Estay
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Build the quantitative tools that preserve wealth.

Join our quant and AI team: a mature, seasoned group working on risk mitigation, capital preservation and mathematical excellence.

See open positionsHow to apply

Why Estay

A seasoned team and pioneering research in financial artificial intelligence.

We combine a mature team, with an average age of 48, with over a decade of proprietary AI trading experience. We work on a non-custodial, API-based model with institutional infrastructure partners, and our emphasis is strictly on risk mitigation, capital preservation and mathematical excellence.

We offer competitive compensation, performance-linked upside, flexible remote-working models and the opportunity to build state-of-the-art quantitative tools.

48
Average age of the team
11+
Years of proprietary AI trading experience
4
Open positions

How we build

Four engineering pillars behind Smart Balanced Hedging.

1
Cybernetic control systems

Inspired by Stafford Beer, our master control model continually regulates strategies in real time instead of relying on linear, static algorithms.

2
Helical neural networks

Our neural architecture filters noise and identifies complex, multi-dimensional market patterns across hundreds of sources simultaneously.

3
Denoised portfolio allocation

Marcenko-Pastur eigenvalue cleaning and Hierarchical Risk Parity optimise capital allocation far beyond Modern Portfolio Theory.

4
Live machine learning

Deep learning cannot be backtested in isolation; our technology trains continuously in real market conditions, with an emphasis on robust out-of-sample edge.

Detail of a sail at sunset

Open positions

Four roles in our core engineering and operations team.

Quantitative Machine Learning Engineer
Full-time · Remote / Hybrid

Develop and refine our adaptive machine-learning models. Responsible for feature engineering, dimensionality reduction (PCA), loss-function design and maintaining our robust parameter-optimisation pipeline.

PythonPyTorchFinancial MLHierarchical Risk ParityTime series
Senior Algorithmic Trading Systems Engineer
Full-time · Madrid / Remote

Architect low-latency infrastructure connecting our execution engine with the prime broker (LTP) and top-tier venues. Build automated margin rebalancing, API connectors and execution monitoring.

C++ / RustPythonREST / WebSocket APIDerivativesLow latency
Full-Stack FinTech Developer
Full-time · Remote

Design user-facing and internal dashboards for real-time tracking of portfolio performance, API-key linking, risk metrics and trade verification.

TypeScriptReactNode.jsTailwindCSSFinancial visualisation
Derivatives Risk & Operations Analyst
Full-time · Madrid / Hybrid

Oversee strategy behaviour around the clock: monitoring balanced hedges, funding rates, liquidity dynamics and prime-brokerage operational workflows.

Futures risk managementLTP / exchange APIsData analysis

Our stack

Technology and operating environment.

Domain
Primary technologies
Focus area
ML & research
Python, PyTorch, NumPy, SciPy, Scikit-learn
Neural networks, PCA, Marcenko-Pastur denoising
Execution engine
Rust, C++, async Python, WebSockets
Sub-second order routing, dynamic rebalancing
Infrastructure
Docker, Kubernetes, AWS, Redis, TimescaleDB
24/7 high availability, zero-downtime rollout
Prime brokerage
LTP API, exchange-native APIs
Non-custodial API execution, institutional clearing

How to apply

Write to us and tell us which role interests you.

Send your CV and a few lines about what you would like to build to the address below. We read every application and reply personally.

Careers
careers@estayam.com
estayam.com