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Hi, I am Eryk

Eryk Ignatowski

Software Engineer

I am a passionate .NET Software Engineer with 5 years of hands-on experience in building scalable backend systems and web applications. I specialize in C#, ASP.NET, and Entity Framework, and I’ve worked on microservice-based systems integrated with various databases and cloud services. I enjoy solving real-world problems through clean architecture and robust code. Outside of work, I occasionally explore side projects, including Blazor-based and fullstack applications.

Passion
Ownership
Team player
Problem solving
Adaptability
Continuous learner

Skills

.NET / C#
.NET / C#

Commercial experience with .NET Framework and .NET Core/5+. Built scalable REST/SOAP APIs, microservices, and enterprise-grade applications using ASP.NET, Entity Framework, and Blazor.

XUnit
XUnit

Developed unit, integration, and system tests in .NET using xUnit and FluentAssertions to ensure code reliability and maintainability.

CQRS / MediatR

Implemented CQRS architecture with MediatR in .NET solutions for improved scalability, decoupling, and maintainability.

DDD (Domain-Driven Design)

Applied Domain-Driven Design principles to design clean, modular, and business-focused architectures in microservice environments.

SQL Server / PostgreSQL / MongoDB
SQL Server / PostgreSQL / MongoDB

Worked with both relational and NoSQL databases including SQL Server, PostgreSQL, MySQL, MongoDB, and CosmosDB for data modeling, performance tuning, and migrations.

Docker
Docker

Containerized .NET and Node.js applications using Docker. Experience with multi-stage builds, Docker Compose, and image optimization.

Kubernetes
Kubernetes

Deployed and managed microservices on Kubernetes clusters. Familiar with Helm charts, custom CRDs, autoscaling, and resource management.

Azure Functions
Azure Functions

Built serverless applications with Azure Functions. Integrated with Event Grid, Service Bus, and other Azure-native services.

Redis
Redis

Implemented distributed caching with Redis to improve performance and reduce database load in high-throughput .NET applications. Experience with expiration policies, pub/sub, and persistence strategies.

RabbitMQ
RabbitMQ

Used RabbitMQ for building event-driven architectures and asynchronous communication between microservices. Experience with queue configuration, exchanges, dead-lettering, and consumer patterns.

Azure Service Bus
Azure Service Bus

Integrated Azure Service Bus for reliable messaging between distributed .NET services. Experience with queues, topics, subscriptions, dead-lettering, and message retry strategies.

Git / Azure DevOps / Bitbucket
Git / Azure DevOps / Bitbucket

Used Git in collaborative workflows. Set up and maintained CI/CD pipelines with Azure DevOps and Bitbucket Pipelines.

Grafana / Splunk
Grafana / Splunk

Configured monitoring and observability dashboards with Grafana and Splunk. Integrated .NET services for log aggregation and alerting.

Angular
Angular

Built responsive frontends using Angular. Worked with TypeScript, HTML, and CSS, integrated with REST APIs and .NET backends.

Blazor
Blazor

Developed interactive web UIs using Blazor WebAssembly and Blazor Server. Integrated with .NET APIs and shared domain models.

Node.js
Node.js

Developed lightweight backend services and CLI tools using Node.js. Familiar with Express and ecosystem utilities.

ASP.NET
ASP.NET

Developed robust RESTful APIs, microservices, and fullstack web apps using ASP.NET Core and ASP.NET MVC. Experience with middleware, authentication, Entity Framework integration, and clean architectural layering.

Prometheus
Prometheus

Integrated Prometheus with .NET microservices for metrics collection and monitoring. Experience with PromQL, AlertManager, and custom exporters.

Experiences

1
Accenture/Avanade

Mar 2023 - Present

Remote

Accenture/Avanade delivers innovative digital and cloud services for enterprise clients, leveraging Microsoft technologies.

.NET Team Leader – E-commerce solution for mBank

Sep 2023 - Present

Responsibilities:
  • Led a team of 3 developers, handled sprint planning, backlog grooming, and technical oversight.
  • Designed and developed scalable APIs using .NET 6–8 for a high-traffic mobile commerce platform.
  • Implemented CI/CD pipelines with Azure DevOps and Bitbucket for automated delivery.
  • Built and maintained microservices following clean architecture principles.
  • Ensured high test coverage through unit, integration, contract, and E2E testing.
Backend Software Engineer – Nursing Mobile App

Mar 2023 - Aug 2024

Responsibilities:
  • Developed modular backend services in .NET 8, hosted in Azure.
  • Contributed to API design, domain modeling, and service layer implementation.
Exadel

Nov 2021 - Feb 2023

Remote

Exadel is a global software engineering company providing digital solutions for enterprise clients.

.NET Full Stack Developer (Blazor) – Residents Management Software

Jan 2022 - Feb 2023

Responsibilities:
  • Delivered fullstack features using Blazor and .NET in an on-prem monolithic system.
  • Designed and implemented domain logic, UI components, and database access layers.
.NET Backend Software Engineer – US Accounting Company

Nov 2021 - Mar 2022

Responsibilities:
  • Built RESTful APIs with .NET 6 in a cloud-hosted microservice architecture (Azure).
  • Worked closely with US-based teams to deliver finance-related backend functionality.
2
3
Way2Send

Jun 2019 - Oct 2021

Warsaw, Poland

Way2Send provides logistics and communication software solutions.

.NET Team Leader – WMS Software

Apr 2021 - Oct 2021

Responsibilities:
  • Led a backend team in designing and delivering core features of a monolithic WMS system.
  • Developed internal Web APIs using .NET Framework and .NET Core.
Full Stack Developer – .NET SaaS Solution

Jun 2019 - Mar 2021

Responsibilities:
  • Built and maintained a SaaS platform using Angular (frontend) and C# (backend).
  • Implemented client-driven features and provided 2nd-line technical support.
  • Migrated legacy system from .NET Framework 3.5 to .NET Core 3.0, improving performance and maintainability.

Education

Warsaw University of Technology
2018-2021
Bachelor of Science Electrical Engineering, Faculty of Electrical Engineering

Accomplishments

AZ-900
Microsoft

This certification demonstrates foundational knowledge of cloud services and how those services are provided with Microsoft Azure. It covers core Azure services, pricing, support, security, and governance features. It’s intended for individuals starting to work with cloud-based solutions and services.

AI-900
Microsoft

This certification provides a basic understanding of artificial intelligence (AI) and the services in Microsoft Azure that can be used to create AI solutions. It includes concepts like machine learning, computer vision, natural language processing, and conversational AI.

IELTS
IELTS (British Council, IDP, Cambridge)

International English Language Testing System (IELTS) assesses the language ability of people who want to study or work where English is the language of communication. A C1 level demonstrates effective operational proficiency and the ability to use English flexibly in social, academic, and professional settings.