Іван

Ivan Kulyk
Software Engineer · Backend & Cloud · Java / Kotlin · Microservices · Big Data

SUMMARY
7+ years building backend systems, data pipelines, and cloud-native microservices. Worked across fintech, crypto trading,
big-data catalog platforms, and enterprise security products for clients in the US, UK, Sweden, and internationally. Led
teams, drove cloud migrations, and designed high-load distributed architectures. MSc Computer Engineering, Dnipro
National University.

TECHNICAL SKILLS
Languages Java, Kotlin, Go, Python, Bash, SQL
Frameworks Spring, Spring Boot, Micronaut, Javalin, Dropwizard, Quarkus, Hibernate, EclipseLink
Big Data / Search Apache Iceberg, Databricks (JDBC & Unity Catalog), Hadoop (HDFS, MapReduce, YARN,
HBase, Hive, Zookeeper), Apache Spark, OpenSearch, Kafka
Databases PostgreSQL, MongoDB, MySQL, Redis
Cloud & DevOps AWS (IAM, S3, EC2, SNS, ECS, Athena), Azure, Docker, Kubernetes, Jenkins, CI/CD
Blockchain Corda, Safeheron, DFNS, FractalID, Beyond Identity
Testing JUnit, TestNG, JMeter (load testing), Cucumber, Mockito

EXPERIENCE

GlobalLogic — Senior Backend Engineer Oct 2025 – Present
Client: USA / International (global SaaS product)
Enterprise data catalog platform for a global provider of data integration and analytics solutions. The system automates
ingestion of metadata and data lineage from heterogeneous big-data sources, serving enterprise clients worldwide. Domain:
big data governance, data observability.
- Built connectors for Databricks (JDBC & Unity Catalog) and Apache Iceberg — enabling large-scale metadata ingestion
from petabyte-level data lakes
- Configured security layer: JWT authentication via Keycloak, fine-grained RBAC authorization
- R&D: evaluated PostgreSQL as a replacement for MongoDB for improved query performance under high load
- Unit & integration testing; maintained technical documentation
Stack: Java, Kotlin, Spring Boot, Quarkus, MongoDB, PostgreSQL, OpenSearch, Docker, Kubernetes, AWS, Databricks, Apache Iceberg,
Hadoop

Otakoyi — Backend Engineer Jan 2024 – Oct 2025
Client: USA (internal platform for a major US-based tech company)
Internal content management platform supporting rich content manipulation, AI-powered PDF generation, and template-
based document construction. Handles high traffic from internal users globally. Domain: content tooling, document
generation.
- Led full backend development; decomposed monolithic service into microservices for improved scalability and
independent deployability
- Planned and executed zero-downtime cloud migration from DigitalOcean/Linode to Azure
- Refactored and implemented ETL/ELT pipelines
- R&D on resource usage minimization and third-party system integration patterns
Stack: Kotlin, Spring, Javalin, Puppeteer, PostgreSQL, Apache Spark, Docker, Azure

Quantumobile — Backend Engineer Sep 2022 – Jan 2024
Client: USA (startup, distributed team)
Institutional-grade crypto trading and investment platform built on Corda (permissioned blockchain). Provided deal-making,
wallet management, and compliance workflows for a closed circle of investors, advisers, and traders. Domain: DeFi, fintech,
blockchain.
- Integrated OAuth 2.0 identity providers: FractalID (KYC/compliance) and Beyond Identity (passwordless auth)
- Built integrations with institutional crypto wallet providers Safeheron and DFNS for secure multi-party asset
management
 - Go service development; R&D on Safeheron API Co-Signer infrastructure setup
Stack: Kotlin, Spring Boot, Corda, Go, PostgreSQL, Redis, Docker, Jenkins, AWS

Oracle — Software Engineer Sep 2021 – Oct 2022
Client: USA (Oracle Cloud Infrastructure)
Cloud platform consisting of distributed high-load microservices: search, token generation, logging, notification, metadata
management, metrics, and SaaS orchestration — designed for millions of concurrent cloud users. Domain: cloud
infrastructure, SaaS platform.
- Implemented core search service within a distributed cloud microservices cluster
- Conducted unit, integration, system, and load testing (JMeter) for high-concurrency production readiness
- Instrumented observability: structured logging and metrics collection
Stack: Java, Spring, Micronaut, Hibernate, OpenSearch, Kubernetes, Docker, Log4J, JUnit, JMeter

GlobalLogic — Software Engineer Apr 2021 – Sep 2021
Client: USA / International (enterprise SaaS, 92 countries)
Enterprise SaaS platform for complex business calculations used by thousands of companies across 92 countries. Focused on
reliability, auditability, and correctness at scale. Domain: enterprise business software.
- Backend feature development for high-volume calculation workflows; unit testing; documentation
Stack: Java, Spring, Servlets, Hibernate, Kubernetes, Docker, JSP

Anadea — Software Engineer Sep 2020 – Apr 2021
Client: Sweden (news portal for Swedish market)
High-traffic digital news portal for the Swedish market, inspired by The New York Times editorial model. Backend serves a
large daily readership with high availability requirements. Domain: media, publishing.
- Integrated with Google Analytics
- Developed backend REST APIs and data access layers; unit & integration testing
Stack: Kotlin, Spring Boot, Hibernate, AWS, Docker, Angular

SoftServe — Software Engineer Jan 2020 – Aug 2020
Client: USA (enterprise cybersecurity product)
Enterprise-wide network security platform providing real-time visibility and threat detection. Identifies C&C attacks,
ransomware, DDoS, illicit crypto mining, unknown malware, and insider threats by processing high volumes of network
traffic. Domain: cybersecurity, big data analytics.
- Developed backend components for real-time high-volume network event processing and threat classification
- Unit & integration testing for security-critical services; technical documentation
Stack: Java, Spring, Python, Apache Spark, Bash, Docker, React

SoftServe — Junior Software Engineer May 2019 – Jan 2020
Client: USA — Austin, Texas (digital marketing SaaS)
Digital marketing SaaS platform allowing retail brands to collect, display, and moderate user-generated content — reviews,
ratings, videos — across thousands of partner e-commerce sites. Domain: e-commerce, content management.
- Backend feature development for high-volume UGC ingestion and display; unit testing (JUnit, TestNG)
Stack: Java, Dropwizard, Hibernate, AWS, MySQL, MongoDB, Angular

EDUCATION
Degree MSc Computer Engineering — Dnipro National University by Oles Honchar
Period Sep 2017 – Dec 2018