Kacper Perzankowski
Staff Engineer at Fresha
Warsaw, Masovian Voivodeship, Poland
Summary
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SeniorKacper Perzankowski is a seasoned software engineer and team lead with nine years of experience building highly available, distributed web systems and currently leading a product engineering team at Fresha to deliver a market-leading POS. He brings deep backend expertise across Elixir, Ruby, Postgres, Kafka and gRPC, combined with cloud-native ops using Kubernetes and Datadog to keep services reliable at scale. His career spans startup-to-scaleup environments, having architected booking and marketplace products, built a booking-SaaS at Overbooked, and worked on microservice platforms at Flip Fit and HTD. Comfortable wearing architect, tech-lead and hands-on engineer hats, he has repeatedly improved observability, fault tolerance and developer velocity. Based in Warsaw, he pairs pragmatic domain-driven design with event-driven systems thinking to solve booking and payments challenges. Peers describe him as a pragmatic builder who favors durable, operable systems over clever one-offs.
9 years of coding experience
12 years of employment as a software developer
English, German, Polish
Github Skills (133)
datetime10
css-loader10
backend10
search-server10
scalable10
elixir10
graph10
functional-programming10
server10
database9
rust9
compiler9
programming-language9
azure-functions9
infrastructure9
Programming languages (8)
Github contributions (5)
freshaengineering/grpc
Jun 2022 - Jul 2025
[gRPC] Elixir gRPC implementation (Fresha fork) - Unary/streaming RPC, TLS, interceptors, compression, connection backoff. | Elixir | protobuf-elixir
Contributions:1 review, 4 PRs, 1 push in 3 years 2 months
compressionelixirgrpcinterceptorprotobuf
overbooked-io/overbooked-js
Jan 2021 - Mar 2021
Javascript/Node.js library for the Overbooked API
Contributions:7 releases, 2 reviews, 29 commits in 1 month
javascriptnodejs-library
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