Help us build better, more human AI
What we do
We solve AI's data and human-centered challenges at scale, enabling the creation of the most humane and ethical AI.
Sigma.AI addresses one of the biggest problems in AI; high quality, accurate training data.
Sigma Cognition offers custom AI solutions with a data-centric approach.
Together, we help companies ethically scale the next generation of artificial intelligence.
One global team
Sigma has locations in Madrid, London and Miami – with more than 2,500 people from over 50 nationalities and many different cultures collaborating to support our clients.
Who we are
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Integrity no matter what
We are mindful of the impact of our actions.
We act with integrity and hold ourselves and others to accountable. -
Inclusive and sustainable
Sigma is dedicated to building teams, tech, and business practices that are good for people and good for the planet. We believe that when people of diverse backgrounds and identities feel included and impactful in a team, they get the best, and most sustainable, results.
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Human centric
Humans are at the heart of AI, and at the heart of everything we do. From our inclusive teams to the way we design processes, to the customers we serve, we act with the purpose of making human lives better.
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Challenge lovers
We’re at our best when we tackle complex challenges. Instead of sticking to standard solutions, we strive to find the best approach to solve a problem — and we’re keen to grow and learn new things to get there.
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Empathetic collaborators
Discussion culture and empathy go hand in hand at Sigma. When we put our egos aside and put ourselves in our teammates’ shoes, it allows us to talk through even the toughest situations together.
Spotlight on annotation
How does AI learn to listen and speak?
The same as a child does.
You need to teach it the right words and concepts to understand the world around it. At Sigma, we collect, prepare and label the data that companies use to train AI programs to understand speech, text, images, videos and more.
Our annotators are at the heart of this process. With their diverse backgrounds, experience, language skills and perspectives, they interpret and label AI training data with a human touch, helping AI serve humanity better and with less bias.
Open positions
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English Medical Transcriber - Radiology Specialist (Madrid) | Sigma AIAnnotation & Translation · Madrid - Sigma.ai
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English Medical Transcriber - Radiology Specialist (London) | Sigma AIAnnotation & Translation · London
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English Medical Transcriber – Radiology Specialist (Remote) | Sigma AIAnnotation & Translation · United Kingdom · Fully Remote
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English Linguistic Projects - On-site (London)Annotation & Translation · London
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Marathi Translator (Remote) | Sigma AIAnnotation & Translation · India · Fully Remote
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Romanian Translator (Remote) | Sigma AIAnnotation & Translation · Romania · Fully Remote
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Deutsche Audiodatenerfassungsprojekte (Remote)Annotation & Translation · Germany · Fully Remote
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German Linguistic Projects (Remote)Annotation & Translation · Germany · Fully Remote
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British English Audio Collection Projects (Remote)Annotation & Translation · United Kingdom · Fully Remote
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American English Audio Collection Projects (Remote)Annotation & Translation · United States · Fully Remote
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Australian English Audio Collection Projects (Remote)Annotation & Translation · Australia · Fully Remote
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Indonesian Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Bengali (India) Translator (Remote) | Sigma AIAnnotation & Translation · India · Fully Remote
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Javanese Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Korean Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Egyptian Arabic Translator (Remote) | Sigma AIAnnotation & Translation · Egipto · Fully Remote
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Vietnamese Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Polish Linguist Expert (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Polish Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Russian Translators (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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French Linguistic Projects (Remote)Annotation & Translation · France · Fully Remote
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French Audio Collection Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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German Linguistic Projects (On-site London)Annotation & Translation · London
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Japanese Audio Collection Projects (Remote)Annotation & Translation · Spain, United Kingdom, Japan · Fully Remote
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German Audio Collection Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Italian Audio Collection Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Romanian Linguist Expert (Remote) | Sigma AIAnnotation & Translation · Bucharest · Fully Remote
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Ukrainian Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Ukrainian Linguist Expert (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Tamil Linguist Expert (Remote) | Sigma AIAnnotation & Translation · India · Fully Remote
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Mandarin Chinese Linguist Expert (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Mandarin Chinese Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Turkish Linguist Expert (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Turkish Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Dutch Linguist Expert (Remote) | Sigma AIAnnotation & Translation · United Kingdom, Amsterdam, Netherlands · Fully Remote
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Dutch Translator (Remote) | Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Telugu Translator (Remote) | Sigma AIAnnotation & Translation · India, United Kingdom, United States · Fully Remote
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Telugu Linguist Expert (Remote) | Sigma AIAnnotation & Translation · India · Fully Remote
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Japanese Linguistic Projects - On-site (London)Annotation & Translation · London
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French Linguistic Projects (On-site London)Annotation & Translation · London
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Proyectos Lingüísticos de italiano - Presencial (Madrid)Annotation & Translation · Madrid - Sigma.ai
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German Linguistic Projects (On-site London)Annotation & Translation · London
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French Linguistic Projects (On-site London)Annotation & Translation · London
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Hindi (Latin Script) Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Mongolian Linguistic Projects - (London)Annotation & Translation · London
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Lithuanian Linguistic Projects - (London)Annotation & Translation · London
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Latin Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Ukrainian Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Mongolian Linguistic Projects - On-site (London)Annotation & Translation · London
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Laothian linguistic projects (Remote)Annotation & Translation · Laos, United States · Fully Remote
