Krystian Wojcicki


Backend Developer

Hey, I am Krystian Wojcicki, an engineer at Amazon.

If you want to learn more about me check out my resume or my Linkedin

  • 2025
    • Built LLM and MCP powered workflows to diagnose and resolve automated on-call alerts, autonomously handling 100+ tickets with near 100% accuracy.
    • Developed an LLM powered reporting tool that helps 100+ managers quickly identify their employees' blockers and pain points, built using AWS Bedrock, Claude, and React
  • 2024
    • Developed the onboarding experience for an internal survey platform. Helping 2000+ Amazonians fulfill their survey needs
    • Expanded the survey distribution framework to include email. Delivering 100k+ surveys a month and thousands of emails for other use cases
  • 2023
    • Migrated Amazon's DAX Client from AWS SDK for JavaScript v2 to v3, reducing bundle size and deployment time by over 50% and led open sourcing the library, which is now utilized by 100's of other projects.
    • Architected and implemented a distributed employee search system using AWS Lambda, S3, DynamoDB, scaling up to 1,500 TPS with sub 50ms response time and driving $5m+ annual impact through retention improvement
    • Designed and implemented an automated birthday and "amaversary" reminder service using AWS Lambda, SQS, SES.
    • Expanded an internal employee recognition program to 50,000+ EU employees
  • 2022
    • Led the team's resilience initiatives, increasing system reliability over 10%, through migrating from CosmosDB Changefeed to Azure Service Bus.
    • Achieved a 10x increase in event-driven microservices processing capacity through architectural simplification and removal of obsolete components, enabling new customer onboarding.
    • Joined Amazon
  • 2021
    • Graduated and joined Microsoft :)
    • Developed critical features supporting a company wide SOX compliance initiative.
  • 2020
    • Spent some time studying Corona SDK and Godot for mobile game development
  • 2019, the year of internships
    • Amazon, Thinkbox
        Worked on some their artist tools (Krakatoa, Frost), in C++.
        Created a set of C++ tools around Krakatoa to reduce the artist's cost up to 20%
    • Scotiabank
      • Worked on PoC related to OpenFaaS, in addition (to privately) contributing to OpenFaaS.
      • Migrated an old C++ service to a Java Spring service with an Angular Frontend. Fully tested with Selenium + JUnit.
    • Nokia
        Created a Java based golden file testbed for the teams code generator.
        Created a regression framework utilizing Selenium/Javascript to fully automate the testing of the frontend.
        Fixed bugs along the way and added various features to their React based frontend + Java backend
  • 2018
      Finished up internship at Rockport and returned to school
  • 2017
    • Spent over a year interning at Rockport Networks, was nominated co-op of the year (for my school)
      • Worked on a Golang Microservices ranging from simple services querying Elasticsearch/Postgres to services implementing complex business logic
      • Responsible for the authentication service utilizing LDAP + JWT
      • Assisted with the transition to Kubernetes
      • Fixed several interesting bugs related to our Elasticsearch usage, inspired me to begin my blog with this first post
    • Participated and won the Junior Carleton Codeguru Contest, went and competed with the Carleton team at the ICPC North Eastern Qualifiers.
    • Participated in the first ever CUHacking. Developed an app called Pay Up, utilized Google Cloud OCR to assist in the sharing of bills
  • 2016
    • Spent several months working part time at Authentiky.
      • Built several PoC around XMPP servers and client side libraries
      • Deployed PoC's to Amazon EC2
    • 4 month internship at Sidense (Now Synopsys)
      • Developed software to assist the company in receiving its ISO 9001 Certification
      • Initial exposure to MVC, Postgres and Business Process Management Tools
  • 2015

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