Senior Quant Developer

Are you passionate about building quantitative trading systems that combine advanced analytics, machine learning, and high-performance engineering? We are looking for a Senior Quant Developer to join a cutting-edge financial technology project focused on algorithmic trading and portfolio optimization. In this role, you will work remotely with international teams across Ukraine and Europe, contributing to scalable research and investment platforms used in data-driven financial environments. You will have an opportunity to work with modern quantitative technologies, large-scale market data, and production-grade engineering practices. We at Sigma Software offer the flexibility of remote collaboration, professional growth opportunities, and the chance to work on impactful fintech solutions together with experienced engineering and quantitative teams. CUSTOMER Our Customer is a fast-growing technology company developing AI-driven solutions for the financial services industry. The company specializes in quantitative research, algorithmic trading, portfolio optimization, and intelligent investment platforms. By combining cloud-native engineering, machine learning, and quantitative analytics, the Customer delivers scalable and high-performance financial solutions for modern trading environments. PROJECT The project focuses on the development and enhancement of quantitative trading and portfolio management platforms. The team builds scalable systems for market data processing, strategy research, backtesting, portfolio optimization, and performance analysis across multiple asset classes. The solution integrates advanced analytics and machine learning into production-grade investment workflows while emphasizing automation, reliability, and engineering excellence in systematic trading environments. Design, develop, test, and deploy quantitative trading and portfolio management solutions Develop and maintain research, backtesting, and portfolio optimization frameworks Analyze historical and real-time market data across multiple asset classes Implement validation, simulation, and performance testing methodologies Integrate machine learning models into quantitative workflows where applicable Collaborate with engineering and quantitative teams to deliver production-grade solutions Contribute to software architecture, code quality, automation, and operational excellence Monitor and improve strategy performance, scalability, and system reliability Participate in technical discussions, design reviews, and solution planning Optimize data processing pipelines and analytical workflows for performance and scalability 5+ years of commercial software development experience Strong Python development expertise Hands-on experience with Pandas, Polars, NumPy, or similar data processing libraries Experience building quantitative analytics, research, or trading systems Strong knowledge of statistics, probability, and quantitative modeling techniques Experience with backtesting frameworks and performance analysis Understanding of portfolio construction and risk management concepts Experience working with relational and time-series databases Practical knowledge of PostgreSQL or equivalent databases Experience with Git, Docker, and CI/CD practices Strong analytical thinking and problem-solving skills Upper-Intermediate or higher English level WILL BE A PLUS Experience with VectorBT, Backtrader, QuantConnect LEAN, or similar platforms Exposure to machine learning frameworks such as PyTorch, XGBoost, or LightGBM Knowledge of equities, futures, forex, or cryptocurrency markets Experience with FIX protocol integrations Exposure to Java or C++ Experience with cloud platforms and distributed systems Background in institutional trading, fintech, or investment management solutions PERSONAL PROFILE Ability to work independently Ability to convey ideas, recommendations, and strategy clearly Excellent verbal and written communication skills Strong collaboration and teamwork abilities Proactive and ownership-driven mindset Strong attention to detail and analytical thinking