QST Financial QST Financial

Smart enough to be right.Fast enough to matter.

A boutique proprietary trading firm, in the market since 2008. Research, low-latency engineering and the machines underneath, in the hands of the people who own the results.

Join us
// 01 About / Method

Complex models.
Short paths.

Smart is a modelling problem. Fast is an engineering problem. We take both seriously: models complex enough to predict how markets move, and a hot path short enough to act before the edge is gone.

Underneath sits the work that makes research possible — clean data, our own cluster, a platform that carries an idea to live trading intact. We care about doing the research well. We know it counts for nothing until it makes money.

Process · Idea to live
01 · INGEST Market data Tick-level feeds across the world's most liquid venues.
02 · RESEARCH Signal ML-driven market-microstructure analysis.
03 · EXECUTE Low-latency C++ Hot path measured in nanoseconds, FPGA-aware.
04 · OBSERVE Live PnL Realtime monitoring, kill switches, risk envelopes.
// 02 Careers / Open positions

Hard to get into.
Rewarding to stay.

We hire for a career, not a headcount plan. People stay here for years, which only works because we are careful about who joins in the first place.

Small team is a consequence, not a goal. Whoever clears the bar gets mentorship, compute, relocation, and the time to get properly good.

Expect hard problems, short feedback loops, and colleagues who will tell you plainly when your model is wrong.

Research 1 open role
Engineering open door
QR-001 Full-time
On-site / hybrid

Quantitative Researcher

Own the full research pipeline — generating ideas, testing hypotheses, building models on statistics and machine learning, and taking them from experiments through validation to live trading. Autonomy is high and the path from hypothesis to launch is short.

REQUIRED: Foundations in probability theory and statistics, hands-on ML, confident Python, and the discipline to drop ideas the data won't support. BIG PLUS: C++, low-latency execution, or research shipped to production. WELCOME: International olympiad medalists, PhD-track background, standout Kaggle / Codeforces.
Full description Apply
SD-002 Open door
Not actively hiring

Software Developer

We're not actively hiring for this role, but we'd like to hear from engineers who are genuinely exceptional at low-latency systems. If that's you, don't wait for a posting.

WELCOME: ICPC finalists and medalists, low-latency or FPGA experience, deep C++ backgrounds, systems programmers who have shipped work you'd want us to see.
Introduce yourself
Don't see your role?
We are often interested in strong people whose work doesn't fit a posting. Write to [email protected]

Before sending a CV, please read our Privacy Notice. Please do not include sensitive personal information unless we specifically request it.

// 03 Charity / Initiatives

Maths first.
Careers later.

Most of us are here because a teacher, an olympiad or a scholarship pointed us at a hard problem early. We are not a foundation and we do not run programmes ourselves — we fund the people who do.

What we have funded so far:

  • Scholarships for graduate students of financial mathematics
  • Research-project competitions for early post-doctoral researchers
  • Regular extra-curricular maths competitions for school children

If you run something like this, write to [email protected]. We read all of it.

// 04 Contact / Correspondence

Interested?
Get in touch.

General [email protected] Careers [email protected] Charity [email protected] Connect Follow us on LinkedIn

When you contact us, we use what you send to answer and manage your enquiry. Our Privacy Notice says how.

⌖ Registered officeGuernsey

PO Box 142, Suite 2,Block C Hirzel Court,St Peter Port, Guernsey, GY1 3HT

GMT / BST · UTC+00
⌖ OfficeCyprus

Office 703 @ The Oval,Krinou 7/1, Agios Athanasios,Limassol 4103, Cyprus

EET / EEST · UTC+02