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Bek Khaitbaev
Verified Expert in Engineering
Node.js Developer
Tashkent, Tashkent Province, Uzbekistan
Toptal member since February 18, 2015
Bio
As an accomplished full-stack developer, Bek brings a wealth of experience creating dynamic, high-performance web applications for leading companies. He excels in both front-end and back-end development and has a proven track record of delivering innovative solutions and enhancing user experiences. His dedication to quality and efficiency makes him a valuable asset in any project, ready to tackle complex challenges and drive success.
Portfolio
Goverment Agency (under NDA)
Python 3, Large Language Models (LLMs), Docker, LlamaIndex, WandB...
Qonto
Ember.js, Node.js, React, Python 3
Dropon
Ember.js, Node.js
Experience
- Node.js - 10 years
- PostgreSQL - 6 years
- React - 5 years
- Docker - 5 years
- OpenAI - 3 years
- LlamaIndex - 2 years
- Vector Databases - 2 years
Preferred Environment
Zed, MacOS
The most amazing...
...project I’ve built includes an image search engine that identifies real estate listings from photos alone via image embeddings and machine learning techniques.
Work Experience
Applied AI Engineer
2024 - 2025
Goverment Agency (under NDA)
- Built an agentic RAG system that ingested internal documents and enabled semantic search across organization-wide knowledge bases, leveraging GraphRAG and LlamaIndex.
- Fine-tuned state-of-the-art automatic speech recognition models on domain-specific datasets, optimizing performance on specialized vocabulary and improving word error rate (WER).
- Managed and set up an AI compute cluster leveraging vLLM for efficient model deployment and inference.
Technologies: Python 3, Large Language Models (LLMs), Docker, LlamaIndex, WandB, Optical Character Recognition (OCR), Machine Learning Operations (MLOps)
Lead Front-end Engineer
2020 - 2025
Qonto
- Played a key role in building the online banking platform's core features like card limits, multi-accounts, and role management.
- Maintained and improved internal libraries used across the front-stack.
- Designed and implemented codemods enhanced with AI heuristics to ensure safer, large-scale transformations of Ember.js-based code to React.
Technologies: Ember.js, Node.js, React, Python 3
Senior Front-end Engineer
2017 - 2018
Dropon
- Constructed a complex interactive map to track freight position and schedule.
- Built a CRM functionality into a web application to manage customers and delivery schedule.
- Increased test coverage of the front-end web application from 20% to 95%.
Technologies: Ember.js, Node.js
Full-stack Engineer
2016 - 2017
Mercedes Benz USA
- Served as a key collaborator in improving the performance of a large web application.
- Wrote detailed tests for each component added to the application.
- Reviewed the code of other peer developers in the team.
- Maximized UI component reuse by unifying and generalizing UI component code and styles.
Technologies: Node.js, Ember.js
Web Developer
2016 - 2017
OnlyGrowth
- Decreased app payload by removing dead code and decreasing dependencies on third-party libraries.
- Set up a bug tracking system both on back-end and front-end to effectively monitor each release.
- Effectively used caching with Redis to minimize requests to the database.
- Introduced and followed the Git-flow practice for the project. Made sure that each release follows SemVer versioning.
Technologies: Node.js, Ember.js
Web Developer
2016 - 2016
Timbuktutravel
- Developed and delivered pixel-perfect, reusable UI components aligned with design specifications, ensuring consistency, responsiveness, and cross-browser compatibility to enhance user experience and maintain design system standards.
- Refactored and optimized Sass codebase by eliminating duplicate styles, modularizing components, and improving variable/mixin reuse, resulting in cleaner, more maintainable stylesheets and enhanced development efficiency.
- Enhanced UI components to be fully responsive and mobile-friendly, implementing fluid layouts, flexible grids, and media queries to ensure seamless functionality and consistent user experience across devices and screen sizes.
Technologies: Google Maps API, Ember.js
Web Developer
2015 - 2016
Inprod.io
- Built a highly interactive multidimensional chart with Crossfilter and D3.js, which operated on a large set of data.
