Сергій

Senior FullStack Engineer
Serhii Romankov Konotop, Ukraine | Remote

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Versatile Software Engineer with 17+ years of experience delivering highimpact solutions for the Western European market. Expert in
architecting and scaling web applications using Laravel and Vue.js, with a deep focus on complex ERP systems and business process
automation.
Extensive background in designing automated, semiautomated, and manual workflows within the Insurance, Logistics, and Energy sectors.
Highly adept at orchestrating missioncritical integrations across diverse domains, including Marketing Automation, Billing, and Logistics.
Expert in streamlining customer support ecosystems (e.g., via Zendesk/ZAF) and, most recently, enhancing business efficiency with AI/LLM
capabilities.

Technical Skills
Backend & Tools Data & Ecosystems System Design & Architecture

• PHP: Laravel 812, CakePHP, Zend • Data: MySQL, PostgreSQL, MongoDB, • Workflows: Distributed, Automated
• JS: Vue.js 2/3, Node.js, ES6+ Redis & Manual Logic; State Machines
• API: Webhooks, SDKs, Service APIs • Scalability: Sharding, DB Clusters, • Integrations: Webhooks, SDKs,
• Modern Tech: AI/LLM (OpenAI API), Performance tuning External & Internal Service APIs
Zendesk (ZAF) • Domains: ERP/CRM, InsurTech, • Reliability: Queue Systems, Fallbacks,
• Infrastructure: Docker, Linux, Git Logistics & Supply Chain, MarTech, Error Handling Strategies
• Testing: PHPUnit, TDD basics, Energy Trading, Real Estate • Methodologies: SOLID, Clean Code
Integration testing.

Key Professional Experience
CrunchIS | Lviv, Ukraine
Senior FullStack Engineer * Mar 2025 – Present PHP LARAVEL VUEJS AI & LLM ZAF DOCKER
Senior Backend Engineer * Sep 2021 – Mar 2025 API & INTEGRATIONS SAAS INTEGRATIONS

• Development & Migration: Building scalable ERP & Logistics systems using Laravel (812) and Vue.js (23); refactoring
legacy PHP/Ruby codebases.
• Workflow Design: Collaborating with clients to translate requirements into automated logic for InsurTech, MarTech, and
supply chain platforms.
• Integrations & AI: Orchestrating thirdparty APIs and implementing AI/LLM tools to enhance product logic and engineering
efficiency.
• System Extensions: Developing custom Zendesk (ZAF) applications to unify operational data with customer support
workflows.

Der PHP Programmierer (Quasda GmbH) | Essen, Germany (Remote) PHP CAKEPHP JAVASCRIPT
Software Engineer * Jun 2018 – Sep 2021 API & INTEGRATIONS

• ERP/CRM Development: Developed and supported a largescale Energy & HVAC management platform, focusing on
complex quote calculation and lead processing logic.
• Workflow Automation: Engineered a core Label System for process control, automating document generation, scheduling,
and multichannel notifications.
• Service Integration: Implemented and maintained integrations with thirdparty billing and brokerage services using
CakePHP and JS.
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Senior FullStack Engineer
Serhii Romankov
email: [відкрити контакти](див. вище в блоці «контактна інформація») | phone: [відкрити контакти](див. вище в блоці «контактна інформація»)

...
RealCore Consulting GmbH | Essen, Germany (Remote) PHP LARAVEL JAVASCRIPT CAKEPHP
Software Engineer * Feb 2015 – Jul 2018 SAAS INTEGRATIONS

• Energy Market Solutions: Developed and extended distributed ERP/CRM systems for the German energy trading market,
managing complex data flows and regulatory requirements.
• Workflow Orchestration: Engineered a custom Queue Management System supporting manual, automated, and semi
automated steps with complex conditions and fallbacks.
• Technical Implementation: Orchestrated widescale internal and external API integrations; managed the transition of legacy
CakePHP components to Laravel.
• Technical Advisory: Contributed to project management and requirements analysis, bridging the gap between business
needs and technical execution.

Earlier Professional Experience

Various Projects & Roles PHP ZF NODEJS JAVASCRIPT
Software Engineer * 2007 – 2017 CREATIVE & UI DESIGN

• FullStack & Backend Development: Built scalable web solutions using Node.js, Zend Framework, and PHP. Key projects
included a highload real estate aggregator with complex data parsing/deduplication, a social network for car enthusiasts (US
market) and major news portals.
• Infrastructure & Scalability: Gained handson experience with DB clusters (Percona), load balancing, and custom API
development for international markets (US, Ukraine).
• Freelance & Consulting: Delivered diverse client projects, focusing on bridging the gap between complex backend logic and
userfacing interfaces.
• Creative & UI Design: Acted as a hybrid Designer/Developer, responsible for graphic web design, UI/UX layouts, and high
quality crossbrowser markup.

JSC Ukrtelecom | Ukraine SYSTEM ADMINISTRATION IT INFRASTRUCTURE PERL
Senior Engineer / IT Manager * 1998 – 2007 PROJECT MANAGEMENT JAVASCRIPT DELPHI

• Systems Engineering: Managed regional intranet infrastructure and Data Center construction. Led the reorganization of
corporate networks while making first professional steps in web development (Perl, JS).

Education
National Aerospace University "Kharkiv Aviation Institute" | Kharkiv, Ukraine
M.S. in Computer Science * 1992 – 1998

Languages
English (C1 – Full Professional Proficiency), Ukrainian (Native), Russian (Native)

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