Synthesia

Staff Research Engineer role at Synthesia, a leading AI video platform, focusing on post-training generative video creation. The role involves applying and adapting foundational models, implementing optimization techniques, and ensuring high-quality output for synthetic humans. Requires expertise in diffusion models, computer vision, and Python.

Research Engineer focused on pre-training foundation models for AI video generation, working on large-scale generative modeling, distributed systems, and production engineering. The role involves advancing training recipes, scaling distributed systems, improving evaluation frameworks, and optimizing inference for production deployment.

Research Engineer focused on avatar-centric interactive video diffusion models, aiming to turn breakthrough ideas into real product capabilities. Responsibilities include adapting diffusion models, developing real-time streaming methods, working on the perceptual layer for user interaction, improving visual quality, and building evaluation frameworks. Requires strong ML/CV background, PyTorch proficiency, and Python engineering skills.

Staff Engineer, Machine Learning at Synthesia, a leading AI video platform. This role focuses on building and owning features for the new Interactive Agents product, a conversational video platform. Responsibilities include working directly with LLMs, prompt engineering, fine-tuning, and building ML infrastructure for agentic AI solutions. The role is end-to-end, involving ideation, product direction, and evaluating work using established data pipelines. Requires at least 7 years of experience, with 3+ at staff level, and experience in high-performing, scaled engineering teams building enterprise-grade SaaS products.

Research Engineer role focused on post-training optimization of generative speech and voice synthesis models to achieve production-level quality, speed, and robustness. Involves adapting models for new inputs, fine-tuning with advanced techniques (DPO, LoRA), implementing post-training optimizations (quantization, pruning, distillation), integrating novel architectures, and designing evaluation metrics for TTS systems.

Staff Backend Engineer role focused on the core systems powering Avatars and Generative Media for Synthesia's AI video platform. The role involves system design, architecture, scalability, reliability, and integration with voice and video pipelines, ensuring avatars function as a first-class entity. It requires a long-term view, technical stewardship, and collaboration with product, R&D, and adjacent teams.

Staff Fullstack Engineer role at Synthesia, an AI video platform company. The role focuses on building end-to-end product features in the Avatars and Generative Media domain, integrating frontend, backend, and AI model capabilities. Responsibilities include owning features from idea to production, working with both third-party and in-house AI models, and tackling 0 to 1 problems. Experience with AI/ML products, experimentation, or feature flagging is a plus.

Staff Software Engineer focused on the core systems for Synthesia's AI video platform, specifically script preview and voice generation. The role involves building and operating backend services that orchestrate multiple TTS providers and in-house models, ensuring reliability, consistency, and quality. Responsibilities include designing persistence systems, improving voice data handling, and working on voice discovery/recommendation features, including evaluation and observability systems. The role requires strong backend engineering skills, a product mindset, and collaboration with R&D and frontend teams.

Principal ML Platform Engineer role focused on building and operating systems for training, serving, and deploying generative models reliably and efficiently. The role emphasizes infrastructure, backend systems, tooling, reliability, scalability, performance, and resource efficiency, with a growing focus on agent-oriented workflows. This is a hands-on IC role with significant ownership in shaping the ML platform's evolution.

Engineering Manager to lead the delivery of complex AI-powered video and generative media systems, focusing on avatar rendering and AI model integration. The role involves breaking down research initiatives, managing senior engineers, scaling the team, and ensuring system reliability and performance for an enterprise-grade SaaS product.

Synthesia is seeking a Senior Research Engineer focused on data to manage the lifecycle of data for AI researchers. This role involves sourcing, processing, and delivering datasets that power their generative AI models, with a focus on video, image, and audio data. The position is at the intersection of applied research, data engineering, and ML infrastructure, emphasizing data quality and curation to improve model performance.