zachross90210

Over the past several years, I’ve worked full-time in multiple startups where I played a key role in developing and scaling products from the ground up. I began by building a data aggregation system focused on cryptocurrency markets - collecting, normalizing, and structuring large volumes of data used to attract investors. After securing investor interest, I joined the next project - a platform that allowed users to host mining equipment abroad at better rates. I took ownership of deployment optimization, migrating from manual setups to a fully automated pipeline. On the frontend, I integrated React, while focusing primarily on backend architecture and process efficiency. My work often involved leading small teams, coordinating tight deadlines, and ensuring stable, production-grade releases under startup pressure.

Experience: 11 years

Yearly salary: $80,000

Hourly rate: $50

Nationality: 🇺🇦 Ukraine

Residency: 🇺🇦 Ukraine


Experience

AI Integration Engineer
Freelance (Remote)
2024 - 2025
Designed and deployed RAG pipelines using LangChain, Pinecone. Integrated GPT-4 and Llama 2 into enterprise search systems, implementing caching + fallback mechanisms. Developed scalable REST APIs (Python/FastAPI, Node.js/Express) on AWS (ECS, Lambda, S3, DynamoDB), enabling seamless integration with client-facing apps.
Senior Backend Developer
Compass Mining (Remote)
2021 - 2024
Led a distributed team of 6 developers, establishing code review processes, sprint planning. Architected and implemented microservices in Node.js and Python, deployed on AWS (ECS, Lambda, S3). Optimized PostgreSQL performance with advanced indexing, partitioning, and query refactoring.
Full Stack Developer
Fintech SaaS Startup (Remote)
2020 - 2020
Built and deployed client-facing SaaS applications with React (frontend) and Node.js/Express (backend). Implemented automated testing pipelines with raising code coverage to 85%. Collaborated directly with stakeholders to translate requirements into shipped features, delivering product iterations in 2-week sprints.
Software Engineer
E-commerce Platform (Remote)
2017 - 2020
Designed and scaled RESTful APIs in Python/Django, implementing authentication, rate limiting, and monitoring with AWS CloudWatch. Developed real-time data processing pipelines using RabbitMQ + Celery to handle millions of daily events, powering analytics dashboards and alerting systems. Led the migration from a monolithic Django app to a microservices architecture in AWS Ecosystem.
Python Backend Engineer
Remote Analytics Company (Remote)
2015 - 2017
Designed and deployed RESTful APIs with Flask, integrating PostgreSQL and Redis. Implemented authentication and role-based access control using JWT and OAuth2, securing sensitive endpoints and ensuring compliance with industry standards. Developed a background task system with Celery + Redis, enabling asynchronous processing of high-volume jobs (report generation, data ingestion) with improved throughput.
Django Backend Engineer
Full-time Contract (Remote)
2013 - 2015
Developed and scaled RESTful APIs in Django + DRF, supporting real-time analytics and data ingestion pipelines. Implemented asynchronous task processing with Celery + Redis, enabling high-throughput workloads (file ingestion, report generation, email delivery) and reducing API latency under load. Integrated secure authentication and authorization with JWT + Google OAuth2, providing single sign-on for multiple client applications.

Skills

angular
node
nosql
react
rust
solana
sql
python
english