Senior Large Scale Training Engineer - LTX Model

Who We AreLightricks is an innovative AI-focused company dedicated to developing state-of-the-art content creation technologies designed for businesses and studios. Our mission is to seamlessly connect imagination with creation. At the heart of our operations lies LTX-2, an open-source generative video model engineered to deliver stunning, high-fidelity video output at unparalleled speeds. It not only fuels our proprietary products but also supports a diverse ecosystem of partners via API integrations.Globally recognized for revolutionizing consumer creativity, our flagship product, Facetune, has introduced AI-driven visual expression to countless users around the world. We pride ourselves on blending rigorous research, user-centric design, and comprehensive execution from concept to completion, making advanced expression accessible to everyone.About the RoleIn your role as a Large Scale Training Engineer, you will be instrumental in optimizing the training throughput of our internal framework, empowering researchers to explore and develop novel model concepts. This position requires exceptional engineering capabilities for designing, implementing, and refining cutting-edge AI models, alongside a strong foundation in writing robust machine learning code and a profound understanding of supercomputer performance. Your skills in performance optimization, expertise in distributed systems, and capability to troubleshoot will be vital, as our framework executes extensive computations across numerous virtual machines.This opportunity is tailored for individuals who possess not only technical prowess but also a fervent passion for advancing AI and machine learning through groundbreaking engineering and collaborative research efforts.Key ResponsibilitiesProfile and streamline the training process to ensure optimal efficiency and effectiveness, including the enhancement of multimodal data pipelines and data storage techniques.Create high-performance TPU/GPU/CPU kernels and incorporate advanced methodologies into our training framework to maximize hardware utilization.Leverage your knowledge of hardware features to implement significant optimizations and provide guidance on hardware/software co-designs.Collaborate with researchers to develop model architectures that promote efficient training and inference.Design, maintain, and evolve a high-quality, shared codebase, emphasizing correctness, readability, extensibility, testing, and long-term maintainability, while balancing performance needs.

Who We Are Lightricks is a forward-thinking AI-driven company dedicated to developing cutting-edge content creation technology for various stakeholders, including businesses, enterprises, and studios. Our mission is to seamlessly connect the realms of imagination and creation. At the heart of our innovation is LTX-2, an advanced open-source generative video model designed to deliver high-fidelity video with unparalleled speed. This technology not only supports our own products but also enhances a growing ecosystem of partner applications via API integration. Globally recognized for our pioneering consumer creativity, we are the creators of Facetune, one of the most celebrated creative brands worldwide, which has empowered hundreds of millions of users with AI-driven visual expression. We merge rigorous research, user-centric design, and comprehensive execution from concept through to the final product, ushering in the future of creative expression for everyone. The Role We are on the lookout for a talented researcher to join our LTX Model Applications team. Your primary focus will be to enhance and broaden the capabilities of our LTX-Video models. You will engage in designing innovative use cases, developing new methodologies for controlling the generation process, and challenging the limits of generative video technology. Your contributions will directly impact millions of users through our applications and further enrich the research and open-source communities, ultimately shaping the next generation of creative tools. What You Will Be Doing Enhancing and broadening the capabilities of our LTX-Video models through innovative controls, features, and use cases. Designing and implementing machine learning models for video, image, and audio generation, as well as multimodal applications. Conducting experiments, prototyping concepts, and validating ideas to drive advancements in generative video technology. Collaborating with engineers, designers, and product managers to translate research insights into impactful product features. Regularly contributing to the open-source community by publishing code, models, and research findings. Staying abreast of the latest research in generative AI related to video, image, and audio, and integrating relevant advancements into our products. Writing high-quality, efficient code while adhering to best practices in research workflows. Mentoring fellow researchers and leading collaborative projects. Your Skills and Experience Master's degree in computer science or a related field; PhD preferred. Solid foundation in generative AI, particularly in video and image generation and processing. Proven ability to generate innovative ideas and lead projects from concept to execution. Familiarity with the latest advancements in generative AI. Strong programming skills in Python or similar languages. Excellent problem-solving abilities and a collaborative mindset.

