Kamil Jaworski

.NET Software Engineer

I build reliable, scalable backend systems with .NET and cloud technologies.

About

I'm a Software Engineer with 7 years of professional experience, specialising in backend development with .NET and C#. I enjoy designing and building distributed, cloud-native systems - from microservices to event-driven architectures.

Over the course of my career I have worked on large-scale platforms in the travel and e-commerce industries, contributed to cloud migrations on both Azure and AWS, and at one point led a team of 8 engineers while remaining hands-on as a developer. I care deeply about code quality, testability, and building systems that are both reliable and maintainable.

When I'm not at the keyboard, I'm usually exploring new technologies, tinkering with side projects, or enjoying the outdoors.

Experience

  1. Oct 2022 - Present

    Software Engineer · Software Mind

    Kraków / Remote

    • Working on a large-scale travel booking platform used by thousands of agents across 6 countries, consisting of 100+ microservices in a hybrid on-premises and AWS environment
    • Developed and maintained distributed microservices; refactored legacy on-prem services into cloud-native services deployed on AWS
    • Implemented asynchronous messaging with MassTransit and AWS SQS/SNS
    • Designed and built an event-driven email delivery platform: scheduling, templating, dispatching, tracking integrations, and analytics processing
    • Built a centralised asset storage and retrieval service integrated with multiple distributed services
    • Wrote comprehensive unit and integration tests including full integration testing with LocalStack and Docker
    • .NET 8
    • .NET Framework 4.8
    • C#
    • MongoDB
    • SQL Server
    • Redis
    • Docker
    • AWS SQS/SNS
    • AWS ECS
    • AWS S3
    • AWS Lambda
    • EventBridge
    • Terraform
    • MassTransit
    • CQRS
    • xUnit
    • Angular
    • TypeScript
  2. Aug 2022 - Sep 2022

    Software Engineer · Software Mind

    Remote

    • Joined to support the migration of on-premise services to Microsoft Azure for a financial company
    • Developed Azure Functions to support new cloud-based features and implemented API endpoints using serverless architecture
    • Supported feature flag mechanisms and adapted legacy components to cloud-native patterns
    • .NET
    • C#
    • Azure Functions
    • Microsoft Azure
  3. Oct 2021 - Jul 2022

    Senior .NET Developer · Onex Group

    Częstochowa / Hybrid

    • Contributed to the development and maintenance of one of the largest Student Information Systems in Poland, serving approximately 40 universities
    • Delivered new features across a WinForms desktop application, WebForms student portal, and WCF backend services
    • Refactored legacy code, optimised database queries, and improved overall platform performance and stability
    • .NET Framework
    • C#
    • WinForms
    • DevExpress
    • WebForms
    • Telerik
    • WCF
    • MS SQL Server
  4. Jan 2021 - Sep 2021

    .NET Developer & Team Leader · Onex Group

    Częstochowa / Hybrid

    • Promoted to Team Leader for a microservices-based e-commerce platform operating in 5 European markets, leading a Scrum team of 8 engineers
    • Led and facilitated all Scrum ceremonies; managed and prioritised the product backlog with the Product Team
    • Coordinated the successful production launch of the new platform, resolving critical issues and overseeing data migrations
    • Continued active backend development on payment, order, and integration services
    • .NET 5
    • ASP.NET
    • REST API
    • Entity Framework
    • MS SQL Server
    • Azure Service Bus
    • Azure Functions
    • Azure App Service
  5. Jan 2020 - Dec 2020

    .NET Developer · Onex Group

    Częstochowa

    • Contributed to building a new microservices-based e-commerce platform from scratch to replace a legacy system, operating in 5 European markets
    • Designed and implemented microservices for search, orders, and payments - including integrations with PayPal and PayU (BLIK one-click payments)
    • Implemented asynchronous communication between services using Azure Service Bus
    • Supported cloud deployment and architecture on Microsoft Azure
    • .NET 5
    • ASP.NET
    • REST API
    • Entity Framework
    • MS SQL Server
    • Azure Service Bus
    • Azure Functions
    • Azure App Service
    • Angular
    • JavaScript
  6. Jul 2019 - Dec 2019

    .NET Developer · Onex Group

    Częstochowa

    • Worked on a back-office system supporting an e-commerce platform selling software and hardware products
    • Developed new features (orders, product catalogue, pricing, invoicing) and maintained existing modules
    • Investigated and resolved production issues; implemented and consumed REST APIs for system integrations
    • .NET Framework 4.8
    • ASP.NET MVC
    • C#
    • MS SQL Server
    • Entity Framework
    • REST API
    • JavaScript
    • jQuery
View full profile on LinkedIn

Certificates

  1. AWS Certified Cloud Practitioner

    Amazon Web Services (AWS)

    Nov 2023 - Nov 2026

    Verify

  2. Professional Scrum Master I (PSM I)

    Scrum.org

    Jun 2021

    Verify

  3. First Certificate in English (FCE B2)

    Cambridge University Press & Assessment

    Jan 2024

Skills

Languages

  • C#
  • TypeScript
  • JavaScript
  • SQL

Frameworks & Libraries

  • .NET 8
  • ASP.NET Core
  • Entity Framework
  • MassTransit
  • xUnit
  • Angular

Cloud & Infrastructure

  • AWS
  • Microsoft Azure
  • Docker
  • Terraform
  • Azure Service Bus
  • AWS SQS/SNS

Databases

  • SQL Server
  • MongoDB
  • Redis

Methodologies & Tools

  • Microservices
  • CQRS
  • REST API
  • Scrum
  • Git
  • Jira

IDEs & Dev Tools

  • JetBrains Rider
  • Visual Studio
  • Visual Studio Code
  • Cursor
  • SQL Server Management Studio

AI Tools

  • Claude
  • GitHub Copilot
  • OpenAI Codex
  • Cursor AI

Contact

Have a question or want to work together? Feel free to reach out.