Senior Ruby Developer at Upbeat Ideas UK Ltd | London

Join our innovative team at Upbeat Ideas UK Ltd as a Senior Ruby Developer. In this role, you will leverage your extensive experience in Ruby on Rails to design and develop scalable web applications that enhance our client's digital presence. You will collaborate with cross-functional teams, ensuring high-quality code through best practices and effective testing methodologies.We are looking for a creative problem-solver who thrives in a fast-paced environment and is passionate about technology and user experience.

Join our dynamic team at Upbeat Ideas UK Ltd as an SAP SD Functional Consultant. In this role, you will leverage your expertise in SAP Sales and Distribution to optimize processes and enhance our clients' operational efficiencies. You will collaborate with cross-functional teams to gather requirements, design solutions, and implement best practices. Your contributions will directly impact our clients' satisfaction and success.

Join our innovative team as a C# Developer, where you will design and implement cutting-edge software solutions that drive our projects forward. You will work closely with cross-functional teams to create robust applications, ensuring high performance and responsiveness. If you are passionate about coding and eager to tackle complex challenges, we want to hear from you!

We are seeking a dynamic and experienced Lead Solution Architect to join our innovative team at Upbeat Ideas UK Ltd. In this role, you will be responsible for leading the design and implementation of complex solutions that drive business success. You will collaborate closely with stakeholders, understand their needs, and translate them into effective architectural solutions.The ideal candidate will have a deep understanding of modern architecture principles, cloud technologies, and a proven track record of delivering high-quality solutions. You should be an excellent communicator, capable of articulating technical concepts to both technical and non-technical audiences.

Join our dynamic team as a Business Analyst - Baggage in London! We are seeking a motivated and skilled professional who is eager to contribute to innovative solutions in the baggage management sector. In this role, you will analyze business processes, gather requirements, and collaborate with stakeholders to improve efficiency and customer satisfaction.

We are seeking a highly skilled and motivated Technical Manager for Broadcasting with expertise in Broadcast Encoding. In this pivotal role, you will oversee the technical aspects of our broadcasting operations, ensuring seamless encoding processes and high-quality output. You will collaborate closely with our production teams to optimize workflows and implement innovative solutions. If you are passionate about technology and broadcasting, we want to hear from you!

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.

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 WintermuteWintermute is a pioneering technology firm and one of the foremost algorithmic trading companies specializing in digital assets. Our mission is to provide liquidity across a diverse range of cryptocurrency exchanges and trading platforms. We also offer comprehensive OTC trading solutions while supporting prominent blockchain initiatives and traditional financial institutions transitioning into the crypto space. Additionally, Wintermute Ventures invests in early-stage DeFi projects, further enhancing our influence in the industry.Founded in 2017, Wintermute has adeptly navigated through various industry cycles. We blend the high-frequency trading standards of traditional markets with the innovative spirit of technology startups. At Wintermute, we are committed to harnessing the disruptive potential of blockchain technology, maintaining a long-term perspective on the digital asset market, and leading the way in establishing a compliant and innovative trading environment. To learn more, please visit our website.Join Our TeamWe are on the lookout for a passionate C++ Quant Developer who thrives on technology and possesses a keen interest in both the intricate details of computer hardware and the overarching design of expansive systems, including data infrastructure. The ideal candidate enjoys exploring the inner workings of technology, has a solid understanding of data structures, and possesses experience in developing client-server network applications and optimizing high-performance code. We value prior experience from personal projects as well as professional backgrounds. A PhD in mathematics is common among our Quant Developers, and a solid grasp of mathematical concepts is essential. An interest in algorithmic and quantitative trading is a bonus.At Wintermute, you will have the unique opportunity to directly influence our trading activities by developing and enhancing various aspects of our trading platform, data infrastructure, and related software. You will receive guidance from seasoned developers and traders, including our founders. Expect immediate responsibility and independence, enabling you to learn at an unparalleled pace! We operate without legacy systems, bureaucratic hurdles, or multiple approval layers; all developers report directly to our hands-on CTO. The impact you make is truly up to you!

Join our dynamic team at Ratio Recruitment Ltd, where innovation meets creativity! We are looking for a talented Front End Web Developer who is passionate about crafting user-friendly and visually appealing web applications. In this role, you will collaborate with designers and back-end developers to deliver seamless digital experiences.

Job Description:We are seeking an accomplished C# and .NET Developer to join our dynamic team. The ideal candidate will possess a deep understanding of C# and the .NET framework, demonstrating proficiency in developing robust applications and solutions.Mode of Interview: Telephonic & Face to Face.

Join our dynamic team as a Senior C# / Orchestrade Developer at Talan, where your expertise will help shape innovative financial solutions. In this role, you will be at the forefront of developing and enhancing our Orchestrade platform, ensuring high performance and scalability.Your responsibilities will include collaborating closely with cross-functional teams, providing technical leadership, and driving the implementation of best practices in software development. Bring your passion for coding and problem-solving to a vibrant workplace that values creativity and collaboration.

Maven Securities is a cutting-edge proprietary trading firm that strategically allocates its internal capital across diverse trading strategies, including discretionary, systematic, and market-making. Our dedicated team comprises skilled traders, engineers, and technologists, all united in our mission to optimize our role as a leading liquidity provider in the global derivatives market. By utilizing innovative execution and pricing technologies, we aim to transform and enhance the operation of financial markets. As a C++ Developer on our trading floor, you will collaborate closely with traders, quantitative researchers, and fellow developers to enhance system connectivity to new markets, refine order execution algorithms, and advance our trading strategies. You will also be involved in the development of automated pricing systems and infrastructure that bolster our options market-making business. Your contributions will directly influence the firm's success and visibility within the industry.

