Senior FIX Engineer

CMC Markets is hiring We are looking for a Senior FIX Engineer to develop and enhance the technology underpinning our rapidly growing Institutional business.

As part of the Institutional Core Services team, you will work alongside experienced engineers building and maintaining mission critical FIX APIs, which provide connectivity to CMCs global multi-asset trading platform.

Please note that this role is onsite and would require 5 days per week in our London office near Liverpool Street.

What you'll be working on:

• You'll be designing, implementing, maintaining, and supporting ultra-low latency FIX APIs
• Handling distribution of real-time market data to customers
• Handling order instructions across a variety of asset classes including CFD, FX, cash equity, and a wide variety of order types including algorithmic and advanced order strategies
• Utilising Java with specialised low latency programming and optimisation techniques
• Providing on-call technical support outside UK office hours

Essential Skills & Experience:

• Excellent knowledge of the FIX messaging protocol (version 4.4 and later)
• Excellent knowledge of Java (21)
• Understanding of low latency programming principles, including garbage reduction, lock and wait free algorithms, cache friendly algorithms, non-blocking I/O, unshared state, processor affinity, busy waiting
• Experience with Artio FIX engine
• Experience with Aeron Transport, Aeron Cluster
• Experience with Simple Binary Encoding (SBE)
• Proven track record building robust mission critical systems with a high degree of fault tolerance
• Passion for problem solving and innovation
• Strong communication skills
• Experience with automated unit and integration testing
• Experience with CI/CD

Desirable Skills & Experience:

• Microservice design and implementation
• Java and Linux performance testing and optimisation
• Good understanding of transport protocols TCP/IP, UDP
• Exposure to electronic trading systems and trading workflows

CMC Markets is an equal opportunities employer and positively encourages applications from suitably qualified and eligible candidates regardless of gender, sexual orientation, marital or civil partner status, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age