About Us Lightricks is an innovative AI-driven company, dedicated to developing state-of-the-art content creation technologies for businesses, enterprises, and studios. Our mission is to seamlessly connect creativity with technology. At the heart of our efforts is LTX-2, an open-source generative video model designed to produce expressive, high-fidelity videos at unparalleled speed. LTX-2 powers our proprietary products and a rapidly expanding network of partner integrations via API. Globally recognized for our pioneering work in consumer creativity, our flagship product, Facetune, stands as one of the most renowned creative brands, empowering hundreds of millions of users globally with AI-enhanced visual expressions. We blend deep research, user-centric design, and comprehensive execution from initial concept to final product, striving to redefine the future of creative expression. The Position In response to the success of LTX-2, our popular open-source text-to-audio+video model, we are intensifying our research efforts to innovate advanced audio+video generation models. We are seeking talented Research Scientists to join our LTX-Applications team. As a Research Scientist within the LTX Model Quality team, you will be instrumental in enhancing the quality, controllability, and alignment of our video generation models. This position emphasizes the critical post-training phase, where you will develop and apply techniques such as preference optimization, reward modeling, and human feedback integration to fine-tune model outputs. You will establish robust evaluation frameworks, define quality metrics, and implement systematic methodologies to detect and resolve model shortcomings. Your contributions will directly influence the quality of videos we produce. Your Responsibilities Develop and execute post-training pipelines, including Reinforcement Learning from Human Feedback (RLHF), Direct Preference Optimization (DPO), and other optimization techniques tailored for video generation models. Fine-tune and manage Very Large Language Models (VLLMs) for comprehensive video and audio understanding. Design and refine evaluation metrics and frameworks to assess quality. Conduct thorough analyses of failure modes and devise targeted strategies to close quality gaps. Curate and build high-quality preference datasets and evaluation benchmarks capturing the intricate dimensions of video generation quality. Collaborate closely with fellow researchers to maintain effective feedback loops between human evaluations and model enhancements. Your Qualifications A Master's degree or equivalent practical experience in computer vision or generative AI. Proven experience with post-training techniques applicable to generative or multimodal models. Solid grasp of evaluation methodologies, quality metrics, and benchmark development for generative AI. Strong analytical skills and a problem-solving mindset. Exceptional collaboration and communication abilities.

Join the dynamic LTX Studio team as a Creative Designer, where your creative flair will shape the visual narrative of our products. In this pivotal role, you will craft stunning visual and motion graphics that enhance our product experience. Your work will encompass designing in-product creative elements like banners and pop-ups, along with supporting product demonstrations, partner presentations, and comprehensive product storytelling. Your expertise will be instrumental in defining the aesthetic, style, and visual identity of LTX Studio's product assets, ensuring that every piece is polished, coherent, and resonates with the overall user experience. This hands-on position is ideal for a designer with an eye for detail, exceptional motion skills, and the ability to translate product requirements into captivating visuals. You will collaborate closely with the Product Design, Brand, and Product teams to ensure a cohesive and engaging user experience across all platforms.

Join our innovative team at Lifted, where we are dedicated to advancing artificial intelligence through high-quality training data. We are currently seeking enthusiastic and skilled native Hebrew speakers to assist in our AI training projects. Your contributions will play a crucial role in enhancing linguistic models and improving AI applications.

Role overview Speechify seeks a Senior Software Engineer for its Core Experiences team based in Jerusalem, Israel. This group builds and improves the software that shapes how people interact with Speechify’s products. The work supports Speechify’s mission to make reading accessible for everyone. What you will do Design, develop, and refine features that influence the core user experience on Speechify’s platforms. Collaborate with engineers and designers to deliver software that addresses real user needs. Use modern technologies to create solutions that are reliable and enjoyable for users. The team The Core Experiences team brings together engineers and designers who care about accessibility and high product quality. The group values collaboration and creative problem-solving in their daily work.

