Kostiantyn

KOSTIANTYN KUZMYCHOV
DATA ENGINEERING LEAD | DATA PLATFORM & DWH ARCHITECT
[відкрити контакти](див. вище в блоці «контактна інформація») • [відкрити контакти](див. вище в блоці «контактна інформація») (Portugal) • [відкрити контакти](див. вище в блоці «контактна інформація») (Ukraine) •
[відкрити контакти](див. вище в блоці «контактна інформація»)

PROFESSIONAL SUMMARY
Hands-on data engineering and platform leader with 19+ years of experience designing, building, and operating
enterprise data warehouses and production ETL/ELT workflows. Deep expertise in SQL, Python, Oracle,
MySQL, ClickHouse, Postgres, Snowflake, data modeling, cross-system integrations, performance optimization,
and production observability. Combines architecture ownership with practical delivery: builds pipelines, reviews
code, resolves reliability and data-quality issues, documents workflows, and partners across engineering and
business teams to turn complex data processes into durable, supportable platforms. Highly adaptable Data
Engineer with proven experience in rapidly mastering new tools and frameworks. Leverage advanced search,
technical documentation, and AI-assisted engineering workflows (e.g., Copilot, Codex, Claude, LLM-based
agentic workflows) to analyze, prototype, and integrate novel technologies into production with minimal ramp-up
time.

CORE EXPERTISE
Data Engineering ETL/ELT pipelines • SQL & Python automation • data
modeling • ingestion & transformation

Data Platform & Cloud Snowflake • Amazon S3 • Oracle • PostgreSQL • MySQL •
ClickHouse • IBM Netezza, AWS, GPL, OCI, Kafka

Reliability & Operations Monitoring & Grafana dashboards • performance tuning •
migration/rollback • production troubleshooting

Technical Leadership Architecture & code reviews • cross-functional delivery •
documentation • Jira, Confluence, Git, Jenkins

TECHNICAL SKILLS
Data & Databases: Oracle, Snowflake, PostgreSQL, MySQL, ClickHouse, IBM Netezza, MS SQL Server, IQ Sybase
Architecture & DWH: Data Warehouse Design (Greenfield), ETL/ELT Engineering, Multi-Tenant Systems, Sharding,
Partitioning & Caching, Data Governance, Quality & Observability.
Engineering: SQL, stored procedures (PL/SQL, T-SQL, PL/pgSQL, etc.), Python, Shell/Bash, Apache Hop,
Informatica PowerCenter, REST APIs, PHP, Java (basic), SAP Data Services (BODS)
Platform & Delivery: AWS basics, Amazon S3, Grafana, Jenkins, Git, SVN, Jira, Confluence
AI/ML & Analytics: XGBoost, LSTM, LLM Prompt Engineering & Fine-tuning, Time-Series Forecasting.
NOTE: Fast learner with strong research and AI-driven problem-solving capabilities, capable of mastering and
adopting new tech stacks and Data Engineering tools in minimal time.

PROFESSIONAL EXPERIENCE
Principal DWH Engineer & DWH Architect | Approve Leads Apr 2024 – Jul 2026
Remote | Ukraine
●Designed and maintained a scalable enterprise DWH architecture that reliably processed large data volumes
across multiple projects.
●Owned end-to-end ETL/ELT development and optimization for daily ingestion, transformation, and integration
across Snowflake, Oracle, MySQL, PostgreSQL, Sybase, and API sources.
●Built Python and Bash automation for data pipelines, reducing manual operational effort and improving data
accuracy.

Kostiantyn Kuzmychov | Data Engineering Lead

●Developed BI reports and Grafana dashboards for enterprise analytics and real-time system monitoring; delivered
forecasting models for predictive analytics and advertising optimization.

Senior DWH Engineer | JetCoders (Outsource) Dec 2021 – Apr 2024
Remote | Ukraine
●Built production ETL processes for daily multi-source data ingestion and transformation across IQ Sybase, MS
SQL Server, PostgreSQL, and Oracle.
●Led large-scale data migrations from MySQL to Oracle and Amazon S3 to Snowflake; created Tableau/Power
BI-ready views for analytics.
●Improved loading and query performance by 30–40% through indexing, partitioning, caching, and
customer-isolated data solutions.
●Designed customer-isolated loading patterns that increased efficiency without impacting other tenants.

Senior / Principal Software Engineer | Oracle Corporation (OFSC) Apr 2016 – Nov 2021
Kharkiv | Ukraine
●Led MySQL-to-Oracle and DWH migration initiatives, with ownership for architecture, data movement, and
reliability considerations.
●Performed code reviews to improve quality, performance, and maintainability; strengthened database upgrade
workflows and designed a data rollback system.
●Built Grafana dashboards and Python-based monitoring/observability tooling for real-time production performance
visibility.
●Supported architectural migration from a monolithic PHP application to Java and Kubernetes microservices.

Senior ETL / Database Developer | Luxoft Nov 2014 – Apr 2016
Kyiv | Ukraine
●Developed full data-migration processes using Informatica PowerCenter and Oracle Database for global
financial-services teams.
●Refactored a core XML-generation query, improving performance by 30% and recovering approximately five hours
of server CPU time per cycle.
●Collaborated with global teams to meet regulatory compliance requirements and deliver project outcomes.

Database Developer | Intetics Apr 2012 – Oct 2014
Kharkiv | Ukraine
●Designed and built data warehouses for Rollins Inc. and AutoTrader using Informatica and IBM Netezza, including
ETL processes, analytical reporting, and automated tests.

BI Engineer | Telesens Jan 2008 – Mar 2012
Kharkiv | Ukraine
●Gathered requirements and developed billing reports, SQL functions, and reporting modules; optimized report
performance and maintainability.

SELECTED RECOGNITION & EDUCATION
NASA Space Apps Challenge 2023 — Global Winner (Project: Oracle of DSCOVR)
Selected as 1 of 10 Global Winners out of thousands of international teams. Co-architected an AI-powered space
weather prediction system processing NASA DSCOVR satellite telemetry to forecast geomagnetic storms and
safeguard power grids and satellite networks.

Kaggle AIMO3 Competition — Mathematical Reasoning with LLMs:
Developed an LLM-based reasoning system to solve competition-level math problems using prompt engineering,
chain-of-thought, and fine-tuning.

Master’s Degree, National Aerospace University – Kharkiv Aviation Institute (2001–2007).
Master.
Kostiantyn Kuzmychov | Data Engineering Lead

CAD/CAM/CAE specialization.

Languages: English (Upper-Intermediate B2), Ukrainian (Native)

Kostiantyn Kuzmychov | Data Engineering Lead