Senior ML Engineer, Dubbing
Synthesia is the world's leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017 and headquartered in London, with offices across Europe and the US. After a Series E round raising $200M, its valuation stands at $4B. The Dubbing and Localisation team owns Synthesia's end-to-end video translation product, transforming existing videos into new languages while preserving voice, lip sync and timing. You own the design and scaling of an automated translation quality evaluation framework - building the infrastructure that lets the team measure quality consistently, automatically and at scale, partnering closely with the team to reflect real-world product quality needs. The role is remote, preferably based in the UK, Germany, Switzerland or Ireland (other European locations possible subject to compliance).
Responsibilities
- ▹Design and build scalable evaluation infrastructure for automated translation quality measurement
- ▹Own the rollout of that infrastructure starting with Localisation, then scaling across Dubbing and other teams
- ▹Drive consistency and automation in how quality is measured across the pipeline
- ▹Partner with the wider organisation to align evaluation infrastructure with real product and user quality signals
- ▹Maintain and iterate on evaluation systems as the pipeline and product evolve
- ▹Work closely with Synthesia's internal R&D team on evaluation methodology and tooling
Requirements
- ▹Strong ML infrastructure engineering background
- ▹Hands-on experience designing and scaling ML evaluation or quality measurement systems in production
- ▹Solid understanding of ML pipelines and how models are evaluated
- ▹Comfortable owning systems from architecture through to delivery
- ▹Strong backend engineering fundamentals; this role ships real production systems, not research prototypes
- ▹Experience working cross-functionally across multiple teams with different requirements
Nice to have
- ▹Familiarity with NLP, translation quality metrics or speech/audio evaluation
- ▹Experience with LLMs applied to quality scoring or translation evaluation
- ▹Background in async or batch processing pipelines
- ▹Prior work in localisation, dubbing or media processing tooling
Soft skills
What we offer
- ▹Salary starts at EUR/GBP/CHF 120,000 base + stock option plan
- ▹25 days of leave + local holidays
- ▹In-office or remote (UK, Germany, Switzerland or Ireland preferred; other European locations possible)
- ▹Full-time employment only (no contractors), usually through OysterHR