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As a CTO with extensive experience scaling tech teams and products, I’ve driven growth from zero to 9 figures ARR. I’ve built exceptional engineering teams from the ground up, co-developed product strategies, and prioritized developer experience to foster innovation and productivity. My expertise spans high-scalability systems, distributed architectures, and advanced data processing, with a strong focus on security and collaboration with data science and machine learning teams. With a keen business acumen, I bridge the gap between technical execution and strategic goals, delivering end-to-end B2C products, web and mobile apps used by millions, and internal platforms that drive both technical and commercial success. I helped establish ZOE as one of the UK’s most known scale-ups and a leader in #techforgood through our impactful work on the Covid Symptom Study and cutting-edge nutrition research.I’m also a mentor, advisor, and speaker, passionate about sharing knowledge and helping others grow.
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Chief Technology OfficerZoe Sep 2023 - PresentLondon, Select One..., GbZOE is a science and nutrition scale-up that helps you make smarter food choices. ZOE can change the way you eat, feel and live.𝗗𝗿𝗼𝘃𝗲 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗴𝗿𝗼𝘄𝘁𝗵 𝗳𝗿𝗼𝗺 𝟯𝟬 𝘁𝗼 𝟰𝟱𝟬+ 𝗲𝗺𝗽𝗹𝗼𝘆𝗲𝗲𝘀 𝗮𝗻𝗱 $𝟬 𝘁𝗼 𝟵 𝗳𝗶𝗴𝘂𝗿𝗲𝘀 𝗔𝗥𝗥.• Executive team member, reporting to the CEO.• Scaled the tech team from 8 to ~100 across 10+ countries, spanning engineering, machine learning, data science, analytics, IT and security.• Led the UK and US product launches, including: mobile apps, physical products, and D2C/in-store launches of wholefood supplements (Daily30).• Led the development of the Covid Symptom Study / ZOE Health Study, delivering an MVP in 5 days and reaching 1 million users in 36 hours during the first two weeks of lock down. Supported the publication of over 40 scientific papers in journals such as The Lancet, Nature Medicine, The Oncologist and Nature Food.• Pioneered our values and remote work practices, optimizing async communication, deep focus, and regular face-to-face interaction.• Led the adoption of LLMs in production (photo logging, recipe recommendations, conversational AI, ...) and for improved productivity.𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆 𝘀𝘁𝗮𝗰𝗸: Python, Kotlin, TypeScript, React, React Native, iOS, Android, GCP, Microservices, Kubernetes, ArgoCD, BigQuery, DBT, Hex, Pub Sub, Copilot, OpenAI, LLMs, Vespa, LiteLLM, Kameleeon, Mixpanel, ...
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Vp Of EngineeringZoe Oct 2019 - Sep 2023London, Select One..., Gb
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Engineering ManagerG-Research Nov 2015 - Oct 2019London, GbG-Research is a leading quantitative research and technology company using advanced machine learning and big data to develop investment strategies.𝗟𝗲𝗱 𝗱𝗮𝘁𝗮 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺 𝘁𝗲𝗮𝗺𝘀 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗶𝗻𝗴 𝗽𝗲𝘁𝗮𝗯𝘆𝘁𝗲-𝘀𝗰𝗮𝗹𝗲 𝗱𝗮𝘁𝗮𝘀𝗲𝘁𝘀 𝘁𝗼 𝗿𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗮𝗻𝗱 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻.• Built low-latency systems delivering and aggregating billions of events daily across 10+ datacenters and thousands of cores.• Developed a Spark-based quant research platform that delivered a 20x performance improvement, directly contributing to 10s of millions in PnL within a 12-month period.• Prioritised competing demand from 15+ teams in trading, data science, engineering, security, SRE, and ops.• Designed and managed systems to ensure data quality and versioning for machine learning workflows.𝗟𝗲𝗱 𝘁𝗵𝗲 𝗮𝗱𝗼𝗽𝘁𝗶𝗼𝗻 𝗼𝗳 𝗺𝗼𝗱𝗲𝗿𝗻 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲𝘀 𝗮𝗻𝗱 𝗰𝘂𝘁𝘁𝗶𝗻𝗴 𝗲𝗱𝗴𝗲 𝘁𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝘆• Introduced continuous delivery, shipping >100 times a week to production.• Transitioned monoliths to microservices, improving DORA metrics and system reliability.• Led the introduction of Kubernetes, Kafka or Aerospike across the 250+ person division.• Scaled modern development practices (pair programming, retrospectives, health checks) across the division.• Fostered leadership growth through regular re-teaming, achieving the division's highest IC-to-manager promotion rate.𝗧𝗲𝗰𝗵 𝘀𝘁𝗮𝗰𝗸: C#, Kotlin, Spring Boot, Spark, Kubernetes, Kafka, Aerospike, Istio, GRPC, Angular, REST, ... -