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Proyectos Lingüísticos de francés (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Proyectos Lingüísticos de chino tradicional (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Japanese Linguistic Projects - On-site (London)Annotation & Translation · London
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Azerbaijani Linguistic Projects (London)Annotation & Translation · London
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Proyectos lingüísticos de azerí/azerbaiyano (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Irish Linguistic Projects (London)Annotation & Translation · London
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Proyectos Lingüísticos de chino (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Azerbaijani Linguistic Projects (London)Annotation & Translation · London
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Kansai dialect Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Indonesian Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Bengali India Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Vietnamese Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Arabic linguistic projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Italian Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Nigerian Fulfulde Linguistic projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Urdu Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Hebrew Transcribers (London)Annotation & Translation · London
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Greek Transcribers (London)Annotation & Translation · London
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Czech Transcribers (London)Annotation & Translation · London
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Korean & English Linguistic Projects (Remote)Annotation & Translation · United Kingdom, South Korea, United States · Fully Remote
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Hindi & English Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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French & English Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Chinese & English Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Ligurian Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Korean, Japanese, Mandarin Chinese, & English linguistic projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Ukrainian Transcribers (London)Annotation & Translation · London
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Romanian Transcribers (London)Annotation & Translation · London
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Plautdietsch / Mennonite Low German Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Piemontese / Piedmontese Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Hawai'i Creole English / Hawaiian Pidgin Linguistic Projects (Remote)Annotation & Translation · United States, Hawaii, USA · Fully Remote
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Yucatec / Peninsular Maya Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Yucateco / Yucatec Maya Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Nahuatl from Southeastern Puebla / Tehuacán-Zongolica Nahuatl Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Southeastern Puebla Nahuatl / Tehuacan–Zongolica Nahuatl Linguistic Project (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Southern Quechua / Southern Pastaza Quechua / Wámpuy Linguistc Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Southern Pastaza Quechua / Qichwa / Quichwa / Wámpuy Linguistic Project (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Northern Quechua / Ecuadorian Quichua / Kichwa / Quichua Linguistc Project (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Tena Lowland Quichua / Quechua / Kichwa Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Ngäbere / Ngäbe / Guaymí / Movere / Chiriquí / Valiente Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Ngäbere / Ngäbe / Guaymí / Movere / Chiriqui linguistic projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Tonga / Chitonga / Zambezi Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Malayic Dayak linguistic projects (Remote)Annotation & Translation · United States, Indonesia, Indonesia · Fully Remote
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Turkmen Linguistic Projects (Remote)Annotation & Translation · Turkmenistan, United States · Fully Remote
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Somali Linguistic Projects (Remote) - Sigma AIAnnotation & Translation · Somalia, United States · Fully Remote
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Malagasy linguistic projects (Remote)Annotation & Translation · Madagascar, United States · Fully Remote
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Kurmanji Kurdish linguistic projects (Remote)Annotation & Translation · United Kingdom, Türkiye, United States · Fully Remote
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Kazakh linguistic projects (Remote)Annotation & Translation · Kazakhstan, United States · Fully Remote
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Azerbaijani linguistic projects (Remote)Annotation & Translation · Azerbaijan, United States · Fully Remote
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Assamese Transcribers (Remote)Annotation & Translation · India, United States · Fully Remote
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Akan linguistic projects (Remote)Annotation & Translation · Ghana, United States · Fully Remote
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Mongolian Transcribers (London)Annotation & Translation · London
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Lithuanian Transcribers (London)Annotation & Translation · London
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Kazakh Transcribers (London)Annotation & Translation · London
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Mongolian Transcribers (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Lithuanian Transcribers (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Kazakh Transcribers (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Georgian Transcribers (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Georgian Transcribers (London)Annotation & Translation · London
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Afrikaans Transcribers (Madrid)Annotation & Translation · Madrid - Sigma.ai
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Afrikaans Transcribers (London)Annotation & Translation · London
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Mandarin Chinese linguistic projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Russian Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Norwegian Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Danish Linguistic Projects (Remote) -- Sigma AIAnnotation & Translation · Multiple locations · Fully Remote
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Hebrew Linguistic Projects (Remote)Annotation & Translation · Multiple locations · Fully Remote
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Yoruba Linguistic Projects (Remote)Annotation & Translation · Abuja, Nigeria, United States · Fully Remote
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Hausa Linguistic Projects (Remote)Annotation & Translation · Abuja, Nigeria, United States · Fully Remote
What we offer
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Flexible vacation
Take time off whenever you need it, in consultation with your manager
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Healthcare
Full health coverage for you and your family with the Spanish or UK Health System.
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Parental leave
All new parents, whether birthing or not birthing, are eligible for paid leave.
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Family accomodation
Adapt your work schedule or work from home according to your family needs.
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Drinks at our cafeteria
We offer a variety of coffee, milk, tea, and herbal infusions in our cafeteria
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Professional development
We schedule a variety of annual workshops and seminars for all employees.
About Sigma Group
Help shape the future of ethical AI.
Learn more about Sigma.AI and Sigma Cognition.
Already working at Sigma Group?
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