Data Platform Engineer at Caxton | London

Caxton Associates, established in 1983, is a global trading and investment firm with offices in London, New York, Singapore, Monaco, Dubai, and Bengaluru. The company manages both client and proprietary capital, offering a variety of investment products for different investor needs. Caxton operates with a multi-portfolio manager approach and specializes in discretionary global macro investing, applying expertise across asset classes and markets. Role overview The Software Development team at Caxton Associates in London is looking for a Python LLM Engineer. This team builds scalable, reusable, and efficient distributed services and applications that support users across the firm. What you will do Create and deploy Python workflows that use large language models (LLMs), integrating them into current business processes. Implement retrieval-augmented generation (RAG) and related architectures to ensure LLM outputs are grounded in proprietary data. Design secure data integrations by connecting models to internal knowledge bases, APIs, and document repositories. Automate research and operational tasks to improve efficiency and quality within the firm. Develop and maintain reliable data pipelines for document parsing, enrichment, and structured data extraction. Write maintainable, testable Python code to support scalable AI services in production environments. Run pilots and proofs of concept to showcase value and establish best practices for AI adoption at Caxton. Troubleshoot and enhance model performance, retrieval accuracy, and infrastructure reliability. Stay up to date with advances in LLMs, prompt engineering, and applied machine learning; evaluate and prototype new approaches. Location This role is based in London, England, United Kingdom.

Company Overview:Founded in 1983, Caxton Associates is a prestigious global trading and investment firm with a presence in key financial hubs including London, New York, Monaco, and Singapore. Our primary focus lies in managing both client and proprietary capital through innovative global macro hedge fund strategies. Our diverse asset management approach allows us to engage in a wide array of global markets and financial instruments.About the Associate Portfolio Manager Program:At Caxton Associates, we pride ourselves on cultivating top-tier investment talent. This commitment inspired the launch of our comprehensive two-year Associate Portfolio Manager (APM) Program in 2012, designed as an exceptional pathway for high-potential buy-side investors, elite sell-side trading professionals, or distinguished quantitative analysts across various hedge fund disciplines, including discretionary macro, systematic macro, emerging markets macro, systematic trading, equity long-short, and event-driven strategies.The APM Program provides immersive exposure and rigorous training aimed at enhancing participants' investment acumen, ultimately facilitating their advancement to senior Portfolio Manager roles within Caxton. Notably, over a quarter of our current Portfolio Managers have successfully risen through this program, attesting to its effectiveness and significance.Candidate Profile:We are in search of candidates with 3 to 10 years of experience in asset management, hedge funds, and/or market-making. The ideal candidate will possess expertise in and ideally have direct experience implementing proposed investment strategies and associated markets. We value entrepreneurial risk-takers eager to develop and expand their investment strategies. The ability to work autonomously while also collaborating with diverse stakeholders is essential, as is a demonstrated commitment to ongoing growth and professional development.If you are passionate about the financial markets, possess a robust work ethic, and meet the outlined criteria, we encourage you to apply. Please submit your CV, investment track record (if available), and a comprehensive outline of your proposed investment strategy. A detailed strategy outline is a critical component of your application.We look forward to exploring your potential and welcoming you to contribute to the esteemed legacy of Caxton Associates.

