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Open-Source Evangelist

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  • Role overview
  • Who are we looking for
  • Our benefits
  • The process
  • Why apply
  • Meet our people
  • Technology Innovation and Open Source
  • London

We tackle the most complex problems in quantitative finance by bringing scientific clarity to financial complexity.

From our London HQ, we unite world-class researchers and engineers in an environment that values deep exploration and methodical execution - because the best ideas take time to evolve.  Together we’re building a world-class platform to amplify our teams’ most powerful ideas.

The Open Source Software team exists to support all G-Research groups and help strengthen the global open-source community.

Take the next step in your career.

The role

This role acts as the connective tissue between the internal engineering world of G-Research and the external universe of open-source software.

As an Open-Source Evangelist, you will drive implementation of priority features within key projects, contributing directly to the open-source ecosystem.

You will help to accelerate the adoption of open-source tooling at G-Research in a way that improves our engineers’ user experience and productivity.

Key responsibilities of the role include:

  • Partnering with internal teams to pinpoint and leverage open-source opportunities and solutions
  • Enhancing internal visibility of the team initiatives through our internal communication platforms like podcasts and interactive ‘surgery’ sessions
  • Engaging directly with research and engineering teams to deeply understand and respond to their technological needs
  • Facilitating and streamlining contributions to third-party and in-house open-source projects
  • Initiating and nurturing new open-source projects to address emerging needs and opportunities
  • Actively contributing to and influencing third-party open-source projects while staying abreast of new technologies in the open-source community

Who are we looking for?

The ideal candidate will have the following skills and experience:

  • A strong background in machine learning systems and data engineering, with a deep understanding of open-source technologies used in these domains
  • Experience with modern ML frameworks and tooling, including PyTorch, JAX, Apache Arrow, Parquet, Polars, Ray and related training and inference tooling
  • Familiarity with GPU/accelerator workflows, CUDA-based software packaging and the practical realities of running ML workloads at scale is highly valued
  • Proven track record in a technology-driven role, preferably within a machine learning, data science or ML infrastructure team
  • Expertise in using and contributing to open-source software, particularly projects that underpin machine learning, data processing and numerical computing
  • Proficiency in languages such as Python, C++, Rust, or Go, with exposure to CUDA or other GPU programming and familiarity with development platforms such as GitHub, GitLab and Bitbucket
  • Ability to collaborate effectively across diverse teams and with external open-source communities to drive mutual technological advancements
  • Commitment to continuous personal and professional development, demonstrated through a history of pursuing technical certifications, workshops and seminars

Why join us?

  • Highly competitive compensation plus annual discretionary bonus
  • Lunch provided (via Just Eat for Business) and dedicated barista bar
  • 30 days annual leave
  • 9% company pension contributions
  • Informal dress code and excellent work/life balance
  • Comprehensive healthcare and life assurance
  • Cycle-to-work scheme
  • Monthly company events
Location: London
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Jonathan Open Source Evangelist

"Out of all the places where I've worked, it's the only place where I can say that I'm constantly learning from my colleagues. I really feel like this has made me grow a lot."

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What our people say

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David Director of Open Source Development

"Knowing that we make a difference to the bottom line of our business while also doing good for others in a collaborative way brings an extra layer of satisfaction to my day."

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Ivan DevOps Engineer

"I'm exposed to many different technologies and I get to learn the basics and then develop my skills with that technology further."

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Caterina Director of Open Source Developer Experience

"We have the built-in advantage of a collaborative culture, working with open source software developers who are global and come from all different kinds of backgrounds and environments."

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Adam ML Open Source Software Manager

"I get to build software that solves real problems for my colleagues, while also being part of the global Open Source community."

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Peter Quantitative Research Intern

"My internship was a hugely valuable experience that sharpened my skills and gave me a new perspective on building models with real-world impact."

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Matteo Quantitative Research Intern

"One of the things that has truly stood out to me is the collaborative and welcoming culture. I hadn’t expected such a supportive environment but it’s been one of the main reasons I’ve enjoyed working here from day one."

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Margot HRIS manager

"I enjoy how dynamic the work environment at G-Research is. It keeps you busy and continuously creates opportunities to develop yourself and your career, too."

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Mario FPGA Manager

"While some people might think working in finance may not be too exciting, at G-Research, it is, especially if you see it as a problem to solve. How do we solve this algorithm? How do we get faster? This is why I think people are really excited to work here."

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Alexander Software Engineer

"I've felt very lucky to work with teams of people across the business who are generous with their time, knowledge and ideas as we collaborate to continuously build and rebuild complex systems with lots of moving parts."

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Simon Cyber Security Manager

"There are lots of people within the business that have started as a junior and progressed – which I think is testament to G-Research's belief in fostering growth and recognising potential."

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Our Benefits

Our benefits are designed with our people in mind, with a wide range of flexible options tailored to your needs.

Finance
  • Company pension scheme
  • Annual discretionary bonus scheme
  • Season ticket loan
  • Give as you Earn (GAYE)
  • Risk protection benefits
  • Charity fundraising matching scheme
  • Generous relocation and immigration assistance
Health
  • Comprehensive private health insurance, including GP access, dental and vision
  • Enhanced health support for male and female health, fertility, family forming, maternity and menopause journeys
  • Healthcare cash plan covering a wide range of routine and complimentary healthcare expenses
  • Employee Assistance and Wellness Programmes
Lifestyle
  • 30 days’ annual leave, with an extra five days for those who are office based
  • Enhanced leave polices to support our people and their family needs
  • Back-up dependent care for children, adults and pets
  • Complimentary travel insurance for our people and their families
  • Cycle schemes
  • Gym and Fitness membership subsidies
  • Free lunch and complimentary barista bar
  • Regular company socials
  • Informal dress code and excellent work-life balance
  • Talks from world-class guest speakers
We want benefits to work for our people and use a flexible benefits platform to support this – colleagues can opt-in or out of certain benefits and can customise cover levels depending on their lifestyle and personal needs.