About
A small team in Murska Sobota, Slovenia, building risk-first trading infrastructure for independent traders across the EU.
Hartwell & Sons develops and operates an AI-powered trading terminal for independent traders and small funds operating in EU financial markets. The platform connects to live exchange data, automates the execution of user-defined trading strategies, and enforces pre-configured risk limits so that no single session can exceed the boundaries a trader sets in advance. It is software infrastructure for people who have a trading strategy and want a disciplined, automated way to execute it — not a black-box system that makes decisions for them. The company was founded in 2019 in Murska Sobota, a small city in the Prekmurje region of northeastern Slovenia, by a team with backgrounds in quantitative finance and backend systems engineering. We serve individual traders and small professional funds based primarily in Slovenia and the broader EU, with the platform available in both English and Slovenian. Since launch, we have supported over 120 active user strategies and processed more than 2.4 million order instructions through our risk-control layer.
Our team of seven works in a single shared office in Murska Sobota, with two remote engineers based in Ljubljana. We release platform updates on a two-week cycle and maintain a public changelog so subscribers always know what changed and why. Every new feature goes through a two-week internal testing period before it reaches any live trading session, because a bug in a risk-control module is not a minor inconvenience — it's a financial risk. We do not offer managed accounts, portfolio management, or investment advice of any kind. The terminal executes the strategies you define; it does not suggest what to trade or when. Backtesting results shown on the platform are historical simulations — they do not predict future performance, and we phrase every report to make that explicit. Market risk, liquidity risk, and broker-side execution risk remain with the trader at all times. What we can control — data latency, system uptime, and the integrity of your risk-parameter enforcement — we take very seriously. Our 99.7% uptime figure is measured and published monthly, not estimated.
Every design decision is evaluated against one question: does this make it easier or harder for a user to exceed their own risk limits? Features that make it easier to override limits do not get built, even if users ask for them.
We show the worst-case trade sequences in backtest reports, not just averages. We publish platform uptime monthly. We document what the risk controls do not protect against. Honest reporting is more useful to traders than flattering numbers.
All compute, storage, and data pipelines run on EU-based servers. No user data, strategy configuration, or trading history is processed outside the EU. This is an infrastructure commitment, not a marketing claim — it's enforced in our hosting contracts.
We're based in Murska Sobota and reply to all enquiries within one business day.
Lendavska ulica 28, 9000 Murska Sobota, Slovenija · info@orbityastro.site · +386 2 534 1870
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