Company Overview:Founded in 1983, Caxton Associates is a distinguished global trading and investment firm, boasting offices in major financial hubs including London, New York, Monaco, Singapore, and Dubai. Our core mission is to expertly manage both client and proprietary capital across a diverse array of liquid global hedge fund strategies. With a strong commitment to alpha generation, we leverage our broad trading mandate to navigate global markets and instruments effectively.The Role:We are actively searching for seasoned Portfolio Managers with experience across various strategies, including but not limited to:Discretionary MacroEmerging Markets MacroEquity Long/ShortEvent-DrivenFixed Income Relative ValueMedium-Frequency SystematicCommoditiesIn this pivotal role, you will manage a substantial capital allocation, apply rigorous risk management techniques, and thrive in our collaborative, research-centric environment. We prioritize teamwork, encouraging ongoing discussions about macroeconomic trends, geopolitical shifts, and financial market dynamics. We seek professionals capable of providing unique insights within their investment domain and contributing to the firm's overarching strategic vision, harnessing collective expertise to drive alpha generation.Key Responsibilities:Independently oversee a significant capital allocation by formulating, executing, and monitoring an alpha-oriented investment strategy.Develop portfolios that aim to achieve asymmetric returns with minimal correlation to traditional markets by leveraging variant market perspectives.Implement comprehensive risk management, consistently evaluating the value of all positions and investment hypotheses.Collaborate within a global team, enhancing and benefiting from shared insights and collective knowledge.Adhere strictly to all industry regulations and internal risk management protocols.

About Caxton Associates:Founded in 1983, Caxton Associates is a prestigious global trading and investment firm with a strong presence in major financial hubs, including New York, London, Bengaluru, Monaco, Singapore, and Dubai. The firm specializes in managing client and proprietary capital through a diverse suite of investment products tailored to meet the unique requirements of its investors. Utilizing a multi-portfolio manager approach, Caxton excels in discretionary global macro investing, drawing on its extensive expertise across various asset classes and markets.About the Role:We are on the lookout for a dedicated Trading Support Engineer to become an integral part of our London Tradeflow team. In this role, you will play a crucial role in supporting front-office trading operations, ensuring the seamless flow of orders and executions across both internal and external trading systems.This hands-on production support position emphasizes monitoring live trading activities, analyzing order and execution flows, and troubleshooting any issues related to FIX connections and internal systems. You will collaborate closely with trading, operations, and global technology teams to guarantee timely and accurate trade processing.Success in this role demands meticulous attention to detail, excellent communication skills, and the ability to remain composed in fast-paced, time-sensitive environments.Responsibilities:As a valued member of the Tradeflow support team, your key responsibilities will include:Monitoring and supporting trade, order, and execution flows across FIX connections, internal order management systems, and external brokers and trading venues.Analyzing FIX message traffic (including orders, cancellations, rejections, and executions) to identify and resolve routing or workflow issues.Assisting with Bloomberg AIM order and execution workflows.Investigating trade breaks, discrepancies, and missing or delayed executions.Providing support for troubleshooting session drops, connectivity issues, and counterparty rejections.Coordinating with brokers, trading desks, and operations teams to address daily production challenges.Escalating incidents as necessary and providing clear status updates to stakeholders.Maintaining documentation and contributing to operational runbooks and procedures.Requirements:1–3 years of experience in supporting trading, middle office, or financial systems.Fundamental understanding of FIX messaging and the order-to-trade lifecycle.Familiarity with financial markets and execution workflows.Strong analytical and problem-solving abilities.Basic scripting skills, preferably in Python.Proficiency with log analysis and monitoring tools.Experience with version control systems (e.g., Git).Some knowledge of SQL and relational database schemas would be advantageous.Excellent written and verbal communication skills.Ability to work efficiently under pressure in time-sensitive trading environments.Exhibits and adheres to the highest ethical standards.

Company Overview:Founded in 1983, Caxton Associates is a distinguished global trading and investment firm with offices in key financial hubs such as London, New York, New Jersey, Monaco, and Singapore. Our core business revolves around managing client and proprietary capital through innovative global macro hedge fund strategies. With a wide-ranging mandate, we engage in trading a diverse array of global markets and financial instruments.About the Associate Portfolio Manager Program:At Caxton Associates, we pride ourselves on nurturing exceptional investment talent. Established in 2012, our Associate Portfolio Manager (APM) Program is designed to cultivate the next generation of Portfolio Managers. This program offers an incredible opportunity for high-potential investors, accomplished sell-side professionals, and quantitative analysts to refine their investment skills.Our APM Program has proven to be a successful talent pipeline, with over 25% of our current Portfolio Managers having joined through this initiative, including many of our most senior risk takers.Position Overview:We are currently on the lookout for experienced systematic portfolio managers and/or analysts. Candidates should demonstrate proficiency in utilizing various asset classes with a flexible approach to holding periods. Our primary focus is on technical expertise and a solid grasp of quantitative and systematic investment methodologies.If you are eager to join this program, please submit your CV, investment track record (if available), and a comprehensive outline of your proposed investment strategy.

