Mid-Senior Python Developer at 3facesrecruitmentlimited | City of London

Position Overview: Join our dynamic Alpha Data team as a Software Developer specializing in Python. You will play a pivotal role in delivering extensive data solutions to our global clientele. As a key member of our expanding Data team, you will develop deep technical expertise and foster collaborative relationships with quantitative researchers, traders, and peers throughout our Technology division. The Alpha Data teams at Squarepoint are adept at rapidly deploying invaluable data across the organization. Our ingestion pipelines and data transformation processes are designed for resilience and maintainability, with data models crafted in close partnership with researchers to facilitate efficient query construction and alpha generation. We promote scalability by building innovative frameworks, libraries, and services that enhance team productivity, quality of work, and code integrity. We prioritize teamwork and collaboration, reward excellence, and value diverse perspectives and creative solutions. Our culture emphasizes continuous learning, development, and growth. Take shared ownership of our expanding array of data pipelines. Contribute innovative ideas for new abstractions and enhancements, making a significant positive impact on our global team. Design, implement, test, optimize, and troubleshoot our data pipelines, frameworks, and services. Collaborate with researchers to integrate new datasets. Lead production support operations during regular business hours.

Application Notice: Please apply only to the position that aligns most closely with your skills and experience. If our team believes you are better suited for a different role, we will contact you regarding that opportunity.Position Overview:At Squarepoint Capital, we leverage Python to develop essential software that addresses pivotal challenges daily. You will engage with a diverse array of systems that drive our trading success, including core tools and frameworks, data pipelines that support predictive models in research and trading, and software products utilized globally by traders and researchers.Your collaboration with seasoned software developers and quantitative researchers will contribute to the ongoing expansion of our investment business, tackling problems at scale, while also providing a unique opportunity to learn from some of the industry's most talented professionals.

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.

Position Overview:We are in search of a skilled and enthusiastic Software Developer to become an integral part of our expanding team. In this pivotal role, you will be instrumental in the design, development, and maintenance of Squarepoint's internal frameworks, services, and platforms that drive our business operations. This is a fantastic opportunity to work with advanced technologies, directly influencing the efficiency and productivity of both our investment and technology teams at Squarepoint.Design, develop, and maintain high-quality, scalable, and high-performance software solutions.Contribute to the creation of company-wide productivity tools, frameworks, and platforms that enhance operations across the organization.Collaborate with fellow developers and stakeholders to collect requirements, design solutions, and implement features.Write clean, well-documented, and testable Python code.Engage in code reviews and help elevate code quality and development practices.Diagnose and resolve technical issues promptly and effectively.Stay informed about the latest advancements in Python technologies and industry best practices.

Join Vortexa, a dynamic and rapidly expanding technology firm, dedicated to bridging the significant information gap in the energy sector. Leveraging extensive satellite data combined with cutting-edge artificial intelligence, we provide a revolutionary perspective on global seaborne energy movements in real-time. Our mission is to enhance transparency and efficiency within energy markets, ultimately benefiting society at large.The Data Platform Team at Vortexa oversees all aspects of our data, spanning from raw satellite AIS/imaging data to unstructured textual and graphical maritime data, including fixtures, port lineups, and customs filings. We also manage highly structured datasets, such as price and supply-demand forecasts, alongside modeling global energy flows and tanker fleet distributions.Our team has developed a diverse array of procedural, statistical, and machine learning models that enable us to deliver the most accurate and comprehensive insights into energy flows. We take pride in applying advanced research to real-world challenges in a sustainable, robust, and maintainable manner, with our data quality rigorously evaluated by seasoned market and data analysts.As a Software Engineer, you will play a vital role in designing and developing the infrastructure and applications necessary for the design, deployment, and benchmarking of both existing and new pipelines and machine learning models. Collaborating with software engineers, data scientists, and market analysts, you will ensure the reliability and fault tolerance of every component in the team’s data pipelines, ensuring our systems maintain 100% uptime.

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.

Position Overview: The Data Infrastructure team is at the forefront of managing our service-oriented data storage systems. We develop and implement microservices that deliver high-performance solutions for accessing the substantial datasets that drive our trading and research operations. We are seeking a skilled Software Developer with a robust C++ background to enhance our team. In this pivotal role, you will design, develop, and maintain the components of our data infrastructure that enable effective data processing and analytics pipelines. You will collaborate closely with data engineers, data scientists, quantitative researchers, and other key stakeholders to ensure seamless and reliable data retrieval, processing, and storage. Design, develop, and uphold data infrastructure microservices using C++ for processing and analyzing extensive data sets. Optimize microservices for maximum performance and scalability, ensuring efficient data processing. Debug and troubleshoot software issues, delivering timely solutions. Stay informed on industry advancements in C++ programming and data engineering technologies. Write clean, maintainable, and efficient code in accordance with best practices and standards. Engage in code reviews to uphold code quality and consistency. Collaborate with support teams to ensure smooth deployment and operational functionality of microservices. Contribute to the overarching software architecture and design of data processing and analytics pipelines.

