Mid-Senior Python Developer

About the Role:Join our client, a premier provider of online Brand Protection solutions, safeguarding the intellectual property of over 600 brands across the globe.As a vital part of our team, you will be instrumental in the design and development of systems dedicated to monitoring and enforcing against counterfeit brand-name products and digital content. Your expertise will be leveraged to enhance both the user interface and back-end functionalities, aligned with our product roadmap.Responsibilities:Engage in the complete Agile software development lifecycle.Architect and develop innovative features.Continuously refine and improve the existing codebase.Diagnose and resolve application functionality issues while providing support and troubleshooting for both the development team and clients.Your Profile:A genuine passion for technology and working on cutting-edge software.Self-driven with strong prioritization skills, able to meet deadlines and manage evolving priorities independently and collaboratively.Enthusiastic and committed to delivering high-quality work.Collaborative mindset with a willingness to find common ground and solutions.Results-driven and thrives in fast-paced environments, maintaining composure and sound judgment under pressure.Exceptional interpersonal and communication skills.

Join our client, a leading global organization, as an experienced Business Intelligence Developer. In this dynamic and fast-paced role, you will leverage a variety of technologies to design complex data models and create insightful visualizations and reporting dashboards.Role OverviewAs a successful BI Developer, you will gain valuable experience across diverse technologies and data. Your primary responsibilities will include developing intricate data models and crafting compelling visualization and reporting dashboards.Key Responsibilities- Utilize Alteryx and other data preparation tools to author workflows and build robust data models that support complex visualizations and analytics.- Demonstrate expertise in Tableau and/or Power BI to create meaningful visual representations for reporting and management dashboards. You should be adept at distinguishing between report and dashboard design, applying best practices, and creating custom visuals that drive decision-making.- Exhibit a strong understanding of data management principles, relational database concepts, data cleansing techniques, dimensional modeling, and measure/metric calculations.- Employ scripting languages such as VBA, JavaScript, or Python to operationalize processes as needed.- Engage in requirements gathering and stakeholder management, showcasing an eye for commercial opportunities, excellent communication, and organizational skills. Maintain a tenacious appetite for learning and applying new technologies.- Collaborate effectively in teams, both in-person and virtually, while also demonstrating the ability to work autonomously and take ownership of your work.

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.

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 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.

Join Updraft: Transforming Financial Futures!At Updraft, an award-winning fintech company authorized by the FCA, we are on a mission to revolutionize how individuals perceive and manage their finances. Our innovative platform automates everyday financial decisions, making it easier for users to handle credit cards, overdrafts, and loans. Experience a comprehensive spending overview across all financial accounts with Open Banking technology. Access a complimentary credit report with personalized tips to enhance your credit score. Leverage AI-driven financial planning tailored to help users manage expenses, eliminate debts, and boost credit ratings. Utilize intelligent lending solutions designed to lower the cost of credit. With over 800,000 users and a remarkable reputation within the UK fintech landscape, Updraft has helped individuals convert approximately £500 million in high-cost credit card debt into more manageable options, paving the way for better financial health. Rated 4.8 on Trustpilot, 4.8 on the Play Store, and 4.4 on the iOS Store by our satisfied customers. Recognized as a participant in the Technation Future Fifty 2025, a prestigious program that supports innovative startups on their journey to IPO. Featured in the Sifted 100 UK startups list for two consecutive years (2024 and 2025). We are seeking talented professionals to join us in our next growth phase, offering a unique opportunity to make a measurable impact. Expect a hybrid work culture that fosters collaboration across functional teams, generous learning budgets, wellness benefits, and the freedom to innovate and directly influence our customers' financial journeys.Become part of our commitment to building a fairer credit system!

