C# Software Engineer

JR United Kingdom; Portsmouth; On-site; GBP 40,000 - 60,000; Full time

Job summary

A leading company is seeking a mid to senior C# Software Engineer to enhance their data processing stack in Portsmouth. The ideal candidate should possess strong skills in C# and Linux with a meticulous approach to identifying data issues. Join a dynamic team focused on providing innovative solutions in the trading landscape.

Qualifications

• Required experience with C#, Linux, and data engineering.
• Strong coding skills in Dot Net and Python scripting.
• Experience in handling large volumes of data.

Responsibilities

• Manage and maintain the data stack.
• Debug and improve data infrastructure.
• Monitor existing data infrastructure and respond to data issues.

Skills

C#

Linux

Dot Net

Python

OOP coding

Data processing

Job description

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C# Software Engineer, Portsmouth, Hampshire

Client: QuantConnect

Location: Portsmouth, Hampshire, United Kingdom

Job Category: Other

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EU work permit required:

Yes

Job Views: 4

Posted: 26.06.2025

Expiry Date: 10.08.2025

Job Description:

We serve investors, traders, and quants with a platform to design investment strategies. They code up trading strategies and test them on historical data. When they're ready, they can live trade on their brokerage.

Under the hood, we curate and update hundreds of terabytes of data - covering financial data (e.g., stock prices, options prices), fundamental data (e.g., PE Ratios, company debt), and alternative sources (e.g., news articles, sentiment). We have a powerful data processing stack that handles ingestion and distribution of all this data to our different consumers.

Note: We have a slight preference for UK/Europe applicants so you're awake at 4am ET long before the markets open.

Responsibilities

We're seeking a full-time, mid to senior C# engineer to manage, maintain, and expand our data stack. Your responsibilities include:

• Monitoring existing data infrastructure (historical processing, daily data updates, and live feeds).
• Debugging and improving data infrastructure when required.
• Responding to user reports of data issues and patching data.
• Working with third-party vendors to source data for gaps.
• Onboarding new data sources to provide more content for strategies.

Required Skills

• Strong at C#, Linux, Dot Net, OOP coding, and Python scripting.
• Strong at enumerable, streaming code design, working efficiently with terabytes of data.
• Comfortable with the high-stakes, on-call nature of data engineering.
• Meticulous attention to detail to quickly identify data issues.

Our Ideal Candidate

• Clones our repository (LEAN), builds it successfully, runs the unit tests, and attaches the test results to the application. One-click applications, AI applications, and those without this test data will be ignored.