1 to 25 of 33 Part-Time FIX Protocol Jobs in the City of London

queries Experience with Fidessa Equities platform ETP/CTAC is desirable Unix/Linux command-line skills and scripting experience are beneficial Knowledge of FIX protocol is an advantage Experience supporting Equity trading systems in a 3rd line capacity is preferred Additional Skills: Excellent communication skills: this is More ❯

MiFID II, EMIR, and FCA requirements. Technical & Analytical Skills: Proficiency with Python, SQL, and scripting languages (e.g., PowerShell, C#). Hands-on experience with FIX Protocol, messaging systems (e.g. multicast, TCP), and network debugging. Experience across Windows and Linux environments. Proven ability to work with instrument static data More ❯

distributed systems. Strong communication skills and ability to collaborate with business stakeholders. Interest or experience in financial products (FX, Derivatives, Options) and familiarity with FIX Protocol, FpML, or similar financial models is a plus. More ❯

fast-paced trading environment. Utilise distributed computing and high-performance computing techniques to enhance algorithmic execution. Integrate with exchange APIs (REST/WebSocket/FIX) for real-time data processing and trading execution. Required Qualifications: Strong understanding of quant trading logic, market structure, and execution strategies. Proficiency in C++ More ❯

scalable, high availability, supportable distributed architectures. Working knowledge of messaging and communication protocols including TCP, UDP, multicast, and data encoding . Working knowledge of FIX and SBE protocol. Working understanding of SQL and simple DDL operations. Excellent oral and written communication skills, ability to interact with business representatives. Desirable More ❯

focusing on low-level performance tuning, multithreading , and garbage collection optimization . FIC or similar business knowledge: Strong understanding of FIC markets Experience with FIX protocol , SBE Market Data Feeds (e.g., Refinitiv, Bloomberg), and LP connectivity . Real time Messaging Systems: Experience with low-latency messaging technologies such … as Solace . Linux based systems, CI/CD pipelines, GitHub Actions, MyBatis, Maven Advanced experience with FIX Engines/Routers (Raptor, Catalyst, Chronicle, or similar tools). Distributed Systems: Experience with distributed computing , clustering , and scalability strategies . Soft Skills: Excellent communication and interpersonal skills to work effectively More ❯

in Computer Science, Engineering or equivalent experience. Scripting and database query skills. Nice to Have: Proficiency in Python. Understanding of exchange connectivity protocols (e.g. FIX). Familiarity with market microstructure, Smart Order Routing, and OMS. More ❯

such as Mathematics, Physics, Computer Science, or Financial Engineering. Experience with low-latency trading systems and real-time data processing. Familiarity with trading APIs, FIX protocol, and order management systems. More ❯

subject. Strong knowledge of Linux/Unix environments Scripting experience - ideally Python Scripting experience. relational database experience (including SQL). Familiarity with trading systems , FIX Protocol , and the technical landscape of trading software. Excellent communication skills, with the ability to explain technical concepts to non-technical stakeholders. Why More ❯

Strong understanding of tick data , time-series databases , and real-time market data . Experience working with global market data feeds (e.g., Bloomberg, Reuters, FIX, Kafka). Proficiency in performance tuning, memory management, and multi-threaded programming in KDB+ . Comfortable working in Agile/DevOps environments, including CI More ❯

Take ownership of your workload and contribute to team task distribution. Develop expertise in proprietary trading platforms, supporting issue replication and UAT testing. Troubleshoot FIX API connections and monitor trade flows and market data workflows. Support daily health checks and participate in platform testing and process improvement initiatives. Contribute … services environment (e.g. brokerage, exchange, investment bank). Familiarity with FX and Rates products (e.g. NDFs, Swaps, FXO, IRS, Gilts, EGBs). Experience with FIX protocol, Unix/Linux, and end-to-end trade lifecycle. Strong communication skills – able to bridge the gap between business and technology. Comfortable More ❯

to troubleshoot live issues and optimise trading operations. Build, maintain, and document proactive alerting systems and health checks for internal and external connectivity (e.g., FIX, REST APIs). Drive operational excellence through robust incident management, process improvement, and knowledge-sharing across regions. Play a key role in onboarding new … and Linux-heavy environment. Strong knowledge of the trade lifecycle in one or more asset classes (e.g., FX, Commodities, Equities). Proven expertise in FIX protocol, trading workflows, and exchange connectivity. Skilled in scripting for automation (Python, Bash) and familiar with tools like Ansible and Geneos. Experience with More ❯

