Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 26 hours ago

C# / .NET Developer – Front Office Liquidity, Treasury & Risk Systems

MARGO60 open roles

Where
London
Work mode
Hybrid
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowC# / .NET Developer – Front Office Liquidity, Treasury & Risk SystemsMARGO · London

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on MARGO's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

13.4% of postings close within 7 days. Measured by our own scanner across the market. MARGO postings stay open a median of 24 days.

Share of postings closed within
  1. 2.2%1 day
  2. 4.6%3 days
  3. 13.4%7 days
  4. 21.6%14 days
  5. 36.2%30 days
  6. 59.0%60 days
This job: posted 26 hours ago

MARGO median: 24 days open

The posting

C# / .NET Developer – Front Office Liquidity, Treasury & Risk Systems

Join MARGO in the UK (London) – Perm & Contracting Opportunities

MARGO is a tech-native consultancy delivering high value-added IT expertise to the financial services industry. We specialise in complex software engineering environments where performance, robustness, and scalability are critical: real-time systems, distributed architectures, high-throughput engines, and complex financial calculations. Joining MARGO means working in demanding Front Office, Global Markets, and Treasury IT environments while benefiting from a human-sized structure, dedicated technical support, and tailored career development paths.

Business Context

You will join the Front Office / Treasury IT environment of a premier Tier-1 investment bank in London.

Working within the Non-Linear IT team across distributed locations, you will engineer mission-critical systems supporting Liquidity Risk, Treasury ALM, XVA, and Financial Resource Management. The platform operates in direct proximity to trading desks, Treasury, and risk managers to calculate balance-sheet funding costs and risk exposures in real time.

The team is actively executing an advanced migration toward a modern, event-driven back-end microservices architecture while supporting interactive UI tools used daily by several hundred users.

Role Overview

We are looking for a passionate Senior C# / .NET Developer to build, modernize, and scale our core front-office calculation engines.

This is a 100% hands-on Individual Contributor seat. You will write clean, high-performance back-end code and translate complex financial logic directly into production systems without business analyst or translation layers.

Key Responsibilities

Design & Engineering

  • Design, build, and optimize high-performance back-end calculation engines using modern C# .NET.
  • Develop asynchronous, message-driven microservices (using Rebus / messaging queues) and Windows Services for distributed processing.
  • Build and tune database objects, complex queries, and data access layers using MS SQL Server and Dapper.
  • Implement real-time communication feeds and RESTful APIs using ASP.NET Web API and SignalR.
  • Leverage LLMs and practical agentic AI workflows (Copilot, Claude) within daily engineering to accelerate testing, refactoring, and delivery.

Functional Implementation

Implement core calculation logic across at least two of the following business areas:

  • Liquidity Risk & Treasury: Cash-flow time-bucketing, NSFR, RNFB, LCR, or liquidity buffers.
  • Cash Forecasting: Forward cash projections and contractual vs. behavioral maturities.
  • Balance Sheet & Capital Metrics: Leverage exposure and financial resource utilization.
  • XVA & Pricing Adjustments: CVA, FVA, ColVA, and funding costs.
  • Risks & Greeks: Non-linear sensitivities (Delta, Gamma, Vega) and PnL Explain.
  • Financial Products: Listed or OTC derivatives.
  • Pre-Trade Analytics: Trade simulation, margin/funding impact checks, and booking workflows.

Delivery & Engineering Standards

  • Deliver clean, testable, and maintainable code adhering to SOLID principles and design patterns.
  • Participate in automated CI/CD pipelines using Git (Bitbucket), TeamCity, Jenkins, or Ansible.
  • Maintain high standards of ownership, transparency, and operational risk mitigation.

Technical Environment

Core Technologies

  • Languages & Frameworks: C# .NET, Windows Services, ASP.NET Web API, SignalR
  • Architecture & Messaging: Event-driven architecture, asynchronous message-driven systems (Rebus), Service-Oriented Architecture (SOA)
  • Data & Storage: MS SQL Server (performance tuning, schema design), Dapper
  • DevOps & CI/CD: Git, TeamCity, Jenkins, Ansible
  • Modern Tooling: Practical experience applying LLMs / agentic AI tools in software engineering

Valued / Nice-to-Have

  • Front-end web development with React, Redux, TypeScript, and HTML

Required Experience & Skills

Essential

  • Proven experience as a Senior C# .NET Developer in demanding, performance-sensitive banking environments.
  • Deep understanding of Object-Oriented design patterns, asynchronous programming, and multithreading.
  • Solid back-end experience building event-driven services, messaging systems, and Windows Services.
  • Strong MS SQL Server database expertise and experience with lightweight ORMs (Dapper).
  • Practical familiarity with enterprise DevOps pipelines and AI developer tools (Copilot/Claude).
  • A dedicated individual contributor mindset committed to daily hands-on coding.

Why Join MARGO

· Access to multi-asset Front Office, Trading and Electronic Trading environments

· Highly technical and challenging engineering assignments

· Clear positioning between HFT and non-HFT trading systems

· Strong emphasis on skill development and long-term career progression

· Human-sized consultancy with close support and high-quality missions

Please note - We do not offer visa sponsorship for this position.

Interested? Motivated? Apply on our website or at [email protected]

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against MARGO's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on MARGO's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    MARGO's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.