David Mataciunas

CEO

London, England, United Kingdom9 yrs 3 mos experience

AI EnabledAI ML Practitioner

Key Highlights

Second-time founder with extensive AI expertise.
Led training for award-winning Aya multilingual model.
Contributed to AI policy initiatives in Lithuania.

Stackforce AI infers this person is a leader in AI Research and Development, specializing in large-scale machine learning systems.

Contact

Skills

Core Skills

Machine LearningFinancial AnalysisLarge Language Models (llm)Ai ResearchData InfrastructureAi EngineeringData Science

Other Skills

Artificial Intelligence (AI)Deep LearningLarge Action ModelsProcess AutomationGPT-4Prompt EngineeringCloud ComputingAgentic AutomationAgentic WorkflowsResearch SkillsDatasetsData AnalysisComputer VisionAnalytical SkillsBig Data

About

Second-time Founder · AI Researcher & Data Scientist | 8+ years Second-time founder and AI researcher with 8+ years of experience building large-scale ML systems and AI-native data infrastructure. Previously a Researcher & Data Scientist at IBM, and later led AI and agentic data workflows at Sunrise, one of Europe’s largest telecommunications providers, owning production-grade data platforms used across the organization. Contributed to training the Aya multilingual large language model with Cohere Labs, and published research accepted at NeurIPS and ICML. Collaborated on independent research projects with MIT and Google. Co-founder of the Lithuanian AI Research Group, contributor to national AI policy initiatives through the AI Association of Lithuania, and Cursor Ambassador. Currently focused on building agentic infrastructure that bridges e-commerce and AI agents.

Experience

9 yrs 3 mos

Total Experience

1 yr 9 mos

Average Tenure

6 mos

Current Experience

Stealth ai startup

CTO & Co-Founder

Nov 2025 – Present · 6 mos

Aq22

CTO & Co-founder

Jul 2024 – Sep 2025 · 1 yr 2 mos · New York, United States

AQ22 is developing an autonomous financial agent to conduct due diligence within the private credit industry.

Machine LearningFinancial AnalysisLarge Language Models (LLM)Artificial Intelligence (AI)Deep LearningLarge Action Models+1

Artificial intelligence association of lithuania

2 roles

Chairman of the Board

Jan 2023 – Jan 2025 · 2 yrs

Large Language Models (LLM)GPT-4Prompt EngineeringAI Research

Board Member

Jan 2021 – Jan 2025 · 4 yrs

Cohere

Community AI Researcher (Cohere for AI)

Jan 2023 – Jan 2025 · 2 yrs

Lead European Languages for Aya model training (https://cohere.com/research/aya) - Accepted to ACL 2024
Aya was chosen by the Stanford AI Index Steering Committee as the most notable model and dataset releases of 2024 (https://hai.stanford.edu/assets/files/hai_ai_index_report_2025.pdf)
The Aya model, developed by Cohere For AI, won a Best Paper Award at ACL 2024 (Association for Computational Linguistics).

Large Language Models (LLM)Artificial Intelligence (AI)AI Research

Turing college

Senior Team Lead for Data Science

Mar 2022 – Apr 2024 · 2 yrs 1 mo · Vilniaus, Lithuania

Sunrise upc gmbh

AI Engineering Lead

Jan 2022 – Jan 2024 · 2 yrs · Zurich, Switzerland

Large Language Models (LLM)Prompt EngineeringData InfrastructureCloud ComputingAgentic AutomationAgentic Workflows+1

Ibm

Data Scientist / ML Engineer

May 2019 – Jan 2022 · 2 yrs 8 mos · Lithuania

Used machine learning and deep learning algorithms to analyze and solve complex business problems;
Applied statistical and algebraic techniques to interpret key points from gathered data;
Prepared machine learning pipelines in Azure and AWS cloud platforms;
Used PySpark and Databricks libraries/platforms to analyze big data;
Developed, deployed machine learning models using Scikit-learn, Xgboost, to predict risk management for projects.
Developed, deployed object detection tools using Detectron 2 and Yolo v4
Used transfer learning for different computer vision, NLP and speech recognition task.
Applied MLops for different projects.

Prompt EngineeringMachine LearningData Science

Invl asset management

Financial Data Analyst

Apr 2017 – Apr 2019 · 2 yrs · Vilnius

Synthesized current business intelligence data to produce reports and polished presentations, highlighting findings and recommending changes;
Developed database objects, including tables, views and materialized views using SQL;
Coordinated statistical data analysis, design, and information flow.