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WhyHireWrong?

FullStack Developer (C# & Javascript)

WhyHireWrong?
Poland · Full-time · Not Applicable
Blazor Fullstack Developer Kraków, Warsaw, Poland (Hybrid 3 days onsite)

  • PLN 250,000 – 280,000

What This Job Actually Is

You'll build and ship features for a Facilities Management SaaS platform used by real estate and healthcare clients across multiple countries. The product is actively moving its UI to Blazor, so you'll be doing real frontend and backend work on a live platform. You own your features from requirements to deployment, working in a small Agile team with international colleagues.

What You'll Do

  • Build and enhance Blazor UI components for a customer-facing CAFM platform that's actively evolving
  • Develop and maintain backend services in C#, ASP.NET, Web API, and Entity Framework
  • Write and optimize T-SQL queries, Stored Procedures, and SSIS packages against SQL Server
  • Participate in Agile ceremonies in English: standups, sprint planning, retrospectives
  • Own your features completely: scope, build, test, deploy
  • Contribute to CI/CD pipelines and DevOps practices alongside the team

What You Must Bring

This is a concrete stack. If you don't have these, this role isn't the right fit yet:

  • 3+ years of commercial C# and .NET development
  • Blazor in production, not just a demo or side project
  • ASP.NET, MVC, Web API, Entity Framework with real delivery behind you
  • SQL Server: T-SQL, Stored Procedures, and solving performance problems under real load
  • Basic JavaScript, jQuery, HTML5, and CSS to own UI delivery end to end
  • Working English, spoken and written, because daily international collaboration is a real part of the job
  • Based in Kraków, or genuinely open to relocating there (Warsaw considered if Kraków pipeline is empty)

You'll hit the ground running if you've

  • Shipped Blazor UIs in a live product used by actual customers
  • Delivered features end to end in a sprint-based team
  • Worked with colleagues in different time zones and made it work
  • Tuned SQL Server queries where performance actually mattered

Who Does Well Here

The team is direct and moves fast. They value people who speak up when something's unclear, take ownership without waiting to be told, and follow through. You don't need a traditional background or a perfect CV. Non-linear career paths are fine. What matters is what you can actually deliver.

The hiring process is inclusive. If you need adjustments at any stage, just say so.

The process

  • Screening call with TechTree
  • Call with the Hiring Manager (Engineering Manager, Poland)
  • Technical evaluation with practical exercises

What You Get

  • PLN 250,000 – 280,000 annually
  • Work on a greenfield codebase, not years of legacy debt
  • 3 days onsite in Kraków, the rest remote
  • A PE-backed product with a clear roadmap and real customers already using it

Key Skills

Ranked by relevance

sql ui server c javascript sql server devops jquery html5 saas cicd css
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Country Guide

Poland

Fast-growing Central European IT hub

Posted
May 15, 2026
Type
Full-time
Level
Not Applicable
Location
Warsaw
Company
WhyHireWrong?

Industries

Technology Information Internet

Categories

Engineering Information Technology

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