FullStack Developer (C# & Javascript)

Blazor Fullstack Developer Kraków Warsaw Poland (Hybrid 3 days onsite) PLN

What this job actually is

Youll 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 youll 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 youll do

• Build and enhance Blazor UI components for a customer-facing CAFM platform thats actively evolving

• Develop and maintain backend services in C# 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 dont have these this role isnt the right fit yet:

• 3 years of commercial C# development

• Blazor in production not just a demo or side project

• 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)

Youll hit the ground running if youve

• 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 somethings unclear take ownership without waiting to be told and follow through. You dont 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

1. Screening call with TechTree

2. Call with the Hiring Manager (Engineering Manager Poland)

3. Technical evaluation with practical exercises

What you get

• PLN 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