Role overview Genomics England is looking for a Software Engineer with solid Python experience to help create software that drives genomics research and benefits patient care. The team combines engineers and scientists who work together to build scalable tools that advance the organization's mission. What you will do Develop and maintain software applications using Python for genomics-related projects. Collaborate with fellow engineers and scientists to design solutions that back both research and clinical goals. Contribute to technology projects aimed at improving patient outcomes. Location This role is based in London.

About AboundAt abound, we are revolutionizing the landscape of consumer lending across the UK and beyond. By leveraging cutting-edge AI and Open Banking data, we strive to make fair and affordable personal finance accessible to a wider audience. Unlike traditional lenders who heavily depend on credit scores, we analyze the complete financial picture of our customers—considering their spending patterns and repayment capabilities—to build a nuanced understanding of their unique financial situations.Our approach has proven successful at scale. We have facilitated over £1.3 billion in loans directly to customers while achieving exceptional credit performance—for every 10 defaults anticipated by the industry, we experience only 3. Remarkably, we reached profitability just 2.5 years post-launch.With backing from over £2 billion from prestigious investors including Citi, GSR Ventures, and Deutsche Bank, we are recognized as one of Europe’s fastest-growing fintech companies (Sifted, CNBC). As we expand into new markets and product lines, we are on the lookout for driven individuals eager to learn, take ownership, and grow alongside us.We are seeking a talented Senior Python Engineer to join our engineering team. In this role, you will collaborate closely with our Finance team to design and implement automation solutions that enhance our core financial operations. You will be responsible for translating business needs into robust, maintainable systems that increase accuracy and efficiency across critical workflows.This position requires a candidate who blends strong technical acumen with a desire to understand the business intricacies. You will be empowered to independently scope and execute changes, manage stakeholder expectations, and ensure every enhancement is durable. Your contributions will play a vital role in maintaining the smooth and scalable operation of our financial processes.We value engineers who take initiative, enjoy tackling complex challenges, and excel at clarifying ambiguous requirements. You will thrive in our environment if you are motivated by creating systems that deliver tangible business impact, can articulate technical concepts to non-technical partners, and take pride in producing high-quality, well-designed code.At abound, you will immerse yourself in a culture that champions autonomy, curiosity, and continuous improvement. You will engage with a modern Python-based tech stack, gain in-depth insights into how financial operations function in a rapidly growing lending business, and have the opportunity to enact significant technical changes in collaboration with experienced stakeholders.

Role OverviewWe are seeking a talented Software Engineer specializing in Python to join our team at cfpenergy. In this pivotal role, you will be instrumental in designing, developing, and scaling our data infrastructure, which is crucial for driving our products and informed decision-making processes. You will help define the flow of data throughout the organization, ensuring it is efficiently ingested, processed, and transformed into actionable insights. Collaborating with developers, analysts, and trading teams, you will ensure our data is not only reliable and accessible but also future-proof. This position seamlessly blends hands-on engineering with architectural insight, allowing you to participate in design discussions, enhance data pipelines, and guide our technical strategy. We are looking for someone who takes initiative, relishes solving intricate problems, and can work collaboratively across various systems and teams to create meaningful impact.Key ResponsibilitiesArchitect, develop, and uphold robust applications within a domain-driven ecosystem.Engage in architectural dialogues and influence the long-term technical strategy.Manage tasks from requirements gathering to completion, showcasing creativity and adhering to coding standards.Create well-structured data models and maintain comprehensive documentation in collaboration with your team’s data engineers.Work closely with data engineers, developers, analysts, and trading teams to gather requirements and deliver dependable, well-architected data solutions.Identify and implement enhancements to performance, automation of manual tasks, and improvements in data quality and reliability across systems.Core Skills & ExperiencesCollaborative mindset: We seek individuals who are not only adept but also enjoyable to collaborate with, promoting a positive team culture through open communication.Analytical thinking: Accuracy and performance are central to our operations; your curiosity, structured approach, and meticulous attention to detail will drive every challenge.Problem-solving skills: You should be comfortable navigating complex systems to diagnose root causes while maintaining composure under pressure, striving for elegant, sustainable solutions.Effective communication: Your ability to articulate complex technical concepts clearly will bridge the gap between technical and non-technical teams, ensuring alignment.