Position Overview Join our dynamic and collaborative team as a Quantitative Developer specializing in C++. In this role, you will be instrumental in developing and maintaining high-performance trading systems and signal logic while supporting critical infrastructure. You will work closely with quantitative researchers and traders, assisting in the implementation of trading strategies and various research projects. Your collaboration with technology teams will involve providing strategy and signals containers, ensuring seamless integration with Squarepoint's comprehensive infrastructure. The ideal candidate will thrive in a fast-paced environment, adeptly balancing rapid tactical delivery with long-term strategic initiatives. Strong communication skills are essential for driving cross-team projects and daily interactions with quant researchers and traders. A solid work ethic, enthusiasm for cutting-edge technology, and the determination to navigate complex challenges are key attributes for success in this role. Attention to detail and experience with defensive programming are vital. Research and implement trading strategies and signals logic, including backtesting, simulations, and processing frameworks. Develop advanced tooling for analyzing large data sets using statistical methods to identify trading opportunities and assess impacts over time. Gain a thorough understanding of market operations and structures to effectively apply domain knowledge to software design and development. Focus on long-term design improvements and maximizing code reuse. Support quantitative researchers with technical aspects of trading strategies and contribute to R&D efforts. Participate in the strategic design and roadmap for high-performance trading infrastructure. Provide production support, primarily in a Level 2 capacity, with Level 1 support during specific strategy rollouts. Collaborate with cross-functional teams (feed handlers, order gateways, reference data) to drive initiatives including latency monitoring and product rollouts.

About WintermuteWintermute is a pioneering technology firm and one of the largest algorithmic trading companies specializing in digital assets. We excel at providing liquidity across a multitude of cryptocurrency exchanges and trading platforms, offering a wide array of OTC trading solutions, while also bolstering high-profile blockchain initiatives and traditional financial institutions venturing into the crypto space. Additionally, Wintermute operates a ventures arm that invests in promising early-stage DeFi projects.Since our inception in 2017, Wintermute has adeptly navigated through various industry cycles. Culturally, we blend the technological excellence of high-frequency trading firms in traditional markets with the innovative spirit of technology startups. At Wintermute, we are committed to harnessing the transformative potential of blockchain technology. Our long-term vision focuses on the digital asset market, and we strive to play a leading role in establishing an innovative and compliant trading environment. You can learn more about us here.Join Our Team at WintermuteWe are on the lookout for a passionate C++ Trading Platform Developer who possesses a keen interest in both the intricate details of computer hardware and the overarching design of large-scale systems, including data infrastructure. Ideal candidates will have a natural curiosity to explore the inner workings of systems, a solid understanding of data structures, and experience in writing client-server network applications. Additionally, proficiency in writing and optimizing high-performance code is essential. We value both your commercial experience and personal projects that showcase your dedication to technology. A genuine interest in algorithmic and quantitative trading will be considered advantageous.At Wintermute, you will have the opportunity to grow your skills and make a direct impact on our trading activities by developing and enhancing various components of our trading platform, data infrastructure, and related software. You will receive mentorship and insights from seasoned developers and traders, including the founders of the company. Expect a high degree of independence and responsibility from the outset, with a learning curve that is second to none. We do not have legacy systems, excessive approvals, or bureaucracy; all developers report directly to the CTO, who is actively involved in day-to-day operations. Your contributions will be evaluated based on their impact rather than the hours you log.

Join our dynamic team at asos as a Senior Software Engineer specializing in Azure and C#. In this pivotal role, you'll be responsible for designing, developing, and deploying innovative software solutions that enhance our e-commerce platform. You'll collaborate with cross-functional teams to ensure the delivery of high-quality software that meets our business objectives and customer needs.

Join our dynamic team at Ratio Recruitment Ltd as a Front End Developer in London! We are seeking a talented individual who is passionate about creating engaging and user-friendly web interfaces. In this role, you will collaborate with designers and back-end developers to deliver high-quality web applications that enhance user experience.

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.

About Smart Working Solutions Smart Working Solutions connects leading companies with skilled, AI-focused tech talent worldwide. The team supports clients and candidates throughout the hiring process, helping build strong, lasting relationships. The company’s mission centers on making talent accessible as a service, so everyone involved benefits from the right match. Why This Role Matters Improves workforce efficiency on a global scale Drives innovation and strengthens competitive advantage Expands access to quality jobs and supports equality Creates positive impacts for families through meaningful work Belief that outstanding teams produce exceptional results How We Work Smart Working Solutions assembles remote engineering teams quickly and reliably. As a growing scale-up, the company combines advanced technology with human insight to solve hiring challenges for clients around the world. Role Overview: Sales Manager (London) The Sales Manager will focus on bringing in new clients, managing the sales process from first contact through to closing, and turning qualified leads into long-term partnerships. This position is central to the company’s growth strategy and revenue goals. What You Will Do Identify and secure new business opportunities Manage the full sales cycle from prospecting to deal closure Build and nurture relationships with senior decision-makers Develop expertise in the remote tech talent sector Location London

Join Canva as a Senior UI Engineer, where you will play a crucial role in designing and developing exceptional user interfaces for our iOS and macOS applications. Collaborate with cross-functional teams to create engaging user experiences that delight our millions of users worldwide.