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

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

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 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 and engineering teams 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 within the wider engineering organisation


• Work directly with Product, Business and Technology stakeholders to understand requirements and shape the right technical approach


• Own technical roadmaps and contribute to longer-term technology strategy


• Remain close enough to the engineering detail to challenge designs, make informed decisions and guide implementation


• Support the evolution of business-critical trading platforms and real-time systems

You'll ideally have:

• 10+ years' software engineering experience, with deep C#/.NET expertise


• A genuine background as a Software Developer / Software Engineer before moving into architecture or technical leadership


• Experience as a Software Architect, Lead Engineer, Principal Engineer or similar


• Proven experience architecting platforms that multiple development teams build upon


• Experience leading engineers, mentoring technical teams and setting engineering standards


• Strong understanding of software architecture, design 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 directly with senior business and technology stakeholders


• Ideally, experience within financial services, capital markets, investment banking or trading technology


• Financial Markets Experience - experience in trading technology would be highly advantageous, particularly exposure to Trading platforms / Electronic trading / Derivatives


• Real-time market data and Trade lifecycle and post-trade technology


• FIX Protocol and CCP / vendor connectivity

**Knowledge of MiFID II, EMIR, DORA or CFTC would also be beneficial.