Senior .NET Developer
We build innovative digital products for the modern workplace in the Cloud, and we need your expertise.
Want to work on backend systems that power real enterprise AI - not just another standard web application? Join us and help develop one of the first enterprise-grade MCP platform implementations in Poland.
As part of our team, you will:
Utilize your extensive knowledge of cloud computing, system integration, and software development,
Design and maintain cloud environments on Microsoft Azure that serve as the experimental backbone for the MCP Graph Broker - one of the first implementations of its kind for enterprise AI in Poland,
Configure and validate multi-tenant isolation, load balancing, and real-time monitoring mechanisms, ensuring that research on the Orchestration Layer translates into architecturally sound, scalable solutions,
Prepare production-grade environments for enterprise-scale adoption - from controlled lab conditions through to infrastructure serving 500,000+ daily users across banking, retail, and public sector.
Apply if you have:
Proven 5+ years of commercial experience in building scalable web applications, backend services, and enterprise-grade systems,
Strong knowledge of .NET Framework, ASP.NET MVC, Web API 2, MS SQL, Entity Framework, REST, and OData,
Familiarity with Azure services and best practices (e.g., Azure App Services, Azure Functions, Cosmos DB, Azure Search, Azure Service Bus, Azure SQL),
A solid understanding of Azure cloud services, microservices, and API management,
Familiarity with Agile methodologies, DevOps practices, and modern software development tools,
Knowledge and ability to apply Cloud Design Patterns,
Experience in building Enterprise SaaS applications,
Knowledge and experience of .NET / C# and design patterns: Clean Architecture, DDD, CQRS, Event Sourcing,
Experience in designing and implementing REST API and GraphQL - with emphasis on enterprise-grade APIs,
Knowledge of vector databases and semantic search techniques (e.g., Azure AI Search) in the context of RAG (Retrieval-Augmented Generation) systems,
Knowledge of the MCP (Model Context Protocol) protocol or similar context protocols, and practical use of machine learning tools/ML/AI APIs in production environments,
Experience in implementing AI API Layer solutions,
Experience in designing solutions resilient to high data volumes and high availability,
Experience in building application frameworks,
Strong problem-solving skills, leadership qualities, and excellent communication abilities,
A passion for technology and a keen eye for emerging trends,
Fluency in Polish (C1+) and English (B2+),
Ability to work from Białystok or surrounding areas; hybrid work model required (at least 3 days in the office + max 2 days remote per week),
Higher technical education (computer science or related field).
Nice to have:
Familiarity with agent orchestration patterns: routing, memory management, tool use, human-in-the-loop,
Experience with multi-tenant architecture - designing context separation, data isolation, and access policies in SaaS environments,
Practical knowledge of conversational and dialogue models (fine-tuning, RLHF, prompt engineering for LLMs) - particularly for AI assistant scenarios.
We offer:
Salary of PLN 20,000-22,000 gross per month (employment contract), 18-month contract with the possibility of extension,
Work and professional development while building a distributed enterprise-class cloud system based on AI as infrastructure, not as an add-on feature,
Direct impact on the architecture of a platform used by hundreds of thousands of employees,
Opportunity to explore Azure infrastructure solutions, the latest LLMs, and MLOps tools,
Multi-directional professional development, certifications, and knowledge sharing,
Flexible work model (hybrid),
Benefits package (private healthcare, Multisport card).