Ukraine's #1 job service
Олексій
Software Engineer
- Age:
- 24 years
- City of residence:
- Kharkiv
- Ready to work:
- Remote
Contact information
The job seeker has provided: Phone number
Name, contacts and photo are only available to registered employers. To access the candidates' personal information, log in as an employer or sign up.
You can get this candidate's contact information from https://www.work.ua/resumes/9859987/
Uploaded file
Quick view
version
This resume is posted as a file. The quick view option may be worse than the original resume.
Oleksii Chalenko
Software Engineer
[open contact info ](look above in the "contact info" section) [open contact info ](look above in the "contact info" section) Kharkiv, Ukraine
ochaoo Oleksii Chalenko AlfABeT_Qui
About Me
Backend-focused Full-stack Developer with 3+ years of commercial experience building secure,
integration-heavy web applications. Specialize in TypeScript, Node.js, NestJS, and React, with
hands-on experience in PostgreSQL, Redis, payment integrations, authentication, asynchronous
processing, and REST APIs. Focused on reliable systems, clean architecture, and maintainable
code.
Professional Experience
Confidential Client Projects (NDA) 09/2025 – Present
Backend / Full Stack Developer Remote
● Developed backend services and REST APIs using TypeScript, Node.js, NestJS, PostgreSQL,
Redis, Docker, and AWS services.
● Implemented reliable external API and webhook workflows with signature validation,
idempotency, retries, background processing, and audit-friendly state transitions.
● Integrated Stripe payment workflows and implemented TOTP-based two-factor
authentication compatible with Google Authenticator.
● Developed backend modules for a Telegram gaming platform using NestJS, Prisma,
PostgreSQL, and Redis, including matchmaking, background workers, player progression,
in-app purchases, and signed payment callbacks.
● Created and maintained database schemas, migrations, API documentation, automated
tests, and local development environments.
Advocate Association “Zahist” 09/2022 – 09/2025
Full Stack Developer Remote
● Designed and implemented RESTful APIs with Node.js/Express, ensuring secure
authentication and scalable architecture.
● Integrated OpenAI assistant to enhance user interaction and automate parts of
the workflow.
● Optimized database queries in MongoDB to improve performance and reduce
response time.
● Built dynamic user interfaces with React and managed state using Redux Toolkit.
Skills
Backend: Node.js, NestJS, Express, TypeScript, REST APIs, Webhooks
Databases: PostgreSQL, MySQL, MongoDB, Prisma, TypeORM, Sequelize, Mongoose
Async & Infrastructure: Redis, BullMQ, Docker, AWS, Git
Security & Payments: JWT, Refresh Tokens, TOTP / Google Authenticator, Stripe, Tap
Quality & Documentation: Jest, Swagger / OpenAPI, Postman, Sentry
Frontend: React, Redux Toolkit, Tailwind CSS, Ant Design
Education
Kharkiv National University of Radio Electronics
Bachelor degree, Software Engineering Master's degree, Computer Science
2019-2023 2023-2025
Software Engineer
[
ochaoo Oleksii Chalenko AlfABeT_Qui
About Me
Backend-focused Full-stack Developer with 3+ years of commercial experience building secure,
integration-heavy web applications. Specialize in TypeScript, Node.js, NestJS, and React, with
hands-on experience in PostgreSQL, Redis, payment integrations, authentication, asynchronous
processing, and REST APIs. Focused on reliable systems, clean architecture, and maintainable
code.
Professional Experience
Confidential Client Projects (NDA) 09/2025 – Present
Backend / Full Stack Developer Remote
● Developed backend services and REST APIs using TypeScript, Node.js, NestJS, PostgreSQL,
Redis, Docker, and AWS services.
● Implemented reliable external API and webhook workflows with signature validation,
idempotency, retries, background processing, and audit-friendly state transitions.
● Integrated Stripe payment workflows and implemented TOTP-based two-factor
authentication compatible with Google Authenticator.
● Developed backend modules for a Telegram gaming platform using NestJS, Prisma,
PostgreSQL, and Redis, including matchmaking, background workers, player progression,
in-app purchases, and signed payment callbacks.
● Created and maintained database schemas, migrations, API documentation, automated
tests, and local development environments.
Advocate Association “Zahist” 09/2022 – 09/2025
Full Stack Developer Remote
● Designed and implemented RESTful APIs with Node.js/Express, ensuring secure
authentication and scalable architecture.
● Integrated OpenAI assistant to enhance user interaction and automate parts of
the workflow.
● Optimized database queries in MongoDB to improve performance and reduce
response time.
● Built dynamic user interfaces with React and managed state using Redux Toolkit.
Skills
Backend: Node.js, NestJS, Express, TypeScript, REST APIs, Webhooks
Databases: PostgreSQL, MySQL, MongoDB, Prisma, TypeORM, Sequelize, Mongoose
Async & Infrastructure: Redis, BullMQ, Docker, AWS, Git
Security & Payments: JWT, Refresh Tokens, TOTP / Google Authenticator, Stripe, Tap
Quality & Documentation: Jest, Swagger / OpenAPI, Postman, Sentry
Frontend: React, Redux Toolkit, Tailwind CSS, Ant Design
Education
Kharkiv National University of Radio Electronics
Bachelor degree, Software Engineering Master's degree, Computer Science
2019-2023 2023-2025
Similar candidates
-
Backend, PHP Developer
40000 UAH, Remote, Mykolaiv -
Програміст PHP
Remote, Kyiv, Other countries -
Python-програміст
Remote, Lviv -
1C developer
Remote, Khmelnytskyi -
Python-програміст
Remote -
Senior Front-End Developer (TypeScript, React)
140000 UAH, Remote, Dnipro
The candidate's resume is posted at https://www.work.ua/resumes/9859987/