering challenge rather than a mere workaround. A passion for a scientific approach to operations at scale, backed by metrics and code, is essential. You should be eager to comprehend the entire technology stack, from bare metal networking and kernel to serverless and open-source applications.

Role overview Calendly is hiring a Senior Site Reliability Engineer to help strengthen the reliability and performance of its platform. This is a fully remote role open to candidates based in the US. What you will do Work closely with teams across engineering, product, and operations to design and maintain scalable systems. Troubleshoot complex technical issues as they arise. Lead root cause analysis to resolve incidents and prevent recurrence. Drive projects that improve system reliability, availability, and performance for a growing user base. Who we’re looking for Experienced engineers with a background in site reliability or related fields. Strong problem-solving skills and a track record of improving system uptime and performance. Comfort working in a collaborative, remote environment.

Why choose Nebius?Nebius is at the forefront of revolutionizing cloud computing to empower the global AI economy. We develop essential tools and resources that enable our clients to tackle real-world problems and innovate across industries—all without incurring substantial infrastructure costs or the necessity of assembling large in-house AI/ML teams. Our team operates at the cutting-edge of AI cloud infrastructure, collaborating with some of the most experienced and innovative leaders and engineers in the industry.Our Work EnvironmentWith our headquarters in Amsterdam and a presence on Nasdaq, Nebius boasts a global footprint with R&D hubs across Europe, North America, and Israel. Our workforce of over 1400 includes more than 400 expert engineers with extensive experience in hardware and software engineering, alongside a dedicated in-house AI R&D team.The RoleYour responsibilities will include:Ensuring fault tolerance, scalability, and uninterrupted operations for our services.Utilizing cutting-edge cloud technology to address various infrastructure challenges.Implementing and enhancing CI/CD processes.We expect you to have:Strong experience with programming languages such as Go, Python, or C++.A solid understanding of classic algorithms and data structures.Commercial experience with and a deep understanding of Unix systems and networking technologies.Experience with containerization and configuration management tools like Ansible, Salt, Terraform, Docker, Kubernetes, and Helm.Bonus points for:A keen interest in backend development.Experience in designing, developing, and managing high-load distributed systems.Commercial experience across various cloud platforms.Coding interviews are part of our hiring process.What we offer:A competitive salary and a comprehensive benefits package.Opportunities for professional advancement within Nebius.Flexible working arrangements.A dynamic, collaborative work environment that fosters initiative and innovation.

Join circleso as a Senior Site Reliability Engineer and be at the forefront of ensuring the reliability, availability, and performance of our cloud-based services. You will work closely with development teams to design, implement, and maintain scalable systems while proactively identifying and resolving issues.

Join Newsela as a Senior Site Reliability Engineer on a contract basis, where you will play a crucial role in enhancing the reliability and performance of our systems. You will collaborate with cross-functional teams to identify areas for improvement and implement robust solutions that will elevate our platform.

P2P.org is a leading institutional staking provider with a total value locked (TVL) of over $10 billion and more than 20% market share in the restaking sector. The team focuses on research and infrastructure development to maximize annual percentage returns (APR) and strengthen security. For example, average net return rates (NRR) at P2P.org exceed the market by 10% for ETH and SOL, and by 20% for DOT. P2P.org is launching new blockchain networks including TON, Avail, Monad, Babylon, Story, and Berachain, alongside yield products and aggregators for stablecoins. The company is the largest operator in restaking by market share. Clients such as BitGo, Copper, Crypto.com, Ledger, ByBit, Bitget, OKX, HTX, Bitvavo, and SBI trust P2P.org for its customer-focused approach and broad product suite, which includes unified APIs, customizable dApps, and widgets. The product portfolio is expanding to include real-world assets (RWA), data solutions, new yield opportunities, and services for banks, exchanges, custodians, and wallets. P2P.org brings together professionals from around the world. The remote team shares a commitment to decentralized finance and works to build a fairer financial system. Team members code, learn, create, and collaborate to shape the future of finance. The company has built a strong reputation and network, keeping customer satisfaction at the center while developing new technologies to advance its brand. Role Overview: Senior Site Reliability Engineer (SRE 3) P2P.org is hiring a Senior Site Reliability Engineer to join the Launch Team. This group is responsible for bringing new blockchain networks into production, from initial design through deployment, stability, observability, and production readiness. The SRE will work at the intersection of infrastructure, protocol engineering, and operations. The goal is to help P2P.org scale to support multiple networks with reliability. What You Will Do Design, build, and operate infrastructure for new blockchain networks Collaborate with protocol, infrastructure, and security teams Oversee network launches from start to finish Ensure solutions are reliable, repeatable, and meet platform standards Location This is a remote role based in the EU.

Role overview Nice Ltd. is seeking a Site Reliability Engineer to join the team remotely from anywhere in the United Kingdom. The primary focus of this position is to enhance the reliability, scalability, and performance of the company’s services. Collaboration is central to the role, as you will work with colleagues across various teams to design, build, and maintain systems that deliver smooth user experiences. What you will do Work with cross-functional teams to develop and maintain dependable systems Automate operational tasks to streamline processes and minimize manual intervention Identify and resolve technical issues that affect infrastructure and services Use both software engineering and systems administration skills to drive ongoing improvements Impact The work in this role directly supports Nice Ltd.’s commitment to delivering reliable, high-quality services to customers each day.

