Senior Network Engineer in London

Chicago Trading Company (CTC) is a premier proprietary trading firm specializing in options market making. Our collaborative culture fuels innovation in quantitative research, systematic trading strategies, and cutting‑edge trading technology. For over three decades CTC has provided critical liquidity across derivatives exchanges worldwide – making them fairer, more transparent, and more efficient. We strive to be the most innovative firm in the industry today, tomorrow, and long into the future while upholding ethical excellence. We believe that CTC makes a positive impact on the markets, the lives of our employees, and all the communities to which we belong.

As a Sr. Network Engineer, you will be a member of the Network Engineering team. You’ll work as part of a tight‑knight team responsible for planning, implementing, and supporting technical solutions across enterprise, cloud, and trading environments. This role requires deep technical, operational, and communication skills to deliver results across the trading platform.

What You’ll Do

• Design, implement, operate, and support CTC’s global network infrastructure
• Collaborate with traders, developers, operations teams, technologists, and management to deliver high‑quality network solutions to real‑world problems
• Take a data‑driven approach to analyzing and solving complex network infrastructure issues
• Guide projects from beginning to end, including design, procurement, implementation, and documentation
• Use automation to improve efficiency and manage the network at scale
• Enhance monitoring and alerting for network and application performance
• Participate in an on‑call rotation with the team for off‑hours support. Other duties as assigned or needed.

What We’re Looking For

• Extensive experience supporting a large‑scale, global network with hands‑on experience in low‑latency architecture
• Deep knowledge of low‑level network debugging, with a track record of solving performance issues
• Deep understanding of TCP/IP & Ethernet networking including unicast and multicast routing protocols
• Strong problem‑solving under pressure and a collaborative, customer‑service mindset; financial trading industry experience preferred

Most teams at CTC, with the exception of Trading, follow a hybrid workplace model, subject to change based on business need.

Benefits

• Generous time off
• Insurance coverage
• Paid parental leave
• Free breakfast and lunch (plus healthy snacks)
• Wellness reimbursement
• Variety of other benefits focused on providing the best employee experience

Our Commitment to Diversity, Equity and Inclusion

At CTC, we aim to cultivate a workplace that celebrates diversity and ensures each person feels included, engaged and empowered. We are committed to having a diverse workforce and are proud to be an equal‑opportunity employer. CTC does not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform crucial job functions, and to receive other benefits and privileges of employment.

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Use of Artificial Intelligence (AI)

Information submitted by job applicants may be subject to review and analysis by automated systems, including Artificial Intelligence (AI), as part of the recruitment process. Such systems are utilized to enhance the efficiency and effectiveness of our hiring procedures. Applicants are advised that any information provided may be evaluated by AI tools to ensure an equitable and thorough assessment.