Quantitative Researcher

Firm Overview

K4 is a proprietary trading firm and technology provider operating at the intersection of quantitative finance and frontier markets. While many firms compete in established venues, K4 leverages deep domain expertise to systematize liquidity in complex, emerging, and idiosyncratic markets.

At K4, research outcomes drive more than just risk-adjusted returns. We design and deploy the financial infrastructure that powers modern markets, partnering with leading research organizations to solve engineering problems at a global scale. We distinguish ourselves by building the "rails" for the world's most complex markets—creating a technological edge that is difficult to replicate.

The Role

As a Quantitative Researcher, your goal is to develop mathematical models that predict price movements and optimize execution in environments characterized by fragmented liquidity and unique microstructure. You will work in a tight feedback loop with our Quantitative Technologists.

Key Responsibilities

• Alpha Generation & Signal Processing: Originating and validating hypotheses to predict asset returns.
• Predictive Modeling: Applying advanced statistical techniques (time-series analysis, machine learning, stochastic calculus) to forecast price movements over various time horizons.
• Feature Engineering: Extracting predictive signals from non-traditional, messy datasets specific to frontier markets (e.g., on-chain data, fragmented order books, or alternative geospatial data).
• Idiosyncratic Arbitrage: Identifying and exploiting structural dislocations in markets that other firms deem "too difficult" or "too opaque" to trade automatically.
• Portfolio Construction & Optimization: Turning raw predictions into a cohesive, risk-managed trading strategy.
• Risk Management: Developing robust covariance matrices and risk constraints to ensure survival and profitability during "black swan" events or volatility shocks.
• Position Sizing: Utilizing techniques to allocate capital efficiently across hundreds of uncorrelated strategies.
• Execution Research (Market Microstructure): Understanding how orders interact with the matching engine is critical.
• Latency Analysis: Analyzing fill data to understand the exact mechanics of market impact and adverse selection.
• Protocol Optimization: Collaborating with engineers to reverse-engineer exchange behavior and optimize order placement logic for specific frontier venues.

Qualifications

• Advanced Degree: Ph.D. or M.S. in a quantitative field (Physics, Mathematics, Statistics, Computer Science, or Electrical Engineering).
• Scientific Computing: Fluency in Python (NumPy, SciPy, Pandas) for data analysis and research.
• Implementation Skills: Proficiency in C++ or Rust is highly desirable. At K4, researchers are expected to understand the production systems their models run on.
• Statistical Rigor: A deep understanding of probability theory, linear algebra, and regression analysis. You should intuitively understand the dangers of overfitting and look-ahead bias.

We are looking for individuals with a fierce intellectual curiosity and a "first-principles" approach to problem-solving. We value raw analytical horsepower and the ability to apply it to open-ended problems.

To apply, please submit your Resume/CV and, if applicable, a link to your research portfolio (SSRN, arXiv) or GitHub. We are particularly interested in research that demonstrates creativity in data selection and rigorous methodology.