Senior Full Stack Developer (.NET + React)

Technologies we use

Expected

• C#
• React.js
• Microsoft SQL Server
• AWS
• Entity Framework

Optional

• LangChain
• R
• PyTorch

Operating system

• Windows

About the project

The project is an interactive form builder designed for marketers, researchers, HR, sales, and customer experience teams to create engaging, conversational online forms, surveys, and quizzes.

Key features: Visually appealing conversational design optimized for high completion rates; AI-powered data interpretation; Workflow and logic builders for personalized experiences; Brand customization options; Seamless integrations with various tools to automate data collection and streamline workflows.

This is how we organize our work

Team size

1-10

This is how we work

• you focus on a single project at a time
• you have influence on the choice of tools and technologies
• you have influence on the technological solutions applied
• you have influence on the product
• you focus on product development
• agile

Team members

• backend developer
• frontend developer
• fullstack developer
• data scientist
• automated test programmer
• product owner
• business analyst

Your responsibilities

• Collaborate with cross functional teams to design and enhance features.
• Implement new functionalities and improvements using C# and React.
• Manage production rollouts and ensure the smooth deployment of updates.
• Communicate effectively with Business Analysts to understand and translate business requirements.
• Adapt to project dynamics and changing requirements in a fast paced environment.

Our requirements

• 4+ years of experience developing commercial applications with .NET, primarily .NET 8.
• Proficiency in web technologies, including RESTful services and React applications.
• Experience with Windows Services.
• Solid experience with MS SQL.
• Solid experience with AWS services.
• Good understanding of at least one ORM, such as Entity Framework or Dapper.
• Understanding of design and development patterns, as well as multithreading concepts, including TPL and synchronization primitives.
• Experience with unit testing.
• Understanding of fundamental design principles for building scalable applications.
• Excellent collaboration and communication skills for cross functional teamwork.
• Self driven and proactive, with the ability to work independently in a remote environment.
• Good spoken English.

Optional

• Experience with agent frameworks, multi-step tool-use loops, or RAG systems at scale.
• Built or maintained an evaluation pipeline (offline evals, LLM-as-judge, human review loops).
• Open-source contributions, published writing, or talks on applied AI engineering.

This is how we work on a project

• code review
• design patterns
• unit tests

Benefits

• remote work opportunities

DataArt Poland sp. z o.o.

Our client is an international SaaS company developing tools that empower businesses to create highly engaging digital experiences. Their solutions are trusted by thousands of organizations worldwide to collect, analyze, and act on user data effectively.

This is how we work