Principal Data Scientist

You will be:

• Working on frontier problems: where there is no obvious baseline, benchmark or established definition of success. You will be expected to define what good looks like, and bring the rigour needed to reach a meaningful conclusion.
• Raising the ceiling on models already in production: working closely with the pods that own to make live predictions measurably better.
• Taking problems end-to-end: moving across pods and owning substantial projects from initial exploration all the way through to long-term maintenance, ultimately delivering robust, production-grade solutions.
• Turning research into impact: identifying emerging approaches, formulating hypotheses, designing rigorous experiments, evaluating new techniques and translating research into practical solutions that work in the real world.
• Building the capability of Data Science: through technical review, pairing and mentoring, setting the standards for how we work, and by being the person analysts, engineers and product managers bring their hardest questions to.
• Leading the Data Science Guild: setting the technical agenda and creating the forum where the significant questions across the practice are surfaced, challenged and worked through.

You Are

• A demonstrably strategic, high-impact individual contributor: experienced enough to lead complex projects across Data Science, Machine Learning and AI, while remaining hands-on and capable of building and deploying production-grade models.
• Deeply grounded in ML/AI: strong in the theoretical and mathematical foundations of the field, with the ability to engage critically with current research and emerging methodologies.
• Engineering-grounded across the full ML lifecycle: comfortable owning your own code to production standard, from experiment design and model development through validation, deployment, monitoring and long-term maintenance.
• Deeply trained in a quantitative discipline, ideally educated to PhD level in Computer Science, Statistics, Applied Mathematics, Physics or a related field. Equivalent depth developed through industry experience is equally valued, we care about the depth of expertise rather than the credential.
• Fluent in Python and broad in your modelling toolkit: with strong experience across regression and classification, clustering, time-series analysis, anomaly detection, sequence-to-sequence architectures and stochastic optimisation.
• Comfortable with solving ambiguous problems: able to start with an abstract question, interrogate it, decide what is worth solving, choose an approach, commit to a conclusion and determine your own next steps without waiting to be directed.
• A force multiplier for the people around you: able to take a whole team's capability up a level through review, pairing, mentoring and the standards you set. Your success is measured not only by what you personally ship, but by what the team is capable of doing a year after you arrive.
• Credible with non-technical stakeholders: able to explain modelling trade-offs clearly, set expectations around what is and isn't knowable, negotiate scope and hold a technical position under pressure without losing the room.
• Energised by hard, real-world problems: curious about how energy markets behave and driven to understand the underlying dynamics. Comfortable challenging and being challenged by analysts and technologists and turning that understanding into better decisions and models.

Awesome if you

• Have experience in energy: either from working directly in the sector or through a strong understanding of energy systems, markets and their operational dynamics.
• Have quantitative trading experience: particularly around arbitrage, strategy development, backtesting and risk management across physical or derivative assets.
• Have worked with frontier AI techniques: including transformer architectures, generative models or agentic AI, particularly where models need to operate reliably in operational or time-sensitive environments.
• Enjoy flexible hybrid working – split your time between home and our office, with the freedom to work where you’re most productive.

What we offer

• A vibrant, diverse company pushing ourselves and the technology to deliver beyond the cutting edge
• A team of motivated characters and top minds striving to be the best at what we do at all times
• Constantly learning and exploring new tools and technologies
• Acting as company owners (all Vortexa staff have equity options)– in a business-savvy and responsible way
• Motivated by being collaborative, working and achieving together
• Private Health Insurance offered via Vitality to help you look after your physical health
• Global Volunteering Policy to help you ‘do good’ and feel better