Machine Learning Engineer

About the Data Organization:The Data team at Loop is on a mission to empower merchants with transformative data products that drive success beyond returns. By building tools that merchants love and fostering a robust data culture, the team enables smarter decision-making across the board. Whether creating insights to guide merchants’ strategies or strengthening internal data-driven processes, the Data team is integral to shaping Loop’s future and unlocking new opportunities for our merchants and teams alike.
About the Role:As a Machine Learning Engineer at Loop, you’ll help turn advanced data capabilities into products that make it easier for merchants to run and grow their businesses. You’ll collaborate closely with the rest of the Data team, Software Engineers, and Product Managers to explore ideas, prototype solutions, and ship machine learning systems that make our merchants’ workflows more efficient, shopper experiences more seamless, and Loop’s products more intelligent. Whether supporting a model already in production or helping design something new, your work will help unlock value for merchants in moments that matter. This is a hands-on, high-impact role where you’ll grow your skills while contributing meaningfully to the future of Loop’s product experience.
Our Blended Work Environment:At Loop, we’re intentional about the way we work so that we can do our best work. We call this our Blended Working Environment. We work from our HQ in Columbus, OH, or one of our Hub or Secluded locations, and are distributed throughout the United States, select Canadian provinces, and the United Kingdom. For this position, we’re looking for someone to join us in Columbus, OH; Chicago, IL; Austin, TX; or Los Angeles, CA.
Our Tech Stack:For ML model development and deployment, we use the AWS ML ecosystem, Airflow, Kubernetes, and Fast API, among other tools. Our backend data infrastructure is supported by Fivetran, dbt, Snowflake, Hex, Secoda, GoodData

What You’ll Do:

• Work collaboratively with cross-functional partners, including software engineers, product managers, operations, and the rest of the Data team, to scope ML use cases, refine model requirements, and support delivery of features that drive merchant value.
• Support the development and deployment of ML solutions, contributing to model training, evaluation, and iteration with guidance from more senior team members. 
• Help design and maintain data pipelines and infrastructure that support reliable, scalable ML systems.
• Contribute to the way we build responsibly with machine learning at Loop, contributing to best practices, tools, and lightweight processes that expand our capabilities.
• Stay curious and engaged with the broader ML community to continue growing your skills and bringing new ideas into the team.

Your Experience:

• 5–8 years of experience since completing your undergraduate studies; we welcome candidates with advanced degrees (like a PhD) and those with nontraditional paths who’ve gained equivalent experience through hands-on work. 
• 2-3 years of experience as an ML engineer, data scientist, applied scientist, or other applied ML practitioner in a production environment. 
• Proficient in Python and familiar with ML libraries such as Scikit-Learn, PyTorch, or TensorFlow. 
• Solid understanding of classical  ML techniques such as regression, classification, clustering, and time series modeling, as well as deep learning frameworks such as CNNs, RNNs, GNNs, and transformers. 
• Familiarity with deploying models into production and monitoring performance over time, even if not the lead on those systems. 
• Comfortable writing production-quality code and querying data with SQL. 
• Excellent communication skills, especially when collaborating across functions or explaining technical concepts to non-technical stakeholders. 
• An interest in ethical ML practices and a thoughtful approach to building systems that are fair, interpretable, and grounded in real-world use.

Nice-to-have Experience:

• Contributions to open-source ML projects and libraries.
• Experience with agile software development methodologies like Scrum or Kanban.
• Knowledge of container technologies like Docker and orchestration tools like Kubernetes.
• Knowledge of dbt.

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Loop Story
In a perfect world, Loop wouldn't exist. If we had our way, we'd live in a world where we're mindful about how we consume, we love every product we own, and we share values with the brands who create them. In reality, commerce isn't perfect and often breaks. Loop creates second chances.
We're starting by revolutionizing the post-purchase experience. We've taken one of the most fragile commerce interactions - returns - and turned it into something consumers actually love, and that deepens our connection to brands and products.
We take connection seriously on the inside, too. We're building a work experience that allows you to Be A Human First and prioritizes empathy and wellbeing. We view Loop as a special place in your career to shape the future of an industry and become a better person while doing it. You can grow faster here in a shorter amount of time - we'll give you space and trust you to fill it.
Learn more about us here: https://loopreturns.com/careers.
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