Contact information

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You can get this candidate's contact information from https://www.work.ua/resumes/6569898/

Work experience

Back-end developer / Security specialist

from 11.2023 to 12.2024 (1 year 1 month)
Swan, Дистанційно (IT)

FTP

Food-tech project for restaurant business: management of online
orders, payments, in-house delivery and pickup, integration with
delivery services, table reservations (including external services),
support for POS systems, collection of statistics and feedback,
customizable website with online menus. The application worked in
12+ countries in Europe.

• Worked with microservices and high load.
•Optimized menu export from POS systems, making it 40%
faster
• Integrated POS systems to handle payments, fiscalization,
• Added updating of item statuses between POS system and
platform using WebSockets
• Developed export of invoices to XML, automating tax reporting
• Refactored and optimized the discount service, adjusting
discount application logic for POS systems.
• Made minor modifications to an existing Python-based bot.


Connection Point

Website for invitations to offline meetings. Basic functionality
creating custom invitation forms and adding users to "rooms",
making payments.
• Upgraded security to OWASP standards, adding CSP, CORS,
HTTP headers
• Obtained CASA Tier certification, which allowed for Google API
integration
• Database optimization by 30% due to load balancing and
connection pool configuration.
• Reduced CI/CD pipelines time by 15% by improving the release
process
• Researched and planned tasks and estimated timelines.
• Used security testing tools (ZAP, Burp Suite Professional)

Back-end developer / Team Lead

from 04.2021 to 09.2023 (2 years 5 months)
Jevera software solutions, Дистанційно (IT)

OKKO

Software for the operation of gas stations. Allows you to manage all points of the network.
Includes work with pump columns (gas, gasoline), with goods, with the kitchen, with self-service
terminals, etc.
• Worked with microservices and high load.
• Refactored the business logic by eliminating long SQL queries and reducing the load on
PostgreSQL
• Improved payment processing fault tolerance by implementing the Transactional Outbox
pattern.
• Integrated custom payment services.
• Worked with the kitchen and ordering service.


SEAD

SaaS solution for e-business. The functionality of the site allowed through a user-friendly interface
to create a custom api, data storage, processing and display structures for your business, automatic
data backup, custom graphs and charts.
• Acted as team leader, onboarding new members.
• Optimized code generation modules, reducing their work by 50%.
• Accelerated database performance by 40% by denormalizing key tables.
• Added data versioning, improving configuration management
• Solved key problems with a high degree of autonomy.

Full stack developer

from 07.2018 to 03.2021 (2 years 8 months)
АТ «Чернігівобленерго», Чернігів (Енергетика)

Main app

The company's main website. The site had to allow the provision of data and news about the
company's operations, application templates, and outage information for users.
• Developing an application on my own from scratch.
• Designed the architecture of the application and database.
• Developed a key power outage monitoring service that was used by the entire city.
• Successful development and went into production 20% faster than planned
• Integrated the company's internal services.


Internal applications

The company's internal applications for employees and consumers.
• Developed and maintained full-stack applications.
• Implemented data ingress gateway for external integrations.
• Worked with mailing lists and inbox parsers.
• Designed and developed application UI.

Education

НАЦІОНАЛЬНИЙ УНІВЕРСИТЕТ«ЧЕРНІГІВСЬКА ПОЛІТЕХНІКА»

ФЕІТ, Чернігів
Higher, from 2017 to 2021 (4 years)

Knowledge and skills

• Node.js
• Linux
• CMD
• JavaScript
• Git
• SQL
• MySQL
• TypeScript
• MongoDB
• PostgreSQL
• Docker
• Redis
• Apache Kafka
• Sequelize
• Express.js
• Docker Compose

Language proficiencies

• English — average
• Russian — fluent
• Ukrainian — fluent

Additional information

Резюме (EN) - https://drive.google.com/file/d/1v3RhjmjBni6vXFBaLobmovXlIZTWUCEU/view?usp=sharing