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Rostyslav Sikora
Fullstack Software Engineer | React, Node.js, Supabase
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Lisbon,PT
[open contact info](look above in the "contact info" section) | https://portfolio-rostyslav-
sikora.vercel.app/
Summary
Fullstack Software Engineer with 5 years of experience building scalable web/mobile apps using React, Svelte,
Node.js, TypeScript. I’ve worked with international teams across Europe, as well as Canada, the USA, and the UAE
primarily in the SaaS, Web3, AI, eCommerce, and iGaming sectors. Skilled in clean code, UI/UX design, and
mentoring in Agile environments, I’m eager to drive Bloq.it’s smart locker solutions with innovative, user-
focused systems.
Skills
• Frontend: React, React Native, Svelte, Next.js, Vite, Three.js, jQuery, Tailwind CSS, HTML5, SCSS
• Backend: Node.js (Express), Nest.js, TypeScript, Supabase, MySQL
• Tools: Git, Figma, Ai (Cursor, Claude, Claude Skills), User Flow, Expo, CI/CD, Unit Testing
• Practices: Agile/Scrum, Clean Code (SOLID), Continuous Deployment
• Soft Skills: Leadership, Problem-Solving, Collaboration, Mentoring
• Languages: English (C1), Ukrainian (Native), Russian (C2), Portuguese (A1)
Experience Dec2025-May2026
Fullstack Developer
Laki World, London, GB
• Automated SEO and operational workflows for an online casino platform.
• Built tools for keyword position tracking and SEO performance monitoring.
• Automated domain purchasing, SSL verification, and deployment processes.
• Set up automated website submission and indexing workflows for Google and Yandex.
• Developed scripts and internal tools to reduce manual SEO operations and improve workflow efficiency.
Fullstack Developer May2025-Nov2025
PayMore, Toronto, Canada
• Built a full stack platform for device trade in, resale, quotes, and order management
• Developed dynamic price estimation flows with device selection, condition logic, and form validation.
• Created admin tools for managing quotes, orders, inventory, and logistics.
• Implemented backend APIs connecting the website with internal operational systems.
• Optimized frontend performance and data handling for high volume multi location usage.
Fullstack Developer & Team Lead Jan2024–May2025
Prismatico, Lisbon, PT
• Founded and sold a video conferencing platform using React, Node.js, and AWS.
• Built MVP for 500+ testers, integrating Clerk/Stream for 30% better UX.
• Mentored 7 developers in Scrum, completing MVP 2 weeks early.
• Deployed CI/CD pipelines on AWS, enabling 50+ seamless updates.
• Secured €50,000 via BNB Smart Chain integration (Solidity).
Frontend Developer|UI/UX Designer Apr2023–Sep2023
4 Pillars Crypto App, Ljubljana, Slovenia
• Built React frontend with APIs, processing 1,000+ daily transactions.
• Designed UI/UX in Figma, increasing retention by 15%.
• Optimized user flows, cutting onboarding time by 10 minutes.
• Integrated blockchain features, ensuring secure data handling.

Technical Achievements
• Reduced app latency by 20% via Vite optimization in Prismatico projects.
• Scaled Discuzz Network to support 500+ concurrent users with AWS.
• Improved 4 Pillars user retention by 15% through UI/UX redesign.
• Streamlined Prismatico CI/CD pipeline, cutting deployment time by 25%.
Projects
• Laki World (https://www.laki.world/pt): iGaming platform
• Serenity Transfer (https://portfolio-rostyslav-sikora.vercel.app/serenity.html): Mobile app and CRM
• PayMore (https://paymore.ca/): Online platform and shop
Certifications
• Strategic Management, Heilbronn University
• AI for All: From Basics to GenAI Practice, Nvidia

Education
BSc in Management
ISCTE Instituto Universitário de Lisboa
BSc in International Relations
National University of Kyiv