Rafał Warzocha

Experience

• 

  Freelancer

  Jun 2015 - Mar 2017

  Freelance Web Developer (PHP, Ruby, Frontend)

  Responsibilities included:- Creating websites/apps based on Wordpress / Zend Framework 2 / Symfony 2 / RoR 3, 4- Transforming designs to code with HTML5/CSS3/JavaScript

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  Netguru

  Mar 2017 - Sept 2020

  Responsibilities:- Improving the CI flow and preparing the project for Continuous Delivery (multiple deployments to production per day via Github Releases/CircleCI)- Defining the shape and functionality of cloud architecture (AWS)- Being in charge of DevOps activities - maintaining Graylog log entry shapes, monitoring the infrastructure (CloudWatch), profiling and optimizing the app (NewRelic, PGHero/pg_stat_statements)- Leading the project team while working on different features- Architecting small/medium scale distributed computing systems- Researching potential solutions to stated business problems- Ensuring the highest quality of provided solutions through good development practices- Mentoring junior team members- Building well-structured, standard-compliant APIs (REST and RPC) Show less

  • Senior Ruby on Rails Developer

    Sept 2018 - Sept 2020

  • Ruby on Rails developer

    May 2017 - Sept 2018

  • Junior Ruby on Rails developer

    Mar 2017 - May 2017
• 

  Fresha

  Oct 2020 - Jul 2021

  Backend Engineer

  - Ruby & Elixir development- Architecture planning and implementation- Building distributed systems with Kafka and gRPC- CI/CD improvements, including facilitation of domain ownership and error management- Provisioning Cloud resources & Datadog monitoring using IAC- Defined deployments using Kubernetes & Helm

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  Housecall Pro

  Aug 2021 - now

  - Technical leadership over the backend platform team consisting of senior/staff engineers- Providing architectural guidance to multiple teams- Driving across-the-stack initiatives, impacting majority of the engineering team- Seeking improvement areas, prioritizing and executing on selected ones- Mentoring Staff Engineers across the company- Strategic work on architectural roadmap--Highlight projects- Framework to manage Elasticsearch clusters, indices, reindexing process, A/B testing. Allowed rapid experimentation with zero downtime.- Implemented SAST & SCA processes and automations.- Improved observability with structured logging.- Improved the platform's reliability and security, in areas such as rate-limiting, authentication.- Designed key components of distributed architecture, as well as patterns that facilitate service extraction out of a monolithic codebase. Show less - Technical leadership of the backend platform team consisting of senior/staff engineers- Driving cross-cutting engineering initiatives across stacks and departments- Designing and Implementing tooling and process improvements related to error management, domain driven design, asynchronous domain-to-domain integration events- Enhancing developer experience by automating toil- Providing guidance to product squads related to domain driven design, decoupling existing modules, building/re-building solutions to scale- Working daily with different levels of IC and Managers, ranging from SE I to VP / SVP Show less

  • Senior Staff Software Engineer

    Jul 2023 - now

  • Staff Software Engineer

    Aug 2021 - Jul 2023