Position Overview Join our dynamic Data Engineering team at Squarepoint Capital, where we harness vast data sets to drive insights and innovation. As a Data Development Integrator, you will play a crucial role in collaborating with various stakeholders to ensure the delivery of high-quality data for both production and research purposes. Your Responsibilities: Manage vendor relationships for the Data Engineering team, engaging continuously with the Data Onboarding team and vendors to navigate incoming data ingestion projects and changing business priorities. Lead the Data Engineering triage process: scope and validate new initiatives, ensuring they are allocated to the appropriate implementation teams. Cultivate collaboration within Data Engineering by building strong relationships with global leads and business stakeholders, facilitating effective teamwork through a deep understanding of people, challenges, and workflows. Enhance data quality via lifecycle management of vendor datasets, implementing technical requirements through configuration and collaborating with data engineers for more complex adjustments.

Python Developer - Data & Analytics Team - Options Market Making Maven is a leading proprietary trading firm dedicated to optimizing internal capital across discretionary, systematic, and market-making strategies. Our team comprises experienced traders, engineers, and technologists, all committed to advancing our role as a top liquidity provider in the global derivatives market. Our engineering teams are at the forefront of developing innovative execution, pricing, and data systems that revolutionize the functionality of financial markets. As a Python Developer, you will collaborate closely with traders, quantitative researchers, and fellow developers to create reliable, timely, and accurate data and analytics solutions for our trading and research teams. Our data pipelines process terabytes of exchange traffic, executing numerous real-time transformations. We conduct analyses that range from nanosecond-level investigations on low-latency trading systems to research on pricing algorithms and trading strategies.

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.

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.

Position Overview: The Quantitative Development team collaborates closely with quantitative researchers to architect, implement, deploy, and utilize cutting-edge software for research and trading purposes. As an integral part of the technology team, we embrace modern software development methodologies and work alongside peers to innovate and enhance these tools for broader applications. Quantitative developers lead cross-functional initiatives with both technologists and quantitative researchers across diverse asset classes to fulfill Squarepoint’s strategic objectives. Engage with quantitative researchers to design and construct robust and scalable workflows for research and trading. Work collaboratively with team members and technical peers to ensure global consistency and maximize the reuse of software components. Take full ownership of projects throughout their complete engineering lifecycle. Provide level 2 support for mission-critical components.

Join our dynamic team at Talan as an eTrading Python Developer where you will play a crucial role in enhancing our trading systems. You will collaborate with a talented group of engineers and developers to deliver innovative solutions for our clients in the financial sector. Your expertise in Python programming will help us streamline our trading processes and improve system performance.

Join Our TeamAs a Junior Software Engineer specializing in Data Products at Yapily, you will be instrumental in developing and expanding our cutting-edge data platform. This entry-level role is ideal for individuals with a solid foundation in Java or Python who are enthusiastic about diving into the field of Data Engineering.Your contributions will be vital in crafting high-performance data pipelines, robust billing infrastructure, and intuitive self-service data APIs. This position provides a unique opportunity to engage with the Google Cloud Platform (GCP) stack, allowing you to learn how to create data systems that enable engineering teams to transform raw data into actionable insights.Key ResponsibilitiesData Pipeline Support: Collaborate in the design and upkeep of scalable data ingestion and processing systems using ETL/ELT methodologies.API Development: Assist in the creation and documentation of APIs for a seamless data experience for various stakeholders.Database Management: Work with SQL and NoSQL databases, optimizing schemas and crafting efficient queries to handle high-volume transactions.Cloud Resource Management: Learn to deploy and maintain software utilizing GCP services such as Pub/Sub, BigQuery, and Cloud Storage.Billing Infrastructure: Support the development of a reliable billing architecture in an event-driven environment.Cross-Functional Collaboration: Work alongside BI, infrastructure, and product teams to gather data requirements and deliver technical solutions.Quality Assurance: Engage in testing, monitoring, and logging to ensure system resilience.Continuous Learning: Participate in code reviews and agile ceremonies to enhance your technical skills and product knowledge.

At Suade, we are pioneering cutting-edge regulatory technology designed to avert future financial crises. Our success hinges on the collaborative efforts of our engineers and domain experts, who work together to transform complex financial and regulatory concepts into robust code. As a RegTech Engineer, you will play a vital role in driving the continuous growth of our business.This position is ideal for seasoned software engineers who have a passion for structuring and solving real-world challenges through technology. If you possess an eagerness to learn about finance, a strong analytical mindset, and enjoy collaborating with non-technical teams to convert their insights into functional code, we would love to connect with you.Please note that we cannot provide visa sponsorship for this role. Applications from candidates requiring visa sponsorship will not be considered.Suade is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without bias.

