Linux Systems Engineer

About UsNubank stands as one of the foremost digital financial platforms globally, boasting over 122 million customers across Brazil, Mexico, and Colombia. Driven by our mission to combat complexity and empower individuals, we are on a transformative journey to reshape financial services in Latin America, and this is merely the beginning of the innovative future we are forging.As a publicly traded company on the New York Stock Exchange (NYSE: NU), we integrate proprietary technology, data intelligence, and a streamlined operational model to provide financial products that are intuitive, accessible, and human-centered.Our influence has been acknowledged through prestigious global rankings, including Time 100 Companies, Fast Company’s Most Innovative Companies, and Forbes World’s Best Bank. Explore our career opportunities at https://international.nubank.com.br/careers/About the RoleJoin our Systems Performance Team as a Senior Systems Engineer. This team is an integral part of the Computing Squad (Foundation / Runtime Platforms). You will contribute to developing advanced diagnostic tools and conducting in-depth analyses aimed at minimizing latency, reducing infrastructure costs, and enhancing service efficiency. Your role will involve executing performance assessments and identifying systemic bottlenecks within one of the largest JVM-based microservice architectures globally, collaborating with components ranging from the Linux Kernel to wide-scale cloud orchestration.

Cerebras Systems is revolutionizing AI with the largest AI chip globally, measuring 56 times larger than traditional GPUs. Our innovative wafer-scale architecture delivers the computational power of numerous GPUs on a single chip, combining unparalleled performance with the simplicity of a single device. This unique approach enables Cerebras to provide leading-edge training and inference speeds, allowing machine learning professionals to effortlessly execute large-scale ML applications without the complexities of managing multiple GPUs or TPUs.Cerebras counts among its esteemed clients top-tier model laboratories, major global enterprises, and pioneering AI-native startups. Recently, OpenAI announced a multi-year collaboration with Cerebras, aiming to deploy 750 megawatts of power to transform critical workloads with ultra-high-speed inference.The groundbreaking wafer-scale architecture of Cerebras Inference offers the fastest Generative AI inference solution worldwide, exceeding GPU-based hyperscale cloud inference services by over ten times. This dramatic improvement in speed is reshaping the user experience of AI applications, facilitating real-time iterations and enhancing intelligence through advanced agentic computation.About The RoleJoin Cerebras as a Performance Engineer within our innovative Runtime Team. Our cutting-edge CS-3 system, powered by a network of modern and robust x86 machines, has established new benchmarks in high-performance ML training and inference solutions. Leveraging a chip the size of a dinner plate with 44GB of on-chip memory, this role will challenge and expand your expertise in optimizing AI applications and managing computational workloads primarily on the x86 architecture that supports our Runtime driver.

Cerebras Systems is at the forefront of AI technology, having developed the world's largest AI chip, which is 56 times larger than traditional GPUs. Our revolutionary wafer-scale architecture delivers unparalleled AI compute power equivalent to dozens of GPUs on a single chip, combined with the ease of programming as if it were a single device. This innovative approach enables us to achieve industry-leading training and inference speeds, allowing machine learning practitioners to run extensive ML applications effortlessly, without the complexities associated with managing numerous GPUs or TPUs. Cerebras is trusted by leading model labs, global enterprises, and pioneering AI-native startups. Notably, OpenAI recently announced a multi-year partnership with Cerebras, aimed at deploying 750 megawatts of scale, revolutionizing critical workloads with ultra high-speed inference. Thanks to our groundbreaking wafer-scale architecture, Cerebras Inference offers the fastest Generative AI inference solution globally, exceeding GPU-based hyperscale cloud inference services by more than 10 times. This significant enhancement in speed is redefining the user experience of AI applications, facilitating real-time iterations and amplifying intelligence through enhanced agentic computation.About The RoleAs a member of the inference performance team, you will work at the critical intersection of hardware and software, enhancing end-to-end model inference speed and throughput. Your focus will encompass low-level kernel performance debugging and optimization, system-level performance analysis, performance modeling, and the creation of tools for performance diagnostics and projections.ResponsibilitiesDevelop performance models (kernel-level, end-to-end) to forecast the performance of state-of-the-art and client ML models.Optimize and troubleshoot our kernel micro code and compiler algorithms to enhance ML model inference speed, throughput, and compute utilization on the Cerebras WSE.Analyze and debug runtime performance at the system and cluster level.Create tools and infrastructure to visualize performance data collected from the Wafer Scale Engine and our compute cluster.

