Senior Software Engineer – AI Fintech

Hopper

Machine Learning Engineer designing and implementing ML systems for Hopper's pricing engine. Collaborating closely with Data Science, Engineering, and Product teams to optimize pricing solutions.

Posted 4/20/2026full-timeRemote • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

ETLPythonScalaSQL

About the role

Key responsibilities & impact

Design and implement automated, reusable training pipelines to ensure consistent, scalable model delivery across the partner portfolio
Build ETL pipelines with thoughtful feature engineering to guarantee clean, reliable inputs for pricing models
Develop and deploy real-time ML pricing solutions to production, owning the full path from model to live environment
Monitor production systems for latency, drift, and training-serving skew, optimising continuously to maintain model integrity
Run champion-challenger tests on pricing and product construction levers to surface improvements and respond to shifting market conditions
Partner with data scientists, engineers, and product stakeholders to translate business needs into well-scoped technical solutions

Requirements

What you’ll need

5+ years of experience in a similar role, ideally within production ML systems or large-scale pricing platforms
Proficiency in Python, Scala, and SQL, applied to production ML systems rather than exploratory work
Experience in data modelling, software architecture, and distributed data processing frameworks at scale
Deep understanding of ML algorithms and when to apply them in the context of pricing, demand forecasting, or similar commercial domains
Strong analytical instincts and attention to detail, with a track record of catching issues before they reach production
A product mindset that keeps the customer outcome in view, even when the work is deeply technical
Clear, collaborative communication skills that hold up across data science, engineering, and business stakeholder audiences

Benefits

Comp & perks

Well-funded and proven startup with large ambitions, competitive salary, upsides of pre-IPO equity packages.
Hopper covers 100% of the premiums for the employee for a group insurance plan through Vitality Health.
Automatic contributions when you start with Hopper through Smart Pension.
Please ask us about our very generous parental leave, much above industry standards!.
Access to co-working space on demand through FlexDesk AND Work-from-home stipend.
Carrot Cash travel stipend.
Unlimited PTO.
Entrepreneurial culture where pushing limits and taking risks is everyday business.
Open communication with management and company leadership.
Small, dynamic teams = massive impact

ATS Keywords

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Hard Skills & Tools

PythonScalaSQLETL pipelinesfeature engineeringML algorithmsdata modellingsoftware architecturedistributed data processingreal-time ML solutions

Soft Skills

analytical instinctsattention to detailproduct mindsetcollaborative communication