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- Age:
- 24 years
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- Lutsk
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Oleksandr Portianko
Full-Stack Software Engineer | React, Next.js, TypeScript, Node.js, Python
[open contact info ](look above in the "contact info" section) [open contact info ](look above in the "contact info" section) Lutsk, Ukraine
[open contact info ](look above in the "contact info" section) github.com/oleksandrportianko
Summary
Software Engineer with 4+ years of commercial experience in frontend and full-stack development, specializing in
React, Next.js, TypeScript, Node.js, and Python. Contributed to and delivered 20+ projects across SaaS, mobile
applications, e-commerce, logistics, AI tools, and data visualization. Experienced in building complex business
workflows and AI-powered features, integrating multiple AI and LLM providers, payment and subscription
systems, analytics, attribution tools, and third-party APIs. I have also worked as a Tech Lead, taking ownership of
architecture, technical decisions, code reviews, development coordination, and production releases. Focused on
delivering scalable, reliable, and user-friendly products.
Professional Experience
Technical Lead, SP-Lutsk 01/2026 – 06/2026
•Coordinated development work, technical decisions, code reviews, and release Lutsk, Ukraine
planning.
•Communicated with stakeholders and helped define implementation priorities.
•Oversaw features from planning and architecture to deployment and production
release.
•Continued contributing hands-on as a Full-Stack Developer.
Full-Stack Developer, SP-Lutsk 01/2025 – 01/2026
•Built SaaS products, APIs, and backend services using React, Next.js, TypeScript, Lutsk, Ukraine
Node.js, and Python.
•Developed AI – powered features and integrated multiple AI, payment, analytics, and
third-party services.
•Worked with authentication, subscriptions, databases, cloud services, and production
monitoring.
•Improved application performance, stability, and scalability.
Frontend Developer, SP-Lutsk 12/2021 – 01/2025
•Developed responsive web applications and reusable interfaces with React, Next.js, Lutsk, Ukraine
JavaScript, and TypeScript.
•Built dashboards, forms, editors, tables, and data – visualization features.
•Integrated REST APIs, authentication, payments, analytics, and cloud services.
•Improved usability, performance, and cross-browser compatibility.
Education
Master’s Degree in Computer Engineering, Lutsk National Technical University 09/2022 – 12/2023
Lutsk, Ukraine
Bachelor’s Degree in Computer Engineering, Lutsk National Technical University 09/2018 – 06/2022
Lutsk, Ukraine
Skills
React, Next.js, TypeScript React Native, Expo
Node.js, Python REST APIs & Third-Party Integrations
AI & LLM Integrations Databases & Cloud Services
System Architecture Technical Leadership
Team Collaboration Stakeholder Communication
Code Review Problem Solving
Languages
Ukrainian English
Native Upper-Intermediate (B2)
Projects
CoinZecca , AI-Powered Coin Identification Mobile App 05/2026 – 06/2026
Improved and production-hardened an AI-powered React Native application for coin
identification. Worked on subscription and trial flows, analytics, attribution, consent,
production monitoring, and iOS and Android release management.
JustHeadshots , AI Headshot Generation Platform 05/2024 – 06/2026
Developed an AI-powered platform for generating professional headshots from user-
uploaded images. Built image upload and customization workflows, integrated AI
generation services, and improved reliability and usability across the generation
process.
QRCodeveloper , Dynamic QR Code SaaS Platform 05/2023 – 06/2026
Developed and maintained a SaaS platform for creating and managing dynamic QR
codes. Built complex editors, file-based QR workflows, analytics, scan tracking, and
third-party integrations. Contributed to a product serving 800,000+ users and
processing over 6 million scans.
CloudOrder , E-commerce and Order Management SaaS 01/2022 – 06/2026
Developed and maintained a cloud-based platform for order, inventory, customer, and
fulfillment management. Built complex React interfaces, backend integrations, real-time
notifications, and operational dashboards, helping automate business workflows.
Full-Stack Software Engineer | React, Next.js, TypeScript, Node.js, Python
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Summary
Software Engineer with 4+ years of commercial experience in frontend and full-stack development, specializing in
React, Next.js, TypeScript, Node.js, and Python. Contributed to and delivered 20+ projects across SaaS, mobile
applications, e-commerce, logistics, AI tools, and data visualization. Experienced in building complex business
workflows and AI-powered features, integrating multiple AI and LLM providers, payment and subscription
systems, analytics, attribution tools, and third-party APIs. I have also worked as a Tech Lead, taking ownership of
architecture, technical decisions, code reviews, development coordination, and production releases. Focused on
delivering scalable, reliable, and user-friendly products.
Professional Experience
Technical Lead, SP-Lutsk 01/2026 – 06/2026
•Coordinated development work, technical decisions, code reviews, and release Lutsk, Ukraine
planning.
•Communicated with stakeholders and helped define implementation priorities.
•Oversaw features from planning and architecture to deployment and production
release.
•Continued contributing hands-on as a Full-Stack Developer.
Full-Stack Developer, SP-Lutsk 01/2025 – 01/2026
•Built SaaS products, APIs, and backend services using React, Next.js, TypeScript, Lutsk, Ukraine
Node.js, and Python.
•Developed AI – powered features and integrated multiple AI, payment, analytics, and
third-party services.
•Worked with authentication, subscriptions, databases, cloud services, and production
monitoring.
•Improved application performance, stability, and scalability.
Frontend Developer, SP-Lutsk 12/2021 – 01/2025
•Developed responsive web applications and reusable interfaces with React, Next.js, Lutsk, Ukraine
JavaScript, and TypeScript.
•Built dashboards, forms, editors, tables, and data – visualization features.
•Integrated REST APIs, authentication, payments, analytics, and cloud services.
•Improved usability, performance, and cross-browser compatibility.
Education
Master’s Degree in Computer Engineering, Lutsk National Technical University 09/2022 – 12/2023
Lutsk, Ukraine
Bachelor’s Degree in Computer Engineering, Lutsk National Technical University 09/2018 – 06/2022
Lutsk, Ukraine
Skills
React, Next.js, TypeScript React Native, Expo
Node.js, Python REST APIs & Third-Party Integrations
AI & LLM Integrations Databases & Cloud Services
System Architecture Technical Leadership
Team Collaboration Stakeholder Communication
Code Review Problem Solving
Languages
Ukrainian English
Native Upper-Intermediate (B2)
Projects
CoinZecca , AI-Powered Coin Identification Mobile App 05/2026 – 06/2026
Improved and production-hardened an AI-powered React Native application for coin
identification. Worked on subscription and trial flows, analytics, attribution, consent,
production monitoring, and iOS and Android release management.
JustHeadshots , AI Headshot Generation Platform 05/2024 – 06/2026
Developed an AI-powered platform for generating professional headshots from user-
uploaded images. Built image upload and customization workflows, integrated AI
generation services, and improved reliability and usability across the generation
process.
QRCodeveloper , Dynamic QR Code SaaS Platform 05/2023 – 06/2026
Developed and maintained a SaaS platform for creating and managing dynamic QR
codes. Built complex editors, file-based QR workflows, analytics, scan tracking, and
third-party integrations. Contributed to a product serving 800,000+ users and
processing over 6 million scans.
CloudOrder , E-commerce and Order Management SaaS 01/2022 – 06/2026
Developed and maintained a cloud-based platform for order, inventory, customer, and
fulfillment management. Built complex React interfaces, backend integrations, real-time
notifications, and operational dashboards, helping automate business workflows.
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The candidate's resume is posted at https://www.work.ua/resumes/19369899/