Rackner builds cutting-edge solutions that apply DevSecOps and the power of AI in the datacenter, public and private clouds, and edge, leveraging the future of compute capability and technologies like Kubernetes (k8s) and WebAssembly (WASM).We're a member of the Cloud Native Computing Foundation and a Kubernetes Certified Service Provider - as well as a partner to the major public cloud companies.Our customers include hypergrowth startups and federal agencies, both Civilian and Defense.

Rackner

Technical Lead / Lead Engineer (Federal Health | Remote | Secret Clearance)

Senior Program Manager – Federal Health & Client Delivery (Remote)

Project Manager (Remote | Federal Health)

Business Development & Capture Lead (DoD Domain | Remote)

Data Engineer (DoD Secret | Remote)

DevSecOps Engineer (DoD Secret | Hybrid)

Software Engineer (DoD Secret | Hybrid)

Computer Science Internship

This role is for a Technical Lead / Lead Engineer to support a federal health mission, focusing on modern, secure, and scalable technology. It's for experienced engineers who want to stay technical while leading teams, shaping execution, and ensuring alignment with mission priorities. You will guide design, implementation, and delivery planning, collaborating with various partners to manage dependencies and risks. The role requires comfort in cloud-native, DevSecOps, data, or security-focused environments, fostering accountability and continuous improvement. It offers the opportunity to lead meaningful work directly impacting national health outcomes in a remote-first setting, promoting professional growth through technical leadership and exposure to complex systems.

Technical Lead / Lead EngineerRemote (U.S.) | Full-TimeActive Secret Clearance Required<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">About the Role</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">We’re seeking a Technical Lead / Lead Engineer to support a federal health–aligned mission focused on modern, secure, and scalable technology delivery. This role is designed for experienced engineers who enjoy staying close to the technical work while also leading teams, shaping execution, and ensuring delivery stays aligned with mission priorities.</li><li class="leading-relaxed">This is not a purely managerial role. You’ll lead from the work — guiding engineers, influencing technical decisions, and helping teams navigate complexity with clarity and confidence.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">What You’ll Do</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Serve as a technical leader within cross-functional engineering teams, helping translate mission needs into executable technical plans. You’ll guide design and implementation decisions, support delivery planning, and ensure work is executed in a disciplined, secure, and scalable way.</li><li class="leading-relaxed">Collaborate closely with engineers, architects, operations, and delivery partners to manage dependencies, surface risks early, and keep technical execution aligned with timelines and objectives. You’ll mentor team members, help unblock challenges, and contribute to a culture of accountability, quality, and continuous improvement.</li><li class="leading-relaxed">This role requires comfort operating in cloud-native, DevSecOps, data, or security-focused environments where priorities evolve and leadership is demonstrated through action.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">What This Role Offers You</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">The opportunity to lead meaningful technical work that directly supports national health outcomes.</li><li class="leading-relaxed">Work in a remote-first environment that values trust, clarity, and steady execution over unnecessary process.</li><li class="leading-relaxed">Professional growth through technical leadership, exposure to complex mission-driven systems, and the ability to influence how modern platforms are built and delivered.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Required Qualifications</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Bachelor’s degree in Computer Science, Engineering, Information Technology, or a related field.</li><li class="leading-relaxed">Hands-on experience as a software engineer, platform engineer, cloud engineer, or systems engineer.</li><li class="leading-relaxed">Leading or mentoring engineers within delivery teams.</li><li class="leading-relaxed">Ability to collaborate across engineering, operations, and mission stakeholders.</li><li class="leading-relaxed">Strong communication skills and comfort explaining technical decisions to non-technical audiences.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Preferred Qualifications</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Senior-level engineering experience with leadership responsibilities.</li><li class="leading-relaxed">Experience in cloud, DevSecOps, platform engineering, data engineering, or cybersecurity environments.</li><li class="leading-relaxed">Supporting federal health or public-sector modernization efforts.</li><li class="leading-relaxed">Familiarity with Agile, Scrum, or hybrid delivery models.</li><li class="leading-relaxed">Leading distributed or remote technical teams.</li><li class="leading-relaxed">Architecture, cloud, or security certifications are a plus.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Why You’ll Love Working Here:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Remote-first flexibility</li><li class="leading-relaxed">Weekly pay</li><li class="leading-relaxed">Comprehensive benefits including medical, dental, vision, PTO, and 401(k) with 100% match up to 6%</li><li class="leading-relaxed">Paid training and certification support</li><li class="leading-relaxed">A collaborative, mission-driven culture focused on impact and growth</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Next Steps:</h3>If you’re an experienced engineer with an active Secret clearance who’s ready to step into a technical leadership role supporting meaningful mission outcomes, we’d love to connect.#TechnicalLead #LeadEngineer #ClearedJobs #SecretClearance #FederalHealth #DevSecOps #CloudEngineering #MissionDrivenWork #RemoteJobs

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CloudLinux

Senior/Staff Engineer (Python Developer)

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Principal Frontend Engineer

CloudLinux is seeking a Senior/Staff Engineer (Python Developer) to join their remote-first engineering team. This role involves optimizing web performance, handling web server configurations (Nginx, Apache, LiteSpeed), and enhancing CloudLinux core features like LVE, MySQL Governor, and CageFS. The ideal candidate will provide technical leadership, drive architectural vision, and contribute to system-level solutions, focusing on performance, security, and resource management.

