Andrii

ANDRIY KENDIUKH
Backend Developer
📍 Odesa, Ukraine ✉️ [відкрити контакти](див. вище в блоці «контактна інформація») 📱 [відкрити контакти](див. вище в блоці «контактна інформація») 💼 LinkedIn 💻 GitHub 📨 Telegram

PROFESSIONAL SUMMARY

Backend Developer with 2 years specializing in API architecture, database optimization, and payment system integrations for
scalable SaaS platforms. Expert in PostgreSQL performance tuning, RESTful API design, and third-party integrations
(Stripe, OAuth 2.0). Full-stack foundation enables seamless collaboration with frontend teams and end-to-end feature
ownership. Currently expanding expertise in Node.js and Python ecosystems while delivering production-grade backend
solutions in international teams.

TECHNICAL SKILLS

Backend & Database Integrations & Infrastructure
Xano, Node.js, Prisma ORM, PostgreSQL, RESTful APIs, Stripe, Google OAuth, LiqPay, Resend, Git, GitHub, Vercel,
NextAuth.js, OAuth 2.0, Webhooks WeWeb, Redis (learning), Docker (learning)

Frontend Development Development Tools
React, Next.js (SSR, App Router), TypeScript, JavaScript, Claude Code CLI, ChatGPT, Vite, Redux Toolkit, Postman, Git
HTML5, CSS3, Tailwind CSS, SCSS, ShadCN/UI workflows, CI/CD

Languages: Ukrainian (native), English (B2 - professional working proficiency)

PROFESSIONAL EXPERIENCE

Backend Developer (Xano) | Di-Atomic May 2025 – Present
B2B AI-Driven Global Trade SaaS Platform
Primary backend developer for early-stage SaaS serving 100+ B2B users within 6-person cross-functional team

Full-Stack Feature Ownership: Architected and deployed complete authentication system, user dashboard, and payment
infrastructure for multi-module platform (apexAI, cognitoAI, engageAI)
Email Intelligence (apexAI): Developed and deployed automated email parsing engine processing 500+ emails daily with 95%
accuracy using custom regex patterns and AI integrations
ICP Discovery (cognitoAI): Designed optimized database schema and API endpoints, reducing data retrieval time by 60%
through query optimization and strategic indexing
Payment Infrastructure: Integrated Stripe payment system with webhook handling for 3-tier subscription model, maintaining
99.9% transaction reliability
Google OAuth 2.0: Architected secure authentication flow with token exchange, session management, and role-based access
control
Performance Optimization: Refactored backend codebase and normalized PostgreSQL database schema, improving average
API response time from 850ms to 180ms (78% improvement)
API Development: Designed and deployed 25+ RESTful endpoints serving 1,000+ daily requests with 99.5% uptime

Tech: Xano, WeWeb, PostgreSQL, Stripe API, Google OAuth 2.0, RESTful APIs, Webhooks

Full-Stack Developer | Freelance & Personal Projects Feb 2024 – Apr 2025
E-commerce Applications & System Migrations

Next-Pizza E-commerce Platform

Developed full-stack pizza delivery application with complete shopping cart, order management, and payment processing
Implemented server-side rendering with dynamic product filtering and search, achieving 95+ Lighthouse performance score and
40% SEO improvement
Integrated multi-provider authentication (NextAuth.js: Email, GitHub, Google OAuth) and LiqPay payment gateway with order
tracking
Designed normalized Prisma/PostgreSQL schema with optimized relational structures, deployed on Vercel with 99.8% uptime

Client Projects

Online Store: Built responsive React application with REST API integration, Redux state management, and mobile-first design
approach
Legacy System Migration: Successfully migrated build system from Gulp to Vite (93% faster builds), implemented code
splitting (60% bundle size reduction), collaborated with PM and client through weekly demos

Tech: Next.js, React, TypeScript, Prisma, PostgreSQL, NextAuth.js, LiqPay, SCSS, Redux, Vite, Vercel

Additional Technical Experience
Code Review: Conducted 20+ peer code reviews focusing on security vulnerabilities, API design patterns, and performance
optimization
Technical Interviews: Participated in technical screening interviews, evaluating candidates' problem-solving abilities and code
quality standards
AI-Assisted Development: Utilize Claude Code CLI daily for automated code review, refactoring suggestions, and debugging
complex issues

EDUCATION

Bachelor of Science in Information Systems and Technologies (4th Year)
Odesa I.I. Mechnikov National University
Relevant: Database Systems, Algorithms, Data Structures, Web Development, Software Engineering

WHAT SETS ME APART

✓ Backend Infrastructure Ownership: Full lifecycle from ✓ Performance-Focused: Proven optimization track record
schema design to production deployment (78% API improvement)

✓ Full-Stack Foundation: Frontend knowledge enables ✓ Database Expert: PostgreSQL optimization and schema
better API design architecture

✓ Integration Specialist: Complex payment systems and ✓ International Teams: Effective communication in English-
OAuth flows speaking environments

CAREER GOALS

Seeking Backend Developer opportunities to deepen expertise in Node.js, Python, and distributed systems architecture.
Leveraging strong full-stack foundation to build scalable backend solutions, optimize database performance, and design
robust APIs. Focused on joining product-driven teams where I can own backend infrastructure and continue growing toward
senior-level backend engineering.