Greenminds
Senior Full Stack Developer
- Compensation
- Not disclosed
- Location
- Warsaw, Poland
- Work setup
- Remote
- Seniority
- Senior
- Employment
- Contract
- Experience
- 4+ years
- Category
- Fullstack
- Posted
Skills
Must have
- 4+ years of professional software development experience (ideally 6+ years).
- Strong expertise in .NET Core / .NET 6+, ASP.NET Core, C#, and Web API.
- Experience developing RESTful APIs and integrations, working with SQL databases.
- Proficiency in frontend frameworks (Angular 2+, React, or Vue.js) and HTML5.
- Familiarity with unit & integration testing, clean coding practices, and Git.
- Ability to work across the stack (frontend, middleware, backend) with attention to performance and code quality.
- Comfortable using GenAI tools (e.g., Cursor, GitHub Copilot).
- Strong understanding of OOP, design principles, and patterns.
- Excellent collaboration skills with remote, distributed teams, strong ownership, and self-management.
- Good communication in Polish (very good) and English (B2/C1).
Full description
Senior Full Stack (.NET) Developer
We are looking for a highly skilled Senior Full Stack Developer to join our team and contribute to building modern, scalable web applications. This is a long-term engagement with 100% remote work, offered on a B2B contract.
Rate: 160–180 PLN/h (B2B)
Location: Remote (100%)
Languages required: Polish – very good; English – B2/C1
What We’re Looking For
- 4+ years of professional software development experience (ideally 6+ years).
- Strong expertise in .NET Core / .NET 6+, ASP.NET Core, C#, and Web API.
- Experience developing RESTful APIs and integrations, working with SQL databases.
- Proficiency in frontend frameworks (Angular 2+, React, or Vue.js) and HTML5.
- Familiarity with unit & integration testing, clean coding practices, and Git.
- Ability to work across the stack (frontend, middleware, backend) with attention to performance and code quality.
- Comfortable using GenAI tools (e.g., Cursor, GitHub Copilot).
- Strong understanding of OOP, design principles, and patterns.
- Excellent collaboration skills with remote, distributed teams, strong ownership, and self-management.
- Good communication in Polish (very good) and English (B2/C1).
Nice-to-Have (Desired Skills)
- Experience with TDD, automated tests, Agile methodologies, pair/mob programming (XP).
- Database experience with Microsoft SQL Server, PostgreSQL, Entity Framework Core, ADO.NET.
- Frontend experience with Bootstrap, TypeScript, JavaScript, CSS3.
- Knowledge of data sources (Data Warehouses, Lakehouses).
- Experience with Power BI REST APIs.
- Hands-on experience with AI engineering, including:
- Agent frameworks/orchestration (planning, multi-agent routing, tool calling).
- Retrieval-augmented generation (RAG), embeddings, vector/hybrid search (Azure AI Search).
- Microsoft Semantic Kernel or similar .NET agent orchestration tools.
- Long-running workflows and human-in-the-loop scenarios.
- Ability to identify and proactively .