About OLIXAt OLIX, we are at the forefront of a technological revolution. The demand for AI is surging faster than any previous technology, leading to a significant gap in infrastructure. Conventional hardware designs have reached their limits, and the industry is in desperate need of innovation. We are pioneering a new era with our Optical Tensor Processing Unit (OTPU), which promises unparalleled performance and energy efficiency that current chips cannot match.The RoleWe are looking for a Senior Performance Modelling Engineer to take ownership of analytical and simulation models that guide the architecture and software development of our OTPU. Your expertise will be vital in creating functional simulators and high-fidelity, cycle-accurate models of our optical computing system. This position is essential for exploring design possibilities and delivering insights that will shape our software, hardware, and optical strategies. Ideal candidates will thrive in a dynamic environment at the intersection of hardware architecture, software tools, and machine-learning workload analysis, with a passion for data-driven decisions and rapid prototyping.ResponsibilitiesProject Ownership: Lead and execute projects within your team's roadmap that unlock critical technical and business milestones essential for OLIX's success.Collaboration: Partner closely with hardware, compiler, and ML framework teams to ensure that models accurately represent reality and meet performance targets.Functional Simulator: Design, develop, and maintain a functional simulator for the OPTU subsystem and its complete pipeline.Performance Simulator: Create and maintain architectural and cycle-accurate models of the OPTU subsystems and pipeline, identifying key throughput, latency, and utilization bottlenecks to propose architectural or scheduling solutions.Workload Analysis & Bottleneck Hunting: Use benchmarks (including LLMs, diffusion, and graph workloads) to gather detailed traces.Design-Space Exploration: Conduct extensive parameter sweeps using your functional models to analyze trade-offs and steer the software, hardware, and optical teams, presenting results in clear, quantitative analyses and design recommendations.

Cerebras Systems is at the forefront of AI innovation, creating the world’s largest AI chip, a staggering 56 times larger than traditional GPUs. Our revolutionary wafer-scale architecture delivers the computational power of dozens of GPUs within a single chip, paired with the simplicity of a unified programming interface. This unique approach enables us to achieve unparalleled training and inference speeds, empowering machine learning practitioners to execute large-scale ML applications effortlessly, without the complexities associated with hundreds of GPUs or TPUs.Among our esteemed clientele are leading model laboratories, global enterprises, and pioneering AI-native startups. Recently, OpenAI announced a multi-year collaboration with Cerebras, aiming to leverage 750 megawatts of scale to revolutionize key workloads through ultra-high-speed inference.Thanks to our groundbreaking wafer-scale architecture, Cerebras Inference provides the fastest Generative AI inference solution available today, boasting speeds over ten times faster than GPU-based hyperscale cloud services. This extraordinary increase in speed is reshaping the user experience of AI applications, enabling real-time iterations and enhancing intelligence through advanced agentic computation.About The RoleJoin our inference model team, dedicated to advancing state-of-the-art models by numerically validating and accelerating innovative concepts on our wafer-scale hardware. In this role, you will prototype architectural enhancements, construct performance evaluation pipelines, and translate quantitative insights into actionable changes that drive production success.Key ResponsibilitiesPrototype and benchmark innovative concepts such as new attention mechanisms, mixture of experts (MoE), speculative decoding, and other emerging advancements.Create agent-driven automation tools that design experiments, schedule runs, triage regressions, and prepare pull requests.Collaborate closely with compiler, runtime, and silicon teams, gaining a unique perspective on the complete software/hardware innovation stack.Stay current with the latest open- and closed-source models; execute them on wafer scale first to identify new optimization opportunities.

