Oleksii

OLEKSII HAIOVYI SUMMARY

Software Engineer Senior Backend Software Engineer with 5+ years of experience building
backend systems with Java and Spring Boot, with additional experience
in Python. Experienced in developing REST and GraphQL APIs, designing
database schemas, integrating AWS services, and building
independently scalable backend services. Hands-on experience with
PostgreSQL, Redis, Cassandra, Kubernetes, Docker, Terraform, and
observability tools.

PROFESSIONAL EXPERIENCE
AgriTech Consulting Company
Software Engineer
2026 – Present
[відкрити контакти](див. вище в блоці «контактна інформація»)
Description: Enterprise platform for collecting, validating, processing,
[відкрити контакти](див. вище в блоці «контактна інформація») and analyzing agricultural data from customers to support
benchmarking, reporting, and business analytics.
Ukraine, Kyiv
Responsibilities:
Github
Developed backend services using Java and Spring Boot for
•

Telegram processing and analyzing customer data.
Implemented XLSX data import pipelines with validation and
LinkedIn
•

transformation before database persistence.
Designed data processing and validation logic to ensure data
•

SKILLS consistency and reliability.
Wrote unit and integration tests using JUnit.
Programming Languages:
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Java, Python, JavaScript Stack: Java, Spring Boot, Hibernate, PostgreSQL, Maven, JUnit
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Backend:
Java: Spring Boot, Hibernate, Liquibase Media Company
Python: FastAPI, SQLAlchemy, Alembic Software Engineer
2026 – Present
APIs:
Description:
REST, GraphQL
A content personalization platform for digital media publishers that
Testing: processes large volumes of articles, tracks user engagement and
JUnit, Mockito, PyTest, Integration Testing analyzes behavioral data to deliver personalized content
Databases & Caching: recommendations.
PostgreSQL, MySQL, Cassandra, Redis, Snowflake Responsibilities:
Cloud & DevOps: Contributed to decomposing a Java/Spring application into
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AWS (EC2, S3, Lambda, SQS, SNS), Google Cloud independently deployable services, enabling separate scaling and
Platform (GCP), Docker, Kubernetes, Terraform, deployment of high-load components.
Kafka Configured Grafana dashboards and InfluxDB data sources using
•

Terraform.
Monitoring & Observability: Integrated Apache Spark job metrics with Grafana for monitoring and
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Grafana, InfluxDB, Sentry, DataDog observability.
Data & Processing: Worked with Kubernetes-based deployments and infrastructure
•

Airflow, Spark configuration.

Search: Stack: Java, Python, PostgreSQL, Cassandra, Apache Spark, Kubernetes,
Elasticsearch / OpenSearch Terraform, Grafana, InfluxDB
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Tools:
Maven, Gradle, Git, Jira, Confluence Social platform
Software Engineer
Languages:
2025 – 2026 | remote
English - B2
Description: Social platform with mobile clients for managing and
sharing personalized content.
EDUCATION
Responsibilities:
Bachelor of Forestry and Landscape Architecture Developed backend services using Java 21 and Spring Boot for
•

Lugansk National Agrarian University content creation, retrieval, and filtering.
2010 – 2014

Implemented authentication and authorization with secure session
•

management.
Designed and optimized PostgreSQL schemas and queries for
•

backend performance.
Integrated external APIs and notification systems.
•

Worked with Redis and OpenSearch for caching and content search.
•

Stack: Java 21, Spring Boot, GraphQL, Hibernate, PostgreSQL, Redis,
OpenSearch, AWS
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Credit Platform
Software Engineer
2024 – 2025
Description: Platform for managing consumer credit applications and
financial data processing.
Responsibilities:
Built and maintained Airflow ETL pipelines for processing consumer
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credit data.
Processed and transformed financial data into structured datasets.
•

Integrated AWS S3 and Snowflake for scalable data storage and
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analytics.
Improved reliability and performance of scheduled data pipelines.
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Stack: Python, Airflow, MySQL, Snowflake, AWS S3
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E-commerce Integration Platform
Software Engineer
2022 – 2024
Backend platform for integrating Ukrainian sellers and sales platforms,
enabling automated product, inventory, and pricing synchronization.
Developed integrations with Ukrainian sellers and e-commerce
•

platforms for automated product, inventory, and pricing
synchronization.
Implemented AWS Lambda-based processing for high-volume
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product updates and data synchronization.
Designed MongoDB storage for product and tracking data.
•

Stack: Java, Spring Boot, Python, AWS Lambda, MongoDB, REST APIs
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Online Store "Hlorka"
Director
2016 – 2022 | Kyiv, Ukraine
•Scaled the team from 5 to 50+ employees and led technology-driven
process improvements.
•Integrated CRM, IP telephony, and 1C systems to automate business
operations and improve customer experience.
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