Mid-level Data Scientist

Description

We are looking for a data scientist! Your primary role will be to unlock the full potential of deep learning and computer vision algorithms, transforming video streams into structured translation data. You will work end-to-end: from aligning with the Linguistics team to screen reference videos, to packaging models for deployment by the Engineering team. Additionally, you will actively contribute to continuous improvements of multimodal LLM-based models. Every day, we work alongside exceptionally talented people united by the same purpose: making the world a more accessible and equitable place for everyone. We value collaboration and foster a strong team spirit — even remotely, we maintain close connections with all team members. Come share knowledge and impact the lives of thousands of people across Brazil and around the globe. Join us as a HandTalker! If you want to be part of this mission to break down communication barriers between Deaf and hearing people worldwide through technology, join us and learn more about Hand Talk! * Join an AAA-tier team. * Enjoy an excellent work environment, seasoned with just the right touch to deliver a truly great experience :) * Work side-by-side with some of Brazil’s and the world’s most recognized social entrepreneurs. * Take ownership of your career in a challenging project environment. * A highly challenging and collaborative environment. * Opportunities for accelerated learning and growth, with chances to implement projects that will become digital success stories. Visit our blog, YouTube channel, social media accounts, or simply Google “Hand Talk” — you’ll find plenty of exciting content! **Responsibilities and Assignments** **Key Responsibilities:** * Hands-on involvement in Data Science projects, preferably with experience in Computer Vision or NLP; * Solid understanding of fundamental machine learning concepts (fair data splitting, regularization, hyperparameter tuning); * Ability to define and compute performance metrics (Accuracy, Precision, Recall, F1-Score) and optimize inference time for real-time use; * Practical experience with version control (Git) and Scrum framework ceremonies; * Strong Python skills for data manipulation, feature extraction, and model training; * Practical knowledge of JavaScript/TypeScript for frontend model execution and integration; * Experience with Deep Learning frameworks (TensorFlow) and Computer Vision (integration of MediaPipe library combined with OpenCV); * Basic understanding of system architecture and ability to containerize simple applications using Docker for handoff to Engineering. **Requirements and Qualifications** **Technical Skills:** * Build, train, and fine-tune neural network models (TensorFlow) focused on recognizing spatial and temporal sign language patterns in videos; * Collect, balance, and apply preprocessing and feature engineering techniques to multimodal data; * Actively collaborate with the Linguistics team to define criteria, domains, and standards for reference videos to be recorded and cataloged for training; * Prepare, convert, and optimize models trained in Python to run efficiently and with low latency in users’ browsers via JavaScript; * Structure model code, dependencies, and artifacts in an organized manner (via Docker/Git), ensuring clean delivery to the Engineering team. **Behavioral Skills:** * Interest in diversity, inclusion, and accessibility; * Curiosity; * Collaborativeness; * Multidisciplinary communication — ability to translate technical data requirements to linguists, while simultaneously aligning requirements with Engineering and Product teams; * Structured, action-oriented mindset; * Comfort working amid ambiguity and in early-stage environments; * Impact-focused — not just output-focused; * Commitment to delivering functional solutions that solve end-user problems within sprint deadlines. **Preferred Qualifications:** * Advanced English proficiency * Experience in model optimization **Additional Information** **OUR BENEFITS:** * **CLT Employment Contract:** Security and full legal rights guaranteed from day one. * **Caju Benefits Card (R$ 1.160,00):** Flexibility to use your balance as you prefer: meals, groceries, remote work, culture, and mobility! * **Remote Work — From Anywhere You Are!** Freedom to work from anywhere in Brazil, with flexibility and comfort. * **SulAmérica Health Insurance** * **SulAmérica Dental Insurance** * **SulAmérica Life Insurance** * Online consultations with specialists at your fingertips via **Conexa Saúde** — telemedicine. * **Wellhub:** To always bring your best self to work! * **Extended Year-End Break:** Celebrate the holidays with greater peace of mind! Enjoy an extended period to recharge with family and friends. * **Birthday Day Off:** A special rest day during your birthday month! * **Extended Parental Leave:** Support and quality time for those building or growing their families. * **Continuous Professional Development:** Access top-tier platforms like **LinkedIn Learning**, plus an **annual training allowance** for courses and certifications in your field. Invest in yourself! * **University Partnerships:** Support to go further through discounts and raffles! * **Brazilian Sign Language (Libras) Training:** Learn this vital language for our community! * **English Pass:** English learning to keep advancing your career! * Work equipment shipped directly in your Onboarding Kit. **Our mission is to break down communication barriers between Deaf and hearing people worldwide through technology.** With the help of our friendly virtual translators, **Hugo and Maya**, our HandTalker team helps build more accessible digital spaces for millions of people with disabilities. Our award-winning **Super App**, recognized globally — including by the UN — has surpassed 9 million downloads and delivers an effective, enjoyable learning journey, encouraging communication between Deaf and hearing people. The **Hand Talk Plugin**, meanwhile, brings together an ecosystem of innovative assistive solutions that connect people and companies through digital accessibility. We’re just getting started! In 2025, we took an even bigger leap by joining **Sorenson Communications**, the global leader in communication solutions for Deaf and hard-of-hearing people. We are now part of the world’s largest sign language communication ecosystem! Click here to view some of our success stories in partnership with our clients! More information about us and how we’re transforming the world through accessibility is available on our YouTube channel. **Our impact is now global — and you can be part of it!** **#SomosTodosSorenson**