Staff Dev LeadCriteo Mar 2014 - Nov 2015Paris, FrCriteo provides advertising solutions, using machine learning to help businesses target and engage customers across digital platforms.𝗘𝗻𝗮𝗯𝗹𝗲𝗱 𝗮𝗱𝘃𝗲𝗿𝘁𝗶𝘀𝗲𝗿𝘀 𝘁𝗼 𝗲𝘅𝗽𝗹𝗼𝗿𝗲 𝗽𝗲𝘁𝗮𝗯𝘆𝘁𝗲-𝘀𝗰𝗮𝗹𝗲 𝗱𝗮𝘁𝗮𝘀𝗲𝘁𝘀 𝘄𝗶𝘁𝗵 𝘀𝘂𝗯-𝘀𝗲𝗰𝗼𝗻𝗱 𝗹𝗮𝘁𝗲𝗻𝗰𝗶𝗲𝘀• Led the rewrite of Criteo’s new analytics and campaign management platform.• Led a full-stack engineering team across Paris and Bucharest.• Introduced Druid, a real-time data store, to achieve 100x performance boost. Led the end-to-end productionization process.• Served on Criteo’s architecture panel (~10 top engineers), contributing to strategic technical decisions across the tech org (200 people)• Delivered public and internal technical talks, sharing insights and expertise.• Bar raiser & mentor for technical interviews (design & behavioural).Tech stack: .Net, C#, Microservices, Typescript, Scala, Angularjs, D3, Druid, Hadoop, ... -
Lead Software EngineerAbc Arbitrage Asset Management Jan 2009 - Feb 2014ABC Arbitrage specializes in quantitative trading, using data-driven models and machine learning to capitalize on market inefficiencies.𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗱 𝗱𝗶𝘀𝘁𝗿𝗶𝗯𝘂𝘁𝗲𝗱, 𝗹𝗼𝘄-𝗹𝗮𝘁𝗲𝗻𝗰𝘆 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 (<𝟭𝗺𝘀) 𝗮𝗻𝗱 𝗲𝗻𝗱 𝘁𝗼 𝗲𝗻𝗱 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝘄𝗵𝗶𝗹𝗲 𝗱𝗿𝗶𝘃𝗶𝗻𝗴 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗮𝗻𝗱 𝗺𝗮𝗻𝗮𝗴𝗲𝗿𝗶𝗮𝗹 𝗶𝗻𝗻𝗼𝘃𝗮𝘁𝗶𝗼𝗻.• Led the engineering of business-critical applications, including order processing, real-time trade processing, news indexation, reference data management, and trading tools.• Pioneered the use of SOA, distributed architecture, and event-driven systems (AMQP, Zmq).• Led the adoption of NoSQL technologies (event sourcing, Redis, Cassandra, ElasticSearch) to enhance scalability and performance.• Built core infrastructure frameworks, including a message bus supporting 100+ services and a presentation framework powering all company UIs.• Established agile and software craftsmanship practices (TDD, CI/CD, daily standups, retrospectives, ...).• Interviewed and mentored new hires, fostering a high-performing and collaborative engineering team.
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Co-Founder & CtoLeetchi Jun 2008 - Nov 2008
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Software EngineerOrbis Investment Advisory Limited Feb 2007 - Feb 2008
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Co-Founder & CtoKaalys May 2002 - Jul 2005
Julien Lavigne Du Cadet Skills
Julien Lavigne Du Cadet Education Details
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SupinfoComputer Sciences -
The London School Of Economics And Political Science (Lse)Principles Of Accounting
Frequently Asked Questions about Julien Lavigne Du Cadet
What company does Julien Lavigne Du Cadet work for?
Julien Lavigne Du Cadet works for Zoe
What is Julien Lavigne Du Cadet's role at the current company?
Julien Lavigne Du Cadet's current role is CTO @ ZOE | Transforming health of millions.
What is Julien Lavigne Du Cadet's email address?
Julien Lavigne Du Cadet's email address is ju****@****det.com
What is Julien Lavigne Du Cadet's direct phone number?
Julien Lavigne Du Cadet's direct phone number is +4420763*****
What schools did Julien Lavigne Du Cadet attend?
Julien Lavigne Du Cadet attended Supinfo, The London School Of Economics And Political Science (Lse).
What are some of Julien Lavigne Du Cadet's interests?
Julien Lavigne Du Cadet has interest in Photography, Rugby And Tag Rugby, Watching Rugby.
What skills is Julien Lavigne Du Cadet known for?
Julien Lavigne Du Cadet has skills like Agile Methodologies, C#, Test Driven Development, Software Development, .net, Oop, Soa, Tdd, Distributed Systems, Messaging, Sql, Cqrs.
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