Available for backend / AI engineering roles

Viktor Urbanas

Senior / Lead Backend AI Engineer

Backend/AI Engineer building production LLM and RAG systems for real products at scale.

Hire for Backend/AI Role View Experience

What I Build

AI Applications

Production-ready LLM features, smart assistants, and retrieval systems with embeddings, vector databases, and hybrid search.

Scalable Backends

High-performance backend services, robust APIs, and data pipelines built for reliability, observability, and growth.

Core AI and Backend Skills

Main skills include AI engineering, LLM application development, RAG pipelines, and scalable backend system design for production environments.

AI and Backend Employment History

Backend / AI Engineer at AllStarsIT AI Focus

Dec 2025 - Present (muvan.ai)

  • Supported and developed new features of the existing AI assistant.
  • Analyzed critical gaps and issues that prevented long-term evolution.
  • Designed and developed a new AI assistant version from scratch, including Amazon Bedrock integration, hybrid search, and smart follow-ups.
  • Took an active part in a generic domain-oriented Text2SQL mechanism.

Backend / AI Engineer at Glorium Technologies (Part-time) AI Focus

Sept 2026 - Nov 2026

  • Rapidly prototyped AI-powered proofs of concept from customer ideas.
  • Validated technical feasibility and prepared implementation plans for production features.

Senior Backend Engineer at ClickUp (Qatalog was acquired), Remote

Mar 2025 - Oct 2025

  • Implemented high-load performance optimizations for long-running replica queries.
  • Fixed core flow bugs affecting hundreds of thousands of users.

Senior Backend Engineer (AI experience) at Qatalog, Remote AI Focus

Sept 2023 - Mar 2025

  • Integrated external APIs for natural-language data retrieval using OpenAI.
  • Developed smart prompts for multiple AI tasks.
  • Implemented embedding caching to speed up query resolution.
  • Implemented AI answer parsing, processing, and client streaming.

Node.js Tech Lead, Team Lead at AppReal, Remote

Sept 2022 - Jun 2023 (konnecto.com)

  • Designed complex SQL queries for data analysis.
  • Built backend for a new client-facing product.
  • Implemented YouTube API integration and continuous data loading service.
  • Set up cron jobs for daily dashboard metrics recalculation.

Backend Lead at Personal project

Aug 2021 - May 2023

  • Set up AWS infrastructure as code for a mood-tracking mobile and Slack app.
  • Built the backend serverless architecture personally.
  • Configured CI/CD pipeline for development and production environments.

Node.js Engineer, Team Lead at Lohika (Capgemini Engineering), Kyiv / Remote

Dec 2018 - Aug 2022

  • Led a 7-person engineering team and launched a glucose tracking app on iOS and Android.
  • Drove cross-functional communication with product and UX across time zones.
  • Ran daily scrum meetings and coordinated frontend and QA delivery.
  • Built backend services personally and redesigned time-series data schema.
  • Built a new payment gateway service to improve customer integration.

Full Stack JavaScript Engineer at Accellabs, Cherkasy

Jan 2015 - Nov 2018

  • Set up architecture and built a web app for real-time emotional state tracking.
  • Tested throughput and scaled the app with PM2 to 1.5K concurrent users.
  • Built frontend features with Google Maps partner-merchant mapping and filters.
  • Implemented frontend for web and desktop Electron app for notaries.
  • Built and launched two iOS and Android apps for a UK museum to explore historical events on timeline and map.

Selected AI Impact

Education

Master's Degree, State Technological University, Cherkasy

2016 - 2018

Bachelor's Degree, State Technological University, Cherkasy

2012 - 2016

Let's Build Something Great

Hiring for Senior/Lead Backend AI Engineer roles? I can help your team build robust backend systems and practical AI features that drive business value.

Contact Me Download CV