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Senior Full-Stack .NET Engineer

Overview

Infinite Infrastructure develops and operates software platforms serving schools and local businesses. Through our core product lines — i2 Tickets, i2 Payments, and i2 Accounts — we support digital ticketing, payment processing, and account-based transactions across web, mobile, and point-of-sale environments.

 

We are seeking a Senior Full-Stack .NET Engineer to help expand, maintain, and improve our core systems. This role is focused on building reliable production software and contributing to long-term platform architecture.

What You’ll Work On

  • Backend APIs powering ticketing, payments, and account systems

  • Administrative and management portals used by schools and organizations

  • Distributed services and messaging infrastructure

  • Database design and performance optimization

  • Production troubleshooting and system reliability improvements

Technology Stack

  • .NET (8/9/10) – REST APIs

  • Blazor – Administrative & management portals

  • Vue.js

  • Next.js

  • Azure SQL

  • Event-driven architecture (MassTransit / messaging)

  • Docker & containerized services

  • .NET MAUI (select mobile applications)

Responsibilities

  • Design, build, and maintain RESTful APIs in .NET

  • Develop and enhance Blazor-based applications

  • Contribute to frontend systems when appropriate

  • Evaluate AI/automation opportunities and implement pragmatic integrations

  • Design and optimize relational database schemas

  • Diagnose and resolve production issues

  • Participate in architecture discussions and technical planning

  • Collaborate with external development partners when required

  • Write clean, maintainable, well-documented code

Required Qualifications

  • Exemplify i2's core values of Excellence, Personal Attention, and Respect

  • Strong proficiency in .NET and ASP.NET Core

  • Solid experience with relational databases and SQL

  • Ability to evaluate and implement current AI tools

  • Experience building and maintaining scalable web applications

  • Understanding of distributed systems concepts

  • Experience working with Git and structured development workflows

  • Strong analytical and problem-solving skills

Preferred Qualifications

  • Experience with Azure (AKS, App Gateway, networking)

  • Kubernetes experience

  • CI/CD pipeline experience

  • Experience with event-driven systems

  • Blazor expertise

  • Experience with payment or financial transaction systems

  • Experience with .NET MAUI mobile applications

How to Apply

Please submit your resume and a brief introduction to: bkatzmarzyk@i2enterprises.net

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​Include links to any relevant projects or GitHub repositories if available.

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