Viktor Shcherban-AI Engineer & Full-Stack Developer
Check rate
Experience
AI Engineer (Freelance)
Empion
Enterprise AI content categorization and AI-powered web research.
- Built multi-LLM evaluation framework with annotated data
- Iterated LLM error rates based on annotated datasets
- Implemented AI-powered web research pipeline Stack: LLM, evals, OpenRouter, Python, Node.js, TypeScript, React
AI Engineer (Freelance)
Dolittle AI
Multi-modal AI agents platform.
- Built RAG-enabled AI platform features for voice and text agents
- Implemented custom LLM evaluation frameworks and agentic workflows
- Integrated OpenAI Realtime API and AWS Nova Sonic 2 for voice AI Stack: LLM, RAG, LangChain, Python, Node.js, Supabase, OpenAI Realtime API, AWS Nova Sonic 2, TypeScript, React, AWS
AI Engineer (Freelance)
DocDolittle
AI voice phone receptionist for German doctors' practices.
- Built multi-modal voice/text agents for incoming call handling
- Implemented AI-generated reply suggestions and smart call categorization
- Integrated VoIP/FreeSWITCH with ElevenLabs voice synthesis Stack: RAG, LLM, MCP, LangChain, VoIP, FreeSWITCH, ElevenLabs Voice, Supabase, Node.js, React, TypeScript, AWS, Pinecone
AI Engineer (Freelance)
Alteos
AI solutions for the insurance industry.
- AI strategy consulting and enterprise AI workflow design
- Built agentic workflows and LLM-powered automation Stack: Vercel AI SDK, RAG, LLM, MCP, LangChain, Mastra, Langfuse, Node.js, TypeScript
AI Engineer (Freelance)
SuitePad
AI concierge platform for hotels — text & voice chatbot grounded in hotel-specific knowledge.
- Built RAG pipelines, MCP servers, personalized recommendations, and multi-vendor AI voice integrations
- Integrated OpenAI Realtime API and AWS Nova Sonic 2 for voice AI
- Built document ingestion and AI evaluation pipelines Stack: Vercel AI SDK, RAG, LangChain, LangSmith, OpenAI Realtime API, AWS Nova Sonic 2, Python, Ruby on Rails, AWS Bedrock, Azure OpenAI, Google Vertex AI, pgvector, MCP
GenAI Workshop Author & Trainer (Freelance)
Self-employed
Author and trainer of GenAI workshops for developers. Trained 80+ developers across 4 workshops.
- Topics: Claude Code, Codex CLI, Cursor Agent, JetBrains AI, TDD/spec-driven development
- Advanced prompting, context engineering, custom AI tools, best practices and anti-patterns
- AI-assisted coding with agents and IDEs
AI Engineer / Founder (Volunteer)
Ukraine Refugee Support
Telegram AI chatbot helping Ukrainian refugees navigate German bureaucracy.
- Built RAG-enabled bureaucracy assistant with document understanding
- Implemented image recognition for document processing
- Added web-search grounding for up-to-date information Stack: RAG, LLM, React, DynamoDB, Terraform, Serverless, TypeScript, Node.js, AWS, OpenAI
CTO & co-founder
TimberBase
- TimberBase.com is a global marketplace for the digital timber trade.
- Building an engineering team from scratch to 7 people.
- Building a timber trading platform vision together with stakeholders.
- Aligning the tech team with the company vision and setting up delivery processes according to ever-changing market requirements. Achieved predictable releases with trustable delivery estimations.
- Developing roles and levels requirements. Coaching team members to perform and grow.
- Building healthy engineering habits - agile, code review, git flow.
- Fostering best practices discussions. Raising the bar for clean architecture that reflects business needs.
- Tech Stack: TypeScript/JavaScript, React, Redux, NoCode/LowCode, AWS, Git, Postgres, Kotlin, CI/CD, Terraform.
CTO & co-founder
Uberblick
- Uberblick is an internal communication app for hotels.
- Building the startup from scratch. Starting with 2 co-founders and a PowerPoint presentation Uberblick has grown into 15 people company in 2.5 years.
- Hiring and growing engineering. Retaining talents.
- Building and rolling out the first MVP (Web+iOS+Android) in 3 months (from zero to production).
- Setting up agile processes together with the team.
- Developing the product roadmap.
- Tech Stack: JS, Redux, React-Native, Expo, AWS(Elastic Beanstalk, S3, etc), Kotlin, JOOQ, WebSockets, Git, Postgres, Firebase.
Software Architect
Bonial International Group
- Joined Bonial as an iOS developer and eventually led a team of iOS, Android, and React Native developers as part of the company's startup incubator initiative.
- Designing systems and software architecture for a suit of company products (established and experimental).
- Fostering clean architecture patterns and coding best practices (CI, DDD, code conventions, etc).
- Interviewing developers.
- Tech Stack: Xcode, Swift, Git, React-Native, VIPER, Redux, AWS, Couchbase, TDD, DI, CI.