About Us Lightricks is an innovative AI-driven company dedicated to transforming imagination into reality. Our flagship technology, LTX-2, is an open-source generative video model designed to produce expressive, high-fidelity video content at remarkable speeds. This technology not only powers our acclaimed products but also supports a growing network of partners through API integrations. Our most popular products, including Facetune and LTX Studio, are utilized by hundreds of millions of users globally. We pride ourselves on merging deep research with user-centric design and comprehensive execution to shape the future of creative expression. Your Role As a Senior ML Software Engineer focused on low-level and CUDA optimizations, you will be instrumental in designing, enhancing, and scaling Lightricks' machine learning inference systems. You will tackle complex technical challenges at the intersection of GPU acceleration, systems architecture, and machine learning deployment. Your expertise in CUDA, C/C++, and performance tuning will be vital for improving runtime efficiency across diverse computing environments. You will collaborate with designers, researchers, and backend engineers to create production-grade ML pipelines optimized for latency, throughput, and memory usage, directly contributing to the infrastructure behind Lightricks' next-generation AI products. This position is perfect for an engineer with a strong systems-level mindset, extensive knowledge of GPU internals, and a desire to drive performance and efficiency boundaries in machine learning infrastructure.

Join Our Innovative Team Lightricks is a pioneering AI-driven technology company focused on revolutionizing content creation for businesses, enterprises, and creative studios. Our mission is to seamlessly transform imagination into reality through cutting-edge technology. At the heart of our operations is LTX-2, an open-source generative video model designed to produce high-quality, expressive video content at extraordinary speeds. This remarkable model not only fuels our proprietary offerings but also supports a thriving ecosystem of partners via API integrations. Globally recognized for our consumer creativity tools, such as Facetune, one of the most esteemed creative brands worldwide, we have empowered hundreds of millions of users with AI-enhanced visual expression. Our approach integrates rigorous research, user-centric design, and comprehensive execution from concept to final output, paving the way for the future of creativity. Your Role As we build on the success of LTX-2, our widely embraced open-source text-to-audio and video model, we are seeking talented Research Scientists to join our LTX-2 Core team. This position is pivotal in developing state-of-the-art audio and video generation models, driving innovation in the field. At Lightricks, we lead advancements in text-to-image and text-to-audio/video generation, with LTX-2 powering our flagship product, LTX Studio, and making significant strides within the research and open-source communities, including integrations with prominent platforms like ComfyUI and Diffusers. This role will emphasize innovating model architecture and pre-training algorithms that will define the future of our foundational generative AI models. Key Responsibilities Pre-train and fine-tune video, audio, and image generative models to achieve cutting-edge outcomes. Publish research papers and open-source models to enhance the academic community and propel advancements in the field. Design and implement machine learning frameworks for text-to-audio and text-to-video generation. Collaborate with data engineers to curate and preprocess diverse text and video datasets. Optimize model performance to ensure efficient training and inference processes. Develop new functionalities and controls within generative text-to-audio and text-to-video models. Stay abreast of the latest trends and developments in Generative AI, particularly in image, video, and audio technologies. Work closely with product teams to seamlessly integrate AI models into applications and services. Conduct experiments and prototype innovative concepts to enhance the capabilities of our AI solutions.

Lightricks is an innovative AI-driven company at the forefront of developing next-generation content creation technologies for businesses, enterprises, and studios. Our mission is to seamlessly connect imagination with creation. Central to our operations is LTX-2, an open-source generative video model designed to produce high-quality, expressive video content at unparalleled speeds. This model not only powers our products but also fuels a growing ecosystem of partners through API integrations. Globally recognized for revolutionizing consumer creativity, Lightricks offers products like Facetune—one of the world’s most famous creative brands—that brought AI-powered visual expression to millions of users. Our approach combines rigorous research, user-centric design, and comprehensive execution from concept to final output, driving the future of expression for all.

Join Becton Dickinson as an Engineer Intern and gain hands-on experience in a dynamic and innovative environment. This full-time internship offers you the opportunity to work on exciting engineering projects while collaborating with experienced professionals in the field.

