Open to opportunities

Levi Kassem

@levikassem

Full Stack Engineer building secure, scalable data and SaaS platforms, from analytics pipelines to production-grade systems.

Colombia

Message

What I'm looking for

I’m looking for a role where I can own production systems end-to-end—building secure analytics, reliable pipelines, and SaaS features that scale, with room to iterate fast and ship.

I’m a Full Stack Engineer focused on turning complex data and product requirements into reliable, secure systems. At Qrvey Analytics, I led the migration of analytics storage from Elasticsearch to ClickHouse, added a storage-abstraction layer, and built row-level security for live database queries.

I’ve also delivered end-to-end platform work at SAP, deploying and maintaining a Node.js application and HANA database on SAP BTP Cloud with high availability for an expected 3000 concurrent users. I automated content upload using Python, reducing a 7-day process to minutes.

Earlier, at Smartrader, I integrated the Kraken crypto exchange end to end—building backend and API connections so automated strategies could execute against a live exchange. I also ran and analyzed machine-learning backtests on historical market data to validate strategies before shipping.

As a Founder & Software Engineer, I built Droppo into a paid SaaS by launching subscription billing on MercadoPago and creating plan-gated tiers with prorated upgrades. I automated supplier selection with an LLM pipeline and re-architected background jobs into fast/slow queues with self-healing workers to prevent long, silent failures.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

Qrvey Analytics

Mar 2025 - Present (1 year 4 months)

Led migration of analytics data storage from Elasticsearch to ClickHouse, enabling a storage abstraction layer for the ingestion pipeline. Designed row-level security for live database queries and built a schema change-detection system to safely manage dataset updates.

PostgreSQL Elasticsearch Clickhouse RabbitMQ Docker Kubernetes AWS Azure Storage Abstraction Layer Data Ingestion Schema Change Detection

Current

Founder & Software Engineer

Current

Droppo

Apr 2020 - Present (6 years 3 months)

Built an automation dropshipping platform and evolved it into a paid SaaS by launching subscription billing and plan-gated tiers with automated upgrade/downgrade lifecycle. Cut product selection time 90% by automating supplier data retrieval and using an LLM pipeline to generate marketplace-ready listings.

Ubuntu MySQL Docker Flask Celery JavaScript PostHog RabbitMQ Redis MercadoPago Checkout Pro Server Side Recurring Charges Self Healing Workers Automated Restarts

Full Stack Developer

SAP

Jul 2023 - Mar 2025 (1 year 8 months)

Deployed and maintained a Node.js application and HANA database on SAP BTP Cloud for high availability with an expected 3000 concurrent users, supporting a successful product launch. Automated content upload processes with Python, reducing upload time from 7 days to minutes.

Python SQL Node SAP BTP Hana High Availability Content Automation

Full Stack Developer

Smartrader

Mar 2022 - Dec 2022 (9 months)

Integrated the Kraken crypto exchange end to end by building backend and API connections to enable live execution of users' automated trading strategies. Ran and analyzed machine-learning backtests over historical data to validate and ship profitable strategies.

Docker Flask Vue.Js Machine Learning AWS Kraken API Strategy Back Tests