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

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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?"
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
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Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
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Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
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
- High-performance distributed systems
- FIX Protocol and CCP / vendor connectivity
- Knowledge of MiFID II, EMIR, DORA or CFTC would also be beneficial.


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If you are interested in this Senior Software Engineer / Architect Role, please apply directly to this advert with your updated CV.
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