CTO & Founder
asdCode Mobile Development Agency
- Managing team of 4 developers (Asana, JIRA).
- Communication with customers, requirements, estimation, project management.
- Architecture, implementation, and testing.
- Tech Stack: Xcode, Objective-C, Cocoa Touch, Foundation, UIKit, MapKit, Git.
CTO & co-founder
iStat24 Call-Tracking
- Managing team of 4 developers.
- Giving ~20 presentations at industry conferences, from 20 to 400 people audiences over two years.
- Customer development, following lean startup principles.
- Team management, project strategy, architecture.
- Introducing Scrum to the team.
- Communicating with customers.
- Tech Stack: AWS, Perl, Ruby (RoR), MySQL/PostgreSQL, Redis, JIRA, Scrum.
CTO & co-founder
Vint.com.ua e-commerce store
- Singlehandedly created an e-commerce shop company from scratch.
- Developing website, back-office, internal ERP.
- Hiring and managing team (up to 10 employees).
- Online marketing, accounting, protecting from DDoS attacks, operations.
- Creating iOS and Android App.
- Tech Stack: Xcode, Objective-C, FreeBSD, Apache, Perl, MySQL, Html, CSS.
Full-stack Developer
LND Web Agency
- Developing websites, designing database structure, working closely with the sales department.
- Tech Stack: Perl, MySQL, Apache, JS, Html, Unix.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Retail, Tourism, Government and Administration, Agriculture, and Healthcare.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Operations, Marketing, Project Management, and Customer Service.
Summary
AI engineer and engineering leader with 19+ years of software experience and 3+ years shipping production GenAI systems. Former CTO at multiple startups — one acquired by UFP (NASDAQ).
Deep hands-on expertise in LLM/RAG/voice AI: I build RAG pipelines, agentic workflows, MCP servers, AI voice systems (OpenAI Realtime API, AWS Nova Sonic, ElevenLabs, FreeSWITCH/VoIP), and LLM evaluation frameworks. Recent projects include an AI hotel concierge (SuitePad), an AI voice receptionist for German doctors (DocDolittle), enterprise AI workflows for insurance (Alteos), and a Telegram chatbot helping Ukrainian refugees navigate German bureaucracy.
Full-stack capable across Node.js, TypeScript, Python, React, PostgreSQL, and AWS. I work end-to-end, fast, and at a senior level — independently or embedded in your team.
Currently available for freelance engagements in Berlin and remotely.
Skills
Ai / Genai: Rag Pipelines, Llm Apps, Mcp Servers, Agentic Workflows, Ai Voice Systems (Openai Realtime Api, Aws Nova Sonic, Elevenlabs, Freeswitch/Voip), Llm Evaluation Frameworks, Ai Strategy Consulting, Langchain, Langsmith, Langfuse, Mastra, Vercel Ai Sdk, Openrouter, Aws Bedrock, Azure Openai, Google Vertex Ai
Backend: Node.Js, Typescript, Python, Ruby On Rails, Java, Kotlin
Frontend: React, React Native, Tailwind Css
Databases: Postgresql, Supabase, Redis, Dynamodb, Firebase, Pgvector, Pinecone
Cloud & Infra: Aws (Fargate, Bedrock), Docker, Terraform, Vercel, Serverless
Monitoring & Observability: Datadog, Sentry, Langfuse
Engineering Leadership: Fractional Cto, Team Setup & Hiring, Architecture Decisions, Code Review Culture, Agile Processes
Languages
Education
Kyiv Polytechnic Institute
Master of Science (MS) · Computer Science · Kyiv, Ukraine
MS in Computer Science. Focused on software engineering, algorithms, and system design.
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Viktor is based in Berlin, Germany.
Viktor speaks the following languages: Ukrainian (Native), English (Advanced), German (Intermediate).
Viktor has at least 21 years of experience. During this time, Viktor has worked in at least 7 different roles and for 14 different companies. The average length of individual experience is 2 years and 6 months. Note that Viktor may not have shared all experience and actually has more experience.
Based on recent experience, Viktor would be well-suited for roles such as: AI Engineer (Freelance), GenAI Workshop Author & Trainer (Freelance), AI Engineer / Founder (Volunteer).
Viktor's most recent position is AI Engineer (Freelance) at Empion.
In recent years, Viktor has worked for Empion, Dolittle AI, DocDolittle, Alteos, and SuitePad.
Viktor is most experienced in industries like Information Technology, Retail, and Tourism. Viktor also has some experience in Agriculture, Government and Administration, and Healthcare.
Viktor is most experienced in business areas like Information Technology, Product Development, and Operations. Viktor also has some experience in Marketing, Project Management, and Customer Service.
Viktor has recently worked in industries like Information Technology, Agriculture, and Government and Administration.
Viktor has recently worked in business areas like Product Development, Information Technology, and Operations.
Viktor holds a Master in Computer Science from Kyiv Polytechnic Institute.
Viktor is immediately available full-time for suitable projects.
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The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 25 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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