
Muhib Ullah Khan
Verified Expert in Engineering
Data Engineering Consultant and Developer
Berlin, Germany
Toptal member since January 5, 2022
Muhib is a data engineering professional and tech lead with more than 12 years in the field. With his expertise in Databricks, Spark, SQL, feature stores, data modeling, governance, and cloud infrastructure automation (Terraform), he helps organizations integrate and optimize complex data pipelines for real-time AI/ML and GenAI applications. His strategic thinking, focus on data quality, observability, and operational readiness make him highly qualified for enterprise data and AI projects.
Portfolio
Experience
- SQL - 10 years
- Python - 7 years
- PySpark - 6 years
- Spark - 6 years
- Databricks - 6 years
- Delta Live Tables (DLT) - 5 years
- Data Mesh - 4 years
Work Experience
Senior Data Engineer | Tech Lead
HelloFresh USA
- Architected and standardized organization-wide feature engineering pipelines; implemented operational readiness criteria and standardized platform tooling to significantly accelerate machine learning time-to-production.
- Exercised full platform administration authority over 10+ enterprise Databricks workspaces, designing cost-optimization models, workspace governance, and secure access control policies to ensure high platform stability.
- Integrated robust end-to-end data observability and quality frameworks (Soda), establishing real-time tracking systems for data platform health, latency, and core performance metrics.
- Engineered enterprise GenAI data infrastructure, helped with the integration of LLM into the core product, replacing the time-consuming editorial process and reducing the time by 8x from raw to curated customer-ready content.
Data Engineer (via Toptal)
HelloFresh USA
- Developed a centralized feature store to serve quality machine learning features for data science models across the company, reducing repetitive feature engineering work and enabling data science teams to ship ML models faster.
- Collaborated with multiple teams and helped them onboard to the feature store and MLOps platform, allowing them to reuse quality ML features and seamlessly deploy their ML applications.
- Developed a framework to improve data quality for critical data assets, further enhancing the performance of ML models, resulting in more accurate predictions.
- Mentored engineers and data scientists on good feature engineering practices and held workshops highlighting the impact of data quality and observability on machine learning models.
- Set up Databricks Delta Live Table (DLT) cluster policy and implemented DLT pipelines to automate workloads on observability, data quality, usage, and metrics collection.
Lead Data Engineer
Digifloat
- Led a product development team working on improving the time and cost of operationalizing raw and scattered data to be readily available for further analysis and reporting.
- Architected data pipelines for clients using Apache Airflow, Apache Spark, Azure Databricks, ADLs, Azure Synapse Analytics, and Snowflake. Helped them overcome their warehousing challenges.
- Designed a warehousing solution for automobile data from different sources and defined standardized fact and dimension tables. The warehouse data would be consumed by Power BI to generate reports based on clients' requirements.
- Provided any services clients needed as a data consultant.
Data Engineering Consultant
Contour Software
- Worked as a consultant to fix bugs and optimize reporting queries that increased the reporting efficiency by 50 percent.
- Ingested and integrated data from a legacy application into the company's SQL Server database and performed transformations to meet customers' requirements.
- Migrated millions of data files from AWS S3 to a remote Microsoft Windows Server using S3 CLI scripts in PowerShell to authenticate on S3, download each file using the metadata table, and store files on the target location.
- Implemented an OCR system using Azure Cognitive Search that automated the whole data extraction process from PDF reports that was previously done manually.
Senior Software Engineer | Database Developer
Strategic Systems International
- Integrated more than five data sources with the data warehouse, thus enabling clients to analyze their historical data and make future business strategies.
- Implemented a data pipeline using Azure Event Hubs, Azure Databricks, PySpark, and SQL to ingest and transform real-time factory data that powered a mobile app displaying real-time dashboards.
- Introduced automated ETL process using SSIS and SQL jobs that saved developers time on repetitive tasks.
- Migrated SQL Server databases to a big data platform consisting of HDFS and Apache Hive to perform data analysis. Used Apache Kylin to build cubes on top of Hive tables resulting in a faster query response of up to ten times.
- Provided database support on four different projects at a time to help other teams meet their deadlines.
Database Developer
Zin Technologies
- Worked in a team to fix bugs and participated in more than 15 production releases that made the production environment more reliable and increased the amount of revenue generation.
- Optimized poorly written stored procedures causing timeout during bulk data processing and peak hours. This work reduced the number of customer complaints and increased the overall performance.
- Developed SSIS package to extract real-time data of connected GSM devices from multiple servers and load them into a centralized billing engine which proved to be an efficient way of data migration.
- Monitored server health and various performance metrics using Nagios and SQL Server jobs as a database administrator.
Project History
Feature Store for AI Applications
In-house Data Quality Framework
Ownership and Support for Databricks
Analytics for a Car Manufacturing Brand
Pocket Factory App for a Soda Manufacturing Company
Data Conversion for a US-based Company
Embedded SIM (eSIM) Project
Power BI Visualizations for Food Delivery Service
Agentic Application for Content Generation
I was responsible for designing and scaling the application's underlying data infrastructure. This involved curating historical enterprise data to build a high-fidelity context layer, implementing a multi-modal Retrieval-Augmented Generation (RAG) system, and optimizing prompts to ensure accurate model outputs. I also engineered a specialized, high-throughput asset store for approved and AI-generated imagery, creating a unified source of truth that served both multi-modal model inputs and downstream evaluation pipelines. Finally, I leveraged application logs and model responses to build an observability pipeline that generated content quality metrics, establishing a continuous feedback loop that maximized generation efficiency and minimized API costs.
Certifications
Azure Certified Data Analyst
Microsoft
Azure Certified AI Engineer
Microsoft
Microsoft Azure Data Engineer Associate
Microsoft
Skills
Libraries/APIs
PySpark
Tools
Git, AWS Glue, Claude Code, Microsoft Power BI, Nagios, Apache Airflow, Microsoft Teams, Soda SQL, Prefect, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS), Terraform, GitHub
Languages
SQL, Python, Transact-SQL (T-SQL), YAML, Snowflake
Platforms
Databricks, Azure, Amazon Web Services (AWS), Azure Synapse, Apache Kafka
Storage
Microsoft SQL Server, Relational Databases, Data Lakes, DB, SQL Server Integration Services (SSIS), Data Pipelines, Azure SQL, Database Administration (DBA), MySQL, PostgreSQL, Database Architecture, SQL Server Analysis Services (SSAS), RDBMS, Microsoft Entra ID
Frameworks
Apache Spark, Delta Live Tables (DLT), Spark, AWS HA
Paradigms
ETL, DevOps
Other
Data Engineering, Data Warehouse Design, Star Schema, ETL Tools, ETL Pipelines, Medallion Architecture, Data Warehousing, Azure Databricks, Feature Engineering, Data Quality, Data Modeling, Data Governance, Data Mesh, Tecton, Back-end, Architecture, Solution Architecture, Amazon RDS, Query Optimization, Dashboards, Data Architecture, Artificial Intelligence (AI), Azure Data Lake, Azure Data Studio, Data Analysis, Cloud Infrastructure, Machine Learning, ML Pipelines, Maintenance, Operations, Administrative Support, Spark/PySpark, Generative Artificial Intelligence (GenAI), Observability, Databricks Unity Catalogue, Delta Lake, Machine Learning Operations (MLOps), RAG Architecture, Embeddings from Language Models (ELMo), Vector Data, Large Language Models (LLMs), RAG Pipelines, Semantic Search, Model Evaluation, Metrics, APIs, Data Analytics, Large Language Model Operations (LLMOps), Gemini API, Amazon Bedrock AgentCore, Software Architecture
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