Open to opportunities

Aleksndr Sheikin

@aleksndrsheikin

Message

I build production Python backend services, APIs, and payment risk systems.

Israel

Message

What I'm looking for

I'm looking to build and run production backend services in a remote, distributed team, with ownership from design through delivery. I value API design, reliable integrations, asynchronous systems, and close collaboration with frontend and QA.

At Combo Cards, I built AML screening and a multi-level anti-fraud system for card issuing from empty repositories through production. I develop FastAPI services, asynchronous workflows with Celery and RabbitMQ, and resilient integrations with external risk and payment providers.

Previously at AdCombo, I built and owned around eight backend services with 99.9%+ uptime, delivered 20+ external integrations, and reduced a slow endpoint from 15–30 seconds to 2–3. I work closely with frontend and QA on API contracts, production delivery, and mentoring backend engineers across Docker, Kubernetes, CI/CD, PostgreSQL, and distributed remote teams.

Experience

Work history, roles, and key accomplishments

Current

Python Backend Developer

Current

Combo Cards

Sep 2025 - Present (11 months)

Built AML screening from an empty repository through to production, including design, asynchronous integration with an external risk provider, alerting, and tests. Designed and built a multi-level anti-fraud system for card issuing from scratch, with configurable rule levels and automatic blocking.

Python fastAPI Celery RabbitMQ PostgreSQL Docker Kubernetes CI CD Retries

Python Backend Developer

AdCombo

Mar 2021 - Sep 2025 (4 years 6 months)

Developed and deployed around 8 backend services from scratch and owned them afterwards, at 99.9%+ uptime. Designed and implemented REST APIs and more than 20 integrations with external platforms, working with frontend developers on API contracts.