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Principal Software Engineer C# .Net AWS - FinTech

London
£100k – £120k/yr
Posted about 14 hours ago
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Principal Software Engineer / Developer (C#.Net AWS Python) London / WFH

Would you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression?

As a Principal Software Engineer, you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross-functional Agile project teams in 2-week Sprints. You'll be an advocate of best practice and ensure software is delivered to schedule.

There's a host of new features and development work, and you'll also help to drive the adoption of AI within the business, introducing things like chatbots and exploring the use of AI to make process improvements.

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.

Start with a chat, not a search bar

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.

P

Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your 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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It searches the market for you

Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.

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.

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Strong

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.

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Strong

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.

This is an impactful role where you'll report into and collaborate with the CTO. You'll have a lot of visibility and quickly see the results of your work.

Location / WFH

There's a hybrid policy, with two days in the brand new London offices and flexibility to work from home two days a week (Thursdays and Fridays).

About you

  • Experienced Software Developer / Engineer with a strong knowledge of modern best practice
  • Strong C# backend development skills, ideally also Python coding skills
  • Good knowledge of AWS
  • Experience of working on highly scalable systems
  • Strong knowledge of Computer Science fundamentals such as OOP, Data Structures, Design Patterns
  • Experience with, or a strong interest in Artificial Intelligence and are keen to explore the possibilities further e.g. ChatGPT, Claude, Cursor, Copilot
  • Strong analysis and problem-solving skills alongside organisation and planning abilities
  • Business acumen and advanced communication / stakeholder management skills

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What's in it for you

As a Principal Software Engineer, you will earn a competitive package including:

  • Salary to £120k
  • Bonus (c20%)
  • Pension (5% employer contribution)
  • 25 days holiday (increasing to 27 after two years and 30 after)
  • Life Assurance (4x base salary)
  • Employee Assistance Programme
  • Range of training, career development and supported learning
  • Impactful role working on cutting edge technology

Apply now to find out more about this Principal Software Engineer / Developer (C# .Net AWS Python) opportunity.

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Skills

C#
Python
AWS
OOP
Data Structures
Design Patterns
Artificial Intelligence
Problem Solving
Analysis
Communication
Stakeholder Management

Location

London, England, United Kingdom

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