Oleksandr

Oleksandr Polishchuk
Full-Stack Developer

SUMMARY
Full-Stack Developer specializing in creating interactive web solutions using
modern technologies. My work includes a full development cycle - from idea
to implementation.
My strengths:
Practical experience in creating full-fledged web applications
Ability to work with APIs and dynamic data
Adherence to modern layout and interactivity standards
CONTACT Ability to quickly master new technologies
I am looking for an opportunity to join a team as a Full-stack or
Addres Frontend Developer, where I can apply my skills on real projects, learn from
Turku, Finland experienced colleagues and contribute to product development. My goal is
to constantly develop as a specialist and participate in the creation of high-
Phone
quality web solutions.
[відкрити контакти](див. вище в блоці «контактна інформація»)
Web COMMERCIAL EXPERIENCE
[відкрити контакти](див. вище в блоці «контактна інформація») Clinical Data Studio – Full-Stack Developer |Zenbit Tech
Linkedin Enterprise SaaS for medical document anonymization (HIPAA, GDPR, UK GDPR, FADP
GitHub compliance). Integrated with Microsoft Presidio for PII detection.
Frontend (React / Next.js):
Built pricing & subscription system (Free/Pro plans, payment modal, daily limits)
TECH SKILLS Developed a dashboard with 6 charts (Recharts), analytics, and trends
Implemented i18n for 6 languages (EN, DE, ES, FR, IT, NL)
HTML5/CSS Created reusable modal system, feature-flag system, responsive header/footer
with accessibility support
JavaScript Reduced main bundle from 1,955 kB to 133 kB (-93%) via code splitting
Backend (NestJS / TypeScript):
Built Analytics Module from scratch – 7 dashboard endpoints with complex SQL
React
aggregations. Used Promise.allSettled for resilience
Implemented Pricing & Subscription Module – daily limits, plan management,
Next.js SubscriptionLimitGuard, unit tests (269 lines)
Created Framework Profiles for HIPAA, GDPR, UK GDPR, FADP – registry pattern
Node.js, Nest.js with entity rules, score thresholds, ad-hoc recognizers
Added period filter for analytics dashboard – preset (7/14/30 days) or custom
TypeScript range

Express.js PROJECT EXPERIENCE
REST API LearnLingo – Full-stack platform
React, Next.js, TypeScript, Node.js, Express, MongoDB, JWT, CSS Modules
MongoDB, MySQL Language learning platform with role-based dashboards (student/teacher), booking
system, real-time notifications.
GIT
Read Journey – Reading tracker
Next.js, TypeScript, Redux Toolkit, RTK Query, JWT, CSS Modules
Postman
Personal library, reading sessions, progress statistics, JWT authentication.

SOFT SKILLS Travellers APP– Social platform (Team project)
Next.js, React, TypeScript, Node.js, Express, MongoDB, Zustand, TanStack Query
Role: Team Lead & Full-Stack Developer. Led code reviews, coordinated tasks,
Teamwork managed deployment. Implemented secure JWT authentication with HTTP-only
cookies.
Adaptability & Learning Agility

Problem-Solving EDUCATION
IT School GoIT
Time management
Fullstack Developer 2024 - 2025
Odesa National Academy of Communications named O.S. Popov

LANGUAGES Bachelor's degree: Telecommunications 2012 - 2014

Vinnytsia Technical College
English - advanced
IT Systems and Network Maintenance
2008 - 2012
Finnish - pre-intermediate

Ukrainian - native