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OLEKSII HALIMOV
S OF T WA R E D E V E L OP E R
Kyiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

PROFESSIONAL SUMMARY
Software Developer with 4+ years of experience building backend systems and data platforms. Proficient in Python, SQL,
and FastAPI, with hands-on experience in Snowflake, dbt, and cloud infrastructure across AWS and GCP. Experienced in
designing data pipelines, secure APIs, and distributed workflows that stay reliable and cost-efficient at scale.

TECHNICAL SKILLS
Languages: Python, SQL, JavaScript
Frameworks & Libraries: FastAPI, SQLAlchemy, Alembic, Scrapy, Playwright, Puppeteer, BeautifulSoup, Geopandas,
Shapely
Databases: Snowflake (Snowpark, Cortex, data shares), PostgreSQL (PostGIS), MySQL, BigQuery, Firestore, Redis
Messaging & Queues: RabbitMQ, SQS, Cloud Tasks
Cloud & Infrastructure: AWS (EC2, RDS, S3), GCP (Cloud Run, Composer, GCS), Firebase, Docker, Linux
Workflow & Orchestration: dbt, Airflow, Openflow (CDC), n8n, Boomi
AI Tools: Claude Code, Cursor

WORK EXPERIENCE
Data Engineer — IT Sanctuary (contracted to Gloo360) 07/2026 - Present
Build and maintain Data360, Gloo's data platform for 6 nonprofit organizations: layered dbt models (staging →
intermediate → core → marts) with row-level security, used through Snowflake Cortex Analyst and Cortex Agents.
Design, build and maintain the platform's ingestion layer: 10+ daily pipelines from ERP, finance, CRM, analytics and
content sources (Great Plains, Workday Adaptive, YouTube, SharePoint, PostgreSQL, Google Analytics and more) using
Snowpark, secure data shares and Openflow CDC.
Drive pipeline reliability and cost efficiency, replacing vendor dependencies and fragile scrapers with direct integrations,
and monitoring Snowflake spend (including catching and fixing a ~10x credit overrun).
Develop the platform's internal automation tooling (Cortex Code skills) that standardizes profiling, staging, testing and
deployment, backed by CI builds in ephemeral schemas.

Data Engineer — SeeTree 01/2026 - 04/2026 (4 months)
Architected and implemented automated ETL pipelines to ingest high-resolution drone imagery and satellite data into
Google Cloud Storage (GCS) and BigQuery.
Utilized Geopandas and PostGIS to process vector data and spatial metadata, ensuring accurate alignment of imagery
with field coordinates.
Managed complex data dependencies and processing triggers using Google Cloud Composer (Airflow) to ensure timely
data availability for agronomists.
Developed high-performance RESTful APIs using FastAPI to serve tree-level analytics and vegetation indices to the
client-facing dashboard.

Data Engineer — GroupBWT 01/2022 - 01/2026 (4 years)
Designed and built scalable web scraping systems using Scrapy and RabbitMQ, enabling distributed task management
and high-throughput data collection.
Created optimized MySQL/PostgreSQL database schemas for efficient storage and access of scraped data.
Developed RESTful APIs with FastAPI to deliver data to clients, implementing JWT-based authorization for secure
access.
Engineered custom anti-bot evasion techniques with Playwright and Camoufox to reliably extract data from dynamic and
protected web sources at scale.
Deployed and automated pipelines with Docker, AWS EC2, and GitLab CI/CD.

ADDITIONAL EXPERIENCE
PHP Developer — BestWebSoft (11/2020 - 10/2021) | Intern Python Developer — Light IT (06/2021 - 08/2021)

EDUCATION
“Zaporizhzhia Polytechnic” National University Master, Software Engineering | 09/2021 - 01/2023
Zaporizhzhia National University Bachelor, Foreign Philology (English) | 09/2017 - 06/2021