Maksim Rakhmanin
Verified Expert in Engineering
Data Architect and Developer
Yerevan, Armenia
Toptal member since June 5, 2026
Maksim is a data architect with 15+ years of experience designing and building data-centric applications. He operates across data engineering, data architecture, performance optimization, and data migration. Maksim's clients include top global pharma companies and leading telecoms such as Telefonica. He has scaled and led a 50+ person data engineering department, building partnerships with Databricks and Google.
Portfolio
Experience
- ETL Development - 15 years
- Data Architecture - 15 years
- SQL - 15 years
- Oracle - 10 years
- Data Migration - 7 years
- Big Data Architecture - 7 years
- Spark SQL - 5 years
- Databricks - 5 years
Preferred Environment
SQL, Python 3, Databricks, Oracle, Azure, AWS IoT, Apache Airflow
The most amazing...
...project I've led is the RWE data platform development. It confirms COVID-19 vaccine efficacy and adjusts dosage for rare genetic diseases and cancer treatments.
Work Experience
Head of Data Engineering
Quantori
- Built a real-world data analytics platform for leading pharmaceutical companies to generate clinically relevant insights. The platform provided evidence confirming COVID-19 vaccine efficacy and optimized dosing for a rare genetic disease treatment.
- Led the design of a cloud-based Data Lake in Azure for a European pharmaceutical company. Our team analyzed 130+ systems and mapped business processes across core departments. The platform directly reduced labor costs in R&D projects.
- Set up a data engineering department of 50+ specialists, forming technology-focused teams that secured partnerships with Databricks and Google. Built a student training program that prepared 100+ specialists, and the top 10% hired into the company.
Data Migration Architect
Netcracker
- Delivered a Big-Bang migration for a LATAM telco with data quality above 99.5%. The migration enabled a seamless overnight cutover from the legacy BSS/OSS stack to the Netcracker platform.
- Designed and implemented a zero-downtime, on-demand customer data migration solution for a UK mobile operator. The solution minimized disruption to both business operations and customer experience.
- Established a data migration center of excellence. Delivered training sessions, supervised students at educational centers, and wrote data migration methodologies.
- Developed tools that automated up to 80% of ETL code generation from design specifications and introduced a data quality framework. Both were adopted as standard practice across subsequent migration projects.
Senior Oracle Developer
AT Consulting
- Built a bespoke solution for ETL unit testing. The system was successfully implemented across most of the company's BI/DWH projects. Made a significant shift towards TDD methodology for ETL development.
- Created a CI system in full accordance with the following requirements, including release preparation, test environment support, and system self-test execution.
- Increased the scope of the supported ETL tools to PC Informatica, Oracle Warehouse Builder, IBM DataStage, and PL/SQL packages.
Experience
Scalable Research Data Platform
https://quantori.com/files/BioTechX_2024_-_Quantori.pdfEducation
Engineer’s Degree in Mathematics and System Programming
Voronezh State University - Voronezh, Russia
Skills
Tools
Spark SQL, Apache Airflow
Languages
SQL, Python 3, C++98
Platforms
Databricks, Oracle, Azure, AWS IoT
Storage
PostgreSQL, ClickHouse, Databases, PL/SQL
Paradigms
Parallel Programming, ETL
Other
Data Migration, Big Data Architecture, Data Architecture, ETL Development, System Design, System Programming, Data Warehousing, Informatica, Data Governance, Data Quality, Azure Data Lake, Azure Databricks
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