C# Software Engineer

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

Job summary

A leading technology firm seeks a mid to senior C# Software Engineer to manage and expand their complex data infrastructure. The ideal candidate will have a strong background in C# and Python, and possess meticulous attention to detail in handling extensive data sets, contributing to the growth of investment strategies on their platform.

Qualifications

• Strong skills in C#, Linux, Dot Net, OOP coding, and Python scripting.
• Experience with enumerable, streaming code design, efficiently managing terabytes of data.
• Attention to detail to quickly identify and solve data issues.

Responsibilities

• Monitor existing data infrastructure, including updates and live feeds.
• Debug and improve data infrastructure as required.
• Respond to data issues reported by users and patch data accordingly.
• Collaborate with vendors to source necessary data.
• Onboard new data sources for enhanced community content.

Skills

C#

Linux

Dot Net

OOP coding

Python scripting

Job description

Social network you want to login/join with:

C# Software Engineer, Crawley, West Sussex

Client: QuantConnect

Location: Crawley, West Sussex, United Kingdom

Job Category: Other

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 who need it.

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 would be:

• 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, patching data.
• Working with third-party vendors to source data for gaps.
• Onboarding new data sources to give our community more content for strategies.

Required Skills

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

Our Ideal Candidate

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