Serhii Duka - CV SENIOR PYTHON ENGINEER

Verme LLC 04.2020 –11.2025 Senior Backend Engineer Core contributor to the company’s flagship workforce management platform and development of tailored client solutions. • Designed and implemented a universal JSON-based filtering and visualization engine that automatically generates filters, supports dynamic admin rendering of arbitrary objects, and provides standardized responses reusable across all modules. • Architected and built a powerful extension framework with a module composer, allowing safe, isolated client customizations without modifying the core codebase. • Led the complete redesign and development of the next major version of the core application, including enhanced API layer and numerous client-oriented extension points. • Conducted in-depth performance analysis of critical user-facing features, identifying and eliminating major bottlenecks and delivering optimizations of several orders of magnitude. • Engineered reusable internal interfaces, model managers, and querysets that established consistent high-level development patterns and significantly reduced technical debt. • Developed dozens of complex background tasks and platform enhancements that accelerated delivery of client-specific functionality while maintaining high reliability and regulatory compliance. Fashion Port LLC 06.2019 – 02.2020 Senior Python Developer Enhancement and support of a high-traffic B2B e-commerce platform and supplier portal. • Designed and implemented a secure payment system integration that enabled seamless transaction processing. • Built a supplier notification system that improved operational coordination and reduced manual communication. • Delivered multiple feature enhancements and stability improvements that supported continued platform growth and client satisfaction. Applied Algorithms LLC 03.2017 – 06.2019 Software Engineer Development and support of internal product services for data processing, marketing automation, and telecommunications. • Designed and launched a new internet-resource data collection and analysis service that became a key internal tool. • Built and maintained large-scale services for data collection, analysis, and visualization. • Developed full automation services for SEO promotion and contextual advertising campaigns. • Created a service for processing and automation of telecommunications system data, streamlining critical business processes. Inscom Solutions LLC 11.2015 – 02.2017 Senior Python Developer Expansion of the core API and integration with multiple transportation providers. • Significantly extended the existing REST API with new capabilities and improved reliability. • Designed and implemented robust integrations with several major transportation companies, expanding service coverage and data exchange quality. • Delivered consistent improvements to system stability and integration layer performance. Technical Software Solutions LLC 03.2011 – 10.2013 Backend Developer & Project Lead Development of a web platform in the telecommunications sector and an ERP system for remote terminal request management. • Designed and implemented backend components for the main telecommunications web application. • Built a complete ERP system for tracking and processing requests from remote terminals, providing structured and reliable data handling. • Owned technical decisions throughout the full development lifecycle of both systems.

2004 Kirovograd National Technical University, Kirovograd, Computer Engineering and Automated Software Systems 1999 Kirovograd Cybernetics and Technical College, System Programming(Engineer)

Python, Django, DRF, Celery, PostgreSQL, Linux, REST API, pytest, Git, Airflow, Redis, Docker, Kubernetes, SQL, NoSQL, Sentry, Kanban, AI, RAG, SOLID/DRY/KISS

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Experienced Senior Python Developer with a solid background in designing and maintaining reliable backend systems for product companies. I specialize in Python and Django, building extensible, well-maintainable platforms that deliver real business value. I take responsibility for architectural decisions, lead meaningful product improvements, reduce technical debt step by step, and guide solutions from initial idea to stable production use.