Join Mustard Systems, where we harness the power of statistical modeling to analyze sports events, enabling accurate predictions of future outcomes. By leveraging our proprietary datasets, sophisticated statistical models, and custom software solutions, we aim to deliver precise forecasts in the world of sports.We prioritize speed and real-world impact over perfection in code. If you are an engineer who excels at rapid problem-solving and thrives in a flexible, outcome-oriented environment, you'll find a home with us.Your Role:Enhance our connections to new liquidity providers using advanced web scraping and reverse engineering techniques.Create and maintain low-latency, real-time data feeds to support trading strategies based on extracted data.Improve system visibility for teams to gain insights into integration challenges and enhancements.Our agile methodology allows us to adapt plans as new information and opportunities arise. Developers play a pivotal role, taking complete ownership of their software from design through development, testing, review, and production support.Key Responsibilities:Design and Implement Impactful Features: Develop features that align with our business objectives, ensuring high-quality code that delivers measurable value.Collaborate on Code Quality: Review and test peer code to uphold functionality, maintainability, performance, and quality standards.Production Support: Take charge of your team’s software in production, ensuring stability and prompt resolution of any issues.Cross-Team Collaboration: Partner with other development teams on cross-functional projects, working alongside traders and quants to devise the best solutions to real business challenges.Participate in Out-of-Hours Support for our Software Systems.Core Technology Stack:Languages: Python (3.10+), JavaScript/TypeScript for frontend tasks, and Go for select infrastructure.Tools: RabbitMQ and Kafka for messaging, PostgreSQL and Redis for data storage.Environment: Linux servers.Observability: OpenTelemetry, Prometheus, Grafana, and Zabbix.Required Qualifications:Solid experience in software development, particularly with Python.A degree in Computer Science or a related quantitative field from a recognized university.Excellent communication skills, enabling you to explain complex technical concepts to both technical and non-technical audiences.Strong decision-making skills, with an ability to make informed trade-offs in implementation and architectural decisions, balancing innovation with practicality.Experience with web scraping and related technologies is essential.

We are seeking a talented Full Stack Developer to join our dynamic team at Vitol, where you will collaborate closely with various business lines. This role presents a unique opportunity to engage with both technical and non-technical experts to create innovative solutions and full-stack applications that are utilized globally across numerous commercial and operational desks. Your contributions will significantly influence decision-making through the development of cutting-edge solutions.In this role, you will play an integral part in transforming our existing application landscape. Your ability to swiftly comprehend business needs, communicate effectively, work autonomously, and rapidly prototype and iterate on new and existing requirements will be essential in delivering state-of-the-art solutions that empower our commercial teams.As a Full Stack Developer at Vitol, you will exemplify:Rapid Prototyping: Collaborate closely with operations and commercial teams to construct and support market-driven business development applications and enhance existing tools by swiftly iterating based on user feedback to create actionable, value-adding solutions.Project Management: Analyze ongoing business and user requirements while independently managing project lifecycles from start to finish within the team.Innovation: Propose innovative and reliable technical solutions that enhance existing processes or uncover new opportunities for the business.Platform Expertise and Integration: Develop a comprehensive understanding of Vitol's Management Information Systems (MIS) platforms and tools, including their functionalities and capabilities, to ensure their success.

Join Ratio Recruitment Ltd as a Mid-Level UX Developer where your creativity and technical skills will play a crucial role in shaping user experiences. You will collaborate closely with cross-functional teams to design interactive and user-friendly applications that delight users. This position offers an opportunity to work in a dynamic environment while contributing to exciting projects.

Join Our Team at WintermuteWintermute is a pioneering technology unicorn and a leading player in the algorithmic trading space, focusing on digital assets. We excel in providing liquidity across major cryptocurrency exchanges and trading platforms, deliver comprehensive OTC trading solutions, and actively support renowned blockchain projects as well as traditional financial institutions making their foray into the crypto realm. Additionally, our Wintermute Ventures division invests in promising early-stage DeFi projects.Founded in 2017, Wintermute has adeptly navigated the evolving landscape of the industry. Our culture merges the technology standards of high-frequency trading firms in traditional markets with the innovative spirit and entrepreneurial environment found in tech startups. We are passionate about the transformative power of blockchain and are committed to fostering a compliant and forward-thinking market in the digital asset space. For more insights, click here.Position OverviewWe are in search of a skilled Core Developer to join our dynamic development team. This role offers the opportunity to work within a focused, high-performing group that has a wide-reaching impact across various business sectors. The ideal candidate will be pragmatic, dedicated to producing clean and efficient code, and possess strong interpersonal skills, as collaboration with traders, C++ developers, quantitative researchers, and the DeFi Team is essential. While prior experience in crypto or finance is not a prerequisite, a solid technical foundation and the right mindset are crucial.Our primary services are developed in Python, though we also maintain high-performance infrastructures utilizing C++. We prioritize using the latest versions for both languages. Our systems operate on Linux, utilize PostgreSQL for database management, and incorporate several custom in-house solutions tailored to address challenges common in high-frequency trading.

