# Senior Machine Learning Engineer

**Company:** [Reddit](https://hotfix.jobs/companies/reddit)
**Location:** Remote
**Role:** ML Engineering
**Experience:** 5+ years
**Skills:** Python, Java, Go, Xgboost, Random Forests, Transformers, Cnns, Gnns, PyTorch, TensorFlow, Spark, Kafka, Ray, Airflow, BigQuery
**Posted:** 2026-08-13

> Build and operate production machine learning systems for recommendations, search, advertising, content understanding, and LLM-powered experiences at internet scale. The role requires 3–5+ years of production ML experience, strong programming and software engineering fundamentals, and expertise with modern ML frameworks and scalable pipelines.

## Job Description

## Responsibilities
- Design, build, and deploy production-grade machine learning models and systems at scale.
- Own the full ML lifecycle, from problem definition and feature engineering through training, evaluation, deployment, and monitoring.
- Build scalable data and model pipelines with strong reliability, observability, and automated retraining.
- Work with large-scale datasets to improve ranking, recommendations, search relevance, prediction, content and user understanding, and optimization systems.
- Partner cross-functionally with Product, Data Science, Infrastructure, and Engineering teams to translate complex problems into ML solutions.
- Improve system performance across latency, throughput, and model-quality metrics.
- Research and apply state-of-the-art machine learning and AI techniques, including deep learning, graph-based models, transformers, and LLM evaluation and alignment.
- Contribute to technical strategy, architecture, and the long-term ML roadmap.

## Requirements
- 3–5+ years of experience building, deploying, and operating machine learning systems in production.
- Strong programming skills in Python, Java, Go, or similar languages, with solid software engineering fundamentals.
- Strong grasp of machine learning algorithms, including XGBoost, random forests, regressions, transformers, CNNs, and GNNs.
- Hands-on experience with modern ML frameworks such as PyTorch and TensorFlow.
- Experience designing scalable ML pipelines, data-processing systems, and model-serving infrastructure.
- Ability to work cross-functionally and translate ambiguous product or business problems into technical solutions.
- Experience improving measurable metrics through applied machine learning.

## Nice-to-haves
- Experience with recommender systems, search and ranking systems, advertising or auction systems, large-scale representation learning, or multimodal embedding systems.
- Familiarity with distributed systems and large-scale data processing, including Spark, Kafka, Ray, Airflow, BigQuery, and Redis.
- Experience working with real-time systems and low-latency production environments.
- Background in feature engineering, model optimization, and production monitoring.
- Experience with LLM and generative AI techniques, including LLM evaluation, alignment, fine-tuning, knowledge distillation, RAG, agentic systems, and productionizing LLM-powered products at scale.
- Advanced degree in Computer Science, Machine Learning, or a related quantitative field.

## Benefits
- Comprehensive healthcare benefits and income replacement programs.
- 401(k) with employer match.
- Global benefits programs supporting workspace, professional development, caregiving, and lifestyle needs.
- Family planning support.
- Gender-affirming care.
- Mental health and coaching benefits.
- Flexible vacation and paid volunteer time off.
- Generous paid parental leave.

## Similar jobs

- [Senior AI Engineer](https://hotfix.jobs/jobs/8b741bc4-bcf4-41fa-a738-e05371dd7267) - Dialpad - Vancouver, Canada - CA$185k – CA$214k/yr
- [Senior Machine Learning Engineer, Economist](https://hotfix.jobs/jobs/be808d21-6efa-4349-9efe-087188c17002) - Instacart - Remote - $173k – $219k/yr
- [Senior Machine Learning Engineer](https://hotfix.jobs/jobs/083e1f7a-61b8-4297-a585-fe35a63d14cb) - Censys - Remote - $151k – $191k/yr
- [Senior Software Engineer II , Marketplace](https://hotfix.jobs/jobs/e62719a6-4b3e-4dfd-92c3-459395da7284) - Apartment List - Remote - $145k – $207k/yr
- [Senior Machine Learning Engineer, Digital Twin Platform](https://hotfix.jobs/jobs/28af327a-e514-49c0-9292-c20a6bd722ec) - Instacart - Remote - $201k – $254k/yr

**Apply:** https://hotfix.jobs/jobs/b5676e76-1632-4286-8f1e-06b728e40df0
**Canonical:** https://hotfix.jobs/jobs/b5676e76-1632-4286-8f1e-06b728e40df0