CloudLinux is on a mission to make Linux secure, stable, and profitable. We have spent more than 500 combined years working on Linux, and are changing how hosting companies and data centers use this technology we love by bringing it to millions of their customers. With more than 500,000 product installations and 4,000 customers, including Liquid Web, 1&amp;1, and Dell, CloudLinux combines in-depth technical knowledge of hosting, kernel development, and open source with unique client care expertise.

Staff Engineer, ELS Automation (Product Owner)

Support Engineer with a strong focus on security

Lead Security Operations Engineer

Lead Application Security Engineer / DevSecOps Engineer

Kernel Build Engineer Interns

Staff Engineer

Java Security Researcher

Lead Data Platform Engineer

R&D Engineer

Description-----------CloudLinux is a global remote-first company. We are driven by our principles: Do the right thing, employees first, we are remote first, and we deliver high volume, low-cost Linux infrastructure and security products that help companies to increase the efficiency of their operations. Every person on our team supports each other and does what we can to ensure we are all successful.CloudLinuxOS, our flagship product, runs on over 80,000 production servers today, powering over 50 million websites, and is recognized as the best OS for security and efficiency in a shared hosting environment. CloudLinuxOS increases server density and enhances security, thus reducing operating costs, decreasing churn rates, and increasing profitability.Check out our website for more information: <a href="https://www.cloudlinux.com/" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">https://www.cloudlinux.com/</a>We are seeking a talented Senior/Staff Engineer (Python Developer) to join our engineering team. You will work on both web optimization (web server performance, request handling, web infrastructure) and CloudLinux core features optimization related to resource limitation (LVE - Lightweight Virtual Environment, MySQL Governor) and isolation and protection of file system (CageFS), providing technical leadership across multiple optimization domains.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Key qualities we're looking for:</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Product and architectural visionary - ability to see the big picture and drive product direction through technical excellence.</li><li class="leading-relaxed">Game changer - can take initiative and make proposals that change solutions and technical direction.</li><li class="leading-relaxed">Universal engineer - versatile and adaptable, comfortable working across different domains and technologies.</li><li class="leading-relaxed">High initiative - proactive in identifying opportunities and driving improvements.</li><li class="leading-relaxed">High performance - consistently delivers exceptional results and exceeds expectations.</li><li class="leading-relaxed">Advanced algorithmic optimization - ability to design and implement alternative, more efficient algorithmic approaches to solve complex technical problems.</li><li class="leading-relaxed">Adept at using AI - leverages modern AI tools and techniques to enhance productivity and solutions.</li><li class="leading-relaxed">Results-driven and goal-oriented - focused on delivering measurable impact and achieving strategic objectives.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Responsibilities</h3>Web Optimization:<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Optimizing web performance - developing and implementing solutions to improve web server performance, request handling, and overall system efficiency, using benchmarking and measurements to validate improvements.</li><li class="leading-relaxed">Working with web servers - configuring, optimizing, and extending Nginx, Apache, and LiteSpeed.</li><li class="leading-relaxed">Optimizing PHP handlers and web request processing - analyzing and enhancing the performance of different PHP handlers and data transfer mechanisms for processing incoming web requests.</li><li class="leading-relaxed">Architecting web infrastructure - designing scalable, high-performance web systems and infrastructure solutions.</li><li class="leading-relaxed">Ensuring web security - implementing security measures to protect against web attacks and strengthen web server security in production environments.</li><li class="leading-relaxed">Database optimization - working with MySQL and MariaDB to optimize queries, improve performance, and ensure reliable database administration for web applications.</li></ul>CloudLinux Core Features Optimization:<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Maintaining and enhancing LVE (Lightweight Virtual Environment) - working on resource limits, CPU throttling, memory limits, I/O limits, and other LVE-related features.</li><li class="leading-relaxed">Maintaining and enhancing MySQL Governor - working on database resource limitation and optimization.</li><li class="leading-relaxed">Maintaining and enhancing CageFS - working on file system isolation, user isolation mechanisms, and security boundaries.</li><li class="leading-relaxed">Developing new features for Limits - designing and implementing new resource limiting mechanisms and improvements to existing limit systems.</li><li class="leading-relaxed">Developing new features for Isolations - creating new isolation technologies and enhancing existing isolation mechanisms for better security and performance.</li><li class="leading-relaxed">Architecting system-level solutions - designing scalable, high-performance system-level solutions for resource management and isolation.</li><li class="leading-relaxed">Working with system internals - deep involvement with Linux system calls and system-level programming.</li></ul>Cross-Cutting Responsibilities:<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Leading technical initiatives - making proposals that change solutions and technical direction across web optimization and CloudLinux core features.</li><li class="leading-relaxed">Optimizing system performance - improving performance through profiling, benchmarking, and algorithmic optimization across both web and system-level domains.