We are seeking a highly skilled Senior Application Performance Tester to join our dynamic team at System Canada Technologies. In this role, you will be responsible for evaluating application performance, identifying bottlenecks, and providing actionable insights to enhance system efficiency. Your expertise will be crucial in ensuring our applications meet the highest performance standards and deliver an exceptional user experience.As a Senior Application Performance Tester, you will collaborate with cross-functional teams to design and execute performance tests, analyze results, and recommend improvements. Your analytical skills and attention to detail will play a pivotal role in driving our commitment to quality and performance.

Tenstorrent is looking for a Senior Engineer to focus on system-level design verification at its Toronto office. This role takes the lead in ensuring complex system designs meet quality and reliability standards. The position involves working with engineers from different teams to confirm that products function as intended. Key responsibilities Lead verification activities for both new and existing system designs Work closely with other engineering teams to identify and address design issues Apply and share expertise to enhance verification processes and methodologies Collaboration and impact This position plays a central role in maintaining product quality by coordinating verification work and supporting continuous improvement across engineering functions.

About OLIXAt OLIX, we are pioneering the next technological revolution. The rapid expansion of AI technologies has exposed significant gaps in existing infrastructure, making it imperative to innovate beyond outdated hardware paradigms. Our flagship product, the Optical Tensor Processing Unit (OTPU), redefines performance and energy efficiency, positioning us as leaders in this transformative era.Role Overview:As the Engineering Manager for Performance Modelling, you will spearhead a dedicated team of six engineers tasked with defining and validating OTPU architecture specifications across various generations. You will collaborate extensively with compiler, ASIC, product, and business development teams to ensure alignment between architectural decisions, customer requirements, and software-hardware integration timelines.We seek a dynamic engineering manager with proven experience in leading high-performing teams to achieve significant business outcomes. Your technical acumen and leadership abilities will be key to fostering a collaborative environment that drives innovation and execution.Key Responsibilities:Develop and execute the performance modelling roadmap at OLIX, ensuring alignment with core business objectives to optimize customer satisfaction and business results.Collaborate with ASIC and compiler teams to articulate and validate OLIX's architectural specifications through rigorous performance modelling across OTPU iterations.Cultivate a thriving, high-performance culture that emphasizes innovation, agility, and operational excellence.Promote a standard of technical excellence through effective design review practices and clear ownership of technical responsibilities in a fast-paced hardware/software co-design setting.Guide strategic technical decisions to harmonize long-term sustainability with immediate project deliverables.Qualifications:Demonstrated engineering leadership in managing complex, long-term projects in dynamic environments, with a strong sense of accountability for team performance.Extensive experience in performance modelling, architecture validation, and cross-functional collaboration.

Join our dynamic team at Extreme Networks as a Senior Software Systems Engineer in Toronto! In this role, you will leverage your expertise to design, develop, and optimize software systems that enhance our innovative networking solutions. Collaborate with cross-functional teams to ensure seamless integration and performance.

We are seeking a highly skilled Senior Application Performance Tester to join our dynamic team at System Canada Technologies. In this role, you will be responsible for assessing application performance across various platforms, identifying bottlenecks, and providing actionable insights to enhance overall system efficiency. You will collaborate closely with developers and project managers to ensure high-quality deliverables.

Join Movable Ink, where we empower marketers with cutting-edge data-activated content generation and AI-driven decision making. Trusted by some of the world's most innovative brands, we help maximize revenue, streamline workflows, and enhance marketing agility. With headquarters in New York City and a diverse team of nearly 600 professionals, our reach extends across North America, Central America, Europe, Australia, and Japan.We are on the lookout for a skilled Senior Backend Engineer specializing in Distributed Systems to join our Activation Team. This dynamic group is dedicated to transforming extensive data sets into actionable insights. In this role, you will design and implement robust distributed software systems capable of processing data at high speeds and scale. The position offers the chance to innovate and create substantial impact by developing sophisticated multi-tiered systems that deliver exceptional value to our esteemed clients. You will be responsible for crafting and deploying high-quality, scalable AI solutions while producing technically impressive products.

Join the innovative team at System Canada Technologies as a Citrix and Microsoft System Engineer. In this contract position, you will leverage your expertise in Citrix and Microsoft technologies to design, implement, and manage solutions that enhance our clients’ IT infrastructure. You will work closely with our clients to understand their needs and deliver tailored solutions that drive efficiency and performance.

