Articles by David Gadyan on building AI products that reach production, data science, algorithmic trading and the freelance path from Upwork to the Barcelona School of Economics.
· 7 min read
In eight years the job changed from training one bespoke model per task to integrating foundation models with retrieval, tools and evals. The next shift is already visible: reinforcement learning leaving the lab and moving into robots. What that means for anyone building a product now.
· 4 min read
An iOS app that trains charisma, communication and rapport-building using improvisation drills — short, repeatable exercises rather than theory, because conversational skill is a motor skill, not knowledge.
· 4 min read
An AI crypto trading strategy that runs live on Binance across eight symbols. XGBoost turns dozens of indicators into a single probability, with trendline and breakout confirmation on a second timeframe and entries on the 1-minute interval.
· 2 min read
Graduating with honours from Barcelona School of Economics after a year of combining an intensive master's with freelance client work in an unfamiliar city.
· 2 min read
A year of simultaneously delivering client work and completing an intensive Data Science for Decision Making master's abroad — the time management, the trade-offs, and the outcome.
· 2 min read
Starting the Data Science for Decision Making master's at Barcelona School of Economics, a programme that integrates data science with economics rather than treating them separately.
· 1 min read
Preparing for and sitting the GRE and IELTS as entry requirements for a data science master's programme, alongside full-time freelance work.
· 1 min read
Upwork's Expert-Vetted status is limited to the top 1% of talent and awarded by an expert screening panel. Reaching it took four years, 100+ clients and 6,000+ hours.
· 3 min read
An honest answer to the most common question from people entering data science: how much maths is genuinely required, and which parts of it matter in practice.