Corgi develops insurance products for technology startups using AI, Django, and Stripe. Backed by $108M in funding and licensed as a carrier, the company is expanding throughout the UK and EU. The engineering team builds new ways to deliver insurance, focusing on rapid product development and real-world impact. Role overview This Python Engineer role is based in London and suits builders who enjoy taking ideas from concept to launch. The team values independent thinkers who have shipped products, whether side projects, weekend experiments, or anything with real users. Engineers here often work autonomously and see projects through from start to finish. What we look for History of independently building and launching projects Ability to work across the stack and learn quickly Delivers results in short cycles, progress is measured in hours and days Strong opinions, but open to better approaches Focus on outcomes, not titles; low-ego attitude Work culture Quick decision-making; perfection is not required Frequent product launches and improvements Ship-and-iterate approach, rather than long review cycles High energy during launches, steady pace between projects Transparent, public-first decision-making Internal competition helps raise standards This position fits those who want to make a real impact, not those seeking to coast. Behaviors that won’t fit Avoiding accountability or engaging in office politics Taking feedback personally instead of using it to improve Adding unnecessary complexity Missing agreed deadlines How to apply Send links to your GitHub, personal site, live projects, or anything you’ve built and launched Resumes are optional Email applications to: sergio@corgi.com If you cannot show evidence of shipped work, this role is unlikely to be a fit Location and compensation London-based (on-site or hybrid options) Base salary: £75,000 to £140,000, plus equity Salary depends on shipping ability, not job title

Join Nevis: Pioneering AI Wealth ManagementAt Nevis, we're on a mission to revolutionize wealth management through cutting-edge AI technology. Our innovative platform is designed to empower financial advisors, enabling them to enhance client relationships while our AI automates time-consuming workflows. As we build the future of wealth management, we have secured $40 million in funding from top-tier investors including Sequoia Capital, ICONIQ, and Ribbit, and are led by a talented team of ex-Revolut executives.Your Impact as a Software Engineer (Python)We are seeking a talented Software Engineer (Python) who is passionate about developing robust AI-driven platforms. In this key role, you will design and implement Python-based systems and services that drive intelligent workflows for leading financial firms. You will work on applied AI, data pipelines, model execution frameworks, and backend components that support our innovative AI products.If you thrive in a fast-paced environment, love creating production-grade AI solutions, and are eager to see your ideas come to life quickly, Nevis is the place for you. You'll join a world-class engineering team dedicated to building scalable AI systems.Your ResponsibilitiesDesign and enhance Nevis’ Python-based AI platform, enabling core workflows and agentic automation.Develop model orchestration, data processing pipelines, and execution runtimes for our applied AI features.Create scalable APIs and services that facilitate rapid development and deployment of AI systems.Architect systems for model inference, prompt execution, and multi-step agent reasoning.Maintain high engineering standards through clean code practices and CI/CD workflows.Collaborate with AI engineers, product managers, and designers to deliver impactful features used by thousands.Take ownership of greenfield AI platform components, from architecture to production.Engage in design and code reviews that shape Nevis’ technical future.

