Senior Software Engineer / Software Architect | C#/.NET | Global Commodities Trading | London

Senior Software Engineer / Software Architect | C#/.NET | Global Commodities Trading | London📍London, Hybrid | 💷 Excellent Salary + Bonus + Benefits | 📅 Permanent Role We're working with a global financial services organisation that is investing heavily in the modernisation of its technology estate, and is looking for a Senior C#/.NET Engineer who has evolved into a Software Architect / Lead Engineer.We're looking for someone who has spent their career building software first, then progressed into designing the platforms, frameworks and architecture that other engineers build upon.You'll bring deep C#/.NET expertise, strong software design principles and experience architecting enterprise platforms within financial services, ideally across capital markets, trading or investment banking. This is a genuinely engineering-led architecture role.You'll also have experience leading engineers and influencing technical direction, working closely with developers, product teams and senior stakeholders to turn complex business requirements into scalable technology.The Role: You won't simply be producing high-level designs and handing them over to engineering.You'll be close to the engineering; shaping how platforms are built, setting technical standards, designing reusable frameworks and integration patterns, and providing technical direction to development teams. You'll be the person other engineers come to when they're asking:"How should we build this?"It's a role for someone who wants to be the technical authority behind the platform, rather than simply another layer of architecture governance.What you'll do: Architect and evolve large-scale software platforms used by multiple engineering teamsDefine the frameworks, patterns and technical foundations developers build uponMake key architectural decisions across complex, business-critical systemsSet engineering standards around software design, scalability, resilience, security and performanceWork closely with senior developers and engineering teams to turn architecture into working softwareDesign APIs, event-driven architectures, messaging and integration patternsShape platform modernisation across cloud and distributed environmentsProvide technical leadership across multiple development teamsMentor senior engineers and help develop technical capability within the wider engineering organisationWork directly with Product, Business and Technology stakeholders to understand requirements and shape the right technical approachOwn technical roadmaps and contribute to longer-term technology strategyRemain close enough to the engineering detail to challenge designs, make informed decisions and guide implementationSupport the evolution of business-critical trading platforms and real-time systemsYou'll ideally have:10+ years' software engineering experience, with deep C#/.NET expertiseA genuine background as a Software Developer / Software Engineer before moving into architecture or technical leadershipExperience as a Software Architect, Lead Engineer, Principal Engineer or similarProven experience architecting platforms that multiple development teams build uponExperience leading engineers, mentoring technical teams and setting engineering standardsStrong understanding of software architecture, design patterns and distributed systemsStrong SQL experienceExperience with Azure / cloud-based platformsExperience designing microservices, APIs and event-driven architecturesExperience with messaging technologies such as Kafka and/or IBM MQStrong understanding of scalability, resilience, performance and securityExperience working directly with senior business and technology stakeholdersIdeally, experience within financial services, capital markets, investment banking or trading technologyFinancial Markets Experience - experience in trading technology would be highly advantageous, particularly exposure to Trading platforms / Electronic trading / DerivativesReal-time market data and Trade lifecycle and post-trade technologyHigh-performance distributed systemsFIX Protocol and CCP / vendor connectivity**Knowledge of MiFID II, EMIR, DORA or CFTC would also be beneficial.If you are interested in this Senior Software Engineer / Architect Role, please apply directly to this advert with your updated CV.