Александр

Oleksandr Hryhorenko
Fullstask Developer
Experienced Fullstack Developer with 5+ years of expertise in building scalable, high-performance
web applications. Proficient in modern frontend and backend technologies, including React,
Angular, Node.js, and Docker. Strong background in API development, system optimization, and
team leadership. Proven track record of delivering innovative solutions in fast-paced environments

Experience
Fullstack Developer – 24sju, Sweden (04/2024 – 11/2024)
Built backend services using Node.js and integrated APIs with Swagger.
Contact
Optimized payment systems in kiosks, resolving duplicate transactions.
Phone: [open contact info](look above in the "contact info" section) Developed audio management solutions on Raspberry Pi and store scales.
Email: [open contact info](look above in the "contact info" section) Achievements:
Linkedin: Hryhorenko Oleksandr Migrated and optimized statistical data pipelines to AWS for scalability.
Telegram: AH1UA Enhanced customer experience by synchronizing audio playback in 50+ stores.
Successfully resolved payment system issues, eliminating duplicate transactions.
Location
Fullstack Developer – Yolo, Dubai (02/2024 – 09/2024)
Address: Poland Gdansk
Created corporate websites and user accounts using Next.js and Strapi.
Migrated databases from SQLite to PostgreSQL.
Education Built a Flutter app with localization and real-time property updates.
Achievements
IP STEP Academy 2015 - 2018
Software development Reduced page load times by 30% with optimized SSR.
Increased user engagement by 40% through robust platform delivery.
Dnepropetrovsk Academy of Construction
Expanded technical skills with advanced localization and Flutter integration.
and Architecture 2011-2015
Industrial and civil engineering Team Lead – 24sju, Poland (03/2022 – 03/2024)
Led the development of self-checkout kiosks with Angular and Electron.
Expertise Migrated monolithic systems to AWS with Docker and RabbitMQ.
HTML, CSS, SCSS, SASS, LESS, BEM Scaled infrastructure with Nginx, supporting 100+ stores.
Javascript, Typescript Achievements
React, Angular, NextJS(ssr), Electron, Managed and mentored a team of 6 developers, improving team efficiency.
NodeJS, express, Redux, Redux Toolkit, Increased server capacity by 300% with optimized load balancing.
Flutter, dart Reduced issue resolution time by 40% using real-time Telegram notifications.

Docker, NGINX, bash, ssh, aws, swagger, Frontend Developer – Secret Cloud (12/2021 – 02/2022)
RabitMQ
Developed secure file-sharing systems with React and Redux.
MongoDB, Postgres, SQL, Prisma, Contributed to government projects on data exchange and UI optimization.
TypeORM, Strapi Achievements:
http, https, Socket.io, ssh Delivered a secure and efficient file management system with drag-and-drop
functionality.
Bootstrap, MaterialUI, PrimeNG,
Improved application performance, enhancing user experience across
Tailwind
organizations.
Figma, xd.adobe
Frontend Instructor – IT STEP (09/2020 – 01/2022)
Git, GitLab, BitBucket
Taught HTML, CSS, React, and Angular to students aged 16-80, graduating 6+ groups.
Jira, Git Issue Boards, KanbanFlow
Achievements:
Pax Terminal, Printer API, Scale Api, Successfully trained and mentored students, building a strong foundation for their
Electronic Price Tag API, Scanner careers.
Team Leadership, Problem Solving, Agile Developed a structured curriculum balancing theory and hands-on practice.

Junior+ Fullstack Developer – Trade, Ukraine (05/2020 – 11/2021)
Developed internal CRM systems with React and MySQL.
Automated order processes and optimized data migrations.
Language Promoted to team leader, managing two developers.
Achievements:
Ukranian: Fluent Promoted to team leader, managing two developers.
English: Intermediate (B1) Migrated large datasets from Excel to MySQL, improving system reliability.

Details
FULL CV THERE:
https://ah911ua.github.io/ah911ua/