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OTAKOYI

Vitalii S. logo

Vitalii S.

Available now

Back-End Developer, Tech Lead @ OTAKOYI

Senior
Seniority
GMT+02:00, Lviv, Ukraine
Location & Timezone
$55 - $60/hr
Average Hourly Rate
Ukrainian, English
Languages

Top skills

Symfony
Laravel
Python
Node.js
PHP

About

Backend Tech Lead with 10+ years of experience designing scalable architectures and delivering innovative solutions. Strong expertise in optimizing complex systems and integrating advanced technologies to meet business goals. Key projects include a multifunctional user platform, an AI-driven price recommendation engine, and an AI-powered content generation system. Recognized for strong problem-solving skills, technical leadership, and enthusiasm.

Top skills

Verified by Pangea.ai due diligence

Top SkillsCurrent UsageSeniority
Symfony
25%7 years
Laravel
25%7 years
Python
15%5 years
Node.js
10%4 years
PHP
25%7 years

All skills

Roles and tools, to bring ideas to life and create meaningful experiences

AI & ML Solutions
SaaS
Marketplaces
CMS

Professional experience

Explore a curated selection of projects highlighting Vitalii S.'s expertise and experience. Each project aims to showcase challenges, solutions, and the final outcome, along with the tools and technologies used.

Under MNDA
AI SCIENTIFIC CONTENT GENERATOR — Senior Back End Engineer
An AI-powered system that uses published scientific articles and other written documents to answer questions and write long and short content, including tables and diagrams. Responsibilities: Developed and optimized REST APIs, enabling seamless communication between the back-end, front-end, and AI components Designed and maintained scalable data storage solutions using MongoDB and MinIO for structured and unstructured data Collaborated with the AI engineer to integrate machine learning models for document analysis and content generation Ensured system performance, scalability, and reliability through efficient back-end workflows and code optimization
Laravel
Python
MongoDB
LangChain
HealthTech
+9
Under MNDA
Multi-sale channels shop — BackEnd Tech Lead
Multi-sale channels shop, built with Shopware 6, reactive frontend and mobile app. with different custom plugins (SEO features, checkout-payment). Responsibilities: Developed custom plugins to enhance the functionality of the e-commerce platform Collaborated with the team to ensure seamless integration of custom plugins with existing systems Conducted code reviews and provided technical mentorship to team members Achievements: Successfully implemented SEO features, enhancing the visibility and ranking of the e-commerce platform in search engine results Streamlined the checkout and payment process, resulting in improved user experience and increased conversion rates
Symfony
Shopware
E-Commerce
Backend Development
Web Development
+8
Under MNDA
CUSTOMER SOLUTION STUDIO — Senior BackEnd Enginer
Industry: Technology & Hardware A management platform that allows partners and sellers to create, send, and track marketing content via email for end-to-end users. The system maintains a global database of devices, accessories, and services. The system is integrated with AI tools allowing to generate marketing content easily. Responsibilities: Set up deployment environment and making deployments of the back-end application components Created a preliminary version of the application to demonstrate its feasibility and potential Vectorized data obtained via API for storage in a NoSQL database, enhancing data retrieval efficiency Collaborated with front-end and AI developers Client’s Appraisal: Client considered Vitalii as a skilled tech developer, able not only to write a code, but to lead a dev team
Python
Information Technology
AdTech & MarTech
Backend Development
API Development & Integration
+6

Preferred tools

View the preferred tools and apps used by Vitalii S. to assess compatibility and alignment.

Git
Git
Github
Github
Gitlab
Gitlab
Confluence
Confluence
Jira
Jira
Figma
Figma
Bitbucket
Bitbucket
G Suite
G Suite
Microsoft
Microsoft
Slack
Slack
Trello
Trello

Career highlights

Discover Vitalii S.’s professional journey, including employment history, certifications, and educational background.

Back-End Developer, Tech Lead
OTAKOYI⸺2016 - pressent
Backend Engineer / Tech Lead at OTAKOYI focusing on PHP, Symfony, and Laravel. Designs scalable, high-load architectures for SaaS and enterprise platforms, aligning technology with business goals. Combines hands-on coding with architectural leadership, ensuring clean, maintainable systems, strong performance, and seamless integrations across cloud and AI

Testimonials

Bohdan K, Senior PHP Developer @ OTAKOYI

OTAKOYI

Verified Testimonial

“I’ve had the privilege of working with Vitalii for the past three years, and it’s been an incredible experience growing under his leadership. Vitalii is the kind of Tech Lead who combines deep technical expertise with calm, structured guidance. His knowledge of PHP, Symfony, and Laravel is truly impressive, but what makes him stand out is how he translates complex architectural decisions into clear direction for the team. He always sees the bigger picture and thinking about scalability, performance, and long-term maintainability from day one. At the same time, he’s approachable, supportive, and genuinely invested in helping others grow. Code reviews with him are never just corrections, they’re learning opportunities. Beyond his technical strength, Vitalii leads with integrity and confidence. In high-pressure situations, he stays focused and solution-oriented, creating stability for the whole team. Any company would be lucky to have a leader like him driving their backend and architecture forward.“

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