Canonical is on the forefront of open-source software innovation, providing robust operating systems and solutions for enterprises globally. As a Site Reliability Engineer, you'll leverage your expertise to perfect our DevOps practices, enhancing automation and infrastructure efficiency across both private and public cloud environments. You will be crucial in monitoring, incident management, and application quality assurance, ensuring our open-source portfolio meets the highest standards. This is a fully remote position, allowing you to collaborate with a diverse team of experts from around the world.

Canonical is a prominent leader in the open-source software and operating systems arena, catering to enterprise and technology sectors worldwide. Our flagship platform, Ubuntu, serves as a cornerstone for transformative initiatives across public cloud, data science, artificial intelligence, engineering innovation, and the Internet of Things (IoT). We proudly serve renowned public cloud and silicon giants, along with industry frontrunners across various domains. As a pioneer in global distributed collaboration, Canonical boasts a diverse workforce of over 1,200 professionals across more than 75 countries, with minimal office-based roles. Our teams gather in person two to four times a year at captivating locations around the globe to strategize and execute our vision.Founded by industry visionaries, we are a profitable, growth-oriented company.We are seeking a Senior Site Reliability / GitOps Engineer to join our Information Systems (IS) team. This role is designed for an “automation-first” senior technologist with a fervent passion for Linux. You will have the opportunity to shape your career at Canonical while facilitating the success of users leveraging Ubuntu and our suite of open-source products. If you possess a solid background in IT operations automation, Infrastructure as Code, and a genuine enthusiasm for technology, you’ll thrive among some of the brightest minds in the industry at Canonical.

Role Overview Beacon Biosignals is hiring a Site Reliability Engineer. This role focuses on improving the reliability and performance of the company’s systems. The position is open to candidates in Boston, MA or remote locations. What You Will Do Work with teams across engineering, product, and operations to support scalable infrastructure. Design, implement, and maintain systems that prioritize uptime and smooth user experiences. Help ensure high availability for Beacon Biosignals’ platforms and services.

About EngineAt Engine, we are revolutionizing the business travel experience by making it personalized, rewarding, and straightforward. Managing travel and expenses has often felt fragmented and overwhelming, but we are committed to transforming this reality. Our vision is for travel management to be seamless, supported by technology that delights customers at every turn. To achieve this, we are building an integrated platform that combines corporate travel, an innovative charge card, and contemporary spend management tools all in one.To bring this vision to fruition, we seek exceptional, mission-driven individuals to help us redefine travel management for businesses.More than 20,000 companies currently trust Engine to manage over 1 million travelers and billions in annual bookings. We pride ourselves on being cash flow positive with rapid growth, offering exclusive Engine-only rates, industry-leading rewards, and intelligent automation that help businesses save money while providing world-class personalization and convenience.Engine, supported by Telescope Partners, Blackstone, and Permira, has been recognized as one of the fastest-growing travel and fintech platforms in North America, earning accolades such as the Deloitte Fast 500 and Built In’s Best Places to Work.In this role, you will act as a troubleshooting expert and cross-functional collaborator, swiftly resolving supply production issues and ensuring the integrity of our supplier integrations. You will collaborate with Engineering, Product, and Operations teams to conduct quality assurance on integrations, validate solutions, and ensure our supplier connections provide accurate data and reliable functionalities that power our leading business travel platform.

Why Join Nebius?At Nebius, we are pioneering a transformative approach to cloud computing tailored for the global AI economy. Our mission is to equip our clients with innovative tools and resources that address real-world challenges, all while minimizing infrastructure costs and eliminating the need for extensive in-house AI/ML teams. Here, you will collaborate on the forefront of AI cloud infrastructure, working with some of the industry's most talented leaders and engineers.About UsBased in Amsterdam and publicly traded on Nasdaq, Nebius boasts a diverse presence with R&D centers across Europe, North America, and Israel. Our team comprises over 1,400 professionals, including more than 400 highly skilled engineers with profound expertise in hardware and software engineering, complemented by a dedicated in-house AI R&D team.The RoleNebius is currently seeking a Site Reliability Engineer to join our Hardware Infrastructure team. While there is an opportunity to work from our Amsterdam office, this position is also available remotely within the United States.The Hardware Infrastructure team is responsible for designing, developing, and supporting systems integral to the data center lifecycle, including:Functional and load testing systems.Monitoring engineering equipment in our data centers (power supply, air and water cooling, etc.).Monitoring IT equipment: racks, servers, JBODs, JBOGs, power shelves, and network devices.Asset tracking.Managing hardware repair tasks.Server production oversight.Key Responsibilities:Ensure fault tolerance, scalability, and continuous operation of our services.Employ cutting-edge technologies to resolve a variety of infrastructure challenges.Implement and enhance CI/CD processes.Qualifications:Strong proficiency in Linux systems, with expertise in Python and Bash scripting for automation purposes.Proven ability to troubleshoot complex system issues, covering hardware, software, and networking problems.Excellent analytical and problem-solving abilities, with a focus on optimizing system performance.Fluent working proficiency in English.Preferred Qualifications:A keen interest in backend development.Experience in designing, developing, and maintaining hardware infrastructure.

Join PostHog as a Site Reliability Engineer specializing in Infrastructure. In this role, you will be pivotal in ensuring the reliability, performance, and scalability of our systems. You'll collaborate with cross-functional teams to design and implement robust infrastructure solutions that support our growing user base.