Regular Fullstack Developer (Vue.js + .Net) - Freelancer

Monterail; Warszawa; On-site; PLN 83,000 - 165,000; Full time

Job summary

Monterail in Warsaw is seeking a strong Regular Fullstack Developer (Vue.js + .NET) for a freelance greenfield project in retail. You will build a modern UI with Vue.js and robust backend services in .NET, working in a small two-person team alongside a Senior Developer.

You will integrate external systems (Shopify, Patchworks, RFID), deploy multi-tenant Azure architecture with SQL Server, and convert a POC into production-ready code.

Qualifications

• 3+ years of hands-on experience as a Fullstack Developer with Vue.js and .NET (C#).
• Self-driven approach to feature design and technical implementation, able to define functional requirements and basic user flows.
• Practical knowledge of SQL Server and core Azure services.
• Experience with REST APIs and third‑party integrations (e.g., e‑commerce platforms, ERP systems).
• Ability to take ownership of assigned tasks and collaborate in a small, agile team.
• Good command of English (B2+).
• Availability: Full-time on a B2B contract / hourly rates.

Responsibilities

• Build from Scratch: design and develop a greenfield retail dashboard using C#/.NET on the backend and Vue.js on the frontend.
• Integrate external systems like Shopify, Patchworks, and RFID tracking systems.
• Work with cloud infrastructure, implementing multi-tenant architecture on Azure with a SQL Server database.
• Translate the POC into production code, writing clean, scalable, maintainable software.

Skills

Vue.js

.NET (C#)

REST APIs

SQL Server

Azure

Self-driven

English (B2+)

Tools

Shopify

Patchworks

RFID systems

Job description

We are looking for a strong Regular Fullstack Developer (Vue.js + .Net) to join us on a freelance basis for a greenfield project in the retail industry.

In this role, your main drive will be crafting modern, high-performance user interfaces in Vue.js, while leveraging your .NET background to build and integrate supporting backend services. You will be part of a focused, self-sufficient two-person engineering team (working alongside a Senior Developer) building a multi-tenant dashboard application from scratch. The client has developed a Proof of Concept (POC), which will serve purely as a reference for business logic to help us architect and write the new system from the ground up.

If you are a Vue.js specialist who feels comfortable navigating .NET architectures and loves clean-slate development, this project is a great fit!

What you will do

• Build from Scratch: Help design and develop a greenfield retail dashboard application using C# / .NET on the backend and Vue.js on the frontend.
• Integrate External Systems: Connect the application with external retail and ERP platforms such as Shopify, Patchworks, and RFID tracking systems.
• Work with Cloud Infrastructure: Implement multi-tenant architecture hosted on Azure with a SQL Server database.
• Translate POC into Production Code: Use an existing prototype as a business logic template to write clean, scalable, and maintainable production software.

What we’re looking for

• Commercial Experience: 3+ years of hands-on experience as a Fullstack Developer working with Vue.js and .NET (C#)
• Product Thinking: Self-driven approach to feature design and technical implementation, capable of defining functional requirements and basic user flows independently to ensure fast, continuous delivery.
• Database & Cloud: Practical knowledge of SQL Server and core Azure services.
• Integrations: Experience working with REST APIs and third-party integrations (e.g., e-commerce platforms, ERP systems).
• Self-Reliance: Ability to take ownership of assigned tasks and collaborate effectively in a small, agile team.
• Language Skills: Good command of English (B2+) to ensure smooth communication.
• Availability: Full-time (B2B contract/hourly rates).

Nice to Have:

• Experience with multi-tenant application architecture.
• Prior exposure to retail tech, e-commerce, or logistics domains.

What do we mean by freelance?

• Read more at Monterail Tech Network