with Microsoft Azure (App Services, SQL Azure, Service Bus, etc.) Azure DevOps for CI/CD Real-time messaging (SignalR, WebSockets) Experience with the FIX protocol System design and architecture expertise Package: £100-120k basic salary 25 days holiday, 7% pension, private health insurance £80/month More ❯

with Microsoft Azure (App Services, SQL Azure, Service Bus, etc.) Azure DevOps for CI/CD Real-time messaging (SignalR, WebSockets) Experience with the FIX protocol System design and architecture expertise Package: £100-120k basic salary 25 days holiday, 7% pension, private health insurance £80/month More ❯

a related technical field. Preferred Experience: Expertise with Pytest and Python-based automation tooling. Prior exposure to equities trading environments. Familiarity with KDB and FIX protocol testing. Experience testing front-end interfaces and GUIs. This is a rare opportunity to work in a high-performance environment where technology More ❯

applications, software engineering, microservices and cloud. This could include Core Java, Spring Boot, Hibernate/JPA and UI using React, Ember, JavaScript or HTML. FIX Experience Cloud experience with containerization (Docker, Kubernetes), Database (Relational and NoSQL), Messaging (RabbitMQ), Repository (BitBucket), or Helm Charts would be highly regarded (not all More ❯

Cloud deployment (Azure, AWS, or GCP) Open to working with Python and React Desirable: Finance/trading experience React (Redux), Python, Docker, Azure DevOps, FIX protocol Websockets/SignalR, SQL optimisation Benefits: 25 days holiday, 7% pension, private health insurance £80/month gym benefit, life assurance Season More ❯

financial instruments and markets (equities, futures, options, forex) and understanding of historical data usage in algorithmic trading Familiarity with market data formats (MDP, ITCH, FIX, SWIFT, proprietary exchange APIs) and market data providers Strong programming skills in Python (Go/Rust is a nice to have) Experience with ETL More ❯

customers. Requirements needed: The ideal candidate will have excellent interpersonal and communication skills, and will additionally possess technical or business experience with: Electronic trading FIX protocol Forex markets CentOS/REHL Scripting/coding experience Extreme comfort with log investigation and configuration file management Issue ticketing systems APIs More ❯

automation testing. Expertise in server and database layer testing, and familiarity with tools such as Pytest, is highly desirable. Experience with trading systems or FIX Protocol would be considered a significant advantage. The successful candidate will have excellent communication skills, a proactive mindset, and a proven track record More ❯

environment Strong Linux skills and comfort working in command-line environments Understanding of market data and/or order data systems, including protocols like FIX or exchange-native formats Strong analytical and problem-solving mindset Ability to navigate or debug object-oriented code (Java and Python preferred) Familiarity with More ❯

applications, software engineering, microservices and cloud. This could include Core Java, Spring Boot, Hibernate/JPA and UI using React, Ember, JavaScript or HTML. FIX Experience Cloud experience with containerization (Docker, Kubernetes), Database (Relational and NoSQL), Messaging (RabbitMQ), Repository (BitBucket), or Helm Charts would be highly regarded (not all More ❯

level C++ on Linux in trading, HFT, or real-time systems Proven track record of shipping mission-critical, latency-sensitive software Deep experience with FIX, binary protocols, and market data ingestion Obsession with performance, minimalism, and elegant code More ❯

shape the long-term strategy of the connectivity stack Key Requirements: Strong Core Java, multithreading, and concurrency experience Knowledge of market connectivity protocols (e.g. FIX) Experience in any asset class, equities preferred, but others considered Ability to work independently and contribute to technical direction This is an opportunity to More ❯

closely with quant and trading teams to optimise execution performance Build and maintain messaging infrastructure using technologies such as Aeron, SBE, Disruptor, Chronicle, and FIX Tune the JVM for microsecond-level performance (0GC, CPU affinity, memory management) Contribute to architecture and design decisions for latency-sensitive services Ensure code More ❯