Mykhailo

MYKHAILO ZINCHUK
FULL-STACK DEVELOPER (BACKEND HEAVY)

CONTACT PROFILE
[відкрити контакти](див. вище в блоці «контактна інформація») I’m a Full-stack Developer with 5+ years of experience building maintainable,
scalable applications. I focus on clean code, thoughtful architecture, and practical
Linkedin AI adoption to improve development workflows and product capabilities. I enjoy
solving complex problems and designing modern systems that are reliable,
Telegram efficient, and easy to evolve.

Kyiv WORK EXPERIENCE
Ekreative Oct. 2024 - present
SKILLS 1.8 years
Full-stack developer
Frontend Telehealth platform - NDA
React.js, Next.js, HTML, CSS/CSS3,
A large-scale healthcare platform serving 300K+ patients and connecting them with
SCSSS, Redux healthcare providers through appointment scheduling, longitudinal care programs,
health progress tracking, and real-time communication. The platform integrates with
20+ external systems across healthcare, accounting, payments, marketing, and other
Python
business domains.
Python 3 — OOP, type hints, standard
library, Flask, FastAPI, Django, PyQt, Team: PMOs; PMs; 30+ engineers across backend, frontend, and mobile teams;
several QA and AQA engineers
PySide6, pyserial, pytest, unittest, Celery
Responsibilities:
NODE.JS Core Backend Engineer on the Platform Modernization team, responsible for
evolving and modernizing critical parts of the legacy platform.
Nest.js/Express
Refactored complex modules and shared services, replacing outdated
Mocha+Chai, jest, ava, sinon implementation patterns and improving maintainability, testability, and
Socket.io, websockets extensibility across the platform.
Mongoose, Sequelize, TypeORM
Accomplishments:
Javascript, Typescript Built a webhook-ingestion module for Maxio, replacing synchronous per-request
calls with locally-persisted state — cut live Maxio calls ~100x and removed the
dependency that caused patient-facing failures (e.g., blocked video visits) during
Embedded
Maxio outages
C++, C, STM32/ESP32 - (learning) Helped establish structured AI development practices through reusable skills,
rules, and shared engineering standards
Migrated background job/cron infrastructure from an unmaintained, forked
Databases, MessageBrokers
library (Agenda) to BullMQ, unblocking a pending MongoDB upgrade eliminating
MongoDB, PostgreSQL, Redis, MySQL the maintenance burden of a forked third-party dependency in production
SQLite, BullMQ, RabbitMQ, Kafka
UniCode Software Feb. 2024 - May. 2025
Tools Full-stack developer 1.5 years
Git, Docker, Swarm, Orchestration, Tap N Pay — Restaurant Ordering and Management Platform
CI/CD Jenkins., Linux, Swagger, Nginx,
A digital platform for restaurants and food-service businesses that enables
Sentry Grafana, prometheus, loki,
customers to browse interactive menus, place orders, and complete payments
NetData, k6. AWS (S3, EC2, CloudFront, online. The platform also provides a back-office system for managing products,
ECS, ECR, EKS SNS, Route53, Lambda, menus, prices, orders, payments, and business operations.
SQS), Heroku Google cloud (GKE),
Team: Client, Full-stack developer, Frontend developer.
CloudFlare Telegram Api, Stripe,
OpenAI (agents sdk), Sendgrid, Responsibilities:
Worked as a full-stack developer in a small, fast-paced product team.
Facebook API
Communicated directly with the client to gather requirements, clarify business
EDUCATION needs, and define technical solutions.

National Technical University of Accomplishments:
Ukraine KPI Designed and built an on-premise printer server (Windows service via QZ Tray)
with a Node.js proxy layer, making receipt printing vendor-agnostic across
Computer Engineering restaurants' existing hardware and resolving encoding failures on specific printer
Bachelor's 2019-2023 models.
Integrated 4+ local payment and POS providers (Cardcom, HYP, Kashcash, Aviv
Master's 2023-2024
POS), expanding the platform's reach to restaurants locked into specific existing
payment/POS vendors — directly contributing to new client acquisition and
LANGUAGES platform revenue

English Upper intermidiate

COURSES Webbylab Jan. 2022 - Dec. 2024
Full-stack developer 3 years
Udemy:
Loyalty system
Microservices with Node JS and React System that can be integrated with the existing client’s systems and enable
businesses to attract new customers by offering them incentives using targeted
Serverless Framework Bootcamp: Node.js, marketing activities as well as retaining existing ones
AWS & Microservices
Team: PM, 2 QA engineers, Tech lead, 2 Back-end developers, Front-end developer.
Ultimate AWS Certified Developer Associate
Responsibilities:
Fwdays: Owned the order calculation engine, the core of the platform. It applies
promotions to a cart in real time (Buy X Get Y / 1+1, percentage and fixed
Crash Course: Technical Leadership discounts coupons) and supports multiple price lists per product
Designed an extensible promotion architecture: new marketing mechanics plug
in without changing core pricing logic
Owned release management: set up a dedicated release repository and CI/CD
pipelines for multi-environment deployments (dev / stage / prod) on Docker
Compose + Swarm
Built and maintained the observability stack: Prometheus metrics, Loki log
aggregation, Grafana dashboards and alerting
Drove performance work: load testing with k6, MySQL query optimization
(indexing, query restructuring)
Contributed to the React frontend and worked closely with designers and
frontend developers to deliver features end-to-end, from API design to UI

Accomplishments:
Made order calculation 30× faster, from 15 s to 500 ms. I replaced an exhaustive
search over promotion combinations (exponential in cart size) with a greedy
algorithm that ranks combinations by discount per product. It gave the expected
results on the full test suite
Released an alpha version within 2 months to coincide with the demo,
showcasing new functionalities such as enhanced user rewards tracking and
automated triggers

Automated KYC Onboarding Solution
Omnichannel client verification and registration software

Team: PM, 2 QA engineers, Tech lead, 2 Back-end developers, Front-end developer.

Responsibilities:
Built the platform from scratch: chose the tech stack and designed the
architecture with scalability in mind.
Designed a configuration engine for onboarding flows. Required fields and their
types (string, enum, date, image) are set in configuration and validated at
runtime, so new flows and clients launch without code changes.
Integrated 3 identity verification and AML/sanctions screening providers behind
a single provider interface.
Introduced BullMQ for background processing with parent-child job flows. Each
step of a verification ([document check→ →
liveness screening]) runs as a
dependent job with retries and failure handling.
Planned and delivered features end-to-end together with PM and stakeholders.

Accomplishments:
Successfully delivered the Minimum Viable Product (MVP) to the client within 2
months, showcasing omnichannel client verification and registration capabilities.
This achievement facilitated rapid user onboarding and increased activation
rates.
Implemented a scalable and efficient automated KYC (Know Your Customer)
onboarding solution, integrating with various screening and identification
providers to ensure robust client verification processes.