Staff Machine Learning Engineer (Credit International ML)

The role

You will be a technical leader building production-grade models to power credit lending decisions in Europe and Australia. You will design, implement, and scale advanced ML solutions and set technical strategy for your team.

What you will do

• Set technical strategy for the team on a year-long time scale
• Collaborate with ML Platform, product, engineering, and risk leadership
• Define and advocate for technical solutions and operational processes
• Foster a culture of quality and ownership by setting code review and design standards
• Develop talent by providing feedback and guidance
• Provide hands-on technical leadership with code and architecture

Required qualifications

• 8+ years of experience researching, designing, deploying, and operating large-scale, real-time machine learning systems
• A relevant PhD can count for up to 2 YOE
• Strong Python skills
• Experience writing production-quality code
• Experience building and evaluating models for tabular classification problems
• Experience with gradient-boosted decision trees like LightGBM/XGBoost
• Experience with deep learning frameworks like PyTorch
• Experience working with distributed data processing or parallel compute frameworks (e.g. Spark, Ray)
• Experience with ML lifecycle tooling for training orchestration, experimentation, and model monitoring (e.g. Kubeflow, Airflow, MLflow)
• Proficient in using AI-powered developer tools (e.g. Claude Code, Codex, Cursor)
• Strong engineering skills
• Strong verbal and written communication skills

Benefits

• Base pay, equity, and comprehensive benefits
• Flexible spending wallets for technology and wellbeing up to 1390 zł per month
• Competitive paid time off, paid public holidays, and additional paid Away Days
• Comprehensive private healthcare through Lux Med's Platinum package
• MultiSport card
• Learning and development programs
• Family healthcare support through Maven and parental leave support through Parentaly
• Mental well-being support through Lyra including up to 12 confidential counseling or coaching sessions each year
• Financial well-being support through Northstar with unlimited access to Certified Financial Advisors
• Employee Resource Groups (ERGs)
• Eligibility for creative tax benefits
• Health coverage at no cost covering 100% of premiums for employees and dependents

About the company

Affirm provides a clear, predictable way to pay over time with no hidden fees, no surprises, and no tradeoffs. The company is a remote-first organization.