Сергій

Serhii Zdorenko
Software Engineer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) LinkedIn

Dnipro, Ukraine

PROFILE
Tech-agnostic Software Engineer with 4.5+ years of experience rescuing, scaling, and modernizing mission-
critical FinTech systems. Operates fully autonomously to diagnose architectural defects, optimize high-load
performance, and integrate modern cloud services. Adept at leveraging GenAI tools (LLMs, Copilot) to
navigate complex, undocumented legacy codebases and deliver reliable production support.

EMPLOYMENT HISTORY
08/2021 – Present EPAM Systems
Software Engineer
Project: Working on a project for a leading global financial infrastructure provider.
Key Responsibilities & Achievements:
Scalability & Modernization: Prevented a major system rewrite by designing a
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scalable caching architecture using AWS ElastiCache (Redis). Configured the
cluster to efficiently process 50M+ keys (~20GB data), significantly extending the
legacy application's lifecycle.
Autonomous Technical Leadership: Operated fully independently without senior
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oversight, taking end-to-end ownership of architecture and development for
critical tasks. Consistently delivered complex solutions across diverse tech stacks,
overcoming significant documentation gaps.
Cross-Stack Troubleshooting & Maintenance: Specialized in resolving
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undocumented, deep-seated defects across a broad technology landscape (Java,
Scala, Python). Ensured system stability by rapidly navigating unfamiliar
codebases and performing regular performance tuning for core services.
Performance Optimization: Analyzed and refactored legacy code to improve
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execution speed and resource efficiency, enabling the platform to handle
increasing data volumes.
•AI-Driven Development: Integrated LLMs and GitHub Copilot into daily
workflows to boost engineering productivity. Utilized prompt engineering for
root-cause analysis of legacy system issues, generating utility tools, and writing
code, which decreased time-to-resolution for complex bugs

11/2013 – 08/2021 Allo, Dnipro
Analyst
Reports for department heads and top managers of the company.
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Analysis and forecasting of sales.
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Preparation of technical assignment for improvements in ERP and BI, control of
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implementation.
Supporting the budgeting process.
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Serhii Zdorenko
 SKILLS
Core Cloud & Infrastructure Frameworks
Java
• AWS
• •Spring
Scala
• Docker
• •Akka
OOP
• Kubernetes
• •Play
Microservices
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AI
CI/CD & Tools Databases •Prompt Engineering
•Git Elasticsearch
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•AI Agents workflows
•Jenkins Redis
•
•GitHub Copilot
•GitLab CI Couchbase
•

•Maven
•SBT

LANGUAGES
English Ukrainian
B2 Native

Certificates
AWS Certified Developer⁠ Microsoft Certified⁠
Associate Azure Fundamentals

EDUCATION
Bachelor’s degree in Mechanical Engineering
Ukrainian State Chemical Technology University, Dnipro

Serhii Zdorenko