Waabi seeks a Senior or Staff Software Engineer to focus on high-performance onboard algorithms in Toronto, ON. This position centers on designing and building algorithms that play a direct role in shaping autonomous driving technology. Role overview The engineer in this role will create efficient and reliable software solutions. These efforts aim to improve both vehicle performance and safety, contributing to the advancement of Waabi's autonomous driving systems. What you will do Design algorithms for onboard vehicle systems Develop software that enhances performance and safety Work on solutions that have a direct impact on autonomous driving capabilities Location This role is based in Toronto, ON.

Kepler Communications is building real-time Internet connectivity for space-based assets. With 33 satellites launched, the company operates the first commercial optical data relay constellation. This network enables continuous communication in space, supporting advanced on-orbit computing and hosted payloads. The team includes experienced engineers and problem-solvers who push the boundaries of space technology. Kepler values diverse perspectives and fosters a culture focused on growth, leadership, and global impact. Those joining Kepler have the opportunity to contribute to the future of the space economy and help shape what comes next.

Veeva Systems is a forward-thinking, mission-driven organization at the forefront of the industry cloud, dedicated to accelerating the delivery of therapies to patients. As one of the fastest-growing SaaS companies in history, we achieved over $2 billion in revenue in our last fiscal year, with vast growth opportunities ahead.Our core values at Veeva include: Integrity, Customer Success, Employee Success, and Agility. We are more than just a public company; in 2021, we made history by becoming a public benefit corporation (PBC), legally committed to balancing the interests of our customers, employees, society, and investors.As a Work Anywhere company, we offer the flexibility to work from home or in our Toronto office, allowing you to thrive in your preferred work environment.Join us in transforming the life sciences industry, where we are dedicated to making a positive impact on our customers, employees, and communities.The RoleWe are seeking experienced Senior Quality Engineers to join our Quality Assurance and Release Engineering team, focusing on Veeva Vault, our rapidly expanding SaaS platform in the life sciences sector, including pharmaceuticals, biotechnology, and medical devices.In this hands-on role, you will be responsible for both functional and automation testing, ensuring the delivery of a high-quality SaaS product. Your contributions will be critical in achieving customer success with each new release.If you are an accomplished Quality Engineer eager to make a significant impact and elevate your career, we want to hear from you. In our dynamic environment, you will actively engage in the product development process, take pride in creating exceptional software, and collaborate with passionate engineers in a vibrant setting while enhancing your skills and knowledge.Veeva is a Work Anywhere company, welcoming applicants from all time zones to apply.

Join Kepler Communications as we redefine the landscape of on-demand space connectivity - we're not just envisioning the future; we're actively shaping it!Our mission focuses on delivering real-time Internet access to space-based assets, ushering in a new era of data-driven exploration and innovation. With 33 satellites successfully launched to date, Kepler operates the first commercial optical data relay constellation, facilitating real-time, continuous space communications while bolstering advanced on-orbit compute and hosted payload capabilities.What truly distinguishes Kepler is our exceptional team: fearless innovators, adept builders, and enthusiastic problem-solvers who are dedicated to pushing the limits of what’s achievable in space. We believe that groundbreaking ideas stem from diverse perspectives, and we are devoted to fostering an environment that promotes growth, leadership, and global impact.If you’re prepared to elevate your ambitions, accelerate your pace, and contribute to projects that will define the future of the space economy - this is your launchpad. Join us in building the future at Kepler!

