We are seeking a Senior Network Engineer to join an exciting infrastructure transformation project within a leading investment banking environment. After years of organic growth, the trading network is now undergoing a major overhaul with fresh investment focused on latency-sensitive electronic trading systems.This is an opportunity to drive real architectural change, implement automation, and work closely with developers and application teams to redesign the network for performance, scalability, and resilience.📍 Location: Hybrid, London (3 days per week in office)🎯 Your mission:You'll join a tight-knit, agile team with broad responsibilities across the trading and corporate networks. Your focus will be to:Drive network automation using tools like AnsibleRe-architect the network to improve latency and scalabilityAct as the bridge between infrastructure and trading/application teamsEnsure stable operations and lead troubleshooting in production environments🛠️ What you'll bring:Proven experience in low-latency, high-availability trading environmentsStrong hands-on knowledge of Arista network equipment and architectureProficiency in network automation, especially using AnsibleDeep knowledge of routing protocols (OSPF, BGP) and IP transmission (Unicast/Multicast)Experience working with market brokers and direct market connectivityStrong skills in packet-level analysis and root cause troubleshootingAbility to capture business/application needs and translate them into technical solutionsPrevious exposure to firewalls, proxies, load balancers (LTM/Web Gateway)Nice to have:CCIE certification or equivalent experience📌 Key responsibilities:Design, document, and deploy new infrastructure following "network-as-code" principlesOwn high- and low-level design (HLD/LLD) and support knowledge sharing with global ops teamsServe as the senior escalation point for London-based trading network issuesCollaborate with global peers and vendors to manage implementation and upgradesSupport and optimise monitoring, capacity planning, and incident response📌 Recruitment process:Intro call with our Talent Acquisition teamTechnical interviewFinal meeting with the engineering and project leadsApply now:As an employer, MARGO offers equal employment opportunities regardless of gender, ethnicity, religion, sexual orientation, social status, disability, or age. MARGO is committed to fostering an inclusive work environment that reflects the diversity of its teams, and several actions are taken daily to achieve this!Envie d'en savoir plus ?Rencontrez Oussama, Développeur C#Rencontrez Prosper, C++ Senior DeveloperDécouvrez l'entrepriseExplorez la vitrine de l'entreprise ou suivez-la pour savoir si elle vous correspond vraiment !Ils sont sociablesL'entrepriseLogiciels, IT / Digital350 collaborateursCréée en 2005Âge moyen : 30 ansChiffre d'affaires : 40M€Qui sont-ils ?Nous avons choisi de mener auprès de nos clients uniquement des missions à haute complexité IT.En effet, nous sommes persuadés que la complexité des missions est corrélée à leur valeur ajoutée. MARGO est ainsi partenaire de clients ambitieux et visionnaires misant sur le progrès.Du sur-mesure au service de votre ambition et à la hauteur de votre talent.Le lieu de travailLes +Psst... On a plein de choses à vous dire sur les avantages que nous offrons à nos employés.SauvegarderA proposNous rencontrerLa newsletter qui fait le tafUne fois par semaine, des histoires, des jobs et des conseils dans votre boite mail.Je m'abonneVous pouvez vous désabonner à tout moment. On n'est pas susceptibles, promis. Pour en savoir plus sur notre politique de protection des données,