Freelancer profile translated to English.
Back to original languageAbout Serhii
I help B2B companies, startups, and SaaS innovators transform complex business requirements into intelligent, scalable, and high-performing products.
I have extensive experience in designing and architecting AI-powered full-stack systems. I utilize Python and NestJS (Node.js) for robust backend services, and React.js, Next.js, and TypeScript for scalable, workflow-oriented frontend applications. My expertise lies in developing complex system architectures, integrating RAG-based search functionalities, custom AI skill agents, and orchestrating AI workflows to automate business-critical processes.
💡 What I excel at:
Full-Stack Architecture & AI Product Strategy
AI Integration | Custom AI Skill Agents | RAG-based Search Functionality
Vector Database Architecture & LLM Integration for Querying Proprietary Enterprise Data
Prompt Engineering, Evaluation of AI-generated Responses & AI-driven Feature Implementation
Performance Optimization, SEO Strategies & Core Web Vitals Improvement
Data-Intensive UI & UX Development with Centralized Design Systems
Agile Interface Communication between Business Stakeholders and Cross-functional Teams
🔹 Experienced Full-Stack Developer:
Full-Stack Development with TypeScript, Next.js, React.js, Python, and Node.js (Express, NestJS)
Advanced State Management & Caching: Zustand, React Query, Redux Toolkit
Scalable Enterprise Architectures & Monorepo Setups
Infrastructure & APIs: Event-Driven Architecture, REST, GraphQL, CI/CD (GitHub Actions) & Docker
Database Expertise: PostgreSQL, Prisma, Redis, and Cloud Ecosystems (AWS S3)
Keywords: Senior Full-Stack Engineer, AI-Native Developer, Software Architect, Frontend Lead, Next.js Expert, React, TypeScript, SaaS Architect, RAG Pipeline Developer, AI Agent Integration, Python Backend, B2B Software Architect, Tailwind CSS, Zustand, PostgreSQL, Prompt Engineering
English
Native or bilingual
German
Fluent
Ukrainian
Native or bilingual
Russian
Fluent
Can work on-site
Altena (up to 50km)
Experience
- TailBookTeam Lead Frontend DeveloperNovember 2024 - Today (1 year and 9 months)Managed a team of 10 developers, streamlining collaboration through effective task decomposition, goal setting and mentoring. Successfully prepared the platform for the Web Summit in Lisbon, meeting tight deadlines and improving the product for presentation. Provided guidance and support to ensure timely delivery and high quality code. Use React and modern frameworks to efficiently tackle complex UI challenges. Passionate about applying our expertise in a dynamic and creative environment.
- Upwork | FreelancehuntFull-Stack DeveloperFebruary 2022 - November 2024 (2 years and 9 months)Developed 20+ responsive websites and applications using React and Next.js, increasing client visibility by up to 15% and boosting revenue by 10%. Explore my work at https://mcarrow.vercel.app.Performed performance optimisation, SEO improvements and code refactoring, resulting in improved scalability and user experience according to customer feedback.
- Arial consulting groupIT ConsultantJanuary 2019 - February 2022 (3 years and 1 month)Provided tailored web solutions and consultancy for clients across various industries, utilizing tools such as WordPress, Contentful, and other modern CMS platforms to deliver customized, efficient results.
Recommendations
Be the first to recommend Serhii
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master of ScienceNational University2013Master of Science,
Certifications
- Next JS & Open AI / GPT: Next-generation Next JS & AI appsUdemy2023
