Oleksandr Yusypenko

Oleksandr Yusypenko

Senior Full-Stack + AI Engineer

Specializing inAI Integrations

Building scalable platforms with AI — from event-driven services to OLAP analytics. 8+ years delivering production-ready solutions across AI, e-commerce, healthcare, Web3 and beyond.

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Career Highlights

Production systems shipped across industries and time zones

0+
Years Experience
0M+
Records in Production Analytics
0×
Dashboard Query Speedup
0
Countries Worked In

Experience

8+ years of building scalable applications

Jan 2025 - Present|Germany (Remote)

Senior Full-Stack Developer

BinaryBuilders

Main developer on 3 products — GovChime (federal contract intelligence, ETL + CQRS with ClickHouse OLAP over 300M+ records), Melio MealPlan AI (LangGraph meal-generation platform), and Feels Protocol (Solana DEX with a Rust indexer).

~5s → <200ms
300M+ Records
3 Products
Next.js
React 19
TypeScript
Tailwind CSS
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Nov 2023 - Dec 2024|Germany (Remote)

Senior Full-Stack Developer

Filament

Built NestJS backend for Web3 airdrop governance platform — multi-chain transactions, campaign lifecycle, and automated on-chain token distribution.

Multi-Chain
Event-Driven
NestJS Backend
NestJS
Node.js
PostgreSQL
Redis
+7 more
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Nov 2022 - Nov 2023|Estonia (Remote)

Senior Full-Stack Developer

Primsell

Developed Web3 NFT e-commerce platform with 10K+ item support, IPFS storage and technical leadership.

10K+ Items
Team Leadership
Full NFT Lifecycle
NestJS
Node.js
PostgreSQL
Redis
+14 more
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Feb 2020 - Nov 2022|Ukraine

Senior Full-Stack Developer

LITSLINK

Built gamification platform for industrial employee productivity — 20+ chart modules, real-time WebSocket leaderboards.

20+ Charts
35% Faster
Real-Time
React
Next.js
TypeScript
MobX
+8 more
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Mar 2018 - Feb 2020|Canada (Remote)

Front-End Developer

GeeksForLess Inc

Developed healthcare analytics dashboard for Canadian hospitals with 100+ KPIs and schema-driven UI.

100+ KPIs
20+ Charts
Schema-Driven UI
Svelte
React
TypeScript
MobX
+9 more
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Tech Stack

Modern technologies I use to build scalable, performant applications

Backend

Node.js
NestJS
PostgreSQL
Redis
ClickHouse
Fastify

Frontend

React
Next.js
TypeScript
Tailwind
Svelte

AI & ML

LangChain
RAG
OpenAI
Claude Code
LangGraph

DevOps & Tools

Docker
AWS
Vercel
GitHub
CI/CD

Also experienced with

GraphQL
REST API
WebSocket
JWT/OAuth
MongoDB
Chart.js
RabbitMQ
OLAP
Langfuse
tRPC
Vector DB
Jest
Playwright
Git

Areas of Expertise

Production AI is my core focus, backed by end-to-end full-stack, frontend, and data architecture experience.

Core focus
Production AI Systems
I build and operate reliable AI capabilities for B2B SaaS and data-heavy products — from new product features and knowledge systems to agent-assisted workflows integrated with existing data and software.

AI Product Features

Add a reliable AI capability to an existing SaaS product, from the user experience and API through evaluation and rollout.

  • Copilots and product assistants
  • Document intelligence and personalized generation
  • AI search, recommendations, and product-facing agents
  • Real-time and streaming interfaces

AI Workflows & Agents

Turn multi-step product or operational work into a controlled agent-assisted flow connected to the tools your team uses.

  • CRM, helpdesk, and internal-tool integrations
  • Structured extraction and classification
  • Approvals, escalation, and human review
  • Tool use, persistent state, and audit trails

Knowledge & Decision Systems

Make proprietary documents and structured data usable through grounded search, matching, analytics, and decision support.

  • RAG, enterprise search, and hybrid retrieval
  • Opportunity matching and analytics assistants
  • Source-grounded answers and safe fallbacks
  • Data-quality and schema-drift controls
Explore my AI engineering work
Full-Stack Engineering
I build scalable web applications using NestJS, Next.js, TypeScript, and PostgreSQL. From MVPs to enterprise systems, I deliver clean, maintainable code that grows with the product.
  • Node.js & NestJS
  • React & Next.js
  • PostgreSQL & Redis
  • REST/GraphQL APIs
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Front-End Engineering
I build pixel-perfect, performant interfaces with React, Next.js, TypeScript, and Tailwind CSS. Responsive designs, smooth animations, and accessible UI components.
  • React & Next.js
  • TypeScript
  • Tailwind CSS
  • Framer Motion
Learn more
Backend & Data Architecture
I build high-performance backends with NestJS, ClickHouse OLAP analytics on 300M+ row datasets, and event-driven ETL + CQRS architectures. AI-augmented development workflow with Claude Code and TDD-driven AI for rapid, quality delivery.
  • ClickHouse & OLAP Analytics
  • ETL + CQRS Architecture
  • AI-Augmented Development
  • PostgreSQL & Data Pipelines
Learn more

Frequently Asked Questions

Common questions about my experience and how I work

A full-time senior or staff engineering role — full-stack, backend, or AI engineering. I'm currently a senior full-stack developer at BinaryBuilders and open to my next full-time position. I'm not looking for freelance or consulting engagements.

Have more questions?

Get in Touch

Get in Touch

Hiring for a senior engineering role, or have a question about my work? I'd love to hear from you.

Or reach out directly:

info@yusypenko.comWhatsAppLinkedIn

Prefer to talk? Schedule a short intro call →