# Tomasz Kowalczyk

> Backend Engineer (Go & PostgreSQL) from Poland at $90/hr. Rated 5.0/5 from 6 reviews. Go backends that stay boring under load: payment ledgers, event…

URL: https://freelance.adscaled.media/freelancers/tomasz-kowalczyk

Backend Engineer (Go & PostgreSQL) · $90/hr · Poland. Rated 5.0/5 from 6 reviews.

Go backends that stay boring under load: payment ledgers, event pipelines and APIs handling thousands of requests per second.

## Skills

Go, PostgreSQL, gRPC, Kafka, Redis, Docker, Kubernetes, System Design, REST APIs

## Portfolio

- [Public API and SDK for Metricflow](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/public-api-and-sdk-for-metricflow)
- [Webhook delivery platform for Hirewise](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/webhook-delivery-platform-for-hirewise)
- [Payment reconciliation service for Paycrest](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/payment-reconciliation-service-for-paycrest)
- [Database performance rescue for Stridewell](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/database-performance-rescue-for-stridewell)
- [Inventory sync engine for Brewline](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/inventory-sync-engine-for-brewline)
- [Monolith decomposition for Fielddesk](https://freelance.adscaled.media/freelancers/tomasz-kowalczyk/work/monolith-decomposition-for-fielddesk)

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