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Senior Full Stack / AI Engineer with ~10 years of experience building scalable SaaS platforms, AI-powered systems, cloud-native applications, and high-performance web products. I specialize in React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and distributed architectures. Over the last few years, I’ve also been heavily focused on AI-assisted development workflows, LLM integrations, RAG systems, automation pipelines, and agentic AI applications. I enjoy taking products from idea to production — designing architecture, building scalable backends, crafting clean frontend experiences, and solving complex technical problems with a strong product mindset. Worked across startups, SaaS, AI, e-commerce, fintech, and operational platforms. Comfortable owning features end-to-end, collaborating directly with clients and product teams, and moving fast without sacrificing quality. I also run gudzi.studio — a product and AI-focused development studio building modern web, mobile, and AI-powered experiences.…Senior Full Stack / AI Engineer with ~10 years of experience building scalable SaaS platforms, AI-powered systems, cloud-native applications, and high-performance web products. I specialize in React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and distributed architectures. Over the last few years, I’ve also been heavily focused on AI-assisted development workflows, LLM integrations, RAG systems, automation pipelines, and agentic AI applications. I enjoy taking products from idea to production — designing architecture, building scalable backends, crafting clean frontend experiences, and solving complex technical problems with a strong product mindset. Worked across startups, SaaS, AI, e-commerce, fintech, and operational platforms. Comfortable owning features end-to-end, collaborating directly with clients and product teams, and moving fast without sacrificing quality. I also run gudzi.studio — a product and AI-focused development studio building modern web, mobile, and AI-powered experiences.

Sergey Hudzenko

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Senior Full Stack / AI Engineer with ~10 years of experience building scalable SaaS platforms, AI-powered systems, cloud-native applications, and high-performance web products. I specialize in React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and distributed architectures. Over the last few years, I’ve also been heavily focused on AI-assisted development workflows, LLM integrations, RAG systems, automation pipelines, and agentic AI applications. I enjoy taking products from idea to production — designing architecture, building scalable backends, crafting clean frontend experiences, and solving complex technical problems with a strong product mindset. Worked across startups, SaaS, AI, e-commerce, fintech, and operational platforms. Comfortable owning features end-to-end, collaborating directly with clients and product teams, and moving fast without sacrificing quality. I also run gudzi.studio — a product and AI-focused development studio building modern web, mobile, and AI-powered experiences.…Senior Full Stack / AI Engineer with ~10 years of experience building scalable SaaS platforms, AI-powered systems, cloud-native applications, and high-performance web products. I specialize in React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and distributed architectures. Over the last few years, I’ve also been heavily focused on AI-assisted development workflows, LLM integrations, RAG systems, automation pipelines, and agentic AI applications. I enjoy taking products from idea to production — designing architecture, building scalable backends, crafting clean frontend experiences, and solving complex technical problems with a strong product mindset. Worked across startups, SaaS, AI, e-commerce, fintech, and operational platforms. Comfortable owning features end-to-end, collaborating directly with clients and product teams, and moving fast without sacrificing quality. I also run gudzi.studio — a product and AI-focused development studio building modern web, mobile, and AI-powered experiences.

Available to hire

Senior Full Stack / AI Engineer with ~10 years of experience building scalable SaaS platforms, AI-powered systems, cloud-native applications, and high-performance web products.

I specialize in React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, AWS, and distributed architectures. Over the last few years, I’ve also been heavily focused on AI-assisted development workflows, LLM integrations, RAG systems, automation pipelines, and agentic AI applications.

I enjoy taking products from idea to production — designing architecture, building scalable backends, crafting clean frontend experiences, and solving complex technical problems with a strong product mindset.

Worked across startups, SaaS, AI, e-commerce, fintech, and operational platforms. Comfortable owning features end-to-end, collaborating directly with clients and product teams, and moving fast without sacrificing quality.

I also run gudzi.studio — a product and AI-focused development studio building modern web, mobile, and AI-powered experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Ukrainian

Fluent

Russian

Advanced

French

Beginner

Work Experience

Senior Software Engineer at Coinsflow

January 1, 2022 - Present

Blockchain-based cross-border payments platform. Built and launched the platform from scratch to production; designed scalable backend services using Go and Node.js; led frontend ownership (Vue/React/Next.js); contributed to system architecture; designed and deployed Solidity smart contracts for on-chain state management.

Senior Software Engineer at IQAir

January 1, 2024 - Present

Air quality technology company. Led migration from Drupal to Shopify; built modern frontend with Angular; developed backend services in C# to support increased traffic and data processing; implemented advanced Shopify features to enhance conversion and sales performance.

Senior Software Engineer at Orderin

January 1, 2020 - January 1, 2022

B2B platform providing infrastructure for delivery applications, including order processing, routing, and real-time logistics operations. Led migration to microservices architecture, developed map and routing engine, and built real-time data processing pipelines using Apache Spark and Hadoop; contributed to backend architecture and DevOps across distributed services.

Senior Software Engineer at MUH

January 1, 2018 - January 1, 2020

B2B solution for maintaining employees on large projects; renovated the design of an existing project; updated backend functionality and rewrote from PHP to Node.js; improved app performance by more than two times; provided innovative solutions for worker activity tracking.

Founder at SyntHire

January 1, 2025 - Present

AI-powered recruitment and screening platform designed to automate large parts of the hiring workflow using LLMs, multi-step reasoning, and adaptive assessment flows. Focused on structured interviews, evaluating candidates, generating technical tests, and providing decision support and hiring recommendations.

Founder at Gudzi.Studio

January 1, 2026 - Present

Studio focused on building intelligent web and mobile products, including custom SaaS, business platforms, and e-commerce solutions. Product ownership, technical leadership, and hands-on development to turn ideas into production-ready software.