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Alfonso Subiotto Marqués is a Partner at Index Ventures and a Staff Software Engineer at Polar Signals, based in London, United Kingdom. Promoted to Partner in January 2024, he focuses primarily on Seed and Series A investments across B2B enterprise software, data infrastructure, and artificial intelligence. He leverages his technical background to serve as a board member for notable European technology startups like Fonoa, Sylvera, and Castor, while directing the firm's investment in Kestra in 2022. Alongside his primary venture capital activities, he serves as a Venture Partner at Lorimer Ventures and previously worked as a Senior Software Engineer Technical Lead at Cockroach Labs. After earning an Sc.B. in Computer Science from Brown University and interning at EF Education First, he built a dual career combining hands-on distributed systems engineering with strategic early-stage venture investing.
Alfonso Subiotto Marqués stands out as a prominent Senior Engineer and Tech Lead at Cockroach Labs, a company at the forefront of distributed SQL database technology. His role is critical in shaping the architecture and performance of CockroachDB, a highly scalable, resilient, and consistent database designed for modern cloud-native applications. Alfonso's expertise lies in navigating the complexities of distributed systems, ensuring robust data management and high availability for enterprises worldwide.
Leveraging his deep technical acumen and understanding of the evolving tech landscape, Alfonso Subiotto Marqués is also an active and strategic investor. His investment thesis is heavily influenced by his professional experience, focusing on areas where he possesses significant domain knowledge. Key investment focus areas for Alfonso include B2B SaaS solutions that drive efficiency and innovation, cutting-edge developer tools that empower engineers, and foundational software infrastructure that underpins the next generation of technology. He also shows a keen interest in artificial intelligence and machine learning applications, particularly those that solve complex business problems or enhance data processing capabilities.
Alfonso's career background reflects a strong trajectory in software engineering and leadership within high-growth tech environments. Prior to his impactful work at Cockroach Labs, he honed his skills in developing and optimizing complex software systems, gaining invaluable experience in scalable architectures and performance engineering. This hands-on experience provides him with a unique perspective, allowing him to identify promising startups and technologies with genuine potential for disruption and long-term growth. His technical leadership at Cockroach Labs involves guiding teams, making critical architectural decisions, and contributing to the strategic direction of core product development.
While specific details of his notable investments are often kept private, Alfonso Subiotto Marqués is recognized for his discerning eye for innovation. He seeks out companies that are not only technologically sound but also possess strong leadership and a clear market vision. His involvement as an investor often extends beyond capital, offering valuable technical insights and mentorship to founders in his portfolio. Alfonso's commitment to advancing technology, both through his engineering contributions at Cockroach Labs and his strategic investments, positions him as a significant figure in the tech and venture ecosystem. He is particularly interested in solutions that address the challenges of scale, data integrity, and developer productivity in an increasingly distributed world.
Alfonso Subiotto Marqués is a Senior Engineer/Tech Lead at Cockroach Labs and an active investor. He is known for his expertise in distributed systems and his strategic investments in B2B tech and software infrastructure.
Alfonso Subiotto Marqués primarily invests in B2B SaaS, developer tools, foundational software infrastructure, and AI/ML applications. His investment focus is shaped by his deep technical background in scalable systems.
Alfonso Subiotto Marqués works as a Senior Engineer/Tech Lead at Cockroach Labs, a leading company specializing in distributed SQL databases.