AI Trainer – Fluent Serbian Speaker - Basel, Switzerland
- Pay
- $20–$26/hr
- Location
- Switzerland
- Type
- Not listed
- Posted
- Jul 13, 2026
- Languages
- English, Serbian, Thai
AI Trainer - Fluent Serbian Speaker
About Prolific
Prolific is not just another player in the AI space – we are building the biggest pool of quality human data in the world.
Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills.
The role
We are seeking fluent Serbian speakers to act as evaluators. AI models are now learning to communicate with human-like nuance, and we need fluent speakers to ensure these models understand the depth and nuance of the Serbian language.
You will be completing side-by-side evaluations of both text and voice snippets, assessing how naturally and authentically the AI captures Serbian speech. This includes listening to audio clips and identifying how natural the voice sounds. This is a fast-paced project where your ear for detail directly influences how AI understands human language.
Researchers looking for your skills tend to pay between $20-26/hr. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter.
What you’ll bring
- Thai language fluency: you must be a fluent Serbian speaker with a strong command of natural, everyday Serbian
- Linguistic nuance: an ability to distinguish subtle differences in accent, tone, and vocal delivery
- Communication: fluent English skills for instruction following and reporting
- Soft skills: high attention to detail; backgrounds in linguistics or translation are a plus
- Technical setup: access to a quiet environment and good quality headphones/ speakers
- A PayPal account to receive payment from our clients
What you’ll be doing in the role
- Side-by-side evaluation: comparing text and voice snippets to assess quality and authenticity
- Naturalness assessment: listening to AI-generated audio and rating how natural the voice sounds
- Quality control: identifying where the AI's tone or pronunciation feels unnatural or culturally mismatched
- Contextual review: identifying whether intonation matches the cultural context of the conversation
- Data tagging: providing feedback on the naturalness, tone, and authenticity of the audio
Why Prolific is a great platform to join as a Participant
Joining our Expert Network will give you the chance to influence the AI models of the future using your professional expertise. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home.
We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems.
We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation – one that reflects the breadth and the best of humanity.