</li><li class="leading-relaxed">Making data-driven decisions - using benchmarking, profiling, and measurements to validate technical approaches and prove all technical decisions with concrete data.</li><li class="leading-relaxed">Contributing to upstream solutions - actively participating in open-source projects and contributing improvements to public codebases, upstream codebases.</li><li class="leading-relaxed">Leveraging AI tools - using modern AI tools and techniques to enhance productivity, solve problems, and improve optimization solutions.</li><li class="leading-relaxed">Mentoring and coaching engineers, conducting technical reviews, and establishing engineering best practices.</li><li class="leading-relaxed">Collaborating with cross-functional teams to define technical strategy and roadmaps.</li><li class="leading-relaxed">Troubleshooting complex production issues across web performance, limits, isolations, and system-level functionality, implementing long-term solutions.</li></ul>Requirements------------To thrive in this role, we are looking for someone who has:<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">6+ years of professional software engineering experience in Python;</li><li class="leading-relaxed">Held senior/staff/principal engineering positions in previous roles;</li><li class="leading-relaxed">Strong Python development skills - expert-level proficiency in Python programming for web optimization, tooling, automation, system-level tasks, and web-related tasks;</li><li class="leading-relaxed">Web performance expertise - participation in web performance projects or own solutions for optimizing web performance;</li><li class="leading-relaxed">Web server experience - deep knowledge and experience with Nginx, Apache, and/or LiteSpeed;</li><li class="leading-relaxed">Experience with PHP handlers and web request processing optimization;</li><li class="leading-relaxed">System programming expertise - deep experience with system-level programming and low-level system optimization;</li><li class="leading-relaxed">Linux kernel knowledge - understanding of Linux kernel internals, system calls, and kernel-space concepts (Python bindings and tooling);</li><li class="leading-relaxed">Resource management experience - experience with resource limits, cgroups, namespaces, or similar resource management and isolation technologies;</li><li class="leading-relaxed">Strong Linux proficiency - comprehensive understanding of Linux system administration, internals, kernel architecture, and optimization;</li><li class="leading-relaxed">High level of security knowledge - strong understanding of security basics for web attacks, isolation mechanisms, and Linux security in general;</li><li class="leading-relaxed">Database expertise - solid experience with MySQL and MariaDB, including optimization and administration;</li><li class="leading-relaxed">Data-driven approach - proven ability to use benchmarking and measurements to validate and prove any technical decisions;</li><li class="leading-relaxed">Contributor to public/upstream solutions - experience contributing to open-source projects or upstream codebases;</li><li class="leading-relaxed">Strong understanding of the network stack, particularly TCP/IP and HTTP;</li><li class="leading-relaxed">Architecture and design skills - ability to design systems that are scalable, maintainable, and reliable at both web infrastructure and system levels;</li><li class="leading-relaxed">Technical leadership experience - mentoring engineers, conducting technical reviews, and driving engineering best practices;</li><li class="leading-relaxed">Knowledge of CI/CD pipelines and DevOps practices;</li><li class="leading-relaxed">Excellent communication skills - ability to articulate complex technical concepts to both technical and non-technical audiences;</li><li class="leading-relaxed">Strong collaboration skills and ability to work effectively in a remote, distributed team environment;</li><li class="leading-relaxed">English at an upper-intermediate level or higher.</li></ul>Benefits--------What's in it for you?<ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">A focus on professional development.</li><li class="leading-relaxed">Interesting and challenging projects.</li><li class="leading-relaxed">Fully remote work with flexible working hours, which allows you to schedule your day and work from any location worldwide.</li><li class="leading-relaxed">Paid 24 days of vacation per year, 10 days of national holidays, and unlimited sick leaves.</li><li class="leading-relaxed">Compensation for private medical insurance.</li><li class="leading-relaxed">Co-working and gym/sports reimbursement.</li><li class="leading-relaxed">Budget for education.</li><li class="leading-relaxed">The opportunity to receive a reward for the most innovative idea that the company can patent.</li></ul>By applying for this position, you agree with <a href="https://cloudlinux.com/privacy-policy" target="blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">Cloudlinux Privacy Policy_</a>and give us your consent to maintain and process your personal data with this respect. Please read our Privacy Policy for more information.

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! - This assessment gives us an idea of your problem solving skills using DSA- Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc.- 10 Multiple Choice questions

Data Structures and Algorithms

Let's assess your Programming Patterns! ????- This assessment gives us an idea of your code architecture skills- Companies that evaluate this skillset in interviews: Dirtcube, PTW, Playshifu, etc.

Programming Patterns

Let's assess your OOPs skills! ????- This assessment gives us an idea of your fundamental OOPS concepts and Solid principles skills- Companies that evaluate this skillset in interviews: Hitwicket, GSN Games, Tomo Club, etc.

Object Oriented Programming

Let's assess your Unity Skills ????- This assessment gives us an idea of your Unity fundamentals- Companies you can apply for after taking this assessment: Godspeed games, Salvation Games, nCore Games, etc.