Role Overview Talan is looking for a C# Developer in London. This role focuses on building, testing, and maintaining reliable software applications using C#. The position involves hands-on programming and close collaboration with colleagues from different teams. What You Will Do Develop and maintain software applications in C# Test new features and ensure software quality Work with cross-functional teams to gather requirements and design architecture Help implement systems that align with business goals Location This position is based in London.

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.

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.

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.

Join Our Team as a Senior React.js Developer in London!We are seeking a talented and experienced Senior React.js Developer to be part of our innovative team at Difrent, a leading arts provider located in the vibrant hub of London. In this role, you will engage in exciting projects from inception to completion, ensuring they are both technically sound and visually stunning.As a key contributor, you will craft elegant code and collaborate closely with clients on various agile projects, working alongside a multidisciplinary digital team to deliver top-notch products.

Join Our Innovative Team at FreetradeAt Freetrade, we're on a mission to simplify investing, making it accessible and affordable for everyone. Our goal is to empower individuals to maximize their savings and grow their wealth.We're building an exceptional team of innovators who are passionate about transforming the investment landscape. If you're someone who thrives on tackling challenging problems and crafting cutting-edge products, you will find your place here.The upcoming year, 2026, promises exciting developments for us. Following our partnership with IG Group, we will continue to operate independently while benefiting from their extensive resources and expertise.This year, we aim to elevate our offerings by introducing new features such as mutual funds, bonds, and family investment tools. We're also exploring the integration of AI to enhance our customer experience further.Why You Should Join Our Engineering Team?Become a crucial part of a team that is redefining the investment future. As a Software Engineer, you will be instrumental in creating and maintaining a robust and scalable platform that serves thousands of users daily. We embrace complex technical challenges, foster innovation, and develop solutions that make a tangible difference. Here, your contributions will influence investment decisions throughout the UK. Join us to transform ideas into reality.We are on the lookout for a talented Mid-Level Software Engineer to join our Backend Engineering team.Our Primary Tech Stack:NodeJS/TypescriptGoogle Cloud PlatformPostgreSQLKey Responsibilities:Deliver high-quality software solutions within set timelines, tackling complex problems by proposing multiple solutions and evaluating trade-offs to assist your team in making sound technical decisions.Address technical challenges by providing scalable and maintainable solutions efficiently, considering trade-offs.Understand the core features and KPIs of your product, collaborating closely with the Product Manager to drive product development.Be prepared for on-call responsibilities, effectively responding to high-priority issues and knowing when to escalate them.About You:You have a solid background in software engineering, with experience in the technologies we use.

We are seeking a talented and experienced Front End Developer specializing in React.js to join our dynamic team. In this role, you will be responsible for developing user-friendly web applications, ensuring a seamless user experience, and collaborating with cross-functional teams to deliver high-quality software solutions. If you are passionate about technology and enjoy working in a fast-paced environment, we want to hear from you!

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.

Corgi is an insurance carrier focused on tech startups, with $108 million in funding and a growing presence across the UK and EU. The platform relies on Django, Stripe for payments, and advanced AI-driven underwriting. As the company expands, the team is seeking experienced developers to help define its next chapter. Role overview This Senior Developer position is based in London. The role suits someone who thrives on building and launching new products from the ground up. Corgi values engineers who move fast and can point to shipped work, whether from professional experience, side projects, or products used by real customers. Evidence of independent product delivery is essential. Requirements Proven history of independently developing and launching real projects Comfort working across the stack (Django, Stripe, and related tools) Ability to deliver results in hours or days, not just over long sprints Open to feedback and new ideas, while able to advocate for technical decisions Motivated by outcomes and results, not job titles Energetic and ambitious, ready to work in a high-growth startup How the team works Decisions are made quickly; waiting for perfect solutions is rare Products and improvements launch frequently, not only on a quarterly basis Preference for a ship-and-iterate approach over lengthy review cycles High intensity during launches, with steady work during quieter periods Transparency is important, most decisions happen in public channels Healthy internal competition encourages everyone to raise the bar This is a build-focused role. Those seeking a place to coast will not be a fit. Behaviors that lead to removal Office politics, shirking responsibilities, or spreading gossip Poor reactions to constructive feedback Adding unnecessary complexity instead of simplifying Missing deadlines after making commitments How to apply Send links to your GitHub, personal website, or live projects you have shipped Resumes are not reviewed Email your application to: sergio@corgi.com If you cannot show evidence of shipped work, this role is likely not a match Location and compensation London-based, with on-site and hybrid options Salary: £75,000 to £140,000, plus equity Compensation is based on demonstrated ability to ship, not job title