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# Senior Software Engineer (C++)

- **Company:** Selby Jennings
- **Location:** London, UK
- **Experience:** Expert
- **Salary:** £77,832.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Airflow, Apache HTTP Server, Big Data, C++ (Programming Language), Data Architecture, Data Infrastructure, Linux, Digital Assets, Distributed Systems, Python (Programming Language), Performance Tuning, Software Deployment, Software Engineering, Multithreading, Concurrency, Data Lakes, Low Latency, Apache Kafka, Video Streaming, Api Design, C++14
- **Published:** October 3, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5908896274

## About the Role

* Strong commercial experience developing software in modern C++.
 * Experience building Linux-based distributed systems.
 * Strong understanding of concurrency, multithreading and performance optimisation.
 * Experience working within high-throughput, latency-sensitive or real-time environments.
 * Proven track record of delivering production systems in fast-paced engineering teams.
 * Excellent problem-solving abilities and a desire to tackle technically challenging problems.
 * Strong communication skills and an ability to work directly with end users and stakeholders.

Desirable Experience

 * Financial markets, electronic trading, market data, exchange connectivity or quantitative research experience.
 * Experience with Kafka or similar streaming technologies.
 * Experience with Python and/or Java alongside C++.
 * Knowledge of modern data architectures, data lakes and large-scale data platforms.
 * Exposure to derivatives, options, fixed income, commodities, ETFs, digital assets or systematic trading environments.
 * Experience with Airflow, Dagster, Apache Iceberg, Delta Lake or similar technologies.

## Description

As a Software Engineer, you'll take ownership of critical components that underpin trading and research workflows across multiple asset classes. You'll be involved in the full development lifecycle, from architecture and design through to production deployment and optimisation., * Designing and developing high-performance C++ systems for market data and trading applications.

 * Building scalable platforms for processing and distributing large volumes of time-series data.
 * Developing APIs and services that provide low-latency access to real-time and historical datasets.
 * Working closely with trading and quantitative research teams to understand business requirements and deliver robust solutions.
 * Improving system performance, reliability, scalability and observability.
 * Contributing to the evolution of modern data infrastructure, including streaming and distributed systems.
 * Supporting production systems and ensuring operational excellence across critical applications.


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