Senior Data Scientist

Dice is the leading career destination for tech experts at every stage of their careers. Our client, Simple Solutions, is seeking the following. Apply via Dice today! Senior Data Scientist with Fraud Detection & Time Series Analysis Washington, D.C (Hybrid) Long-term contract role Minimum Qualifications: • Work or educational background at minimum of a Master's degree in one or more of the following areas: machine learning, computational linguistics, Fraud Analysis, Time series Analysis, deep learning, ratification intelligence, data science and/or data analytic, generative AI, symbolic AI, causal AI, operations research, computer science, Mathematics, business analytics, or knowledge management. • 8-10 years of demonstrated experience programming with R/Python, Linux, and Spark in AWS cloud environment, or knowledge and algorithmic design experience in Python (3+ years) • Proficient with Amazon AWS Sagemaker, Jupyter Notebook and Python Scikit, Deep Learning, Machine Learning tools such as TensorFlow • Experience with image processing models such as Coco, CLIP, ResNet or comparable models • Demonstrated experience with machine learning techniques including natural language processing, and Large language Models (GPTv4-o1, o3, OpenAI APIs, Llama, Claude, etc). • Experience developing AI agents and development proficiency using agentic programming • Proficient in FRAUD DETECTION and Time Series Analysis plus Natural language processing (NLP) and Natural language generation (NLG) including prior projects in any of the following categories: top modeling of text, sentiment analysis of text, part of speech tagging, Name Entity Recognition (NER), Bag of Words, text extraction • Experience building and working with any of these components: Vector DB, BERT, RoBERTa (or comparable tools), Spacy, LLM and GenAI tools. Experience with LoRA, LangChain, RAG, LLM Fine Tuning and PEFT, Knowledge Graphs. • Strong skills in developing GraphRAG, Chain of Thought (CoT), Tree of Thought (ToT), Reinforcement learning and AI development architectures with Human-in-the-Loop (HITL) • Demonstrated experience with SQL and any relational database technologies, such as Oracle, PostgreSQL, MySQL, RDS, Redshift, Hadoop EMR, Hive, etc. • Demonstrated experience processing structured and unstructured data sources, data cleansing, data normalization and prep for analysis • Demonstrated experience with code repositories and build/deployment pipelines, specifically Jenkins and/or Git/GitHub/GitLab. • Demonstrated experience using Tableau, or Kibana, Quicksights or other similar data visualizations tools. • Very comfortable working with ambiguity (e.g. imperfect data, loosely defined concepts, ideas, or goals) Required: • At least a Master's degree in Computer Science or any field related to AI. • Experience working with big data in AWS and using libraries such as PySpark. • Experience in time series forecasting and machine learning models. • Experience working with generative AI. • Experience working with log file analysis and tools such as Splunk. Qualifications & Requirements • Education: MS in Computer Science, Statistics, Math, Engineering, or related field, Master's required. • 3+ years of relevant experience in building large scale machine learning or deep learning models and/or systems • 1+ year of experience specifically with deep learning (e.g., CNN, RNN, LSTM) • 1+ year of experience building NLP and NLG tools. • Experience with wide range of LLMs (Llama, Claude, OpenAI, Cohere, etc.), LoRA, LangChain, RAG, LLM Fine Tuning and PEFT are preferred. • Demonstrated skills with Jupyter Notebook, AWS Sagemaker, or Domino Datalab or comparable environments • Passion for solving complex data problems and generating cross-functional solutions in a fast-paced environment • Knowledge in Python and SQL, object oriented programming, service oriented architectures • Strong scripting skills with Shell script and SQL • Strong coding skills and experience with Python (including SciPy, NumPy, and/or PySpark) and/or Scala. • Knowledge and implementation experience with NLP techniques (topic modeling, bag of words, text classification, TF/IDF, Sentiment analysis) and NLP technologies such as Python NLTK, or Spacy or comparable technologies • Knowledge and implementation experience with statistical and machine learning models (regression, classification, clustering, graph models, etc.) Preferred Qualifications • Hands on experience building models with deep learning frameworks like Tensorflow, Keras, Caffe, PyTorch, Theano, H2O, or similar • Experience with LLM Agents, Agentic programming • Experience with search architecture (for instance: Solr, ElasticSearch, AWS OpenSearch) • Experience with building querying ontologies such as Zeno, OWL, RDF, SparQL or comparable are preferred • Knowledge & experience with microservices, service mesh, API development and test automation are preferred • Demonstrated experience using Docker, Kubernetes, and/or other similar container frameworks are preferred