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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Helix Junior Quantitative Developer - **Company:** iSAM Securities - **Location:** London, UK - **Experience:** Starter - **Contract:** Permanent contract - **Skills:** Algorithmic Trading, Data Analysis, Big Data, Unix, Python (Programming Language), NumPy, Backtesting, Data Processing, Information Technology, Integration Frameworks - **Published:** July 18, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=feb3a78c8c42c717 ## About the Role 3 years' experience in a technical role within the finance industry (investment bank, hedge fund and associated firms) * Degree in Mathematics or Physics preferred; other STEM subjects such as Computer Science will also be considered. * Python: Strong software developer with in-depth knowledge and experience. * Numpy (including numba): in-depth knowledge is required. * Strong knowledge of Unix systems (processes, memory, I/O). * Deep understanding of statistical methods, numerical optimisation and equity market microstructure. * Experience working with graph-based (DAG) data processing frameworks. Personal Attributes: * Highly analytical with a strong sense of ownership and accountability. * Comfortable tackling complex, ambiguous problems with limited oversight. * Collaborative mindset with the ability to work closely with researchers, technologists and trading operations. * Calm and reliable under pressure, particularly in live trading environments. ## Description iSAM Helix is an Equities Statistical Arbitrage (StatArb) business line within iSAM Funds, which trades 24/6 globally. iSAM Helix has been live since 2021 and continues to evolve rapidly as part of an ambitious roadmap focused on expanding strategy breadth and capacity. Helix consists of four groups: Research, Quantitative Development, Technology and Data. The project is highly collaborative; the team are looking for a Quantitative Developer capable of working on all aspects of the trading platform - research, development, and live trading platforms. Technology is a front-line function within Helix, playing a critical role in systematic trading. Both the research platform and the production trading system are built on top of custom implementation of high-performance python graph (DAG). The same graph framework is being used across the whole environment - research and back testing, live trading, analytics, risk, position keeping and P&L., The opportunity would involve tackling complex problems in which you'd be a key part of team working on a large breadth of challenges, including the following: * Develop and support a complex quantitative StatArb strategies involving large- scale data processing, sophisticated statistical modelling, portfolio construction and highly optimised execution. * Build and maintain systems handling highly diversified equity portfolios. * Monitoring transaction costs and behaviour of a high turnover strategy. * Process and analyse vast historical datasets for research and back-testing, alongside real-time, tick-level market data for live trading. * Contribute to the design and use of a high-performance, graph-based (DAG) framework enabling concurrent data processing for research and production. * Monitor and manage execution quality, transaction costs and market risks arising from changing market regimes and small statistical effects. * Work closely with quantitative researchers to enhance tooling, frameworks and shared feature libraries. * Take ownership of system components in a fast-paced, agile environment, working both independently and collaboratively as required. * Participate in live trading support, including interaction with orders and brokers as part of a rota (FCA certification required)., * Delivery of robust, scalable and high-performance systems supporting live trading. * Tangible improvements to research productivity, execution quality and platform stability. * Technical excellence and system ownership. ## Related Videos - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [WeAreDevelopers LIVE - Node and Package Security](https://www.wearedevelopers.com/videos/2138-wearedevelopers-live-node-and-package-security) - [Vectorize all the things! 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