Senior Engineer Full-Stack Agentic AI LLMs RAGs LoRAs

Kaloyan D. Bozhkov

Highlights

I've spent the past decade designing and developing client and server-side software and bringing it to life in production. Personally, I fancy efficient system design, taking ownership and delivering value, fast. These three things have been key to my growth and success.

  • 12+ yrs of experience with UI/UX design and full-stack development of software systems

  • 9+ yrs of production experience with JS, CSS/SCSS, Webpack and Babel

  • 7+ yrs of production experience with React, Redux/Zustand and Micro-frontends architectures

  • 7+ yrs of production experience with Node.js, TypeScript and Micro-services architectures

  • 6+ yrs of production experience with AWS S3, EC2s, Lambda etc..

  • 6+ yrs of experience with Figma & UI/UX Design, and +2 with Pencil.dev

  • 5+ yrs of production experience with Prisma, tRPC, Zod

  • 5+ yrs of production experience with Cypress, Jest, Enzyme and React Testing Library

  • 4+ yrs of production experience with LLMs, RAGs, Embeddings, Memory Layers, LoRAs, ComfyUI/Video/Voice/3D models etc..

  • 5+ yrs of production experience with Next.js [pages & app routers], Vercel & Netlify

  • 4+ yrs of experience with TailwindCSS, Three.js, React Three Fiber and D3.js

  • 4+ yrs of production experience with Python, Django, Flask and SQLAlchemy

  • 4+ yrs of experience with Docker, CI/CD pipelines etc..

  • 2 yrs of experience with Rust

  • 1 yr of experience within the Blockchain and Web3 space

Tech Skills

LLMs, RAGs, Memory Layers, Multimodal Embeddings, Voice Models, LoRA models, ComfyUI
OpenClaw, NanoClaw, Agentic AI systems, MCP, Promptfoo
Node.JS, TypeScript, Python, Rust
tRPC, graphQL, REST
Zustand, Redux, Zod, Three.JS, D3.JS, React Query, Apollo Client
Eslint, Stylelint, Prettier, Husky, WebPack, Babel, Code Generator
Prisma, Postgres, PGVector, MySQL, Firestore, SQLAlchemy
Docker, AWS, Google Cloud Console, Vercel, Netlify
CI/CD, Continuous deployments
Cypress, Playwright, Jest, Enzyme, React Testing Library
Express, Next.JS, React, MUI, TailwindCSS, SCSS
Figma, Pencil.dev, Cursor
Electron, React Native

Experience

Senior Full-Stack AI Engineer

Element Human

(8/2025 - Present, remote)

  • Built and maintain a custom fork of nanoclaw, a multi-provider agent orchestration runtime running a structured 15+ agent pipeline with role separation and custom skills. Exposed it through a Telegram control interface over a private Tailscale mesh, enabling agents to be dispatched and their output previewed live from any device.

  • Built an MCP server exposing the company's ad-effectiveness platform as a conversational agent, letting enterprise clients query performance forecasts, benchmark comparisons, and measurement reports directly from their own AI tooling.

  • Designed the backing memory service, an embedding-based retrieval layer giving EH agents persistent per-client context across sessions.

  • Claude's therapist, full time

Senior Full-Stack AI Engineer

Fanvue

(6/2024 - 7/2025, remote)

LLMs, RAGs, Memory Layers, Multimodal Embeddings, Voice Models, LoRA models, ComfyUI
Next JS, Typescript, MUI, Zod, Zustand
PGVector, Prisma, tRPC, Postgres
Amplitude, Sentry, Upstash

Acted as a core contributor to the AI team, staying on top of cutting-edge advancements and driving innovation through the following feature deliveries:

  • Enabled creators to easily train their own LoRA models allowing both real and AI creators to generate personalized images.

  • Built a chat fact extractor to surface key information from creator–fan conversations.

  • Created AI Notes with semantic search powered by embeddings, also offering top 10 facts, must-knows, and other smart filters.

  • Designed a memory layer for storing fan-specific facts, powering personalized AI interactions and fan insights.

  • Introduced real-time AI voice calls using custom-trained voice models (VAPI + ElevenLabs).

  • Automated creator messages for key events such as subscribes, follows, and unfollows.

  • Built intelligent auto-replies and fully automated chats using LLMs, enriched with creator personality and context from both short- and long-term memory.

  • Implemented semantic search for AI-tagged media content.

  • Analyzed hundreds of thousands of chat messages using AI to identify and categorize dangerous or risky topics.

  • Implemented a 'vibe checker' system to ensure AI conversations remain safe and aligned with contextual guidelines.

  • Worked on flagging bad medias (CSAM, underage, deepfake or celebrity) during the upload phase.

Assisted the team across the full stack:

  • Developed template messaging tools to help agencies manage chats more efficiently.

  • Blocked flagged media from displaying in a variety of places across the platform.

  • Collaborated with the UI/UX team on feature design and led end-to-end project delivery.

  • Conducted interviews and evaluated applications for senior engineering candidates as part of the hiring process.