Speechify builds text-to-speech tools that help over 50 million people turn written content, PDFs, books, Google Docs, news articles, and websites, into audio. Our products span iOS, Android, Mac, Chrome, and web, and have earned recognition from Google (Chrome Extension of the Year) and Apple (2025 Design Award for Inclusivity). Our fully remote team brings together nearly 200 people from top companies like Amazon, Microsoft, and Google, as well as alumni from Stanford, Stripe, and Vercel. Speechify’s culture values technical excellence, clear communication, and strong results. We keep our structure flat: anyone can lead by showing impact. Role overview The Platform Software Engineer will join the team responsible for building and maintaining backend services that power Speechify’s products. This includes areas such as payments, analytics, subscriptions, and integrations with external APIs. The role involves shaping product decisions, improving user experience, and working closely with other teams to support our growth. What you will do Design, build, and maintain APIs, including the public TTS API and internal APIs for payments, subscriptions, authentication, and consumption tracking, balancing business needs and scalability. Own and improve the backend API ecosystem, focusing on performance and long-term maintainability. Contribute to B2B solutions, especially around customization and integration for enterprise clients. Work with cross-functional teams to ensure backend architecture supports product goals and delivers a strong user experience. Interview process The interview process includes several technical interviews, usually completed within one week. Location This is a remote position based in Jerusalem, Israel.

Join the Egis Group as an Integration Engineer, where you will play a critical role in enhancing systems integration. This position involves working with cross-functional teams to design, implement, and maintain integration solutions that streamline processes and improve operational efficiency.

We are seeking a highly skilled and dedicated Senior Financial Analyst to join our dynamic team. In this pivotal role, you will leverage your expertise in financial analysis and strategic planning to drive informed decision-making and enhance our financial performance. As a Senior Financial Analyst, you will be responsible for analyzing financial data, preparing reports, and collaborating with various departments to support our business objectives.This position requires a CFA Level 3 certification or equivalent experience to ensure a comprehensive understanding of financial principles and practices. If you are passionate about finance and eager to contribute to our growth, we want to hear from you!

Role Overview Speechify is looking for an iOS Core Product Software Engineer to join the team in Jerusalem, Israel. This role focuses on building and improving mobile applications that help users read more easily and effectively. The position sits at the heart of our core product work. What You Will Do Develop and maintain iOS features for Speechify’s main product Collaborate with colleagues in Jerusalem to deliver updates and new capabilities Apply iOS development experience to solve real user needs and improve the reading experience Location This position is based in Jerusalem, Israel.

Join our dynamic team in Jerusalem as a Systems Interface Specialist for Urban Railway and Light Rail Transit (LRT) projects. You will be a vital part of the Blue Line LRT project team, where Egis has been designated as the Engineering Monitoring Company (EMC). Your primary responsibilities will include conducting engineering reviews and design audits focused on Interface Management, representing the Client in alignment with the contract established between the State and the Project Company.Your expertise will be crucial in managing extensive requirements related to project interfaces between the scope delivered by the Project Company, both internally and externally. Collaborating closely with the Integration Manager, you will spearhead systematic audits and monitor the governance and maturity of interface management in accordance with contractual obligations, ensuring effective change management and control throughout the project lifecycle.Regular communication with specialist engineers across various disciplines including track, electrification, signalling, and civil engineering will be essential. The ideal candidate will possess strong organizational skills, thrive in teamwork environments, demonstrate exceptional problem-solving abilities, and maintain a proactive approach to innovation.As the Interface Specialist, you will oversee the assessment of key systems engineering documents, requiring a comprehensive understanding of industry standards, design criteria, and the integration of civil, mechanical, electrical, and railway systems throughout the project duration. Furthermore, excellent verbal and written communication skills are essential for promoting our quality and safety values to external partners, including vendors and subcontractors. Familiarity with contractual and technical documents, along with a capacity to elicit contractual requirements in collaboration with technical experts, is necessary.