Андрій Veteran

ANDRII PUHACHENKO
Ukraine · [open contact info](look above in the "contact info" section) · tg: @andrqxa_p · [open contact info](look above in the "contact info" section)

SUMMARY OF QUALIFICATIONS
Backend Engineer with 10+ years of experience across enterprise platforms, geodata systems,
workflow automation, and financial applications.
Specializes in Golang and Java, distributed systems, cloud-native architectures, and scalable
backend development.
Strong background in Go tooling, CI/CD automation, event-driven processing, and large-scale
data validation.
Experienced with SQL/NoSQL databases (Oracle, PostgreSQL, DB2, MongoDB, Google
Spanner), AWS services (Lambda, S3, SQS), GCP and Kubernetes-based environments.
Go used for backend utilities, data pipelines, internal components and modernisation tasks.
Worked with Kafka conceptually and in integration tasks (consumer patterns, retries, event
propagation). Eager to deepen production expertise.
Experienced in building payment-related, high-throughput and low-latency backend components for
enterprise and financial platforms. Recognized for analytical thinking, fast learning, system-level
understanding, and a pragmatic engineering approach.

PROFESSIONAL SKILLS
• Languages: Go (Golang), Java, SQL, Bash, Python.
• Backend: REST, gRPC, Microservices, Clean Architecture.
• Go ecosystem: goroutines, sync, generics, sqlx, testing.
• Cloud & Infra: Docker, Kubernetes, AWS, GCP.
• Data: Spanner, PostgreSQL, MySQL, MariaDB, Oracle, MongoDB, DB2.
• Messaging: Apache Kafka.
• DevOps: GitLab CI/CD, Jenkins.
• Monitoring: Prometheus, Grafana.
• Other: Git, TDD, Distributed Systems, data validation pipelines.

PROFESSIONAL EXPERIENCE

Backend Engineer (Go) Janury 2026 –
Empat
Project: Cloud-native platform for sending advertising email, messages and so on.
Responsibilities:
• Built backend components using Go, gRPC, GCP, Google Spanner, Pub/Sub, BigTable,
BigQuery.

Backend Engineer (Java | Serverless Integrations) March 2025 – July 2025
Intellias
Project: Cloud-native platform for synchronizing tasks, comments, and workflow events between
corporate systems.
Responsibilities:
• Built backend components using Java 21, Micronaut, AWS Lambda, SQS, S3 for a fully
serverless integration pipeline.
• Implemented event workflows ensuring consistency and idempotency across services.
• Developed HTML → ADF transformation logic and content-processing modules.
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• Improved observability with structured logging and performance metrics.
• Automated CI/CD via GitLab CI, AWS CLI, IaC.
• Refined integration contracts with engineering, QA, and product teams.
Impact:
Delivered a serverless pipeline replacing a legacy tool, cutting monthly operational costs by ~40% and
improving processing latency by ~25%.

Backend Engineer (Java | Go | DevOps) June 2024 – March 2025
Intellias
Project: Internal developer tooling and automation for Kubernetes-based environments.
Responsibilities:
• Maintained deployment automation tools and CI/CD pipelines (Jenkins, GitLab CI).
• Developed and refactored Java backend components to improve system reliability.
• Integrated Go modules into existing toolchains; reviewed Go CLI tooling.
• Unified Kubernetes deployment scripts and improved provisioning workflows.
• Enhanced observability with better logging, tracing, and metrics.
Impact:
Reduced operational friction and increased reliability of developer tooling across multiple engineering
teams.

Database Migration Consultant (Go | Oracle | PL/SQL | Bash) February 2021 – January 2022
TietoEvry
Project:
Migration of a legacy DB2-based banking system to Oracle 12c.
Responsibilities:
• Designed and implemented full data-migration pipeline as the sole developer.
• Rewrote slow Bash tooling into Go, improving speed and reliability.
• Automated export, transformation, validation, import flows for structured banking data.
• Developed PL/SQL scripts for schema migration and integrity checks.
• Ensured schema compatibility and correctness through automated validation.
Impact:
Delivered a stable migration platform with greatly reduced execution time and minimal manual effort.

Backend Engineer (Java | Go | Data Tooling) June 2018 – May 2024
Intellias
Project:
Geodata processing platform for mapping, routing, and automotive navigation (datasets 60GB+ per
region).
Responsibilities:
• Developed Java + Vaadin backend components for data workflows and validation features.
• Integrated Kafka to streamline event propagation and data-processing triggers.
• Built Go tools replacing Python scripts for detecting schema mismatches and corrupt data.
• Implemented Go utilities for exporting, validating, and transforming datasets into SQLite.
• Participated in modernization initiative (Java → Go, Vaadin → Vue.js).
• Synced data structures with C++ binary-generation components.
Impact
Significantly reduced manual QA work and improved data consistency via Go-based validation and
modernization tools.
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Java Developer November 2017 – May 2018
EPAM Systems, Inc.
Project: A backend modernization project for a large financial institution.
Responsibilities:
• Developed backend components for transaction processing and internal service logic.
• Refactored modules to reduce technical debt and align with updated workflows.
• Implemented validation and error-handling rules for financial operations.
• Participated in performance tuning and load testing.
Impact:
Improved reliability and performance of critical banking modules.

Java Developer | Reporting Engineer July 2015 – October 2017
MERA Software Services, Inc.
Project: A reporting and analytics platform for a telecommunications provider.
Responsibilities:
• Developed reporting modules using Java and JasperReports.
• Implemented SQL-based data extraction and validation processes.
• Migrated datasets from MySQL to MariaDB.
• Optimized long-running reports through query tuning and indexing.
• Automated parts of report-generation workflows.
Impact: Reduced report-generation time and improved overall stability of telecom reporting pipelines.

EDUCATION

Specialist Degree (equivalent To Master’s) 2004
Department Of Automation And Control Systems, “Sevastopol National Technical University” (former),
Ukraine

CERTIFICATES

Udemy 2025
“Introduction to AI and Machine Learning with Go (Golang)” - in progress
Udemy 2025
“Practical introduction to Observability”
Udemy 2023
“Working With Concurrency In Go (Golang)”
Udemy 2023
“Docker & Kubernetes: The Complete Practical Guide”
Udemy 2024
“DevOps, CI/CD (Continuous Integration & Delivery) For Beginners”
Udemy 2022
“Go: The Complete Developers Guide”