Senior Full-Stack Engineer

Element Human

(6/2021 - 6/2024, remote)

TypeScript, Next.JS, Prisma, Zod, tRPC, Clerk
React, Zustand, Redux, TailwindCSS, SCSS
Jest, Enzyme, React Testing Library
Webpack, Babel
Python, Django, Flask, SQLAlchemy, PostgreSQL
Docker, Google Cloud, GitLab CI
Figma, Phrase
Biometric, Timeseries and Human Emotion Data

  • Built the CTV ad measurement integrations for Netflix and Amazon Prime, delivering the platform-specific environments each required. Both converted into ongoing enterprise accounts and are now among the company's largest by recurring revenue

  • Backoffice rewrite (Django -> Next.JS)

  • Heat map generation automation for reports (AWS EC2s, Express)

  • Revamped the "survey engine" project by designing a new architecture and implementing it with the latest technologies, this resulted in enhanced efficiency, scalability and 100% reliability

  • Established a scalable system architecture for periodically E2E testing multiple interconnected systems, resulting in continuous operational reliability throughout the years.

  • Led collaborative efforts with business partners, orchestrating the systematic collection of requirements and formulating strategic action plans for the design and development of innovative projects and features. Executed leadership strategies that ensured a 35% acceleration in project delivery, consistently meeting or exceeding established timelines.

  • Significantly elevated observability for multiple micro-frontends by establishing uniform logging standards through the implementation of a custom abstraction layer atop Datadog. This strategic effort not only enhanced monitoring efficiency by 25% but also facilitated a more cohesive debugging process across diverse teams, fostering a collaborative and streamlined approach to issue resolution

  • Implemented survey localization, empowering clients to extract metrics from new markets (Spain, Italy, Germany, France, South Korea), enhancing global reach and market insights.

    Explore short demos of a few of these achievements:

  • Project Mercury, introduced completely new, subscription based, income stream for the business

  • TikTok, enabled business partners to target more creators, resulting in £10k RMR

  • Instagram, fully configurable social environment and..

  • Facebook, for seamless ad campaign performance testing

  • Instagram Carousels, the carousels feature elevated the competitive edge of our business partners

  • YouTube Shorts, has unlocked benchmarking influencer marketing via YT.

Senior Full-Stack Engineer

Clutchy

(12/2020 - 6/2021, remote)

Node.JS, GraphQL, Firebase
React, TailwindCSS, Apollo Client
Docker, AWS, GitLab CI
NFTs, Sui blockchain

  • Streamlined community Bids process through strategic system design changes, resolving glitches and improving user experience, leading to a 65% decrease in support tickets and a 86% increase in successful bids

  • Strategically led the management of listing and delisting processes within the NFT marketplace, successfully delivering key features. Achieved a 20% reduction in processing time, optimizing platform efficiency and enhancing overall user experience

Software Engineer

Lotto Systems

(8/2019 - 11/2020, Chester, UK)

React, Redux, Chakra UI, SCSS
Jest, Enzyme, React Testing Library
TypeScript, Node.JS, PostgreSQL, Golang
Docker, GitLab CI
Figma

  • Designed and developed a captivating slot machine game deployed on 150 units, achieving a user engagement rate of 90% and contributing to a 15% increase in overall gaming revenue
  • Collaborated on a horse betting platform, implementing a micro-frontend architecture that efficiently processed real-time horse racing data, resulting in a 25% improvement in platform responsiveness and a 20% reduction in data latency

Software Engineer

MWL Systems

(10/2018 - 8/2019, Wrexham, UK)

React, Redux, SCSS, LASS
TypeScript, Node.JS, PostgreSQL, C# .NET, EntityFramework
Webpack, Babel
Jest, Enzyme
GitLab CI
Figma

  • Led the successful delivery of 15 critical features for existing projects, ensuring the satisfaction of 100% of client and business requests within specified timelines

  • Effectively managed the intricate back-end operations of a monolith project, optimizing performance and reducing system response time by 20% through strategic enhancements

Junior Software Engineer

Daila srl.

(5/2016 - 9/2016, Osio Sotto, IT)

CSS, HTML, JavaScript, JQuery
PHP, MySQL

  • Developed a local company website and managed its SEO, driving traffic up by 40%

  • My humble "commercial work" origins :)

Publications

Next.JS + Vercel issue identified related to the undici polyfill

Article Link

Helped 200+ engineers with solving an edge-case caused by an issue with the compiled undici polyfill used by Vercel and Next.JS

Migrating from PlanetScale to Neon, using Prisma and pgloader

Article Link
Helped 57+ engineers with migrating from PlanetScale SQL to Neon PosgreSQL, following the announcement of the impending retirement of the PS Hobby plan.

Personal Projects

The Million Dollar Channel

Marketing Platform

8/2026 - 8/2026

Selling 1M seconds of a YouTube channel for $1 each. Will be using this platform to market my, and my friends' projects. Inspired by the legendary million dollar homepage.