Role Overview:We are looking for a talented Data Engineer to contribute significantly to a vital client initiative. This role will involve the design, construction, and optimization of data pipelines within a cloud-centric data and analytics ecosystem. The ideal candidate will possess a solid foundation in data engineering principles, a commitment to delivering reliable solutions, and the capability to work collaboratively with both technical and business teams.Key Responsibilities:Data Engineering & Pipeline DevelopmentDesign, build, and sustain scalable data pipelines for both batch and streaming workloads.Develop robust ingestion, transformation, and curation processes using contemporary data engineering tools and methodologies.Create and maintain data models, curated datasets, and integration layers to facilitate analytics and reporting.Enhance data processing for optimum performance, reliability, and cost-effectiveness.Data Quality, Governance & SecurityEstablish data quality checks, validation processes, and automated monitoring.Ensure comprehensive and accurate data lineage, metadata management, and documentation.Implement necessary security measures, including role-based access controls, data masking, and protection of sensitive information.Cloud & Platform EngineeringUtilize cloud-native services for storage, compute, and workflow orchestration.Oversee pipeline and platform performance, identifying and resolving any issues or bottlenecks.Assist in configuring environments, standardizing processes, and implementing best practices.DevOps, Automation & ObservabilityLeverage CI/CD practices to deploy code, configurations, and data assets across different environments.Maintain version control, engage in code reviews, and adhere to release processes.Construct monitoring, alerting, and logging systems to support high-quality operations and quick issue resolution.Collaboration & DeliveryWork closely with technical and business stakeholders to ensure alignment and successful project delivery.

Role overview Wise is looking for a Senior Data Platform Engineer I to help shape and improve the database platform. This position focuses on building and supporting data infrastructure, with Python as a core tool. The engineer will help ensure the platform is reliable and ready for new solutions.

Role overview Wise is hiring a Data Platform Engineer focused on the Database Platform, working primarily with Python. This role centers on improving data processes, maintaining strong performance, and supporting scalable solutions. The work involves close collaboration with teams across the business to deliver reliable and efficient data systems. What you will do Optimize and streamline data workflows for better performance and scalability Work with cross-functional teams to implement effective data solutions Contribute technical expertise to improve Wise’s data architecture Location This position is based in London.

Skin + Me is a pioneering technology start-up dedicated to transforming personalized skincare solutions. We have successfully delivered millions of treatments through our diverse multi-brand ecosystem, which includes Skin + Me, Hair + Me, and Renew + Me. Our proprietary technology stack supports everything from our e-commerce platform to in-house manufacturing processes.As we enter an exciting new growth phase, we are seeking a Senior Full Stack Software Engineer to join our dynamic and high-impact team. We leverage cutting-edge tools like Claude Code and Cursor to enhance our modern, fast-paced workflows.Our MissionAt Skin + Me, we prioritize tangible results over mere hours logged. Your objective will be to utilize advanced tools to streamline mundane tasks, allowing you to focus on tackling complex challenges related to scalability, experimentation, and architecture.Your ResponsibilitiesAgentic Workflows: Employ agentic tools to plan, refactor, and deploy features throughout our Python/React stack, significantly enhancing your technical capabilities.Full-Stack Ownership: Architect and implement comprehensive features, managing everything from backend logic and database designs to contemporary frontend user experiences.Drive Engineering Advancement: Contribute to shaping our AI-native development standards and guide the team towards high-velocity delivery practices.Who You AreAI Proficiency: You are adept in utilizing agentic AI, capable of managing edits across multiple files and discerning any inaccuracies from language model outputs.Pragmatic Architect: With your senior experience, you know when to rely on automated tools and when to intervene personally. You appreciate clean code, robust type systems, and comprehensive testing.High Agency: You are a proactive problem-solver who flourishes in a fast-paced, self-directed environment.Technical Skills RequiredExpertise in Python and associated web development frameworks, such as Flask and Django.Experience with relational databases (MySQL preferred) and ORM frameworks (e.g., SQLAlchemy, Alembic).Proficient in TypeScript and React.Experience in building and maintaining frontend design systems.Familiarity with containerization (Docker) and cloud platforms (preferably AWS).Understanding of modern web architecture and performance optimization techniques.Why Join Skin + Me?High Leverage: We equip you with the best tools and the freedom to utilize them effectively.Make a Difference: Be part of a revolutionary company dedicated to enhancing millions of lives.Equity: Every team member has a stake in our success.Perks: Enjoy free breakfast and lunch on office days, a dog-friendly workplace, 25 days of holiday, and an annual £500 development budget.