Mechanical or Embedded Systems Engineer - RoboticsPreferred Location: TorontoReports to: COOType: Full-TimeAbout Dominion DynamicsAt Dominion Dynamics, we are pioneering Canada's first contemporary defense prime, focusing on software-defined, attritable, and sovereign systems. We envision a future where military strength relies not on intricate platforms, but on the harmonious integration of versatile, AI-driven technologies across all domains. Our mission is to develop a cohesive family of systems designed for operational readiness, aligned with Canada's democratic values.Operating predominantly in the Arctic, we prioritize rapid deployment and unwavering adherence to Canadian law and treaty commitments. Our founding team boasts experience from elite organizations, including Anduril, Google, Amazon, and the Canadian Armed Forces. We are dedicated to developing cutting-edge technologies in challenging environments and seek system-level thinkers who excel at the convergence of autonomy, aerospace, and national security.Why This Role MattersReliable autonomy is rooted in strong embedded controls capable of sensing, deciding, and executing within real-world constraints. Our platforms function in remote, resource-limited settings where graceful degradation and predictable behavior are paramount. This role is crucial in ensuring that our robotic systems effectively translate control theory into operational performance by validating hardware/software integration, calibrating controllers, and ensuring dependable behavior under mission conditions.The Role: Mechanical or Embedded Systems Engineer - RoboticsIn this position, you will design, integrate, and validate the embedded control layer that interlinks sensing, perception, and actuation. Collaborating closely with mechanical, electrical, and software teams, you will implement firmware, optimize control loops, and verify system behavior through simulations and physical testing to ensure reliable robotic performance in the field.What You’ll DoDesign and implement embedded control systems for robotic and mechatronic platforms utilizing C++, Python, and ROS/ROS2.Integrate microcontrollers (STM32, ESP32) and real-time operating systems (FreeRTOS, embedded Linux) with sensors, actuators, and communication interfaces (CAN, UART, SPI).Develop and fine-tune motion-control algorithms (PID, Kalman filtering, sensor fusion) to achieve precise and stable performance.

Join our dynamic team at ApprovalMax as a Revenue Systems Engineer, where you'll play a pivotal role in enhancing our go-to-market (GTM) systems stack. This position is crucial for the build, management, and continuous improvement of our GTM systems.As a member of the Revenue Operations team, you will focus on technical execution and maintaining the operational reliability of GTM systems. You will work under the guidance of established architectural frameworks set forth by our central Product and Data leadership, who oversee system-of-record decisions and uphold company-wide data standards.This hands-on role requires you to implement approved solutions, safeguard system integrity, and ensure operational excellence across our GTM tools on a daily basis. You will report directly to the RevOps Team Lead and enjoy a hybrid work environment, spending 2-3 days a week in our Toronto office.Core ResponsibilitiesGTM Integrations & Data Flow (Execution)Implement and maintain integrations between HubSpot, the data warehouse, the product platform, and supporting GTM tools.Create API-based data syncs using Python or Node.js, adhering to defined integration standards.Ensure integrations are reliable, observable, and thoroughly documented.Monitor integrations and promptly resolve operational issues according to agreed escalation processes.Identify and flag architectural or systemic risks to the appropriate stakeholders.HubSpot Systems AdministrationAdminister HubSpot on a daily basis, focusing on:Custom objects, properties, and associationsWorkflows and automationConfigure HubSpot in line with RevOps governance and global data models.Support integrations with adjacent GTM tools (e.g., dialers, enrichment, marketing, and customer success platforms).Data Quality & Governance SupportImplement data quality standards, validation rules, and hygiene processes.Assist with deduplication and lifecycle management processes.Ensure that upstream data quality supports downstream reporting and analytics.Escalate data governance inquiries or structural changes to designated global owners.Collaboration & EnablementCollaborate with RevOps, Sales, Marketing, Customer Success, and Product teams to translate approved requirements into technical solutions.Document systems, integrations, and operational processes clearly.Support the rollout of GTM tools and process improvements from both implementation and support perspectives.

At Veeva Systems, we are a purpose-driven organization at the forefront of the industry cloud, empowering life sciences companies to accelerate the delivery of therapies to patients. As one of the fastest-growing SaaS companies in history, we achieved over $2 billion in revenue last fiscal year and have significant growth opportunities on the horizon.Central to our mission are our core values: Do the Right Thing, Customer Success, Employee Success, and Speed. In 2021, we made history by becoming a public benefit corporation (PBC), legally committed to balancing the interests of our customers, employees, society, and investors.As a Work Anywhere company, we offer the flexibility to work from home or in the office, allowing you to thrive in the environment that suits you best.Join us in transforming the life sciences industry and making a positive impact on our customers, employees, and communities.