Senior Software Architect - C#/.NET | Trading Platforms (Hybrid)

SGI; Greater London; Hybrid; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Bonus

Benefits

Job summary

SGI in London is seeking a Senior C#/.NET Engineer who has evolved into a Software Architect / Lead Engineer to drive platform modernization for global commodities trading. You'll shape platforms, define standards, and provide technical leadership across multiple teams, focusing on performance, security and scalable integration in cloud environments.

Close collaboration with Product and Business stakeholders will help translate complex requirements into robust architectures and reusable

Qualifications

• 10+ years' software engineering experience with deep C#/.NET expertise.
• Background as Software Developer before moving into architecture/leadership.
• Experience as Software Architect, Lead Engineer or similar.
• Proven experience architecting platforms used by multiple development teams.
• Experience mentoring engineers and setting engineering standards.
• Strong understanding of software architecture, patterns and distributed systems.
• Strong SQL experience.
• Experience with Azure/cloud-based platforms.
• Experience designing microservices, APIs and event-driven architectures.
• Experience with messaging technologies such as Kafka and/or IBM MQ.
• Strong understanding of scalability, resilience, performance and security.
• Experience working with senior business/tech stakeholders.
• Ideally, experience in financial services, capital markets or trading technology.
• Financial Markets experience – trading platforms/exposure is highly advantageous.
• Real-time market data and trade lifecycle technologies.
• FIX Protocol and CCP/vendor connectivity.
• Knowledge of MiFID II, EMIR, DORA or CFTC beneficial.

Responsibilities

• Architect and evolve large-scale software platforms used by multiple engineering teams.
• Define the frameworks, patterns and technical foundations developers build upon.
• Make key architectural decisions across complex, business-critical systems.
• Set engineering standards around software design, scalability, resilience, security and performance.
• Work closely with senior developers to turn architecture into working software.
• Design APIs, event-driven architectures, messaging and integration patterns.
• Shape platform modernisation across cloud and distributed environments.
• Provide technical leadership across multiple development teams.
• Mentor senior engineers and help develop technical capability.
• Collaborate with Product, Business and Technology stakeholders to shape the right technical approach.
• Own technical roadmaps and contribute to longer-term technology strategy.
• Remain close to engineering detail to challenge designs and guide implementation.
• Support evolution of trading platforms and real-time systems.

Skills

C#/.NET

Software architecture

Leadership

Azure cloud

Microservices

Event-driven

SQL

Trading tech

Financial services

Stakeholder alignment

Tools

Kafka

IBM MQ

Azure

Job description

SGI in London is seeking a Senior C#/.NET Engineer who has evolved into a Software Architect / Lead Engineer to drive platform modernization for global commodities trading. You'll shape platforms, define standards, and provide technical leadership across multiple teams, focusing on performance, security and scalable integration in cloud environments.

Close collaboration with Product and Business stakeholders will help translate complex requirements into robust architectures and reusable