Senior Research Engineer - Data

Join to apply for the Senior Research Engineer - Data role at Synthesia. Welcome to the video first world. From your everyday PowerPoint presentations to Hollywood movies, AI will transform the way we create and consume content. Today, people want to watch and listen, not read — both at home and at work.

Despite the clear preference for video, communication and knowledge sharing in the business environment are still dominated by text, largely because high‑quality video production remains complex and challenging to scale — until now …

Meet Synthesia. We’re on a mission to make video easy for everyone. Born in an AI lab, our AI video communications platform simplifies the entire video production process, making it easy for everyone, regardless of skill level, to create, collaborate, and share high‑quality videos. Whether it’s for delivering essential training to employees and customers or marketing products and services, Synthesia enables large organizations to communicate and share knowledge through video quickly and efficiently.

We’re trusted by leading brands such as Heineken, Zoom, Xerox, McDonald’s and more. In February 2024, G2 named us the fastest growing company in the world. Today, we’re at a $2.1 bn valuation and we recently raised our Series D. This brings our total funding to over $330 M from top‑tier investors, including Accel, Nvidia, Kleiner Perkins, Google and top founders and operators including Stripe, Datadog, Miro, Webflow, and Facebook.

What you’ll do at Synthesia: The Data team manages the complete lifecycle of data for researchers — from sourcing and large‑scale processing to delivering datasets that power our models. Data sits at the heart of our research efforts and enables all other teams. As part of the Data team, you’ll work with over a million hours of video and audio data. This role exists at the intersection of applied research, data engineering, and ML infrastructure rather than being a traditional research position. You’ll build the world’s best human‑centric data lake by collaborating closely with our model‑training teams. By understanding their requirements, you’ll extract new features and annotations that elevate our datasets. You should be passionate about enhancing model performance through high‑quality, accurate datasets. Our infrastructure and pipelines are in great shape, and this role provides room to not only enhance them but also influence the team’s longer‑term strategy.

What we’re looking for:

• Background in Computer Science, Computer Vision, or Audio ML
• Experience working in deep learning teams and production environments
• Strong Python skills and a passion for clean, maintainable code
• Hands‑on experience with workflow orchestration
• Interest in large‑scale, non‑tabular data (video, audio, images)

Bonus point if you have experience in:

• Processing large volumes of data in the video and/or audio domain
• Working on the data side of a GenAI product

Why join us? We’re living the golden age of AI. The next decade will yield the next iconic companies, and we dare to say we have what it takes to become one. Here’s why.

Our culture: At Synthesia we’re passionate about building, not talking, planning or politicising. We strive to hire the smartest, kindest and most unrelenting people and let them do their best work without distractions. Our work principles serve as our charter for how we make decisions, give feedback and structure our work to empower everyone to go as fast as possible.

Serving 50,000+ customers (and 50% of the Fortune 500) We’re trusted by leading brands such as Heineken, Zoom, Xerox, McDonald’s and more.

Proprietary AI technology: Since 2017, we’ve been pioneering advancements in Generative AI. Our AI technology is built in‑house, by a team of world‑class AI researchers and engineers.

AI Safety, Ethics and Security: AI safety, ethics, and security are fundamental to our mission. While the full scope of Artificial Intelligence’s impact on our society is still unfolding, our position is clear: People first. Always.

The good stuff:

• Competitive compensation (salary + stock options + bonus)
• Hybrid work setting with an office in London, Amsterdam, Zurich, Munich, or remote in Europe.
• 25 days of annual leave + public holidays
• Great company culture with the option to join regular planning and socials at our hubs + other benefits depending on your location

Job Details:

• Seniority level: Mid‑Senior level
• Employment type: Full‑time
• Job function: Engineering and Information Technology
• Industry: Software Development