Next.JS, TypeScript, React, S3, Rekognition, Lambdas, YouTube Data API, Stripe, Zod, Zustand, Tailwind

"На Сляпо" | @naslqpo

Live Comedy Dating Show

3/2025 - Present

I organise a live comedy dating show simiar to "UpDating". It's a hobby project that's slowly gorwing (3.3k followers), pushes me outside of my daily routine and, importantly, also serves as a distribution channel for some of my apps.

Adobe Premier Pro, Meta Ads, Content Production, Social Media, Adobe Photoshop, Nanobanana, LoRAs, Seadance, Marketing

Eventwoo

Events & Ticketing

2/2026 - Present

Event management platform for creating events, selling tickets, scanning QR tickets at the door, and tracking sales analytics + role management, custom org FEs.. and much more!

Vercel, Tailwind, Zustand, Zod, Next.JS, TypeScript, Vercel, AWS, Postgres, Resend, Stripe

SayCheese 📸

Guest Photos Management

3/2026 - 4/2026

No-app-required event photo platform where hosts create an event, share a QR code, and guests instantly upload their photos into one branded, high-resolution live gallery for weddings, birthdays, graduations, parties, and other celebrations.

Tailwind, Zustand, Zod, Next.JS, TypeScript, Vercel, AWS, Postgres

Disbond

FPS Multiplayer Game

4/2026 - Present

A PvP multiplayer zombie shooter. 2 game modes. 8 classes. Do what you must to survive and lead the scoreboard, but who can you truly trust? Because one bite turns you and the wrong turn bites you.

Unreal Engine 5

SvetlaEstetica

E-Commerce

1/2026 - 1/2026

Beauty center appointments & e-commerce platform.

Next.JS, TypeScript, Prisma, Stripe, zod, zustand, React, Postgres, AWS

CVBoz

SaaS

3/2026 - 3/2026

Free CV builder MVP with AI pdf imports, AI chat, metrics on visits, link clicks, dwell time and more. This cv is hosted on it 😎

Tailwind, Zustand, Zod, Next.JS, TypeScript, Vercel, AWS, Postgres, Resend

LinkBase

Personal CRM Mobile App

6/2025 - Present

Mobile app for connections memory, recall connections, stories and objects by facts or images.

React Native, Expo, Native Tailwind, TypeScript, Zustand, Zod, tRPC, Prisma, Postgres, PGVector, AWS S3, Lambda, Memory Service, Embeddings, RAGs

Automated IG Reels & Posts

Marketing Automation

11/2020 - 3/2021

Automated reels of daily T-Shirt releases for aicaramba.io

Live coding it here

TypeScript, Next.JS, Prisma, Zod, REST, React, Remotion, Tailwind, Replicate, OpenAI, Meta Graph API, Canvas, Skia, AWS, QStash

AICaramba

E-Commerce

12/2022 - 4/2024

Dropshipping AI-powered unique T-Shirts & user galleries & marketplace.

Coding it at 3AM live here.

TypeScript, Next.JS, NextAuth, Prisma, tRPC, Zod, React, Zustand, SCSS, Mantine UI, ESLint, StyleLint, DALL-E, Replicate, OpenAI, Stripe, Google Merchant, Three.JS, Canvas, AWS, Vercel, QStash

EnryptVid

Prototype

2/2022 - 2/2022

Passion project I worked on for close to a month. In it I explore pixel manipulation and FFMPEG-WASM for edge rendering videos using filter configurations chosen via the live preiew.

FFMPEG-WASM, TypeScript, React, Mantine UI, Canvas

Mini-Blockchain

Prototype

2/2020 - 2/2020

SPA written with React JS to showcase the logic behind blockchain based technologies like Bitcoin. It essentially gives the blockchain data structure a visual GUI representation, that users can interact with.

React, SCSS, JavaScript

In1Minute

Youtube Channel

8/2016 - 1/2022

I was making 2D style, silly yet educational, animations as a hobby project. Some took off with the most popular clip hitting 1.4M views. At one point I was managing 2 artists and 1 junior video editor. Due to the nature of the video topics, the account was shadow banned from the algorithm's suggestions, and the following content performed poorly, even after a rebrand to live coding.

The goal of this hobby project had always been to end up with a distribution channel for my Android game, and for the other ideas I aimed to manifest.

Game of Boz

Android Game

3/2014 - 3/2015

Android jump platformer with in-app skin purchases.

Construct, JavaScript, MoPub, Google Adsense

Education

BSc of Computer Science - Computing, Networking & Security

Glyndwr University

9/2018 - 5/2021, Software Engineering

TravelBuddy
Solution to the Traveling Salesman Problem with Dijkstra's algorithm and data from Google Maps. Implemented as a road trip planner in the form of a Web App

React, Redux, SCSS, D3.JS, Firebase, Google oAuth

Computer Science & Technology

I.T.C. B. Belotti

9/2012 - 5/2017, Bergamo, Italy

SvetlaEstetica

E-commerce website for a local Italian beauty company.
Was rewritten with Next.JS and new tech in 2025.

HTML, CSS, JQuery, JavaScript, PHP, MySQL