Talan is looking for a Python Developer to join its London office. This position centers on building and maintaining applications for a variety of client projects. The work includes both new software development and ongoing support, with a strong emphasis on delivering solutions that meet business needs. Key responsibilities Design, develop, and maintain Python-based applications Collaborate with colleagues across different teams to achieve project objectives Take part in planning and implementing technical solutions Support existing systems and address issues as they come up Role overview This role involves hands-on development as well as troubleshooting and supporting live systems. Working in a collaborative environment, the Python Developer will contribute to projects that serve a diverse group of clients.

Role overview LMAX seeks a C++ and Python Developer to join its Middle-Office Team in London. This group works alongside infrastructure, research, and treasury teams to advance trade reconciliation, back-testing frameworks, and trading monitoring systems. The main focus lies in data engineering and building trading systems from the ground up. Prior experience in finance or trading is not required for this position. Team approach The team operates at the intersection of C++ and Python. C++ powers the infrastructure, while Python supports research tasks like analysis and automation. Bridging these languages is central to the role, supporting integration and collaboration across disciplines. Performance and optimization Managing financial data introduces technical challenges, particularly around throughput. The team values software performance but never at the expense of maintainability. Developers work closely with the codebase to understand, optimize, and refine systems. Testing practices Comprehensive testing is a core part of the workflow. The team maintains test suites that include unit tests and full end-to-end simulations. Continuous integration runs these tests every 15 minutes, ensuring rapid feedback and no overnight waits for results. What you will do Write clear, well-structured, and thoroughly tested code in C++ and Python Develop software solutions that handle high throughput Pair program to share knowledge and prevent silos Design and implement features to enhance safety, performance, and usability Create interface code connecting C++ and Python using pybind Requirements Strong C++ skills, especially with modern C++ on Linux or UNIX Python development experience, including Numpy, Pandas, and SQL Experience with automated testing for both C++ and Python Ability to interpret business requirements and build effective systems Skilled at designing simple, well-documented, and maintainable solutions Comfortable working independently with minimal supervision No finance or trading background needed Bonus skills Experience with test-driven development and testing across multiple system levels Location This position is based in London, England, United Kingdom.

Hello from Team Granola! If you haven't yet, be sure to explore what we are creating, and discover why joining us is a great choice.We are in search of a proactive AI Engineer who is passionate about leveraging the latest advancements in Large Language Models (LLMs) to design and develop user-centric products.In this pivotal role, you will keep abreast of the latest LLM trends, build robust evaluation frameworks for AI features, and apply your expertise with a focus on product outcomes. As a key member of our founding team, you will engage directly with users to understand their challenges and swiftly develop features that provide substantial value. Your contributions will be crucial in driving Granola towards a significant growth milestone.Key Responsibilities:Lead the end-to-end development and implementation of LLM-based features.Establish and manage evaluation frameworks for prompt iteration and semantic retrieval.Enhance embeddings and vector stores for optimal performance and scalability.Engage with users to identify their needs and devise effective solutions.Stay informed on emerging trends in LLMs and applied AI methodologies.Collaborate with a diverse team of engineers, product managers, designers, and other stakeholders to develop a cutting-edge product.Qualifications:Proven engineering experience in tech and product-focused organizations.Experience in deploying multi-provider LLM-based solutions in production (e.g., OpenAI, Anthropic, Google).Proficiency with LLM infrastructure platforms (prompt management, logging/tracing, evaluations).Experience in designing large-context LLM systems (RAG, knowledge graphs, hybrid search, memory).Expertise in building features end-to-end using TypeScript, React.js, and Node.js.Personal Attributes:Are primarily a builder with a passion for creating impactful solutions.Excited about working in-person at our London office (most of the time).Thrives in a startup environment, embracing challenges and opportunities.

Are you passionate about harnessing the power of large language models (LLMs) and artificial intelligence (AI) to enhance search discoverability? Join Flo Health as our LLM & AI Search Discoverability Manager. In this pivotal role, you will lead initiatives to optimize our search systems, ensuring that users can effortlessly find the information they need. Collaborating with cross-functional teams, you will drive innovation and implement cutting-edge AI solutions.

