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Serhii Hrekov

Senior Python Developer
Remote Worldwide
Born: 1991
Status: Single

🧾 Summary​

Experienced backend software engineer with a strong commitment to writing clean and maintainable code, following Agile methodologies. Demonstrates excellent working and self-discipline ethic with a background in remote work, aiming to contribute to interesting projects and continue professional growth.

πŸ’Ό Experience​

nCube (Kiyv, Ukraine)​

Senior Software Engineer​

Modigie project (San Francisco, California, United States Β· Remote)
February 2025 – Present

  • building new services

Waylight (Delaware, US. Remote)​

Back end software engineer​

Apr 2023 – Jan 2025 (full time)
Jan 2025 – Present (part time)

  • Specialize in backend development using AWS for educational technology solutions.
  • Design and build high-performance APIs with FastAPI, Python 3, and asyncio.
  • Implement strong authorization and authentication for secure APIs and user data.
  • Use Jinja2 for dynamic content in email and Telegram notifications.
  • Set up automated email notifications with Amazon SES for better user engagement.
  • Proficient in Docker for streamlined application deployment.
  • Manage AWS Lambda, CodeBuild, CodePipeline, CloudWatch, CloudFormation, and System Manager.
  • Oversee RDS (PostgreSQL), Amazon SES, and Amazon SNS deployment and management.
  • Led the transition from synchronous to asynchronous/threading code for improved scalability.
  • Expert in creating and maintaining RESTful APIs for seamless communication.
  • Develop and maintain Telegram bot functionality for interactive communication and automation.
  • Integrate payment processors like Stripe and Fondy for secure transactions.
  • Conduct manual testing with Postman to ensure robust and functional APIs.
  • Integrate 3rd party API
  • Integrate payment gateway protocols and APIs (Stripe, Fondy)
  • Create managed telegram services (Paid subscriptions, users management on top of telegram members, etc)
  • Create and integrate user notification systems via telegram, email, whatsapp.
  • Integrate db caching features
  • Optimized code with threading

ProxiPago (Mexico, Mexico city. Remote)​

Lead full stack software engineer (Fintech startup)​

Apr 2022 – Jan 2025

As lead developer, I independently handled the entire project from start to finish.

Key Responsibilities and Achievements:

  • Led creation and management of cloud infrastructure on Google Cloud Platform (GCP).
  • Designed and implemented algorithms for financial transactions.
  • Developed APIs with Django Rest Framework for seamless communication.
  • Integrated 3rd party bank APIs for transaction processing.
  • Engineered user and client management resembling a CRM system.
  • Modeled and implemented a scalable database schema on Google Cloud Spanner.
  • Orchestrated requests to service providers and implemented robust response parsing.
  • Implemented various functionalities, including logging, PDF report generation, and QR code handling.
  • Utilized Git and GitHub for version control and collaborative development.
  • Managed Linux VPS for smooth operations.
  • Collaborated on the front-end using Django, Bootstrap, CSS, and JS.

Tech Stack:

  • Backend: Django (front-end and back-end), Django Rest API
  • Cloud Platform: Google Cloud Platform (Google App Engine, Cloud Spanner, Cloud Buckets, Cloud Scheduler)
  • Infrastructure: Ubuntu VPS (cloud VM)
  • Tools: Git, GitHub

This experience highlights my skills in cloud infrastructure, algorithm development, API design, and comprehensive application functionalities within the fintech domain, covering the entire development lifecycle.

πŸŽ“ Education​

Odessa National Polytechnic University, Odesa​

Master's degree, Information Technology​

2008 – 2013

I hold a master’s degree in Information Technologies, an alumnus of OdesΠ° Polytechnic National University. The Artificial Intelligence and Robotics Institute graduate (ONPU IKS), where I studied Computer Engineering and Specialised Computer Systems in Information Technologies and computer science fields.

🌐 Languages​

Ukrainian​

C1

English​

B2

πŸ” Interests​

  • startups
  • building saas
  • solo dev
  • indie hacking

πŸ“ž Contacts​