- Utilized promises and ES6 syntax to write clean, robust code.
- Wrote integration, acceptance, and unit tests for critical parts of the app utilizing Ember Mirage.
- Turned some parts of my work into an Ember add-on, which was open-sourced (ember-slack-search-input).
- Improved the UI/UX of the app by adding custom UI elements and animations, which made the app cleaner and easier to use.
- Used heavily customized Ember data with custom adapters, serializers, and transformers.
- Created a touring/onboarding for the app, which showed all essential parts of the app.
Technologies: Ember.js
Full-stack Developer
2015 - 2016
Qliktag.com
- Refactored back-end code to utilize promises using Bluebird.js.
- Upgraded all outdated libraries through incremental adaptation of a new API.
- Improved the build system of front-end code to increase the speed of render time.
- Created an image upload to the S3 pipeline with image processing.
- Improved integration with S3 by using Node.js streams.
Technologies: ImageMagick, Amazon S3 (AWS S3), Node.js
Ember.js Developer
2015 - 2015
Medify
- Converted a CoffeeScript-based project to ES6 JavaScript.
- Wrote acceptance tests using mock data with Ember Mirage.
- Utilized all Ember 2.x features to write clean and performant code.
- Designed and implemented interactive, data-driven visualizations using D3.js, enabling dynamic exploration of complex datasets through features such as tooltips, transitions, zooming, and filtering to improve data accessibility and decision-making.
- Implemented and maintained a robust continuous integration and continuous delivery (CI/CD) pipeline, automating build, testing, and deployment processes to ensure faster release cycles, higher code quality, and reduced risk in production deployments.
Technologies: Ember.js
Front-end Engineer
2013 - 2015
OneTwoTrip
- Worked as a front-end engineer for multiple projects, including the mobile version of the site.
- Made a front-end build system based on Grunt used in production.
- Assisted in implementing authentication for the mobile version of a site.
- Created and tested HTML letters to work on all email clients using litmus.com.
- Assisted in creating a new product based on Ember.js.
- Collaborated effectively with a distributed, multinational team across multiple time zones, leveraging agile methodologies and strong communication practices to ensure alignment, knowledge sharing, and timely delivery of project milestones.
Technologies: Ember.js, Node.js, JavaScript
ActionScript Developer
2012 - 2012
uNapse
- Profiled ActionScript code to find and fix all bottleneck areas, slowing down the application.
- Refactored and optimized the code, replacing event-based flow with delegation.
- Utilized the Greensock library to create complex animations.
Technologies: GreenSock
Experience
Yukon
https://yukon.uz/I’m building a personal startup that automatically crawls and consolidates freight and logistics opportunities from multiple sources, including load boards, Telegram channels, and various websites. The system leverages the OpenAI API for advanced natural language processing and structured data parsing, transforming unorganized postings into a clean, searchable, and actionable format. This creates a unified platform that helps users quickly identify relevant loads, streamline their workflows, and reduce the time spent monitoring fragmented sources.
Education
2010 - 2013
Bachelor's Degree in Computing and I.T.
University of Surrey - Guildford, UK
Skills
Libraries/APIs
Node.js, React, Puppeteer, ImageMagick, Google Maps API
Tools
Docling, Codex, GreenSock, RabbitMQ, Zed
Languages
JavaScript, Python 3
Frameworks
Ember.js, Electron, Redux, Next.js, LlamaIndex, Alembic, Accelerate
Platforms
RunPod, Docker, Firebase, Open WebUI, Amazon Web Services (AWS), Kubernetes, MacOS
Storage
PostgreSQL, Amazon S3 (AWS S3), Redis, Elasticsearch
Other
OpenAI, BullMQ, Google SEO, Embedding Models, Retrieval-augmented Generation (RAG), Pinecone, Qdrant, Pgvector, WandB, Hugging Face, Large Language Models (LLMs), Open-source LLMs, Vector Databases, Optical Character Recognition (OCR), MinIO, Artificial Intelligence (AI), Timelines, Machine Learning, Machine Learning Operations (MLOps)
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