Role overview Legal & General seeks a Full-Stack Engineer to build and maintain scalable web applications. This position centers on Python and TypeScript, with a strong emphasis on teamwork and collaboration. Engineers in this group play a key part in projects that drive the company's digital growth. What you will do Develop and maintain web applications using Python and TypeScript Work alongside cross-functional teams to deliver software solutions Support active projects and contribute ideas for new initiatives Location This position is based in London.

Jobs for Humanity is hiring an Associate Engineer in London. This entry-level position gives early-career engineers a chance to work alongside experienced colleagues on projects that support inclusivity and accessibility. Role overview The Associate Engineer role focuses on hands-on learning and teamwork. Expect to contribute to ongoing projects, share ideas, and help advance solutions that make a difference in people's lives. What you will do Work with a team of engineers on initiatives that foster accessibility and inclusion Support project development from planning through execution Learn from experienced professionals and apply new skills in real-world settings Location This position is based in London.

Join Talan as an eTrading Python Production Engineer in London, where you will play a crucial role in enhancing our electronic trading systems. You will be responsible for developing, deploying, and maintaining high-quality code that ensures the reliability and performance of our trading platforms. Collaborate with cross-functional teams to implement robust solutions that meet business requirements and optimize trading workflows.

We are looking for a Senior Staff Python Software Engineer to join our dynamic team at abound. In this role, you'll leverage your expertise in Python to design, develop, and maintain high-quality software solutions that meet our clients' needs. You'll work closely with cross-functional teams to deliver innovative products that drive our mission forward.

Role OverviewJoin us at Skiller Whale as a Software Engineering Coach specializing in Generative AI and Large Language Models (LLMs). We are in search of seasoned lead engineers or those with equivalent experience to facilitate focused micro-workshops designed for small groups of software engineers. Each engaging session lasts up to 90 minutes and is conducted remotely through our app, utilizing high-quality instructional materials crafted by our team.In this role, you will share your expertise and passion for software engineering, ensuring that participants gain a profound understanding of the topics covered—learning not just the what and how, but the why behind them. You will work with both senior and junior engineers, addressing thought-provoking questions related to our curriculum and assisting learners in enhancing their proficiency with LLMs. This position requires a skill set more akin to pairing or technical mentoring than traditional classroom instruction.About Skiller WhaleAt Skiller Whale, we revolutionize the capabilities of tech teams through live, interactive sessions led by subject-matter experts. Developers participate in weekly or bi-weekly sessions lasting 60-90 minutes, where they tackle challenging exercises under expert guidance, gaining insights and answering complex questions. Our learners consistently rate us highly, with an average score of 4.8 out of 5, showcasing our measurable impact on the teams we engage with.What our learners say:| "The real-time feedback loop of learning something, putting it into practice, and receiving insights beyond just 'it works' has been the most rewarding learning experience I've encountered!"| "I appreciated the opportunity to ask any questions, and I learned new things even about a technology I've used for 15 years!"| "The standout feature of Skiller Whale is the exceptional quality of our coaches. Their deep knowledge of Python's internals and system architecture is invaluable."What We're SeekingIf you are passionate about nurturing the skills and understanding of others and possess experience in at least four of the following areas, we encourage you to apply: Clarifying fundamental machine learning concepts for others. Understanding LLM internals, including transformer components. Expertise in prompt engineering. Experience with Agentic AI and AI agent IDE integrations. Proficiency in coding with LLMs, including setting up Cursor/Copilot configurations and crafting prompts for coding and debugging. Integrating and pipelining with LLMs, such as using langchain. Customizing LLM tools, including fine-tuning and employing RAG systems. Applicants should possess substantial expertise and real-world experience, enabling them to provide nuanced answers to complex inquiries and elucidate advanced topics effectively.