Alexander B.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I help businesses design data platforms from scratch, build reliable pipelines, and troubleshoot complex Spark performance issues using Databricks, AWS, and Azure. Working in data engineering since 2022, I combine strong PySpark, Python, and SQL development skills with a background in database administration, performance tuning, and cloud migrations. My experience spans telecommunications, VoIP, banking, healthcare, and fintech, adapting technical solutions to different business needs. I can take your project from initial requirements and architecture through development, deployment, and production support. How I can help: - Data architecture: Design complete data solutions covering ingestion, storage, transformation, orchestration, and analytics—with scalability, security, maintainability, and cost in mind. - PySpark, Python, and SQL: Develop reliable ETL/ELT pipelines, reusable transformations, and automation with clean, maintainable code. - Spark performance optimization: Troubleshoot slow or failing workloads, identify root causes, and improve processing time, resource usage, and reliability. - AWS, Azure, and Databricks: Build and improve cloud data platforms, including experience with AWS Glue, Athena, Redshift, DynamoDB, and Firehose. - Data governance and quality: Implement controlled access, clear ownership, documentation, and traceability. Enforce quality through automated validation, monitoring, and handling of invalid records. - Development lifecycle and CI/CD: Deliver across requirements, design, coding, testing, version control, CI/CD, deployment, and ongoing maintenance. - Team collaboration: Contribute to engineering teams through code reviews, technical discussions, and structured delivery using Jira. Strong problem-solving and fast learning are central to how I work. I get up to speed quickly on unfamiliar technologies, codebases, and business processes. I ask focused questions, investigate root causes, and deliver practical solutions that your team can operate and maintain. I also use AI-assisted development to accelerate coding, debugging, testing, and documentation, while reviewing and validating the results for accuracy, quality, and reliability. Whether you need a new data platform, a faster Spark pipeline, or an experienced engineer to strengthen your team, I bring hands-on expertise, clear communication, and ownership from design through delivery. Tell me what you’re building or what needs fixing, and let’s discuss how I can help.