# Core C++ Developer (London)

> G-20 Group · London, United Kingdom · Full-time · Posted 2026-02-25

**Workplace:** on_site

## Description

**About G-20 Group** 

G-20 Group is a leading cross-asset trading firm active in delta-one and derivatives markets. Established in 2010, G-20 offers liquidity solutions, treasury management, and institutional advisory services. We are supported by an outstanding team of professionals, with a robust global presence in EMEA, Americas, and APAC. 

**Role Overview**

We are seeking a highly skilled and motivated Core C++ Developer to join our London team to further develop and maintain the proprietary, in-house trading engine.

We are seeking a candidate with a strong background in building large-scale low-latency systems. The role involves maintaining daily trading operations as well as developing scalable, high-performance code, optimizing system architecture and modularity to ensure seamless operations and functionality.

The ideal candidate will be self-driven, motivated, responsible and highly responsive, working independently to develop and improve the existing code base, while collaborating closely with diverse cross-functional teams of stakeholders and fellow developers. We are looking for someone with strong expertise in C++ programming, debugging, and system optimization, who is passionate about delivering practical, high-quality, PnL-focused solutions.

The primary focus for this role will be working on core engine components, including trading engines, pricing, market making strategies and underlying trading infrastructure.

**Key Responsibilities**

-   Trading Engine Development: Develop the existing and new components within the trading engine while maintaining overall system design.
-   Ownership of Engine Components: Grow into ownership of existing or newly developed trading engine components, such as pricing, market-making, hedging, etc.
-   Performance Optimization: Continuously monitor and optimize trading engine performance.
-   Systems Refactorization: Work on appropriate code modularization, versioning, deployment and test processes.
-   Trading Infrastructure Development: Develop, improve and maintain overall trading infrastruc-ture, including reference and market data, trades and balance dissemination services.
-   Trading Engine Operations: Ensure that day-to-day trading operations run smoothly.
-   Collaboration with Trading: Work directly with the trading team to understand their needs and deliver appropriate solutions that support the firm's strategic goals.

## Requirements

**Education**: Bachelor’s or Master’s degree in computer sciences, Computer Science, Engineering, or a related field.

**Experience**: At least 3+ years or more of experience in software development, ideally in a high-paced trading environment.

**Personal Qualities**:

-   Self-driven, motivated, responsible and highly responsive individual.
-   Mature enough to work collaboratively on the existing code base.
-   Ability to work effectively in a fast-paced trading environment.
-   Strong and tactful communication skills, both verbal and written.

**Tech Skills**:

-   Proficiency in C++ (Cxx-17).
-   Familiarity with Rust is a significant bonus, Python desired.
-   Proficiency in Unix based systems.
-   Experience of cloud-based platforms (AWS).
-   Experience with real-time data messaging (websockets, Redis).
-   Experience with CI/CD tools, Jenkins, Supervisor and docker.
-   Fast problem-solving skills, combined with attention to details.

**Preferred / Desirable Experience**:

-   Familiarity with low latency and high throughput systems.
-   Experience in the finance or cryptocurrency sectors.
-   Experience with high-paced production or trading environments.

**Location and Right to work**: This role will be based in our London office. Only candidates who reside in the UK and possess the pre-existing right to work in the UK without needing company sponsorship need apply.  

Join G-20 and be a part of a team that is at the forefront of financial markets, driving innovation and excellence in the sector.

## Apply

[Apply at G-20 Group](https://apply.workable.com/g-20-advisors-ag/j/B452B7C2E1/apply)

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